Knowledge

Archean felsic volcanic rocks

Source 📝

780: 20: 861:. Also, felsic volcanic rocks are distributed across long distances because of their extensive deposition. However, the rock sequences of greenstone belts are commonly obscured by later deformation, such as regional folding or intrusion of granitoids. By identifying these felsic sequences and dating their time of formation, stratigraphic units of different locations can be correlated despite the obstacles or discontinuity between felsic volcanic units. 421: 630:. The average composition of felsic volcanic rocks in Archean greenstone belts is between dacite and rhyolite (Table 2). In comparison, the modern felsic volcanic rock average composition (after Archean, <2.5 Ga) is similar to rhyolite, indicating a more felsic shift with greater alkali content in felsic volcanism. However, the composition may be biased because of weathering right after 1046: 510: 1084: 893:) are lack of zircon, only the age of felsic rocks can be dated among the volcanic rocks in greenstone belts. As felsic volcanic rocks are episodically deposited in between mafic layers, the age range of a particular mafic layer can be constrained by the upper and lower felsic volcanic layers. Thus the time of occurrence and the duration of volcanic episodes can be revealed. 614:
content in the rock are low, and it forms dacite or rhyolite. Magma is a mixture of various minerals. When minerals crystallise from the molten magma, they are progressively removed and dissociated from the melt. The last proportion of the melt is strongly fractionated, causing richness in quartz and
1033:
Records of Archean felsic volcanic rocks shows a peculiar trend. The eruption of felsic volcanic rocks and plutonic activities in Archean are largely synchronised as show in overlapping zircon ages. On contrary, the chemical compositions of some felsic volcanic rocks are similar to that of GMS but
820:
felsic lava flows elongate several kilometres. During an eruption, lava continuously wells out from the vent, then starts to flow outward on the sea floor. Due to quenching, lava is rapidly fragmented to form breccia. A new lobe of lava is injected inside the breccia but it is cooled less quickly,
783:
Fig. 4. Schematic illustration of documented subaqueous felsic lava deposits. (a) Submarine lava flow, based on Héré Creek rhyolite (modified from De Rosen-Spence et al., 1980). (b) Submarine lava dome, based on the Gold Lake dome and flow complex (modified from Lambert et al., 1990). Illustration
1096:
alters the geochemical signatures of the felsic rocks above the Earth's surface. The earliest weathering record can be traced back to 3.8 Ga during Eoarchean. Potassium is enriched but sodium is depleted in these weathered felsic rocks. Altered feldspars in the rocks may result in such anomalous
513:
Fig. 3. Archean felsic volcanic rocks have particular characteristic structure. Some are tuffs, formed by volcanic materials from eruption. A significant structure is fiamme, which are recrystallised quartz with flame-like ending points. The illustration is fiamme in Archean Woman Lake rhyolitic
720:, are reluctant to substitute into early-forming crystals. As a result, they tend to remain in the melt. In strongly fractionated felsic magma, zircon is easily saturated. As a result, zircon is common in felsic rocks. The timing of felsic volcanism and tectonic constraints can be identified by 804:
are so rare in the post-Archean. The dacitic or rhyolitic lava flows are quenched right after the eruption. When seawater contacts the flow, the lava quickly cools down. Finally, The lava solidifies and breaks up as clasts, and the clasts accumulate on the flow fronts to form
1915:
DiMarco, Michael J.; Lowe, Donald R. (1989). "Stratigraphy and sedimentology of an early Archean felsic volcanic sequence, eastern Pilbara Block, Western Australia, with special reference to the Duffer Formation and implications for crustal evolution".
2177:
Jayananda, M.; Peucat, J.-J.; Chardon, D.; Rao, B. Krishna; Fanning, C.M.; Corfu, F. (2013). "Neoarchean greenstone volcanism and continental growth, Dharwar craton, southern India: Constraints from SIMS U–Pb zircon geochronology and Nd isotopes".
195:
units make up the major volume of the volcanic units. The remaining volcanic units are extensive but thin felsic volcanic layers, such as Duffer Formation of the Warrawoona Group. The greenstone belts may be subsequently intruded by dome-shaped
1066:
rips up all GMS suites and deposited at a proximal distance. If this is true, then GMS and TTG intruded the crust together at the same time. No solid evidence is present yet but the irregular geochemical fingerprints may link both to TTG or
1790:
Manikyamba, C.; Ganguly, Sohini; Santosh, M.; Subramanyam, K.S.V. (2017). "Volcano-sedimentary and metallogenic records of the Dharwar greenstone terranes, India: Window to Archean plate tectonics, continent growth, and mineral endowment".
1570:
Van Kranendonk, Martin J.; Hugh Smithies, R.; Hickman, Arthur H.; Wingate, Michael T.D.; Bodorkos, Simon (2010). "Evidence for Mesoarchean (≈3.2Ga) rifting of the Pilbara Craton: The missing link in an early Precambrian Wilson cycle".
2223:
Vaasjoki, M., Sorjonen-Ward, P. and Lavikainen, S. (1993). U-Pb age delerminations and sulfide Pb-Pb Characteristics from the late Archean Hattu Schist Belt, Ilomantsi, eastern Finland. Geological Survev of Finland, Special Paper 17,
2980:
Liu, Xiao-Chi; Wu, Yuan-Bao; Fisher, Christopher M.; Hanchar, John M.; Beranek, Luke; Gao, Shan; Wang, Hao (2016). "Tracing crustal evolution by U-Th-Pb, Sm-Nd, and Lu-Hf isotopes in detrital monazite and zircon from modern rivers".
2636:
Krüner, Alfred; Byerly, Gary R.; Lowe, Donald R. (1991). "Chronology of early Archaean granite-greenstone evolution in the Barberton Mountain Land, South Africa, based on precise dating by single zircon evaporation".
1087:
Fig 6. Possible relationship 2 of Archean felsic volcanic rocks and granitoids. GMS and TTG may have intruded the crust at the same time. Yet, GMS was concentrated at the upper crust and TTG at deeper intermediate
1020:
materials formed older sodium-rich TTG and (b) melting of felsic materials (e.g. TTG and/or sediments) formed younger potassium-rich GMS (see Table 3). They imply gradual chemical changes in the magma and the
2283:
Nutman, Allen P.; Bennett, Vickie C.; Friend, Clark R.L.; Rosing, Minik T. (1997). "~ 3710 and ⪖ 3790 Ma volcanic sequences in the Isua (Greenland) supracrustal belt; structural and Nd isotope implications".
1673:
Paradis, Suzanne; Ludden, John; Gélinas, Léopold (1988). "Evidence for contrasting compositional spectra in comagmatic intrusive and extrusive rocks of the late Archean Blake River Group, Abitibi, Quebec".
23:
Fig. 1. A schematic diagram showing the formation environment of Archean felsic volcanic rocks. Modified from Giles (1980). Felsic eruption forms felsic volcanic rocks near the volcano and a spectrum of
1401:
de Rosen-Spence, Andrée F.; Provost, Gilles; Dimroth, Erich; Gochnauer, Karen; Owen, Victor (1980). "Archean subaqueous felsic flows, Rouyn-Noranda, Quebec, Canada, and their Quarternary equivalents".
2237:
KAMBER, B; WHITEHOUSE, M; BOLHAR, R; MOORBATH, S (2005). "Volcanic resurfacing and the early terrestrial crust: Zircon U–Pb and REE constraints from the Isua Greenstone Belt, southern West Greenland".
1042:
than other Archean felsic volcanic rocks) has no plutonic equivalent in the same period. The composition of felsic volcanic rocks are being altered concurrently with shifting granitoid composition.
1627:
Thorpe, R.I.; Hickman, A.H.; Davis, D.W.; Mortensen, J.K.; Trendall, A.F. (1992). "U-Pb zircon geochronology of Archaean felsic units in the Marble Bar region, Pilbara Craton, Western Australia".
2406:
Lesher, C. M.; Goodwin, A. M.; Campbell, I. H.; Gorton, M. P. (1986). "Trace-element geochemistry of ore-associated and barren, felsic metavolcanic rocks in the Superior Province, Canada".
800:
are the two common types of underwater deposits formed by Archean felsic volcanic rocks (Fig. 4). Documented Archean lava structures are distinctive from post-Archean felsic lava because
2451:"Evolution of the southern Abitibi greenstone belt based on U–Pb geochronology: autochthonous volcanic construction followed by plutonism, regional deformation and sedimentation" 2707:
Eruptive environment and geochemistry of Archaean ultramafic, mafic and felsic volcanic rocks of the eastern Yilgarn Craton : IAVCEI, Canberra 1993 : excursion guide
829:
Short, stocky dome with subsequent pyroclastic deposits extend less than few kilometres long. When explosive eruption occurs, volcanic fragments would be deposited by violent
1111: 3027:
Lowe, Donald R.; Byerly, Gary R. (2007), "Chapter 5.3 An Overview of the Geology of the Barberton Greenstone Belt and Vicinity: Implications for Early Crustal Development",
771:(hot, dense gas with volcanic fragments) instead of fluid lava flow. However, if the rhyolitic lava is still molten during eruption, it can behave and flow like fluid lava. 2010:
Kerrich, Robert; Polat, Ali (2006). "Archean greenstone-tonalite duality: Thermochemical mantle convection models or plate tectonics in the early Earth global dynamics?".
149:) that contributes over half the portion of Archean cratons. They have implications in finding how the felsic volcanic rocks were formed and related to the granitoids. 558:
into quartz with flame-like ending tips. The eutaxitic texture represents a hot vapour-phase emplacement of the fragmented volcanic materials on the Earth's surface.
2501:
Sylvester, Paul J.; Attoh, Kodjo; Schulz, Klaus J. (1987). "Tectonic setting of late Archean bimodal volcanism in the Michipicoten (Wawa) greenstone belt, Ontario".
564:
are present in massive, uniform felsic lava flow units. When the viscous lava flow encounters a surface, friction drags the mobile lava and forms internal banding.
3059:
Watkins, J. M.; Clemens, J. D.; Treloar, P. J. (2007-03-06). "Archaean TTGs as sources of younger granitic magmas: melting of sodic metatonalites at 0.6–1.2 GPa".
1049:
Fig 5. Possible relationship 1 of Archean felsic volcanic rocks and granitoids. GMS may have intruded the crust at a very shallow depth, and later TTG intruded.
2086:
Nelson, David R. (2001). "An assessment of the determination of depositional ages for precambrian clastic sedimentary rocks by U–Pb dating of detrital zircons".
2850:
Mueller, Wulf; White, James D.L. (1992). "Felsic fire-fountaining beneath Archean seas: pyroclastic deposits of the 2730 Ma Hunter Mine Group, Quebec, Canada".
1170:
Le Bas, M. J.; Le Maitre, R. W.; Streckeisen, A.; Zanettin, B. (1986). "A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram".
1070:
GMS is concentrated at the upper crust and TTG at deeper intermediate crust. Later, GMS as well as GMS-like volcanics are eroded and deposit as sediments. The
2544:
Turek, A.; Smith, Patrick E.; Schmus, W. R. Van (1982). "Rb–Sr and U–Pb ages of volcanism and granite emplacement in the Michipicoten belt—Wawa, Ontario".
2898:
Yamagishi, Hiromitsu; Dimroth, Erich (1985). "A comparison of Miocene and Archean rhyolite hyaloclastites: Evidence for a hot and fluid rhyolite lava".
165:
that pull apart, collide or tear continents. On average, the felsic volcanic rocks only contribute to ≈15-20% in volcanic rocks of greenstone belts.
767:
Submarine rhyolitic flows were widespread in the Archean but are uncommon in the modern volcanic environment. Viscous felsic eruption often causes
1325:
Condie, Kent C. (1993). "Chemical composition and evolution of the upper continental crust: Contrasting results from surface samples and shales".
2590:
Baldock, J.W.; Evans, J.A. (1988). "Constraints on the age of the Bulawayan group metavolcanic sequence, Harare Greenstone Belt, Zimbabwe".
1754:
Sylvester, P. J.; Harper, G. D.; Byerly, G. R.; Thurston, P. C. (1997). "Volcanic Aspects". In De Wit, Maarten J.; Ashwal, Lewis D. (eds.).
96:, silicate content <52%) occupy about 50% in the greenstone belts. Thus, felsic volcanic rocks are rare members in the Archean terranes. 599: 2167:
Nelson, D. R. (2001). 168961: welded tuffaceous rhyolite, Marda Tank. Geochronology Record, 195. Geological Survey of Western Australia.
833:. Coarse breccia would be formed as a result. Submarine sediments would subsequently be deposited along the steep flank of the volcano. 211:
constantly started removing earlier formed materials. So, studying the Archean supracrustal rocks back in deep time may be subjected to
2358:
Goodwin, A.M.; Smith, I.E.M. (1980). "Chemical discontinuities in Archean metavolcanic terrains and the development of Archean crust".
2714: 2062: 1964:
Barley, M.E. (1993). "Volcanic, sedimentary and tectonostratigraphic environments of the ≈3.46 Ga Warrawoona Megasequence: a review".
1763: 960: 907: 760:
is viscous, volcanic eruptions that form dacite or rhyolite are explosive and violent. The Archean felsic eruption may be assigned to
146: 2794:
Watson, E. Bruce (1979). "Zircon saturation in felsic liquids: Experimental results and applications to trace element geochemistry".
3044: 424:
Fig. 2. A map showing examples greenstone belts with documented Archean felsic volcanic rocks localities. See citations in Table 1.
1149:
Cohen, K.M., Finney, S.M., Gibbard, P.L., Fan, J.-X. (2013). The ICS International Chronostratigraphic Chart. Episodes 36, 199-204.
1836:"Subduction or sagduction? Ambiguity in constraining the origin of ultramafic–mafic bodies in the Archean crust of NW Scotland" 926:. They are magma chambers that later formed the volcanics on the Earth's surface by volcanic eruption. Later they intruded the 3119:"3806Ma Isua rhyolites and dacites affected by low temperature Eoarchaean surficial alteration: Earth's earliest weathering" 1214: 1071: 2954:"Stratigraphy, Facies and Structure in Volcanic and Sedimentary Rocks of the Archean Back River Volcanic Complex, N.w.t." 176: 77: 25: 878: 1835: 1136:
A comparative study of Archaean and Proterozoic felsic volcanic associations in Southern Australia / by Chris W. Giles
576: 551: 171:
All Archean felsic volcanic rocks are distributed in greenstone belts. In Archean cratons, greenstone belts represent
3117:
Nutman, Allen P.; Bennett, Vickie C.; Chivas, Allan R.; Friend, Clark R.L.; Liu, Xiao-Ming; Dux, Florian W. (2015).
1092:
Revealing the relationship between Archean felsic volcanic rocks and the granitoids may be difficult. It is because
3169: 1720:
Bleeker, W.; Davis, B. (2004). "What is a craton? How many are there? How do they relate? And how did they form?".
1528:"A review of Palaeoarchaean felsic volcanism in the eastern Kaapvaal craton: Linking plutonic and volcanic records" 930:
of similar age and composition in the Archean. The uprising magma bodies deformed the surface greenstone belt on a
595: 1834:
Johnson, Tim E.; Brown, Michael; Goodenough, Kathryn M.; Clark, Chris; Kinny, Peter D.; White, Richard W. (2016).
535: 65:
As the Archean Earth was hotter than the present, formation of felsic volcanic rocks may differ from the modern
3118: 145:
are the most prevalent rock type in Archean terranes. These intrusive felsic igneous rocks include TTG suites (
874: 736:
In the Archean aeon, underwater eruptions of felsic lava were common. Submarine eruption is evident by coarse
1035: 264: 184: 2125:
Hallberg, J.A.; Johnston, C.; Bye, S.M. (1976). "The Archaean Marda igneous complex, Western Australia".
3174: 639: 3130: 3068: 2990: 2907: 2859: 2803: 2760: 2646: 2599: 2553: 2510: 2462: 2415: 2367: 2293: 2246: 2187: 2134: 2091: 2055:
Volcanic successions modern and ancient: a geological approach to processes, products and successions
2019: 1973: 1925: 1850: 1800: 1729: 1683: 1636: 1580: 1461: 1411: 1334: 1262: 1179: 713: 631: 107:
environments. The composition of Archean felsic volcanic rocks are equivalent to a spectrum between
1134: 1039: 923: 834: 450:) content from 62 to 78 wt% in rock. In terms of mineralogy, the felsic volcanic rocks are rich in 857:
in greenstone belts. Felsic eruptions are episodic, making the felsic volcanic layers distinctive
779: 3092: 2827: 858: 801: 721: 672: 200:. The intrusion deformed the felsic volcanic rocks along with the volcano-sedimentary sequences. 84:
and only contribute to less 20% of rocks in the Archean greenstone belts worldwide. In contrast,
2751:
Thurston, P. C. (1980). "Subaerial volcanism in the Archean Uchi-Confederation volcanic belt".
1062:
GMS may have intruded the crust and GMS-like volcanics at a very shallow depth. Later, intense
3146: 3084: 3040: 3006: 2923: 2875: 2819: 2776: 2720: 2710: 2670: 2662: 2615: 2569: 2526: 2480: 2431: 2383: 2309: 2262: 2203: 2150: 2107: 2068: 2058: 2035: 1989: 1941: 1876: 1816: 1769: 1759: 1699: 1652: 1596: 1549: 1479: 1427: 1358: 1280: 1195: 1106: 1058:
The older GMS-like felsic volcanic rocks formed with similar age of TTG has two implications:
927: 830: 817: 555: 539: 347: 172: 104: 51: 19: 3138: 3076: 3032: 2998: 2960: 2915: 2867: 2811: 2768: 2654: 2650: 2607: 2561: 2518: 2470: 2423: 2375: 2338: 2301: 2254: 2250: 2195: 2142: 2099: 2027: 1981: 1933: 1866: 1858: 1808: 1691: 1644: 1588: 1539: 1469: 1419: 1350: 1342: 1270: 1187: 768: 761: 745: 737: 725: 583: 400: 180: 55: 1022: 886: 619: 580: 514:
tuff, Superior Province, Canada. Adopted and modified from photograph of Thurston (1980).
443: 188: 162: 73: 66: 3134: 3072: 2994: 2911: 2863: 2807: 2764: 2603: 2557: 2514: 2466: 2419: 2371: 2297: 2191: 2138: 2095: 2023: 1977: 1929: 1854: 1804: 1733: 1687: 1640: 1584: 1465: 1415: 1338: 1266: 1183: 531: 479: 286: 3036: 2475: 2450: 2449:
Ayer, J.; Amelin, Y.; Corfu, F.; Kamo, S.; Ketchum, J.; Kwok, K.; Trowell, N. (2002).
2305: 2103: 3163: 3096: 2919: 2871: 2831: 2772: 2658: 2611: 2379: 2146: 1985: 1937: 1648: 1423: 1346: 870: 571:
is commonly found in Archean felsic volcanic rocks. In submarine environments, water
494:). The mineralogy seems similar with modern rhyolites and dacites. The volcanics are 212: 197: 131: 39: 3142: 2199: 1862: 1592: 1450:"A Geochemical Overview of Mid-Archaean Metavolcanic Rocks from Southwest Greenland" 1016:
The two kinds of granitoids have different magma origins: (a) melting of water-rich
161:. A craton is an ancient stable continental block. Also, a craton has survived from 2330:
Mortensen, J. K.; Thorpe, R. I.; Padgham, W. A.; Keng, J. E.; Davis, W. J. (1988).
850: 749: 635: 561: 527: 124: 120: 2952:
Lambert, M B; Burbidge, G; Jefferson, C W; Beaumont-smith, C; Lustwerk, R (1990).
219:
Table 1. Examples of Archean felsic volcanic rocks occurrence in greenstone belts
167:
See Figure 2 and Table 1 for Examples of Archean felsic volcanic rocks occurrence.
1191: 2031: 1250: 499: 420: 81: 2258: 1474: 1449: 1251:"Archaean granitoids: an overview and significance from a tectonic perspective" 3080: 1544: 1527: 1093: 1083: 1004: 503: 471: 116: 62:
on the Earth's surface started 500 million years after the Earth's formation.
3150: 3088: 3010: 2927: 2879: 2823: 2780: 2724: 2666: 2619: 2573: 2530: 2484: 2435: 2387: 2313: 2266: 2207: 2154: 2111: 2072: 2039: 1993: 1945: 1880: 1871: 1820: 1812: 1703: 1656: 1600: 1553: 1483: 1431: 1362: 1284: 1199: 1773: 1045: 993: 975: 915: 906:
Two plutonic, igneous rock suites form 50% of Archean cratons. They are (1)
854: 838: 796: 790: 717: 607: 572: 509: 491: 475: 204: 142: 100: 93: 72:
Archean felsic volcanic rocks are distributed only in the preserved Archean
59: 2674: 1034:
they are much older than GMS. For example, a GMS-like rhyolite unit in the
495: 463: 451: 112: 1354: 2815: 1063: 997: 989: 919: 911: 806: 741: 568: 487: 208: 179:. Some volcanic sequences can be several kilometers thick, such as the 43: 3002: 1275: 971: 966: 931: 890: 753: 709: 547: 543: 523: 467: 459: 455: 439: 158: 138:. They are important to reconstruct Archean geological environments. 135: 108: 89: 47: 36: 2565: 2522: 2427: 1695: 542:
tuff from Superior Province, Canada (Figure 3), contains lenticular
2965: 2953: 2709:. Australia: Australian Geological Survey Organisation. p. 6. 2343: 2331: 784:
adopted from Sylvester et al. (1997) in de Wit & Ashwal (1997).
58:, Archean felsic volcanic rocks provide clues on the Earth's first 2957:
Current Research, Part C, Geological Survey of Canada, Paper 90-IC
1082: 1044: 1017: 897:
Relationships between Archean felsic volcanic rocks and granitoids
882: 778: 757: 603: 508: 419: 192: 85: 18: 2332:"U-Pb zircon ages for felsic volcanism in Slave Porvince, N.W.T." 627: 611: 519: 483: 207:
is relatively easier than observing Archean volcanism, because
594:
The composition of Archean felsic volcanic rocks falls in the
175:
formed at the Earth's surface and the belts are dominated by
1074:
may show a range of mixed GMS and TTG geochemical signature.
157:
Archean felsic volcanic rocks are only preserved in Archean
849:
Archean felsic volcanic rocks are important in determining
1526:
Agangi, Andrea; Hofmann, Axel; Elburg, Marlina A. (2018).
1249:
Halla, J; Whitehouse, M. J.; Ahmad, T.; Bagai, Z. (2017).
938:
Table 3. Comparison between 2 common Archean Granitoids
2592:
Journal of African Earth Sciences (and the Middle East)
646:
Table 2. Average composition of felsic volcanic rocks
2705:
Morris, P. A.; Barnes, S. J.; Hill, R. E. T. (1993).
1112:
Tectonic evolution of the Barberton greenstone belt
550:deposits on a cool surface, it is rapidly cooled, 134:and match distant rock units in separated Archean 80:are common. Felsic volcanic rocks are rare in the 54:content of 62–78%. Given that the Earth formed at 1038:(abnormally more enriched in potassium and heavy 1255:Geological Society, London, Special Publications 615:feldspars that make the volcanic rocks felsic. 16:Felsic volcanic rocks formed in the Archean Eon 2900:Journal of Volcanology and Geothermal Research 2852:Journal of Volcanology and Geothermal Research 618:Dacite and rhyolite are characterised by high 130:Archean felsic volcanic rocks are utilised to 2335:Radiogenic Age and Isotopic Studies: Report 2 708:Archean felsic volcanic rocks also have high 8: 1758:. Oxford: Clarendon Press. pp. 55–90. 598:series. Such magmatic series indicate that 1215:"How Science Figured Out the Age of Earth" 518:Felsic volcanic rocks also include felsic 217: 3061:Contributions to Mineralogy and Petrology 2964: 2796:Contributions to Mineralogy and Petrology 2474: 2342: 1870: 1543: 1473: 1274: 936: 644: 46:(4 to 2.5 billion years ago). The term " 1668: 1666: 1122: 78:sequences of volcanic-sedimentary rocks 3112: 3110: 3108: 3106: 3022: 3020: 2947: 2945: 2943: 2941: 2939: 2937: 2893: 2891: 2889: 2845: 2843: 2841: 2746: 2744: 2742: 2740: 2738: 2736: 2734: 2700: 2698: 2696: 2694: 2692: 2690: 2688: 2686: 2684: 2631: 2629: 2585: 2583: 2401: 2399: 2397: 2325: 2323: 2278: 2276: 2232: 2230: 2219: 2217: 1959: 1957: 1955: 1910: 1749: 1747: 1745: 1743: 1715: 1713: 1396: 1394: 1392: 821:and pushes the flow further outwards. 526:was consolidated. Tuff is composed of 502:texture that certain larger minerals ( 366:Upper Michipicoten volcanic sequences 2496: 2494: 2005: 2003: 1908: 1906: 1904: 1902: 1900: 1898: 1896: 1894: 1892: 1890: 1785: 1783: 1622: 1620: 1618: 1616: 1614: 1612: 1610: 1565: 1563: 1521: 1519: 1517: 1515: 1513: 1443: 1441: 1390: 1388: 1386: 1384: 1382: 1380: 1378: 1376: 1374: 1372: 1320: 1318: 1316: 1314: 1244: 1242: 1240: 1238: 1236: 1234: 1165: 1163: 1161: 1159: 1157: 1155: 1128: 1126: 873:of Archean events strongly relies on 115:. They can be distinguished by their 7: 1511: 1509: 1507: 1505: 1503: 1501: 1499: 1497: 1495: 1493: 1312: 1310: 1308: 1306: 1304: 1302: 1300: 1298: 1296: 1294: 132:date the timing of geological events 2639:Earth and Planetary Science Letters 2239:Earth and Planetary Science Letters 1133:Giles, Christopher William (1980). 2546:Canadian Journal of Earth Sciences 2503:Canadian Journal of Earth Sciences 2408:Canadian Journal of Earth Sciences 1676:Canadian Journal of Earth Sciences 961:Tonalite-trondhjemite-granodiorite 908:Tonalite-trondhjemite-granodiorite 579:. The flow is fragmented and form 458:. A typical mineral assemblage is 147:Tonalite-trondhjemite-granodiorite 14: 224:Felsic volcanic units/localities 2053:Cas, R.; A.F Wright, J. (1996). 3143:10.1016/j.precamres.2015.07.014 2200:10.1016/j.precamres.2012.05.002 1863:10.1016/j.precamres.2016.07.013 1593:10.1016/j.precamres.2009.11.007 3031:, Elsevier, pp. 481–526, 744:, hyaloclastite or underwater 575:and cools lava rapidly during 330:Musk massive sulphide deposit 1: 3037:10.1016/s0166-2635(07)15053-2 2476:10.1016/s0301-9268(02)00006-2 2306:10.1016/s0009-2541(97)00084-3 2104:10.1016/s0037-0738(01)00067-7 177:volcano-sedimentary sequences 33:Archean felsic volcanic rocks 2920:10.1016/0377-0273(85)90040-x 2872:10.1016/0377-0273(92)90118-w 2773:10.1016/0301-9268(80)90024-8 2659:10.1016/0012-821x(91)90148-b 2612:10.1016/0899-5362(88)90022-x 2380:10.1016/0301-9268(80)90016-9 2147:10.1016/0301-9268(76)90029-2 1986:10.1016/0301-9268(93)90044-3 1938:10.1016/0301-9268(89)90080-6 1722:AGU Spring Meeting Abstracts 1649:10.1016/0301-9268(92)90100-3 1424:10.1016/0301-9268(80)90023-6 1347:10.1016/0009-2541(93)90140-e 277:Kallehadlu Felsic Volcanics 50:" means that the rocks have 26:volcano-sedimentary sequence 2032:10.1016/j.tecto.2005.12.004 1448:Szilas, Kristoffer (2018). 3191: 2259:10.1016/j.epsl.2005.09.037 1475:10.3390/geosciences8070266 1192:10.1093/petrology/27.3.745 949:Important mineral present 902:From TTG to GMS granitoids 845:Stratigraphic significance 600:fractional crystallisation 3081:10.1007/s00410-007-0181-0 2337:. Paper No. 88-2: 85–95. 1545:10.1016/j.gsf.2017.08.003 606:occurred during cooling. 28:in the sea in Archean. 1813:10.1016/j.gr.2017.06.005 1029:Conflicting compositions 986:Younger (2nd granitoid) 626:) content from 62 to 78 498:, whereas some exhibits 88:volcanic rocks (such as 42:that were formed in the 2651:1991E&PSL.103...41K 2251:2005E&PSL.240..276K 1036:Abitibi Greenstone Belt 638:during later stages of 506:) are visible by eyes. 250:Eastern Pilbara Craton 125:rock layer relationship 1089: 1054:Possible relationships 1050: 957:Older (1st granitoid) 785: 762:Vesuvius eruption type 515: 434:Mineralogy and texture 425: 322:North Atlantic Craton 265:Marda Volcanic Complex 185:Eastern Pilbara Craton 29: 1086: 1048: 981:hydrated mafic crust 910:(TTG) suites and (2) 782: 714:Incompatible elements 522:that was formed when 512: 423: 56:~4.5 billion year ago 22: 3123:Precambrian Research 3029:Earth's Oldest Rocks 2753:Precambrian Research 2455:Precambrian Research 2360:Precambrian Research 2180:Precambrian Research 2127:Precambrian Research 2057:. Chapman and Hall. 1966:Precambrian Research 1918:Precambrian Research 1843:Precambrian Research 1629:Precambrian Research 1573:Precambrian Research 1532:Geoscience Frontiers 1404:Precambrian Research 1172:Journal of Petrology 837:would occur to form 835:Submarine landslides 802:underwater eruptions 764:in the present day. 756:only). Since felsic 3135:2015PreR..268..323N 3073:2007CoMP..154...91W 2995:2017Geo....45..103L 2912:1985JVGR...23..337Y 2864:1992JVGR...54..117M 2808:1979CoMP...70..407W 2765:1980PreR...12...79T 2604:1988JAfES...7..795B 2558:1982CaJES..19.1608T 2515:1987CaJES..24.1120S 2467:2002PreR..115...63A 2420:1986CaJES..23..222L 2372:1980PreR...10..301G 2298:1997ChGeo.141..271N 2192:2013PreR..227...55J 2139:1976PreR....3..111H 2096:2001SedG..141...37N 2088:Sedimentary Geology 2024:2006Tectp.415..141K 1978:1993PreR...60...47B 1930:1989PreR...44..147D 1855:2016PreR..283...89J 1805:2017GondR..50...38M 1734:2004AGUSM.T41C..01B 1688:1988CaJES..25..134P 1641:1992PreR...56..169T 1585:2010PreR..177..145V 1466:2018Geosc...8..266S 1416:1980PreR...12...43D 1339:1993ChGeo.104....1C 1267:2017GSLSP.449....1H 1219:Scientific American 1213:Braterman, Paul S. 1184:1986JPet...27..745B 1040:rare-earth elements 967:Na-rich plagioclase 939: 924:chronological order 885:rocks (contain low 865:Timing of volcanism 859:stratigraphic units 775:Subaqueous deposits 673:Rock Classification 647: 313:Sample SM/GR/93/57 296:Kovero schist belt 220: 117:mineral assemblages 101:volcanic activities 60:volcanic activities 2816:10.1007/bf00371047 2090:. 141–142: 37–60. 1090: 1051: 937: 928:supracrustal rocks 786: 752:rock, composed of 722:radiometric dating 645: 516: 426: 392:Zimbabwean Craton 375:Superior Province 358:Superior Province 283:Gadag-Chitradurga 218: 205:volcanic processes 173:supracrustal rocks 127:in the sequences. 103:commonly occur in 30: 3170:Archean volcanism 1872:20.500.11937/9924 1793:Gondwana Research 1107:Eoarchean geology 1014: 1013: 889:content, such as 831:pyroclastic flows 726:isotopic analysis 706: 705: 577:volcanic eruption 442:" refers to high 418: 417: 348:Blake River Group 333:2689.3 +2.4/-1.8 241:Duffer Formation 203:Observing modern 76:, where deformed 3182: 3155: 3154: 3114: 3101: 3100: 3056: 3050: 3049: 3024: 3015: 3014: 3003:10.1130/g38720.1 2977: 2971: 2970: 2968: 2949: 2932: 2931: 2906:(3–4): 337–355. 2895: 2884: 2883: 2858:(1–2): 117–134. 2847: 2836: 2835: 2791: 2785: 2784: 2748: 2729: 2728: 2702: 2679: 2678: 2633: 2624: 2623: 2598:(5–6): 795–804. 2587: 2578: 2577: 2552:(8): 1608–1626. 2541: 2535: 2534: 2509:(6): 1120–1134. 2498: 2489: 2488: 2478: 2446: 2440: 2439: 2403: 2392: 2391: 2366:(3–4): 301–311. 2355: 2349: 2348: 2346: 2327: 2318: 2317: 2292:(3–4): 271–287. 2286:Chemical Geology 2280: 2271: 2270: 2234: 2225: 2221: 2212: 2211: 2174: 2168: 2165: 2159: 2158: 2122: 2116: 2115: 2083: 2077: 2076: 2050: 2044: 2043: 2018:(1–4): 141–165. 2007: 1998: 1997: 1961: 1950: 1949: 1912: 1885: 1884: 1874: 1840: 1831: 1825: 1824: 1787: 1778: 1777: 1756:Greenstone belts 1751: 1738: 1737: 1717: 1708: 1707: 1670: 1661: 1660: 1635:(3–4): 169–189. 1624: 1605: 1604: 1579:(1–2): 145–161. 1567: 1558: 1557: 1547: 1523: 1488: 1487: 1477: 1445: 1436: 1435: 1398: 1367: 1366: 1327:Chemical Geology 1322: 1289: 1288: 1278: 1276:10.1144/SP449.10 1246: 1229: 1228: 1226: 1225: 1210: 1204: 1203: 1167: 1150: 1147: 1141: 1140: 1130: 1072:detrital zircons 940: 922:(GMS) suites in 769:pyroclastic flow 738:volcanic breccia 688:Dacite–Rhyolite 648: 584:volcanic breccia 536:lithic fragments 438:The meaning of " 411:Kaapvaal Craton 401:Onverwacht Group 383:Bulawayan Group 230:Greenstone belt 221: 181:Warrawoona Group 74:greenstone belts 3190: 3189: 3185: 3184: 3183: 3181: 3180: 3179: 3160: 3159: 3158: 3116: 3115: 3104: 3058: 3057: 3053: 3047: 3026: 3025: 3018: 2979: 2978: 2974: 2951: 2950: 2935: 2897: 2896: 2887: 2849: 2848: 2839: 2793: 2792: 2788: 2750: 2749: 2732: 2717: 2704: 2703: 2682: 2635: 2634: 2627: 2589: 2588: 2581: 2566:10.1139/e82-138 2543: 2542: 2538: 2523:10.1139/e87-109 2500: 2499: 2492: 2448: 2447: 2443: 2428:10.1139/e86-025 2405: 2404: 2395: 2357: 2356: 2352: 2329: 2328: 2321: 2282: 2281: 2274: 2236: 2235: 2228: 2222: 2215: 2176: 2175: 2171: 2166: 2162: 2124: 2123: 2119: 2085: 2084: 2080: 2065: 2052: 2051: 2047: 2009: 2008: 2001: 1963: 1962: 1953: 1914: 1913: 1888: 1838: 1833: 1832: 1828: 1789: 1788: 1781: 1766: 1753: 1752: 1741: 1719: 1718: 1711: 1696:10.1139/e88-013 1672: 1671: 1664: 1626: 1625: 1608: 1569: 1568: 1561: 1525: 1524: 1491: 1447: 1446: 1439: 1400: 1399: 1370: 1324: 1323: 1292: 1248: 1247: 1232: 1223: 1221: 1212: 1211: 1207: 1169: 1168: 1153: 1148: 1144: 1132: 1131: 1124: 1120: 1103: 1081: 1056: 1031: 904: 899: 867: 847: 827: 815: 777: 734: 668: 664: 657: 625: 592: 449: 436: 431: 429:Characteristics 339:Slave Province 269:Yilgarn Craton 236:Country/Region 163:plate tectonics 155: 99:Archean felsic 67:plate tectonics 17: 12: 11: 5: 3188: 3186: 3178: 3177: 3172: 3162: 3161: 3157: 3156: 3102: 3051: 3045: 3016: 2989:(2): 103–106. 2972: 2966:10.4095/131253 2933: 2885: 2837: 2802:(4): 407–419. 2786: 2759:(1–4): 79–98. 2730: 2716:978-0642196637 2715: 2680: 2645:(1–4): 41–54. 2625: 2579: 2536: 2490: 2461:(1–4): 63–95. 2441: 2414:(2): 222–237. 2393: 2350: 2344:10.4095/126606 2319: 2272: 2245:(2): 276–290. 2226: 2213: 2169: 2160: 2133:(2): 111–136. 2117: 2078: 2064:978-0412446405 2063: 2045: 2012:Tectonophysics 1999: 1972:(1–4): 47–67. 1951: 1924:(2): 147–169. 1886: 1826: 1779: 1765:978-0198540564 1764: 1739: 1709: 1682:(1): 134–144. 1662: 1606: 1559: 1538:(3): 667–688. 1489: 1437: 1410:(1–4): 43–77. 1368: 1290: 1230: 1205: 1178:(3): 745–750. 1151: 1142: 1121: 1119: 1116: 1115: 1114: 1109: 1102: 1099: 1080: 1077: 1076: 1075: 1068: 1055: 1052: 1030: 1027: 1012: 1011: 1008: 1001: 987: 983: 982: 979: 964: 958: 954: 953: 950: 947: 944: 903: 900: 898: 895: 866: 863: 846: 843: 826: 823: 814: 811: 776: 773: 733: 732:Eruption style 730: 704: 703: 700: 697: 694: 690: 689: 686: 683: 680: 676: 675: 670: 666: 662: 659: 655: 652: 623: 591: 588: 567:Structureless 552:recrystallised 447: 435: 432: 430: 427: 416: 415: 412: 409: 406: 403: 397: 396: 393: 390: 387: 384: 380: 379: 376: 373: 370: 367: 363: 362: 359: 356: 353: 350: 344: 343: 340: 337: 334: 331: 327: 326: 323: 320: 317: 314: 310: 309: 306: 305:Baltic Shield 303: 300: 297: 293: 292: 289: 287:Dharwar Craton 284: 281: 278: 274: 273: 270: 267: 262: 259: 255: 254: 251: 248: 245: 242: 238: 237: 234: 231: 228: 225: 198:magma chambers 154: 151: 121:rock chemistry 40:volcanic rocks 15: 13: 10: 9: 6: 4: 3: 2: 3187: 3176: 3173: 3171: 3168: 3167: 3165: 3152: 3148: 3144: 3140: 3136: 3132: 3128: 3124: 3120: 3113: 3111: 3109: 3107: 3103: 3098: 3094: 3090: 3086: 3082: 3078: 3074: 3070: 3067:(1): 91–110. 3066: 3062: 3055: 3052: 3048: 3046:9780444528100 3042: 3038: 3034: 3030: 3023: 3021: 3017: 3012: 3008: 3004: 3000: 2996: 2992: 2988: 2984: 2976: 2973: 2967: 2962: 2958: 2955: 2948: 2946: 2944: 2942: 2940: 2938: 2934: 2929: 2925: 2921: 2917: 2913: 2909: 2905: 2901: 2894: 2892: 2890: 2886: 2881: 2877: 2873: 2869: 2865: 2861: 2857: 2853: 2846: 2844: 2842: 2838: 2833: 2829: 2825: 2821: 2817: 2813: 2809: 2805: 2801: 2797: 2790: 2787: 2782: 2778: 2774: 2770: 2766: 2762: 2758: 2754: 2747: 2745: 2743: 2741: 2739: 2737: 2735: 2731: 2726: 2722: 2718: 2712: 2708: 2701: 2699: 2697: 2695: 2693: 2691: 2689: 2687: 2685: 2681: 2676: 2672: 2668: 2664: 2660: 2656: 2652: 2648: 2644: 2640: 2632: 2630: 2626: 2621: 2617: 2613: 2609: 2605: 2601: 2597: 2593: 2586: 2584: 2580: 2575: 2571: 2567: 2563: 2559: 2555: 2551: 2547: 2540: 2537: 2532: 2528: 2524: 2520: 2516: 2512: 2508: 2504: 2497: 2495: 2491: 2486: 2482: 2477: 2472: 2468: 2464: 2460: 2456: 2452: 2445: 2442: 2437: 2433: 2429: 2425: 2421: 2417: 2413: 2409: 2402: 2400: 2398: 2394: 2389: 2385: 2381: 2377: 2373: 2369: 2365: 2361: 2354: 2351: 2345: 2340: 2336: 2333: 2326: 2324: 2320: 2315: 2311: 2307: 2303: 2299: 2295: 2291: 2287: 2279: 2277: 2273: 2268: 2264: 2260: 2256: 2252: 2248: 2244: 2240: 2233: 2231: 2227: 2220: 2218: 2214: 2209: 2205: 2201: 2197: 2193: 2189: 2185: 2181: 2173: 2170: 2164: 2161: 2156: 2152: 2148: 2144: 2140: 2136: 2132: 2128: 2121: 2118: 2113: 2109: 2105: 2101: 2097: 2093: 2089: 2082: 2079: 2074: 2070: 2066: 2060: 2056: 2049: 2046: 2041: 2037: 2033: 2029: 2025: 2021: 2017: 2013: 2006: 2004: 2000: 1995: 1991: 1987: 1983: 1979: 1975: 1971: 1967: 1960: 1958: 1956: 1952: 1947: 1943: 1939: 1935: 1931: 1927: 1923: 1919: 1911: 1909: 1907: 1905: 1903: 1901: 1899: 1897: 1895: 1893: 1891: 1887: 1882: 1878: 1873: 1868: 1864: 1860: 1856: 1852: 1848: 1844: 1837: 1830: 1827: 1822: 1818: 1814: 1810: 1806: 1802: 1798: 1794: 1786: 1784: 1780: 1775: 1771: 1767: 1761: 1757: 1750: 1748: 1746: 1744: 1740: 1735: 1731: 1727: 1723: 1716: 1714: 1710: 1705: 1701: 1697: 1693: 1689: 1685: 1681: 1677: 1669: 1667: 1663: 1658: 1654: 1650: 1646: 1642: 1638: 1634: 1630: 1623: 1621: 1619: 1617: 1615: 1613: 1611: 1607: 1602: 1598: 1594: 1590: 1586: 1582: 1578: 1574: 1566: 1564: 1560: 1555: 1551: 1546: 1541: 1537: 1533: 1529: 1522: 1520: 1518: 1516: 1514: 1512: 1510: 1508: 1506: 1504: 1502: 1500: 1498: 1496: 1494: 1490: 1485: 1481: 1476: 1471: 1467: 1463: 1459: 1455: 1451: 1444: 1442: 1438: 1433: 1429: 1425: 1421: 1417: 1413: 1409: 1405: 1397: 1395: 1393: 1391: 1389: 1387: 1385: 1383: 1381: 1379: 1377: 1375: 1373: 1369: 1364: 1360: 1356: 1352: 1348: 1344: 1340: 1336: 1333:(1–4): 1–37. 1332: 1328: 1321: 1319: 1317: 1315: 1313: 1311: 1309: 1307: 1305: 1303: 1301: 1299: 1297: 1295: 1291: 1286: 1282: 1277: 1272: 1268: 1264: 1260: 1256: 1252: 1245: 1243: 1241: 1239: 1237: 1235: 1231: 1220: 1216: 1209: 1206: 1201: 1197: 1193: 1189: 1185: 1181: 1177: 1173: 1166: 1164: 1162: 1160: 1158: 1156: 1152: 1146: 1143: 1138: 1137: 1129: 1127: 1123: 1117: 1113: 1110: 1108: 1105: 1104: 1100: 1098: 1095: 1085: 1078: 1073: 1069: 1065: 1061: 1060: 1059: 1053: 1047: 1043: 1041: 1037: 1028: 1026: 1024: 1023:Earth's crust 1019: 1010:felsic crust 1009: 1007: 1006: 1002: 999: 995: 991: 988: 985: 984: 980: 978: 977: 973: 968: 965: 962: 959: 956: 955: 952:Magma origin 951: 948: 945: 943:Relative age 942: 941: 935: 933: 929: 925: 921: 917: 913: 909: 901: 896: 894: 892: 888: 884: 880: 876: 872: 871:geochronology 864: 862: 860: 856: 852: 844: 842: 840: 836: 832: 824: 822: 819: 812: 810: 808: 803: 799: 798: 793: 792: 781: 774: 772: 770: 765: 763: 759: 755: 751: 747: 743: 739: 731: 729: 727: 723: 719: 715: 711: 701: 698: 695: 693:Post-Archean 692: 691: 687: 684: 681: 678: 677: 674: 671: 660: 653: 650: 649: 643: 641: 637: 633: 629: 621: 616: 613: 609: 605: 601: 597: 596:calc-alkaline 589: 587: 585: 582: 578: 574: 570: 569:hyaloclastite 565: 563: 559: 557: 553: 549: 545: 541: 537: 533: 529: 525: 521: 511: 507: 505: 501: 497: 493: 489: 485: 481: 477: 473: 469: 465: 461: 457: 453: 445: 441: 433: 428: 422: 414:South Africa 413: 410: 407: 404: 402: 399: 398: 394: 391: 388: 385: 382: 381: 377: 374: 371: 368: 365: 364: 360: 357: 354: 351: 349: 346: 345: 341: 338: 335: 332: 329: 328: 324: 321: 318: 315: 312: 311: 307: 304: 301: 298: 295: 294: 290: 288: 285: 282: 279: 276: 275: 271: 268: 266: 263: 260: 257: 256: 252: 249: 246: 243: 240: 239: 235: 232: 229: 226: 223: 222: 216: 214: 213:sampling bias 210: 206: 201: 199: 194: 190: 186: 182: 178: 174: 169: 168: 164: 160: 152: 150: 148: 144: 139: 137: 133: 128: 126: 122: 118: 114: 110: 106: 102: 97: 95: 91: 87: 83: 79: 75: 70: 68: 63: 61: 57: 53: 49: 45: 41: 38: 34: 27: 21: 3175:Felsic rocks 3126: 3122: 3064: 3060: 3054: 3028: 2986: 2982: 2975: 2956: 2903: 2899: 2855: 2851: 2799: 2795: 2789: 2756: 2752: 2706: 2642: 2638: 2595: 2591: 2549: 2545: 2539: 2506: 2502: 2458: 2454: 2444: 2411: 2407: 2363: 2359: 2353: 2334: 2289: 2285: 2242: 2238: 2183: 2179: 2172: 2163: 2130: 2126: 2120: 2087: 2081: 2054: 2048: 2015: 2011: 1969: 1965: 1921: 1917: 1846: 1842: 1829: 1796: 1792: 1755: 1725: 1721: 1679: 1675: 1632: 1628: 1576: 1572: 1535: 1531: 1457: 1453: 1407: 1403: 1355:10068/310317 1330: 1326: 1258: 1254: 1222:. Retrieved 1218: 1208: 1175: 1171: 1145: 1135: 1097:signatures. 1091: 1057: 1032: 1015: 1003: 970: 905: 879:Lu-Hf dating 868: 851:absolute age 848: 828: 816: 795: 789: 787: 766: 735: 707: 636:metamorphism 617: 593: 590:Geochemistry 566: 560: 532:glass shards 528:volcanic ash 517: 437: 336:Yellowknife 202: 170: 166: 156: 140: 129: 98: 71: 64: 32: 31: 3129:: 323–338. 2959:: 151–165. 1728:: T41C–01. 1454:Geosciences 1261:(1): 1–18. 875:U-Pb dating 746:pyroclastic 712:abundance. 640:deformation 546:. When hot 538:. Reported 504:phenocrysts 500:porphyritic 352:2694.1±4.5 258:Marda Tank 247:Warrawoona 187:. However, 82:early Earth 44:Archean Eon 3164:Categories 1849:: 89–105. 1460:(7): 266. 1224:2018-12-02 1118:References 1094:weathering 1079:Limitation 1005:K-feldspar 946:Granitoid 855:rock units 839:turbidites 748:deposits ( 696:73.0–73.6 682:72.2–73.0 632:deposition 562:Flow bands 472:oligoclase 408:Barberton 386:2615 ± 28 325:Greenland 302:Ilomantsi 272:Australia 253:Australia 189:ultramafic 153:Occurrence 143:granitoids 3151:0301-9268 3097:131343174 3089:0010-7999 3011:0091-7613 2928:0377-0273 2880:0377-0273 2832:128813711 2824:0010-7999 2781:0301-9268 2725:221544061 2667:0012-821X 2620:0899-5362 2574:0008-4077 2531:0008-4077 2485:0301-9268 2436:0008-4077 2388:0301-9268 2314:0009-2541 2267:0012-821X 2208:0301-9268 2186:: 55–76. 2155:0301-9268 2112:0037-0738 2073:961300385 2040:0040-1951 1994:0301-9268 1946:0301-9268 1881:0301-9268 1821:1342-937X 1799:: 38–66. 1704:0008-4077 1657:0301-9268 1601:0301-9268 1554:1674-9871 1484:2076-3263 1432:0301-9268 1363:0009-2541 1285:0305-8719 1200:0022-3530 1139:(Thesis). 994:Monzonite 976:amphibole 916:Monzonite 825:Lava dome 813:Lava flow 797:lava dome 791:lava flow 718:zirconium 702:Rhyolite 608:Magnesium 540:eutaxitic 496:aphanitic 492:muscovite 476:amphibole 405:3445 ± 3 395:Zimbabwe 369:2696 ± 2 316:3710 ± 4 299:2754 ± 6 280:2677 ± 2 261:2734 ± 3 244:3468 ± 2 227:Age (Ma) 105:submarine 94:komatiite 2675:11538384 1774:33104147 1101:See also 934:scale. 932:cratonic 881:. Since 818:Effusive 699:7.0–8.0 685:6.4–6.8 679:Archean 669:O (wt%) 573:quenches 480:chlorite 464:feldspar 452:feldspar 355:Abitibi 308:Finland 113:rhyolite 3131:Bibcode 3069:Bibcode 2991:Bibcode 2983:Geology 2908:Bibcode 2860:Bibcode 2804:Bibcode 2761:Bibcode 2647:Bibcode 2600:Bibcode 2554:Bibcode 2511:Bibcode 2463:Bibcode 2416:Bibcode 2368:Bibcode 2294:Bibcode 2247:Bibcode 2224:103-131 2188:Bibcode 2135:Bibcode 2092:Bibcode 2020:Bibcode 1974:Bibcode 1926:Bibcode 1851:Bibcode 1801:Bibcode 1730:Bibcode 1684:Bibcode 1637:Bibcode 1581:Bibcode 1462:Bibcode 1412:Bibcode 1335:Bibcode 1263:Bibcode 1180:Bibcode 1064:erosion 998:Syenite 990:Granite 920:Syenite 912:Granite 853:of the 807:breccia 788:Felsic 750:clastic 742:in situ 740:formed 716:, like 490:and/or 488:biotite 389:Harare 378:Canada 361:Canada 342:Canada 233:Craton 209:erosion 159:cratons 141:Felsic 136:cratons 3149:  3095:  3087:  3043:  3009:  2926:  2878:  2830:  2822:  2779:  2723:  2713:  2673:  2665:  2618:  2572:  2529:  2483:  2434:  2386:  2312:  2265:  2206:  2153:  2110:  2071:  2061:  2038:  1992:  1944:  1879:  1819:  1772:  1762:  1702:  1655:  1599:  1552:  1482:  1430:  1361:  1283:  1198:  1088:crust. 1000:(GMS) 972:garnet 963:(TTG) 891:basalt 887:silica 754:tephra 710:zircon 658:(wt%) 620:silica 581:glassy 556:welded 548:pumice 544:fiamme 524:tephra 468:albite 460:quartz 456:quartz 444:silica 440:felsic 291:India 109:dacite 90:basalt 52:silica 48:felsic 37:felsic 3093:S2CID 2828:S2CID 1839:(PDF) 1018:mafic 883:mafic 758:magma 651:Time 604:magma 484:micas 372:Wawa 319:Isua 193:mafic 86:mafic 3147:ISSN 3085:ISSN 3041:ISBN 3007:ISSN 2924:ISSN 2876:ISSN 2820:ISSN 2777:ISSN 2721:OCLC 2711:ISBN 2671:PMID 2663:ISSN 2616:ISSN 2570:ISSN 2527:ISSN 2481:ISSN 2432:ISSN 2384:ISSN 2310:ISSN 2263:ISSN 2204:ISSN 2151:ISSN 2108:ISSN 2069:OCLC 2059:ISBN 2036:ISSN 1990:ISSN 1942:ISSN 1877:ISSN 1817:ISSN 1770:OCLC 1760:ISBN 1726:2004 1700:ISSN 1653:ISSN 1597:ISSN 1550:ISSN 1480:ISSN 1428:ISSN 1359:ISSN 1281:ISSN 1196:ISSN 1067:GMS. 877:and 869:The 794:and 724:and 622:(SiO 612:iron 610:and 554:and 534:and 520:tuff 482:) + 474:) + 454:and 446:(SiO 191:and 123:and 111:and 92:and 35:are 3139:doi 3127:268 3077:doi 3065:154 3033:doi 2999:doi 2961:doi 2916:doi 2868:doi 2812:doi 2769:doi 2655:doi 2643:103 2608:doi 2562:doi 2519:doi 2471:doi 2459:115 2424:doi 2376:doi 2339:doi 2302:doi 2290:141 2255:doi 2243:240 2196:doi 2184:227 2143:doi 2100:doi 2028:doi 2016:415 1982:doi 1934:doi 1867:hdl 1859:doi 1847:283 1809:doi 1692:doi 1645:doi 1589:doi 1577:177 1540:doi 1470:doi 1420:doi 1351:hdl 1343:doi 1331:104 1271:doi 1259:449 1188:doi 665:O+K 654:SiO 634:or 628:wt% 602:of 183:of 3166:: 3145:. 3137:. 3125:. 3121:. 3105:^ 3091:. 3083:. 3075:. 3063:. 3039:, 3019:^ 3005:. 2997:. 2987:45 2985:. 2936:^ 2922:. 2914:. 2904:23 2902:. 2888:^ 2874:. 2866:. 2856:54 2854:. 2840:^ 2826:. 2818:. 2810:. 2800:70 2798:. 2775:. 2767:. 2757:12 2755:. 2733:^ 2719:. 2683:^ 2669:. 2661:. 2653:. 2641:. 2628:^ 2614:. 2606:. 2594:. 2582:^ 2568:. 2560:. 2550:19 2548:. 2525:. 2517:. 2507:24 2505:. 2493:^ 2479:. 2469:. 2457:. 2453:. 2430:. 2422:. 2412:23 2410:. 2396:^ 2382:. 2374:. 2364:10 2362:. 2322:^ 2308:. 2300:. 2288:. 2275:^ 2261:. 2253:. 2241:. 2229:^ 2216:^ 2202:. 2194:. 2182:. 2149:. 2141:. 2129:. 2106:. 2098:. 2067:. 2034:. 2026:. 2014:. 2002:^ 1988:. 1980:. 1970:60 1968:. 1954:^ 1940:. 1932:. 1922:44 1920:. 1889:^ 1875:. 1865:. 1857:. 1845:. 1841:. 1815:. 1807:. 1797:50 1795:. 1782:^ 1768:. 1742:^ 1724:. 1712:^ 1698:. 1690:. 1680:25 1678:. 1665:^ 1651:. 1643:. 1633:56 1631:. 1609:^ 1595:. 1587:. 1575:. 1562:^ 1548:. 1534:. 1530:. 1492:^ 1478:. 1468:. 1456:. 1452:. 1440:^ 1426:. 1418:. 1408:12 1406:. 1371:^ 1357:. 1349:. 1341:. 1329:. 1293:^ 1279:. 1269:. 1257:. 1253:. 1233:^ 1217:. 1194:. 1186:. 1176:27 1174:. 1154:^ 1125:^ 1025:. 974:+ 969:+ 841:. 809:. 728:. 661:Na 642:. 586:. 530:, 462:+ 215:. 119:, 69:. 3153:. 3141:: 3133:: 3099:. 3079:: 3071:: 3035:: 3013:. 3001:: 2993:: 2969:. 2963:: 2930:. 2918:: 2910:: 2882:. 2870:: 2862:: 2834:. 2814:: 2806:: 2783:. 2771:: 2763:: 2727:. 2677:. 2657:: 2649:: 2622:. 2610:: 2602:: 2596:7 2576:. 2564:: 2556:: 2533:. 2521:: 2513:: 2487:. 2473:: 2465:: 2438:. 2426:: 2418:: 2390:. 2378:: 2370:: 2347:. 2341:: 2316:. 2304:: 2296:: 2269:. 2257:: 2249:: 2210:. 2198:: 2190:: 2157:. 2145:: 2137:: 2131:3 2114:. 2102:: 2094:: 2075:. 2042:. 2030:: 2022:: 1996:. 1984:: 1976:: 1948:. 1936:: 1928:: 1883:. 1869:: 1861:: 1853:: 1823:. 1811:: 1803:: 1776:. 1736:. 1732:: 1706:. 1694:: 1686:: 1659:. 1647:: 1639:: 1603:. 1591:: 1583:: 1556:. 1542:: 1536:9 1486:. 1472:: 1464:: 1458:8 1434:. 1422:: 1414:: 1365:. 1353:: 1345:: 1337:: 1287:. 1273:: 1265:: 1227:. 1202:. 1190:: 1182:: 996:- 992:- 918:- 914:- 667:2 663:2 656:2 624:2 486:( 478:( 470:/ 466:( 448:2

Index


volcano-sedimentary sequence
felsic
volcanic rocks
Archean Eon
felsic
silica
~4.5 billion year ago
volcanic activities
plate tectonics
greenstone belts
sequences of volcanic-sedimentary rocks
early Earth
mafic
basalt
komatiite
volcanic activities
submarine
dacite
rhyolite
mineral assemblages
rock chemistry
rock layer relationship
date the timing of geological events
cratons
granitoids
Tonalite-trondhjemite-granodiorite
cratons
plate tectonics
supracrustal rocks

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.