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ratios of the leucogranite intrusives are distinct from that of the gneiss and associated leucosomes. This indicates the leucogranite melts were not derived from the local gneiss, however the gneiss is isotopically variable and the leucogranite could have derived from subjacent gneiss.
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Dehydration—Melting
Phenomena in Leptynitic Gneisses and the Generation of Leucogranites: a Case Study from the Kerala Khondalite Belt, Southern India,
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within the gneiss. This was followed by intrusion of the gneiss by garnet-bearing leucogranitic melts.
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Notice explicative, Carte géol. France (1/50 000), feuille Baie du mont-Saint-Michel (208)
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Petrologic and thermal constraints on the origin of leucogranites in collisional orogens,
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leucosomes (light colored segregations) within the gneiss showed the development of
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Transactions of the Royal
Society of Edinburgh: Earth Sciences, 95, 73–85, 2004
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155:, but the heat source is uncertain. Shear-heating associated with large
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169:, France is made of leucogranite, which solidified from an underground
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Igneous Rocks — A Classification and
Glossary of Terms (2nd edition)
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are interpreted to have been derived by partial melting of
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of molten magma about 525 million years ago during the
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Leucogranite (alaskite) from
Colorado, USA, containing
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Mineral
Resources, Online Spatial Data, Virginia, USGS
351:. Cambridge: Cambridge University Press. p. 51.
332:
Braun I., G.R. Ravindra Kumar, and M. Raithi, (1996)
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Journal of
Petrology, Vol. 37, No. 6, pp. 1285-1305
93:Leucogranites have been reported from a variety of
159:in the crust has been proposed as the mechanism.
151:. These melts result following deformation and
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220:. The study indicated localized melting or
208:Belt near Manali in south India found that
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147:rocks in the upper portions of thickened
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302:L'Homer, A.; et al. (1999).
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266:Peter I. Nabelek and Mian Liu,
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347:Le Maitre, R.W., ed. (2002).
289:Alkali feldspar leucogranite,
392:. You can help Knowledge by
311:(in French). Orléans: BRGM.
135:, and the currently active
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242:alkali feldspar granite.
139:orogeny. The leucogranite
86:containing almost no dark
124:of Proterozoic age), the
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384:This article related to
183:A study of sodium-rich
101:. Examples include the
99:continental collisions
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107:Trans-Hudson orogeny
78:is a light-colored,
67:Leucogranite of the
439:Ultrapotassic rocks
216:replacing the dark
129:Appalachian orogeny
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275:2015-10-06 at the
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55:Leucogranite from
39:potassium feldspar
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122:Grenville orogeny
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201:terrane in the
189:alkali feldspar
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76:Leucogranite
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24:Igneous rock
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17:Leucogranite
240:leucocratic
157:shear zones
111:Proterozoic
103:Black Hills
433:Categories
246:References
206:Khondalite
115:Blue Ridge
113:age), the
97:involving
71:, Virginia
386:petrology
226:Strontium
171:intrusion
137:Himalayan
126:Paleozoic
95:orogenies
273:Archived
236:Alaskite
175:Cambrian
167:Normandy
88:minerals
80:granitic
59:, France
229:isotope
218:biotite
210:in situ
193:biotite
145:pelitic
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214:garnet
203:Kerala
196:gneiss
185:quartz
178:period
141:magmas
57:Lozère
43:quartz
388:is a
309:(PDF)
149:crust
133:Maine
390:stub
353:ISBN
313:ISBN
41:and
238:is
165:in
131:in
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
