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Himalayan Leucogranites: A Geochemical Perspective
ElementsThe geochemical characterization of Himalayan leucogranites offers important insights into both their petrogenesis and Himalayan orogenic processes. Himalayan leucogranites are characterized by strongly peraluminous compositions that are comparable to melts derived from anatexis of sedimentary rocks.
Ze-Zhou Wang +3 more
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Highly fractionated Himalayan leucogranites and associated rare-metal mineralization
Lithos, 2020Abstract The formation of the Himalaya was associated with the exhumation of high-grade metamorphosed rocks of the Higher Himalayan sequence (HHS) complex, which underwent amphibolite-, granulite- to eclogite-facies metamorphism and anatexis. Occurring along the Himalayan mountain crest in the south and the Lhagoi Kangri mountain in the north, the ...
Fu-Yuan Wu +10 more
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Journal of Volcanology and Geothermal Research, 1990
Abstract Two types of leucogranite have been identified in a collisional setting in the Himalaya. Type-a (e.g., Manaslu, High Himalaya) are syn-tectonic crustal melts related to “hot over cold” thrusting and subsequent fluid fluxing. Type-b (e.g., Baltoro, Karakoram) is related to lower crustal melting during/following crustal thickening and thermal ...
Mark B. Crawford, Brian F. Windley
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Abstract Two types of leucogranite have been identified in a collisional setting in the Himalaya. Type-a (e.g., Manaslu, High Himalaya) are syn-tectonic crustal melts related to “hot over cold” thrusting and subsequent fluid fluxing. Type-b (e.g., Baltoro, Karakoram) is related to lower crustal melting during/following crustal thickening and thermal ...
Mark B. Crawford, Brian F. Windley
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Petrogenesis of leucogranites in collisional orogens
Geological Society, London, Special Publications, 2019Abstract Leucogranites are a characteristic feature of collisional orogens. Their generation is intimately related to crustal thickening and the active deformation and metamorphism of metapelites. Data from Proterozoic to present day orogenic belts show that collisional leucogranites (CLGs) are peraluminous, with muscovite ...
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Late Vendian postcollisional leucogranites of Yenisei Ridge
Doklady Earth Sciences, 2017The Late Vendian (540–550 Ma) U–Pb zircon age of postcollisional granitoids in the Osinovka Massif was obtained for the first time. The Osinovka Massif is located in rocks of the island-arc complex of the Isakovka Terrane, in the northwestern part of the Sayany–Yenisei accretion belt. These events stand for the final stage of the Neoproterozoic history
A. D. Nozhkin +7 more
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Granites, Leucogranites, Himalayan Leucogranites…
ElementsPREFACE I am not an expert on Himalayan leucogranites, although I have followed their coverage in the literature for more than 40 years and have studied granites and rhyolites more generally for over 50 years (cf. Fig. 1). Coming from this perspective, I aim—in this Elements Perspective—to provide a felsic magma context for pondering ...
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Himalayan Leucogranites: Field Relationships and Tectonics
ElementsHimalayan peraluminous leucogranites were derived from in-situ melting of sillimanite + K-feldspar-bearing pelite-migmatite, and were transported via layer-parallel sill complexes and cross-cutting dykes to feed giant sills up to 5 km thick. Partially melted Himalayan middle crust was extruded southwards between two large-scale, north-dipping ...
Mike Searle, John Cottle
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Lithogeochemical exploration for uranium in leucogranites
Journal of Geochemical Exploration, 1989Abstract In certain leucogranitic massifs in France and Spain, anomalies of uranium that extend for kilometers have been observed in rocks close to uranium deposits. Some of these anomalies were used to direct a reconnaissance survey which led to the discovery of a small blind deposit.
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Himalayan Leucogranites: A Minimal Role in Deformation
ElementsA popular model of Himalayan metamorphic and structural evolution argues that partial melting of deeply buried rocks triggered crustal weakening, ductile flow, orogenic collapse, and genesis of leucogranites. Here, we review the origins and evolution of partial melts and leucogranites to demonstrate that they are largely incidental to deformation ...
Matthew J. Kohn +2 more
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Lithium-bearing phosphates and micas in Homolka leucogranite
Geoscience Research Reports, 2022Homolka granite forms intrusion of highly fractionated leucocratic magma which belongs to the youngest members of the Moldanubian Pluton. The age of the intrusion was estimated between 319 and 315 Ma. The Homolka granite is P-rich, peraluminous and strongly enriched in Li, Rb, Cs, Sn, Nb, Ta and F, showing high U (8–20 ppm) and low Th (< 3 ppm ...
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