Results 131 to 140 of about 199 (173)
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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: Rare-metal Resources
ElementsHimalayan leucogranites were once overlooked for rare-metal resources because they initially were thought to have formed by in-situ partial melting of underlying high-grade metamorphic rocks. However, recent findings have revealed widespread rare-metal mineralizations of Be, Nb/Ta, Li/Rb/Cs, and W/Sn associated with leucogranites in the area ...
Fu-Yuan Wu +4 more
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The Canadian Mineralogist, 2012
Spatial relations and bulk chemical compositions of three bodies of multiphase leucogranites and two categories of granitic pegmatites in the Archean Red Cross Lake greenstone belt, Sachigo Subprovince of the Superior Province in the Canadian Shield, indicate a comagmatic origin and an enormous range of fractionation.
P. Cerny +8 more
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Spatial relations and bulk chemical compositions of three bodies of multiphase leucogranites and two categories of granitic pegmatites in the Archean Red Cross Lake greenstone belt, Sachigo Subprovince of the Superior Province in the Canadian Shield, indicate a comagmatic origin and an enormous range of fractionation.
P. Cerny +8 more
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Geochemical comparison between Himalayan and Hercynian leucogranites
Physics of the Earth and Planetary Interiors, 1984Abstract Isotopic (Sr, Pb, Nd, O), REE and trace element data from three Himalayan (Nepal) and six Hercynian (Brittany, France) leucogranites are compared. For the Himalayan granites—Makulu, Mustang and especially Manaslu—the 87Sr/86Sr versus 87Rb/86Sr scatter diagrams, and hence variability of the initial 87Sr/86Sr ratios, reflect heterogeneity of ...
Ph. Vidal +5 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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The role of fluids in the formation of High Himalayan leucogranites
Geological Society, London, Special Publications, 1993Abstract During fractional melting of the crust, the availability of fluids is a critical variable that influences the melt fraction obtained, the capacity of the melt to migrate from its source and the relationship between melting and uplift.
Nigel Harris, John Massey, Simon Inger
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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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The Formation and Age of Leucogranitic Melt in the Garhwal Himalaya
2023Metamorphism during orogenic evolution results in the melting of high-grade metamorphic rocks which dramatically decreases mechanical strength, activates shear zones, and may consequently initiate exhumation. The timescales of anatexis, melt amalgamation, migration, and emplacement are the focus of active research and have critical implications for ...
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Emplacement age of leucogranite in the Kampa Dome, southern Tibet
Tectonophysics, 2016Abstract Himalayan leucogranite is an important rock to decipher the orogenic evolution of the Himalayan orogen. It has been recognized that the leucogranite occurred as two separate, but parallel belts within Himalaya. Leucogranite in the north belt is mainly exposed an intrusion component within the gneissic dome.
Xiao-Chi Liu +5 more
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