Topic
Granulite
About: Granulite is a research topic. Over the lifetime, 6763 publications have been published within this topic receiving 268925 citations.
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148 citations
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TL;DR: In this article, three Archaean gneissic complexes (Bonfim, Belo Horizonte and Campo Belo) in the southern part of the Sao Francisco craton were studied by means of UPb (zircon and titanite, monazite) and SmNd, RbSr and Pb-Pb(whole rock) methods.
147 citations
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TL;DR: In this article, the age and kinematics of the Pogallo Ductile Fault Zone are consistent with the occurrence of Early Mesozoic extensional basins in the Southern Alpine sediments.
147 citations
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TL;DR: In this article, the authors show that the Lhasa terrane has undergone two stages of medium-P metamorphism: an early granulite facies event at c. 90 ǫ ma and a late amphibolite facie event at 36-33 ǔ ma.
Abstract: The eastern Himalayan syntaxis in southeastern Tibet consists of the Lhasa terrane, High Himalayan rocks and Indus-Tsangpo suture zone. The Lhasa terrane constitutes the hangingwall of a subduction zone, whereas the High Himalayan rocks represent the subducted Indian continent. Our petrological and geochronological data reveal that the Lhasa terrane has undergone two stages of medium-P metamorphism: an early granulite facies event at c. 90 Ma and a late amphibolite facies event at 36–33 Ma. However, the High Himalayan rocks experienced only a single high-P granulite facies metamorphic event at 37–32 Ma. It is inferred that the Late Cretaceous (c. 90 Ma) medium-P metamorphism of the southern Lhasa terrane resulted from a northward subduction of the Neo-Tethyan ocean, and that the Oligocene (37–32 Ma) high-P (1.8–1.4 GPa) rocks of the High Himalayan and coeval medium-P (0.8–1.1 GPa) rocks of the Lhasa terrane represent paired metamorphic belts that resulted from the northward subduction of the Indian continent beneath Asia. Our results provide robust constraints on the Mesozoic and Cenozoic tectonic evolution of south Tibet.
147 citations
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TL;DR: A combination of cathodoluminescence studies and U-Pb sensitive high-resolution ion microprobe dating of distinct magmatic and metamorphic zircon domains constitutes a powerful tool to decipher the geological history of complex metamorphics terranes.
147 citations