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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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TL;DR: The Mesozoic sediments in the Eastern North Pyrenean Zone have suffered a high temperature low pressure metamorphism which reached its climax before the major deformation event.
Abstract: The Mesozoic sediments in the Eastern North Pyrenean Zone have suffered a high temperature-low pressure metamorphism which reached its climax before the major deformation event. The mineral associations in pelitic rocks are consistent with temperatures of 500°–600°C and a maximum pressure of 3–4 kb. Post-metamorphic brittle deformation has disturbed the initial thermal pattern. The Albo-Cenomanian (98–87 Ma) metamorphism is related to thermal anomalies contemporaneous with the crustal thinning in the North Pyrenean Zone. The distribution of paleotemperatures suggests that the intensity of metamorphism may have been related to the magnitude of crustal attenuation. High-grade rocks are associated with lherzolites and granulites, whereas low-grade rocks are associated with higher-level crustal material (gneisses and micaschists). Crustal thinning and metamorphism developed during sinistral transcurrent displacement of Iberia with respect to Europe.

136 citations

Journal ArticleDOI
TL;DR: The Amiˆtsoq gneisses are depleted in Rb and U relative to those of Ameralik and Isua as discussed by the authors, indicating that this depletion, correlated with the granulite-facies metamorphism occurred ca. 3600 Ma ago.

135 citations

Journal Article
TL;DR: In this paper, the authors deal with several key issues including Paleoproterozoic sedimentary sequences, metamorphism and magmatic intrusion, and come to following primary suggestions for Proterozoian tectonic evolution of the North China Craton(NCC):
Abstract: This paper deals with several key issues including Paleoproterozoic sedimentary sequences,metamorphism and magmatic intrusion,and comes to following primary suggestions for Proterozoic tectonic evolution of the North China Craton(NCC):(1)The NCC fundamentally amalgamated by continent-continent,arc-continent or arc-arc collisions by~2500 Ma;The NCC behaved as a stable continent block without tectonic-thermal action during 2500~2300 Ma.(2)2300~1950 Ma mobile belts,such as Jinyuand Jiaoliao,formed and represent intracratonic orogenesis with Phanerozoic orogenic characteristics on some aspects.(3)The evolution of these mobile belts includes basin rifting,subduction and final collision at~1850 Ma.(4)A proposed northern mobile belt that was not preserved was located north of the Baiyan Obo.The khondalite sequences possibly represent a structural zone within craton,which was related to subduction and collision of the northern mobile belt and caused deep-level granulite facies rocks to uplift by sole- thrusting.(5)The Baiya Obo,Zhaertai and Huade sedimentary sequences deposed in passive continent marginal basins in 1800~1700 Ma,same as the Changcheng System.(6)The tectonic regime in the NCC was inverted from compression to extension in 1850~1700 Ma,resulting in rifting within craton,mafic dyke swarm emplacing and cratonic basement uplifting.(7)In the middle of northern margin of the NCC,an ultra-high-temperature metamorphic complex has been discovered.The paper also discusses genetic relationship between the ultra-high-temperature metamorphic rocks and high-pressure granulites in the central NCC,and suggests that they are related to a mantle upwelling and magma underplating event of~1900 Ma.

135 citations

Journal ArticleDOI
C-Y. Lan1
TL;DR: The Kontum massif, central Vietnam, consists mainly of high grade (amphibolite to granulite facies) metamorphic rocks and represents the largest basement exposure (core complex) of the Indochina block as mentioned in this paper.

135 citations

Journal ArticleDOI
TL;DR: In this paper, structural-petrologic and isotopic-geochronologic data on magmatic, metamorphic, and metasomatic rocks from the Chernorud zone were used to reproduce the multistage history of their exhumation to upper crustal levels.
Abstract: Structural-petrologic and isotopic-geochronologic data on magmatic, metamorphic, and metasomatic rocks from the Chernorud zone were used to reproduce the multistage history of their exhumation to upper crustal levels. The process is subdivided into four discrete stages, which corresponded to metamorphism to the granulite facies (500–490 Ma), metamorphism to the amphibolite facies (470–460 Ma), metamorphism to at least the epidote-amphibolite facies (440–430 Ma), and postmetamorphic events (410–400 Ma). The earliest two stages likely corresponded to the tectonic stacking of the backarc basin in response to the collision of the Siberian continent with the Eravninskaya island arc or the Barguzin microcontinent, a process that ended with the extensive generation of synmetamorphic granites. During the third and fourth stages, the granulites of the Chernorud nappe were successively exposed during intense tectonic motions along large deformation zones (Primorskii fault, collision lineament, and Orso Complex).

134 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023126
2022301
2021177
2020203
2019148
2018142