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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 Adirondack Mountains are characterized by three major events that took place during the interval ca. 1350-1000 Ma as discussed by the authors, and the earliest of these is the arc-related Elzevirian Orogeny (ca.1350-1185 Ma) during which substantial volumes of juvenile calc-alkaline crust were added to the Adyrondacks as well as to the northwest segment of the Central Metasedimentary Belt.
228 citations
TL;DR: In this paper, the authors used LA-ICPMS zircon U-Pb dating, whole-rock elements and Nd-Sr isotopes, and mineral O isotopes for metamorphic rocks from the Jiaobei terrane.
227 citations
TL;DR: In this article, liquid inclusions in quartz found in rocks of amphibolite and granulite facies were studied in the presence of CO2 (probably juvenile) and gave values (800°C, 8 kb) comparable to those obtained by the petrological study (7-800 °C, 6-8 kb).
227 citations
Journal Article•
TL;DR: In this paper, the authors presented a metamorphic evolution map of the North China Craton, which can be better used to reflect the evolution history of different tectonic units in the craton.
Abstract: The basement of the North China Craton consists of three micro-continental blocks (Eastern Block, Yinshan Block and Ordos Block) and three Paleoproterozoic mobile belts ( Khondalite Belt, Trans-North China Orogen and Jiao-Liao-Ji Belt) These tectonic units are distinctly different in metamorphic time and P-T evolution Metamorphism of the Late Archean basement rocks in the Eastern and Yinshan Blocks occurred at ～2 5Ga, characterized by anticlockwise P-T paths involving isobaric cooling, suggesting the origin of the metamorphism related to the underplating of numerous mantle-derived magmas The major metamorphic event of the Khondalite Belt occurred at ～195Ga, and its metamorphic evolution is characterized by clockwise P-T paths involving near-isothermal decompression, which is interpreted as a result of collision between the Yinshan and Ordos Block to form the Western Block The metamorphism of the Trans-North China Orogen occurred at ～185Ga, and is also characterized by clockwise P-T paths involving near-isothermal decompression, reflecting the final amalgamation of the united Western Block and the Eastern Block to form the coherent basement of the North China Craton The metamorphism of the Paleoproterozoic Jiao-Liao-Ji Belt is featured by paired metamorphic zones of which the northwestern zone consists of the North Liaohe, Lading and Fenzishan groups, metamorphism of which is characterized by medium-pressure-type clockwise P-T paths, whereas the southeastern zone consists of the South Liaohe, Ji'an and Jingshan groups, metamorphism of which is characterized by low-pressure-type anticlockwise P-T paths Compared with the traditional 1 : 4,000,000 metamorphic map of China published in 1986, the newly compiled metamorphic evolution map of the North China Craton can be better used to reflect metamorphic histories of different tectonic units in the craton Although magmatic arc, continental rifting and mantle plume models can all be applied to interpretations of the metamorphism of the Eastern Block with IBC-type anticlockwise P-T paths, a mantle plume model is favored because it can reasonably explain the presence of an 800km wide igneous province in which all rocks were nearly simultaneously emplaced at 260～250Ga, numerous komatiites or komatiitic rocks, biomodal volcanic rocks, domiform structures, etc In the North China Craton, the exposures of typical high-pressure basic granulites with garnet-clinopyroxen-plagioclase-quartz assemblage and high-pressure pelitic granulites with kyanite-Kf-feldspar assemblage are only restricted to the northern segment of the Trans-North China Orogen and the southern segment of the Jiao-Liao-Ji Belt, and their formation was related to subduction and collision operative in these Paleoproterozoic mobile belts The local ultrahigh temperature (UHT) metamorphism with anticlockwise P-T paths in the Khondalite Belt, represented by sapphirine granulites in the Daqingshan and Jining Complexes, most likely resulted from underplating of mantle-derived magmas during the post-collisional extension at ～192Ga, as indicated by the sapphirine granulites which are always in direct contact with ～192Ga basic dykes
226 citations
TL;DR: The Fuping Complex as discussed by the authors comprises three major lithological assemblages: the ∼2.50 Ga trondhjemite-tonalite-granodiorite (TTG) gneisses, the Wanzi paragneisses and the 2.02 Ga Nanying granitic gneises.
222 citations