Discovery of pelitic high-pressure granulite from Manjinggou of the Huai'an Complex, North China Craton: Metamorphic P-T evolution and geological implications

doi:10.1016/j.precamres.2016.03.001

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Discovery of pelitic high-pressure granulite from Manjinggou of the Huai'an Complex, North China Craton: Metamorphic P-T evolution and geological implications
	Wu, Jia-Lin 1; Zhang, Hua-Feng 2; Zhai, Ming-Guo 1,3; Guo, Jing-Hui 3; Liu, Liang 1; Yang, Wen-Qiang 1; Wang, Hao-Zheng 3; Zhao, Lei 3; Jia, Xiao-Liang 1; Wang, Wei 4
刊名	PRECAMBRIAN RESEARCH
	2016-06-01
卷号	278 页码:323-336
关键词	Pelitic and mafic high-pressure granulites Manjingou North China Craton Metamorphic evolution Paleoproterozoic
DOI	10.1016/j.precamres.2016.03.001
文献子类	Article
英文摘要	The first report of Paleoproterozoic mafic high-pressure (HP) granulite terranes in Manjinggou area of the Huai'an Complex, North China Craton (NCC) since 1992 has attracted broad attention from geologists, and accordingly various Early Precambrian continent-continent collision or micro-blocks amalgamation hypotheses were suggested. However, one important issue is still controversial whether the pelitic granulites and associated mafic HP granulites underwent similar metamorphic history. Here we report newly recognized pelitic HP granulites in Manjinggou area of the Huai'an Complex to provide direct evidence that both pelitic and mafic HP granulites suffered similar metamorphic history. The metamorphic peak mineral assemblage of the pelitic granulites is characterized by Grt-Ky-Kfs-Bt-Rt-Qz-Liq Ms, and the subsequent medium-pressure (MP) granulite fades retrogression is characterized by Grt-Sil-Kfs-PI-Bt-Rt-Liq-Qz. Pseudosection approaches were undertaken in the Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O-TiO2-O (NCKFMASHTO) system to account for textural development, mineral composition and P-T evolution of the pelitic granulites. The estimated peak and retrograde granulite facies conditions are 11.5-15 kbar, 810-860 degrees C and 9.5 kbar, similar to 850 degrees C, respectively, comparable with those of associated mafic HP granulites. Consistently, field geological observations and available geochronological data also indicate their similar deformation and metamorphic history from HP granulite facies stage (similar to 1.96-1.90 Ga) to retrograde stages (similar to 1.88-1.80 Ga). This finding changes previous views that the pelitic rocks and associated mafic granulites are different slabs with individual metamorphic history. The khondalite series from the Huai'an Complex and adjacent Ji'ning Complex were probably experienced HP granulite facies metamorphism, but previously derived MP granulite facies conditions might be attributed to mineral re-equilibrium due to long dwell time under MP granulite fades. Additionally, these granulite facies rocks record high apparent geothermal gradients and slow exhumation rates relative to HP-UHP rocks in the Phanerozoic continental collisional orogens. It seems to indicate that the thermal regimes and tectonic mechanisms of Paleoproterozoic probably differ from those of Phanerozoic eons, and these HT-HP granulite terranes from the NCC were likely formed in a hot and slow cooling orogen. (C) 2016 Published by Elsevier B.V.
WOS关键词	MINERAL EQUILIBRIA CALCULATIONS ; PARTIAL MELTING EQUILIBRIA ; SYSTEM K2O-FEO-MGO-AL2O3-SIO2-H2O-TIO2-FE2O3 ; PETROLOGICAL INTEREST ; ZIRCON GEOCHRONOLOGY ; MAFIC GRANULITES ; TECTONIC HISTORY ; INNER-MONGOLIA ; SANGGAN AREA ; GARNET
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000375812000018
资助机构	973 program - State Ministry of Science and Technology(2012CB4166006) ; 973 program - State Ministry of Science and Technology(2012CB4166006) ; National Natural Science Foundation of China(41530208) ; National Natural Science Foundation of China(41530208) ; 973 program - State Ministry of Science and Technology(2012CB4166006) ; 973 program - State Ministry of Science and Technology(2012CB4166006) ; National Natural Science Foundation of China(41530208) ; National Natural Science Foundation of China(41530208)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53521]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Northern Taibai Str 229, Xian 710069, Peoples R China 2.China Univ Geosci, Sch Earth Sci & Resources, Xueyuan Rd 29, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Chinese Acad Geol Sci, Inst Geol, 26 Baiwanzhuang Rd, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Wu, Jia-Lin,Zhang, Hua-Feng,Zhai, Ming-Guo,et al. Discovery of pelitic high-pressure granulite from Manjinggou of the Huai'an Complex, North China Craton: Metamorphic P-T evolution and geological implications[J]. PRECAMBRIAN RESEARCH,2016,278:323-336.
APA	Wu, Jia-Lin.,Zhang, Hua-Feng.,Zhai, Ming-Guo.,Guo, Jing-Hui.,Liu, Liang.,...&Wang, Wei.(2016).Discovery of pelitic high-pressure granulite from Manjinggou of the Huai'an Complex, North China Craton: Metamorphic P-T evolution and geological implications.PRECAMBRIAN RESEARCH,278,323-336.
MLA	Wu, Jia-Lin,et al."Discovery of pelitic high-pressure granulite from Manjinggou of the Huai'an Complex, North China Craton: Metamorphic P-T evolution and geological implications".PRECAMBRIAN RESEARCH 278(2016):323-336.