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Petrogenesis of the MORB type high-pressure mafic granulite from the Huai' an complex in North China Craton and its tectonic implications

文献类型：期刊论文

作者Zhang JiaHui1,2,3; Wang HuiChu2,3; Tian Hui2,3; Ren YunWei2,3; Chang QingSong2,3; Shi JianRong2,3; Xiang ZhenQun2,3
刊名ACTA PETROLOGICA SINICA
出版日期2019
卷号35期号:11页码:3506-3528
关键词High-pressure mafic granulite MORB Paleoproterozoic Orogeny Huai' an complex North China Craton
ISSN号1000-0569
DOI10.18654/1000-0569/2019.11.16
英文摘要The Paleoproterozoic is an important era in the tectonic evolution of North China Craton. Several collisional orogenic belts have been recognized, but their tectonic boundaries, temporal evolution and geodynamic process are still controversial. This contribution reports a new supracrustal rock association which consists of high-pressure mafic granulite, marble and aluminium-rich gneiss in the Huai' an complex. The protolith rock is a set of basic volcanic rocks-carbonate-sand/mudstone. The high-pressure mafic granulite has a typical mineral assemblage of high-pressure granulite facies, and recorded a granulite-amphibolite facies retrograde metamorphism. Geochemical studies show that the original rock of the high-pressure mafic granulite is a sub-alkaline tholeiite with a nearly flat rare earth pattern ((La/Yb) (N) = 1. 35 similar to 1. 79) , light rare earth element (LREE) depleted ((La/Sm) (N) = 0. 83 similar to 1. 13) , and shows weakly positive Eu anomalies (delta Eu = 1. 0 similar to 1. 22) and markedly negative anomalies in Na-Ta, which has similar geochemical characteristics as mid-ocean ridge basalt (MORB). Their rock association and occurrence characteristics are significantly different from the dyke-type high-pressure basic granulite with island arc basalt properties which widely distributed in the border area of Shanxi, Hebei and Inner Mongolia provinces. The high-pressure mafic granulite display positive zircon epsilon(Hf) (t) values (+ 2. 6 similar to +11. 5) with model ages of 2065 similar to 2250 Ma, and which may be derived from the shallow mantle source of the spinet stability domain. This supracrustal rock association is probably a paleo-oceanic remnant. SHRIMP U-Pb dating results and Hf isotope studies indicate that age of the protolith of high-pressure granulite may be 2. 15 similar to 2. 2Ga, similar to 1. 95 Ga represents the peak age of the high-pressure granulite facies metamorphism, and 1. 83 similar to 1. 82Ga is the timing of granulite facies retrograde metamorphism and decompression melting. This study shows that the supracrustal rock association recorded Paleoproterozoic orogenic tectonic evolution processes of subduction-collision-exhumation, and which can provide evidences for restoration the early tectonic setting of the Paleoproterozoic orogenic belt.
WOS关键词U-PB AGES ; ISUA GREENSTONE-BELT ; ZIRCON GEOCHRONOLOGY ; SUPRACRUSTAL ROCKS ; CRUSTAL EVOLUTION ; ANSHAN AREA ; METAMORPHIC EVOLUTION ; PELITIC GRANULITES ; JORMUA OPHIOLITE ; OCEANIC-CRUST
WOS研究方向Geology
语种英语
WOS记录号WOS:000510188200016
出版者SCIENCE PRESS
源URL[http://ir.iggcas.ac.cn/handle/132A11/95669]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Zhang JiaHui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.China Geol Survey, Tianjin Ctr, Tianjin 300170, Peoples R China
3.China Geol Survey, Precambrain Geol Res Ctr, Tianjin 300170, Peoples R China
推荐引用方式
GB/T 7714		 Zhang JiaHui,Wang HuiChu,Tian Hui,et al. Petrogenesis of the MORB type high-pressure mafic granulite from the Huai' an complex in North China Craton and its tectonic implications[J]. ACTA PETROLOGICA SINICA,2019,35(11):3506-3528.
APA Zhang JiaHui.,Wang HuiChu.,Tian Hui.,Ren YunWei.,Chang QingSong.,...&Xiang ZhenQun.(2019).Petrogenesis of the MORB type high-pressure mafic granulite from the Huai' an complex in North China Craton and its tectonic implications.ACTA PETROLOGICA SINICA,35(11),3506-3528.
MLA Zhang JiaHui,et al."Petrogenesis of the MORB type high-pressure mafic granulite from the Huai' an complex in North China Craton and its tectonic implications".ACTA PETROLOGICA SINICA 35.11(2019):3506-3528.

入库方式： OAI收割

来源：地质与地球物理研究所

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