Formation and evolution of lower crustal granulite terrane in the southern North China Craton

被引:1
|
作者
Wang JingLi [1 ]
Zhang HongFu [2 ]
机构
[1] Yanan Univ, Sch Petr Engn & Environm Engn, Yanan 716000, Peoples R China
[2] Zhejiang Univ, Sch Earth Sci, Hangzhou 310058, Peoples R China
关键词
Tectono-magmatic event; Taihua complex; Granulite terrane; Continental lower crustal; Southern North China Craton; PALEOPROTEROZOIC TECTONIC EVOLUTION; HIGH-PRESSURE GRANULITES; PB ZIRCON GEOCHRONOLOGY; U-PB; METAMORPHIC EVOLUTION; CONTINENTAL-CRUST; TAIHUA COMPLEX; SANGGAN AREA; MARGIN; OROGEN;
D O I
10.18654/1000-0569/2022.12.18
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Studies focused on the tectono-magmatic events and subsequent metamorphism for the Precambrian terranes are crucial for revealing the growth and evolution of early continental crust. Although many studies have been conducted, the petrogenesis and the corresponding tectonic settings for the Precambrian metamorphic rocks in the southern margin of North China Craton (NCC) are still debated, which has limited our understanding on the formation and evolution of the NCC. In this contribution, data from our published and forthcoming research results on the whole rock trace element, in-situ zircon Pb isotope and geochronology analyses of the Taihua complex in Lushan area were synthetically analyzed, combined with previous studies including the petrography, geochemistry, geochronology and metamorphic P-T-t path, with the aim to elaborate the composition, petrogenesis and multi-stage tectono-thermal events for the Neoarchean and Paleoproterozoic crust in the southern margin of NCC. The results reveal two important crustal growth events at 2. 92 similar to 2. 71Ga and 2. 53 similar to 2. 45Ga, juvenile crustal reworking and recycling at 2. 35 similar to 2. 30Ga and 2. 19 similar to 2. 06Ga, and Paleoproterozoic metamorphism at 1. 96 similar to 1. 84Ga. Together with reported P-T path and metamorphic geochronology in the central and northern part of Trans-North China Orogen, we inferred that the Paleoproterozoic collision between the Eastern Block and Western Block of the NCC started as early as similar to 1. 96Ga and lasted until 1. 86Ga, corresponding to a long-lived tectono-metamorphic event.
引用
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页码:3819 / 3834
页数:16
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