皖浙赣相邻区构造活动ESR测年、Ar-Ar测年及其构造年代学意义

doi:10.19388/j.zgdzdc.2022.06.04

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Abstract The tectonic position of adjacent areas in Zhejiang-Jiangxi-Anhui is located in the northern margin of the eastern section of Jiangnan orogenic belt, which have experienced multi-period tectonic movements, including Caledonian Period, Indochinese Period and Yanshanian Period. Fault belts with various orientation and different geological ages were formed during the tectonic movements, and the tectonic movement during Yanshanian Period is the most active. Based on the ESR dating, Ar-Ar dating and geological field investigation, the authors focus on the tectonic activity characteristics in the Late Yanshania. The Ar-Ar dating in Dongyuan deposit area is (113.5±1.1) Ma, and ESR dating of quartz veins in the fault is distributed between 120 and 100 Ma, approximately (115±5) Ma. The ESR dating of quartz veins in the fault of Tongcun rock mass and surrounding rock of Shichangwu Formation in Late Ordovician is distributed between 120.2 and 100.4 Ma. Therefore, this research shows that a strong tectothermal event occurred in Late Yanshanian Period (120~100 Ma) and a tectonic reversal from extrusion to stretch occurred in late and middle Early Cretaceous.

Key words： Yanshanian movement ESR dating Ar-Ar dating adjacent areas in Anhui-Zhejiang-Jiangxi

Received: 19 July 2021

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	Articles by authors
	YANG Xinpeng
	LIU Beibei
	CHENG Zhou
	ZHENG Zongping
	DENG Ke
	HOU Dehua
	ZHANG Liguo

Cite this article:

YANG Xinpeng,LIU Beibei,CHENG Zhou, et al. ESR dating, Ar-Ar dating and its tectonic implications of tectonic activity in adjacent area of Anhui-Zhejiang-Jiangxi[J]. , 2022, 9(6): 23-32.

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http://journal25.magtechjournal.com/Jwk_dzdc/EN/10.19388/j.zgdzdc.2022.06.04 OR http://journal25.magtechjournal.com/Jwk_dzdc/EN/Y2022/V9/I6/23

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