冈底斯中段格达地区典中组火山岩锆石U-Pb年龄和地球化学特征

doi:10.19388/j.zgdzdc.2022.03.08

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Abstract The Linzizong Group volcanic rocks are widespread in the southern part of the Qinghai-Tibet Plateau and the geological information of the Neo-Tethys subduction and the collision of Indian-Asian plate was recorded in those volcanic rocks. The LA-ICP-MS U-Pb isotope dating of zircon and geochemical characteristics of whole rocks were studied to investigate the formation age, magma source and tectonic environment in the Dianzhong Formation of the Geda area in middle of the Gangdise. The ages of LA-ICP-MS U-Pb dating of zircon from the volcanic rocks of Dianzhong Formation is (61.6±1.0) Ma. These volcanic rocks are charactered by rich LILE and LREE, and poor HFSE, with typical island arc characteristic. These volcanic rocks were mainly derived from the partial melting of crustal material, which were the formed in an island arc environment during the northward subduction of the Neo-Tethys ocean.

Key words： Geda area Dianzhong Formation Zircon U-Pb age geochemical characteristics

Received: 13 January 2021

ZTFLH:	P588.124
	P597.3

Fund:中国地质调查局“冈底斯—喜马拉雅铜矿资源基地调查(编号: DD20160015)”项目资助

Corresponding Authors: 荣峰(1971—),男,高级工程师,从事基础地质调查研究工作。Email: 839270993@qq.com。

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	ZHOU Peng
	RONG Feng
	ZHOU Lianhe
	LIU Gongxi
	FAN Yuan
	Wan Zhongyan
	NIMA Luozhuo

Cite this article:

ZHOU Peng,RONG Feng,ZHOU Lianhe, et al. Zircon U-Pb age and geochemical characteristics of the volcanic rocks in the Dianzhong Formation of the Geda area in the middle of the Gangdise[J]. , 2022, 9(3): 76-86.

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http://journal25.magtechjournal.com/Jwk_dzdc/EN/10.19388/j.zgdzdc.2022.03.08 OR http://journal25.magtechjournal.com/Jwk_dzdc/EN/Y2022/V9/I3/76

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