东昆仑造山带大水沟中酸性侵入岩的形成时代及岩石地球化学特征

doi:10.19388/j.zgdzdc.2018.01.08

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Abstract The authors investigated zircon U-Pb dating and petrological geochemical characteristics in the east of East Kunlun orogenic belt. The results show that the U-Pb age of zircons in tonalite is (402±2) Ma, belonging to Early Devonian of Variscan. The petrological geochemical characteristics show that the aluminium saturation A/CNK index ranges from 0.946 to 1.077, and the ratio of light rare earth elements and heavy rare earth elements (LREE/HREE) is from 2.94 to 18.93, which indicates the enrichment of light rare earth elements. And the δEu parameter is between 0.01 and 0.85, belonging to europium depletion type. The δCe parameter is between 0.95 and 1.23, reflecting normal-slightly enrichment. Overall, the rocks are mainly by I-type granite. Combined with the tectonic discrimination diagrams, the authors concluded that intermediate-acid intrusive rocks in Dashuigou are orogenic granite formed after Early Devonian.

Key words： East Kunlun organic belt intermediate-acid intrusive rocks zircon U-Pb dating Early Devonian

Received: 27 May 2017

ZTFLH:	P588.121
	P588.122
	P597.3

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	Articles by authors
	DENG Hongbin
	XIE Qixing
	WEI Huacai
	SUN Ping
	YAO Bo

Cite this article:

DENG Hongbin,XIE Qixing,WEI Huacai, et al. Formation age and petrological geochemical characteristics of intermediate-acid intrusive rocks in Dashuigou of East Kunlun organic belt[J]. , 2018, 5(1): 51-59.

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http://www.zgdzdcbjb.com/EN/10.19388/j.zgdzdc.2018.01.08 OR http://www.zgdzdcbjb.com/EN/Y2018/V5/I1/51

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