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	Age, provenance and tectonic setting of Dajin conglomerate, Tibet
	Li Shun; Ding Lin; Fu JiaJun; Yue YaHui
通讯作者	Li, S (通讯作者)
发表日期	2016
ISSN	1000-0569
EISSN	2095-8927
起始页码	3537
结束页码	U326
卷号	32 期号:11
英文摘要	The Dajin conglomerate that crops out along the southern foot of Mt. Kailas is a matter of concern because of the presence of larger benthic foraminifera in the strata. As the uncertainty of the depositional age, the tectonic setting of this unit is still in debate. In this study, the youngest age cluster of detrital zircons from Dajin conglomerate constrains the maximum depositional age of this unit to be Late Oligocene to Early Miocene (24 similar to 27Ma). Provenance data (field observation, sandstone petrology and detrital zircon U-Pb ages) indicate that the basal and top sections of Dajin conglomerate were derived directly from Gangdese arc, but the middle part of this unit (including the foraminiferal assemblages) was recycled from the Cuojiangding Group in the west. Dajin conglomerate is in conformable contact with the overlying Gangdese conglomerate. The age and provenance results of Dajin conglomerate are also consistent with Gangdese conglomerate. Therefore, we conclude that Dajin conglomerate is part of the Gangdese conglomerate. The strata of Dajin conglomerate are weakly deformed and mostly planar. This unit should be deposited in extensional tectonic regime, which might be related to the rollback and break-off of the down-going Indian plate during Late Oligocene to Early Miocene.
关键词	FORE-ARC BASIN INDIA-ASIA COLLISION TSANGPO SUTURE ZONE ZIRCON U-PB SOUTHERN TIBET SEDIMENTARY HISTORY GANGDESE BATHOLITH SOUTHWESTERN TIBET VOLCANIC-ROCKS CLASTIC ROCKS
英文关键词	Dajin conglomerate; Gangdese conglomerate; Provenance analysis; Zircon U-Pb age; Tibet
语种	英语
WOS研究方向	Geology
WOS类目	Geology
WOS记录号	WOS:000388278500022
来源期刊	ACTA PETROLOGICA SINICA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258642
推荐引用方式 GB/T 7714	Li Shun,Ding Lin,Fu JiaJun,et al. Age, provenance and tectonic setting of Dajin conglomerate, Tibet[J]. 中国科学院青藏高原研究所,2016,32(11).
APA	Li Shun,Ding Lin,Fu JiaJun,&Yue YaHui.(2016).Age, provenance and tectonic setting of Dajin conglomerate, Tibet.ACTA PETROLOGICA SINICA,32(11).
MLA	Li Shun,et al."Age, provenance and tectonic setting of Dajin conglomerate, Tibet".ACTA PETROLOGICA SINICA 32.11(2016).