气候变化领域集成服务门户(CCPortal): Provenance analysis reveals mountain uplift in the midsection of the Altyn Tagh Fault during the Middle Miocene

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DOI	10.1139/cjes-2016-0090
	Provenance analysis reveals mountain uplift in the midsection of the Altyn Tagh Fault during the Middle Miocene
	Zhang, Zhiguo; Nie, Junsheng; Fang, Xiaomin
通讯作者	Zhang, ZG (通讯作者)
发表日期	2017
ISSN	0008-4077
EISSN	1480-3313
起始页码	278
结束页码	289
卷号	54 期号:3
英文摘要	The Altyn Tagh Fault (ATF) defines the northern margin of the Tibetan Plateau; therefore, its tectonic history is key to understanding the plateau's northward growth. However, our understanding of ATF tectonics is incomplete, owing in part to a lack of constraints in detailed basin evolution studies of this region. Approximately 1700 m of Middle Miocene-Pliocene clastic strata extracted from a section of the Yitunbulake Basin adjacent to the midsection of the ATF records the uplift of the Altyn Tagh Range. This paper reports 490 concordant detrital zircon U-Pb ages derived from this set of strata. In addition, paleocurrents and conglomerate clastic compositions were measured to determine the provenance of the basin. The dominant detrital zircon age populations within these sedimentary rocks are 260-240, 500-400, and 950-900 Ma. The 260-240 Ma component decreases sharply above the Lower (Xia) Youshashan (XYSS) Formation. Moreover, we performed (U-Th)/He dating on 260-240 Ma detrital zircons from the XYSS Formation to determine its source region. The results indicate that sandstones in this formation are most likely sourced immediately from plutonic rocks widely distributed in the Eastern Kunlun Mountains. The upward change in detrital zircon U-Pb age components in the section demonstrates that widespread surface uplift of the Akatengneng Mountains in the midsection of the ATF likely occurred after similar to 16-15 Ma, which is synchronous with accelerated tectonic deformation along the ATF and a rapid increase in the sedimentation rate in the Qaidam Basin since the Middle Miocene.
关键词	NORTHERN TIBETAN PLATEAU MAGDALENA VALLEY BASIN U-PB GEOCHRONOLOGY DETRITAL-ZIRCON QAIDAM BASIN CENOZOIC EXHUMATION TECTONIC EVOLUTION SURFACE UPLIFT HEXI CORRIDOR HISTORY
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000395535800005
来源期刊	CANADIAN JOURNAL OF EARTH SCIENCES
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/258965
推荐引用方式 GB/T 7714	Zhang, Zhiguo,Nie, Junsheng,Fang, Xiaomin. Provenance analysis reveals mountain uplift in the midsection of the Altyn Tagh Fault during the Middle Miocene[J]. 中国科学院青藏高原研究所,2017,54(3).
APA	Zhang, Zhiguo,Nie, Junsheng,&Fang, Xiaomin.(2017).Provenance analysis reveals mountain uplift in the midsection of the Altyn Tagh Fault during the Middle Miocene.CANADIAN JOURNAL OF EARTH SCIENCES,54(3).
MLA	Zhang, Zhiguo,et al."Provenance analysis reveals mountain uplift in the midsection of the Altyn Tagh Fault during the Middle Miocene".CANADIAN JOURNAL OF EARTH SCIENCES 54.3(2017).