气候变化领域集成服务门户(CCPortal): Tectonic Implications of Detrital Zircon Ages From Lesser Himalayan Mesozoic-Cenozoic Strata, Pakistan

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DOI	10.1002/2017GC006895
	Tectonic Implications of Detrital Zircon Ages From Lesser Himalayan Mesozoic-Cenozoic Strata, Pakistan
	Qasim, Muhammad; Ding, Lin; Khan, Muhammad Asif; Jadoon, Ishtiaq A. K.; Haneef, Muhammad; Baral, Upendra; Cai, Fulong; Wang, Houqi; Yue, Yahui
通讯作者	Qasim, M ; Ding, L (通讯作者)
发表日期	2018
ISSN	1525-2027
起始页码	1636
结束页码	1659
卷号	19 期号:5
英文摘要	We carried U-Pb-Hf geochronology of the clastic sequence covering upper Mesozoic-Cenozoic period. The upper Mesozoic sequence is overlain unconformably by the Cenozoic strata, marking regional K-T boundary, which is mapped as angular unconformity. This angular relationship may strongly indicate a compressional orogenic event that occurred during the Late Cretaceous. Late Cretaceous Kohistan-Karakoram collision and ophiolite emplacement may account for the development of this compression along the northern Indian margin. The U-Pb-Hf isotopic analyses of the upper Mesozoic and lower Cenozoic sequence (Hangu Formation and Lower Patala Formation) are similar to the Tethyan and Lesser Himalayan signatures, which indicate the Indian-plate provenance. The two younger Cretaceous grains recorded in the Hangu Formation might be derived from the Indian-plate volcanic rocks and/or Tethyan Himalayan volcanic rocks. The absence of ophiolitic age component in the precollision sequence may indicate that these ophiolites are not exposed until final India-Eurasia collision. The major shift in provenance is recorded in the upper part of the Patala Formation, where the presence of disconformity and the appearance of <100 Ma detrital zircons indicate the contribution of Eurasian source (i.e., Kohistan-Ladakh arc; KLA), which is further supported by the Hf(t) signatures. Upsection, the contribution from Eurasian source increased in the Early Middle Eocene Kuldana Formation. Therefore, we suggest that the provenance mixing close to Paleocene-Eocene boundary indicates that the India-Eurasia collision in the north Pakistan occurred at approximate to 56-55 Ma and subsequent exhumation increased the contribution of the northern (Eurasian) provenance in the upsection.
关键词	INDIA-ASIA COLLISION SOUTHERN TIBET IMPLICATIONS HF ISOTOPIC CONSTRAINTS MIDDLE EOCENE AGE U-PB NORTH PAKISTAN FORELAND BASIN TETHYAN HIMALAYA LADAKH HIMALAYA SUTURE ZONE
英文关键词	Mesozoic-Cenozoic; detrital zircon; U-Pb dating; India-Asia collision; northwestern Himalaya; Pakistan
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000436542200013
来源期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
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/259221
推荐引用方式 GB/T 7714	Qasim, Muhammad,Ding, Lin,Khan, Muhammad Asif,et al. Tectonic Implications of Detrital Zircon Ages From Lesser Himalayan Mesozoic-Cenozoic Strata, Pakistan[J]. 中国科学院青藏高原研究所,2018,19(5).
APA	Qasim, Muhammad.,Ding, Lin.,Khan, Muhammad Asif.,Jadoon, Ishtiaq A. K..,Haneef, Muhammad.,...&Yue, Yahui.(2018).Tectonic Implications of Detrital Zircon Ages From Lesser Himalayan Mesozoic-Cenozoic Strata, Pakistan.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,19(5).
MLA	Qasim, Muhammad,et al."Tectonic Implications of Detrital Zircon Ages From Lesser Himalayan Mesozoic-Cenozoic Strata, Pakistan".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 19.5(2018).