Early-middle Miocene topographic growth of the northern Tibetan Plateau: Stable isotope and sedimentation evidence from the southwestern Qaidam basin

doi:10.1016/j.palaeo.2016.08.025

	Early-middle Miocene topographic growth of the northern Tibetan Plateau: Stable isotope and sedimentation evidence from the southwestern Qaidam basin
	Pullen, Alex 1,3; Chang, Hong 2; Garzione, Carmala N.3; Li, Lin 3
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2016-11-01
卷号	461 期号:2016 页码:201-213
关键词	Tibetan Plateau Qaidam Basin Stable Isotope Facies Analysis Topographic Growth Paleoclimate
DOI	10.1016/j.palaeo.2016.08.025
文献子类	Article
英文摘要	This study presents fades analysis and carbonate stable isotopic records of a 4435-m-thick Oligocene-middle Miocene (similar to 30 to similar to 11 Ma) stratigraphic section from the southwestern Qaidam basin, which place constraints on the interplay between topographic growth and climatic/hydrologic changes in the northern Tibetan Plateau. Three types of carbonate, including marl/limestone, pedogenic carbonate and carbonate cement, were collected and went through detailed screening for diagenesis. Carbonate cements are primary early diagenetic carbonates formed in shallow ground water setting. The majority of marls/limestones and pedogenic carbonates are primary micritic carbonates, whereas a few of them showing alterations were sub-sampled to avoid diagenetic phases. A negative shift in the delta O-18 values of marls/limestones and depositional environment change from palustrine to shallow lacustrine associated with paleohydrological change at similar to 20 Ma are likely caused by tectonic activity in adjacent ranges. Around 15-14 Ma, a decrease of similar to 1.5 parts per thousand in the most negative delta O-18 values of carbonate cements is interpreted to reflect the topographic growth of surrounding mountain ranges (i.e., Altun Shan, East Kunlun Range). This inference is supported by the sedimentary fades change from marginal lacustrine to fluvial that was accompanied by an abrupt increase in sedimentation rate. Finally, a similar to 1.5 parts per thousand positive shift in the most negative delta O-18 values of carbonate cements and pedogenic carbonates, enriched delta C-13 values of pedogenic carbonates, as well as sedimentary environment change from fluvial to braided river/alluvial fan at 13-12 Ma, most likely reflect a regional aridification event observed over a large area of the Central Asia. This aridification event may have been associated with continued topographic growth of the northern Tibetan Plateau to a critical elevation to block moisture (e.g., Westerlies) from penetrating the interior of Central Asia. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词	ALTYN-TAGH FAULT ; CENOZOIC TECTONIC EVOLUTION ; EOCENE-OLIGOCENE TRANSITION ; APATITE FISSION-TRACK ; CENTRAL-ASIA ; TARIM BASIN ; NORTHEASTERN TIBET ; ROCKY-MOUNTAINS ; CLIMATE-CHANGE ; RANGE GROWTH
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
WOS记录号	WOS:000385599900017
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5652]
专题	地球环境研究所_古环境研究室
作者单位	1.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Univ Rochester, Dept Earth & Environm Sci, 601 Elmwood Ave, Rochester, NY 14627 USA
推荐引用方式 GB/T 7714	Pullen, Alex,Chang, Hong,Garzione, Carmala N.,et al. Early-middle Miocene topographic growth of the northern Tibetan Plateau: Stable isotope and sedimentation evidence from the southwestern Qaidam basin[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2016,461(2016):201-213.
APA	Pullen, Alex,Chang, Hong,Garzione, Carmala N.,&Li, Lin.(2016).Early-middle Miocene topographic growth of the northern Tibetan Plateau: Stable isotope and sedimentation evidence from the southwestern Qaidam basin.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,461(2016),201-213.
MLA	Pullen, Alex,et al."Early-middle Miocene topographic growth of the northern Tibetan Plateau: Stable isotope and sedimentation evidence from the southwestern Qaidam basin".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 461.2016(2016):201-213.