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Recognition of tuffs in the middle-upper Dingqinghu Fm., Lunpola Basin, central Tibetan Plateau: Constraints on stratigraphic age and implications for paleoclimate
Mao, ZQ (Mao, Ziqiang)1,2; Meng, QQ (Meng, Qingquan)3; Fang, XM (Fang, Xiaomin)1,2; Zhang, T (Zhang, Tao)1; Wu, FL (Wu, Fuli)1; Yang, YB (Yang, Yibo)1; Zhang, WL (Zhang, Weilin)1; Zan, JB (Zan, Jinbo)1; Tan, MQ (Tan, Mengqi)1,2
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
2019
Volume525Issue:0Pages:44-56
DOI10.1016/j.palaeo.2019.03.040
Abstract

The Lunpola Basin plays a key role in determining the elevation history of the central Tibetan Plateau, which is closely related to uplift dynamics and paleoclimatic evolution. However, accurate age constraints on the basin stratigraphy reflecting tectonic, paleo-elevation and climate information have long been vigorously debated, mostly due to a lack of absolute age controls. Here, we found two altered tuff layers in the middle-upper Dingqinghu Formation (Fm.) in the basin stratigraphic sequence. Detailed lithological, mineralogical and geochemical analyses of the tuffs indicate that they came from trachyandesite and identify analcime as the typical alteration mineral, suggesting primary deposition. LA-ICP-MS zircon U-Pb dating of the tuffs yields concordant ages of 20.6 +/- 0.1 Ma and 20.7 +/- 0.1 Ma, indicating that the end of the Dingqinghu Fm., i.e., the Lunpola stratigraphic sequence, and the uplift of the plateau to its current high elevations occurred much later than previously estimated. The contemporaneous thick black oil shales in the Lunpola deep lake and biocoenosis together suggest that the climate was humid and warm during this period.

Subject AreaGeosciences
WOS IDWOS:000468711700004
Language英语
Indexed BySCI
KeywordSouthern Tibet Asian Monsoons Volcanic-rocks Northern Tibet Late Eocene Uplift Evolution Climate Paleoelevation Magmatism
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
Cooperation Status国内
ISSN0031-0182
Department大陆碰撞与高原隆升重点实验室
URL查看原文
PublisherELSEVIER SCIENCE BV
SubtypeArticle
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9256
Collection图书馆
Corresponding AuthorMeng, QQ (Meng, Qingquan); Fang, XM (Fang, Xiaomin)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
3.Lanzhou Univ, Sch Earth Sci, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Peoples R China.
Recommended Citation
GB/T 7714
Mao, ZQ ,Meng, QQ ,Fang, XM ,et al. Recognition of tuffs in the middle-upper Dingqinghu Fm., Lunpola Basin, central Tibetan Plateau: Constraints on stratigraphic age and implications for paleoclimate[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,525(0):44-56.
APA Mao, ZQ .,Meng, QQ .,Fang, XM .,Zhang, T .,Wu, FL .,...&Tan, MQ .(2019).Recognition of tuffs in the middle-upper Dingqinghu Fm., Lunpola Basin, central Tibetan Plateau: Constraints on stratigraphic age and implications for paleoclimate.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,525(0),44-56.
MLA Mao, ZQ ,et al."Recognition of tuffs in the middle-upper Dingqinghu Fm., Lunpola Basin, central Tibetan Plateau: Constraints on stratigraphic age and implications for paleoclimate".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 525.0(2019):44-56.
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