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Response of larger benthic foraminifera to the Paleocene-Eocene thermal maximum and the position of the Paleocene/Eocene boundary in the Tethyan shallow benthic zones: Evidence from south Tibet
Zhang, QH (Zhang, Qinghai)1,2,3; Willems, H (Willems, Helmut)3,4; Ding, L (Ding, Lin)1,2; Xu, XX (Xu, Xiaoxia)3
Source PublicationGEOLOGICAL SOCIETY OF AMERICA BULLETIN
2019
Volume131Issue:43832Pages:84-98
DOI10.1130/B31813.1
Abstract

The Paleocene-Eocene thermal maximum (PETM) is one of the most pronounced global warming events in the Cenozoic. This event was associated with a large negative carbon isotope excursion (CIE) and with major changes in the atmosphere, hydrosphere, and biosphere. However, how the larger benthic foraminifera (LBFs) in the shallow Tethyan Ocean responded to the PETM remains controversial. In this study, we investigate two shallow-marine, LBF-rich carbonate sections from south Tibet, aiming to locate the position of the Paleocene/Eocene (P/E) boundary in the Tethyan shallow benthic zones (SBZs) and to examine the response of the LBFs to the PETM. Carbon isotope compositions of bulk carbonate were measured to constrain the stratigraphic position of the CIE onset marking the P/E boundary in the sections, and the LBFs were studied in rock thin sections in order to assess their biostratigraphy and to construct the SBZs. The combination of the carbon isotope data and constructed SBZs shows that the P/E boundary is located within SBZS, not at the SBZ4/SBZ5 transition as proposed in the Western Tethyan domain. At the P/E boundary, no evident compositional change in LBF assemblages can be observed. However, a major compositional change in LBF assemblages occurs in the CIE recovery, characterized by the sudden disappearance of Miscellanea, Ranikothalia, Setia, Orbitosiphon, and the initial dominance of porcellaneous-walled Alveolina and Orbitolites together with small miliolids and rotaliids. We tentatively speculate that this compositional change in LBF assemblages may be related to a eutrophication event, likely resulting from intensified continental weathering during the CIE recovery of the PETM.

Subject AreaGeosciences
WOS IDWOS:000454928000006
Language英语
Indexed BySCI
KeywordCarbon-isotope Excursion Spatiotemporal Patterns Stable-isotopes Methane Hydrate Evolution Climate Ocean Biostratigraphy Stratigraphy Temperature
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
Cooperation Status国际
ISSN0016-7606
Department大陆碰撞与高原隆升
URL查看原文
PublisherGEOLOGICAL SOC AMER, INC
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/131C11/9457
Collection图书馆
Corresponding AuthorZhang, QH (Zhang, Qinghai)
Affiliation1.Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Lincui Rd 16-3, Beijing 100101, Peoples R China;
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Lincui Rd 16-3, Beijing 100101, Peoples R China;
3.Univ Bremen, Dept Geosci, Klagenfurter Str 4, D-28359 Bremen, Germany;
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, East Beijing Rd 39, Nanjing 210008, Jiangsu, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, QH ,Willems, H ,Ding, L ,et al. Response of larger benthic foraminifera to the Paleocene-Eocene thermal maximum and the position of the Paleocene/Eocene boundary in the Tethyan shallow benthic zones: Evidence from south Tibet[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2019,131(43832):84-98.
APA Zhang, QH ,Willems, H ,Ding, L ,&Xu, XX .(2019).Response of larger benthic foraminifera to the Paleocene-Eocene thermal maximum and the position of the Paleocene/Eocene boundary in the Tethyan shallow benthic zones: Evidence from south Tibet.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,131(43832),84-98.
MLA Zhang, QH ,et al."Response of larger benthic foraminifera to the Paleocene-Eocene thermal maximum and the position of the Paleocene/Eocene boundary in the Tethyan shallow benthic zones: Evidence from south Tibet".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 131.43832(2019):84-98.
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