The PETM-CIE and shallow-water biotic changes in the eastern Neotethys Ocean (Tibet/China and Ladakh/India)

新特提斯洋东部的 PETM-CIE 和浅水生物变化（西藏/中国和拉达克/印度）

• 批准号: 239955959
• 负责人: Professor Dr. Helmut Willems
• 金额: --
• 依托单位: Fachbereich 05: Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/239955959?language=en
• 关键词: PETM; CIE; shallow; water; biotic

The project is mainly addressed to the mechanisms triggering the Carbon Isotope Excursion (CIE) and associated shallow water biotic changes at the Paleocene - Eocene boundary. Our former studies have shown that the CIE event was well preserved in Tibet and Ladakh, and it coincided with the initial India-Asia Continental Collision (IIACC) and the Larger Foraminiferal Extinction and Origination event (LFEO). To investigate the CIE in the eastern tropical Neotethys Ocean and decipher the possible linkage among the CIE, the IIACC, and the LFEO, four shallow marine areas on the northern Indian passive continental margin (Guru-Gamba-Tingri-Ladakh) and one from the southern Asian active continental margin (Tso Jiangding) will be studied. Geochemical and isotopic analyses (Carbon and Oxygen isotopes, TOC, CaCO3 content, trace elements, biomarker, clay mineral composition) and studies of palaeontology, biostratigraphy, sedimentology and microfacies will be integrated to reveal the causes of paleoenvironmental and biotic changes in the course of the India-Asia plate convergence and their final collision. The project will evaluate effects of the IIACC and the progressively narrowing of the eastern Neotethys Ocean on palaeoenvironmental and biotic changes as well as regional ocean current systems close to the equatorial realm. In the light of a number of remarkably high-resolution PETM sections, the project may promote our understanding of the interactions of geo- and biosphere as well as ocean-atmosphere system during the late Paleocene-early Eocene.

该项目主要涉及在古新世-始新世边界触发碳同位素漂移(CIE)和与之相关的浅水生物变化的机制。我们以往的研究表明，CIE事件在西藏和拉达克保存良好，并与最初的印度-亚洲大陆碰撞(IIACC)和更大的有孔虫灭绝和起源事件(LFEO)重合。为了研究热带东部Neotethys洋的CIE，并破译CIE、IIACC和LFEO之间的可能联系，将研究印度北部被动大陆边缘的4个浅海区域(古鲁-冈巴-廷里-拉达克)和南亚活动大陆边缘的一个浅海区域(左江定)。地球化学和同位素分析(碳、氧同位素、总有机碳、碳酸钙含量、微量元素、生物标志物、粘土矿物组成)以及古生物学、生物地层学、沉积学和微相的研究将综合起来，揭示印度-亚洲板块汇聚和最终碰撞过程中古环境和生物变化的原因。该项目将评估IIACC和新特提斯洋东部逐渐变窄对古环境和生物变化以及赤道区附近区域洋流系统的影响。根据大量极高分辨率的PETM切片，该项目可能会促进我们对古新世晚期-始新世早期地球-生物圈和海洋-大气系统相互作用的理解。

项目成果

Paleocene and Lower Eocene shallow-water limestones of Tibet: Microfacies analysis and correlation of the eastern Neo-Tethyan Ocean

• DOI: 10.1016/j.palwor.2017.12.002
• 发表时间: 2017-12
• 期刊: Palaeoworld
• 影响因子: 1.7
• 作者: Michaela M. Kahsnitz;H. Willems;Hui Luo;Zhihong Zhou

STRATIGRAPHIC DISTRIBUTION OF THE LARGER BENTHIC FORAMINIFERA LOCKHARTIA IN SOUTH TIBET (CHINA)

藏南地区大型底栖有孔虫的地层分布（中国）

• DOI: 10.2113/gsjfr.46.1.34
• 发表时间: 2016
• 期刊: Journal of Foraminiferal Research
• 影响因子: 1.1
• 作者: Kahsnitz;Qinghai Zhang ;Willems
• 通讯作者: Willems

Genesis of Paleocene and Lower Eocene shallow-water nodular limestone of South Tibet (China)

• DOI: 10.1007/s13146-017-0360-7
• 发表时间: 2019-06
• 期刊: Carbonates and Evaporites
• 影响因子: 1.4
• 作者: Michaela M. Kahsnitz;H. Willems

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

• DOI: 10.1130/b31813.1
• 发表时间: 2018-08
• 期刊: GSA Bulletin
• 作者: Qinghai Zhang;H. Willems;L. Ding;Xiaoxia Xu

Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera

• DOI: 10.1016/j.gloplacha.2019.103049
• 发表时间: 2020
• 期刊: Global and Planetary Change
• 影响因子: 3.9
• 作者: Qinghai Zhang;L. Ding;K. Kitajima;J. Valley;Bo Zhang;Xiaoxia Xu;H. Willems;A. Klügel