Palynological indications of environmental changes during the Late Creataceous-Eocene on the southern continental margin of Laurasia, Xizang (Tibet)
Li Jianguo (李建国)1; Batten, David J.2,3; Zhang Yiyong (张一勇)1
2008-07-31
发表期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
卷号265期号:1-2页码:78-86
摘要

A palynostratigraphic and palynofacies study of a geological section at Cuojiangding in Zhongba Conty has provided a basis for discussing the palaeoenvironmental evolution of the southern continentla margin of Laurasia in Xizang (Tibet) towards the end of the Creataceous Period and during the Paleogene. It is the only record of fossil spores and pollen grains from collision- and convergence-related sediments close to the major Yarlung Zangbo Suture. Deposits of the Padana Formation at the base of the section through the Qubeiya, Quxia, and Jialazi formations to the Rujiao Zangbo Conglomerate at the top are considered to range in age from Santonian to Eocene or possibly Oligocene. During this period the India plate collided with, and continued to push against, Laurasia plate. Two spore and pollen zones and three palynofacies types are recognized. These are correlated with two transgressive-regrassive cycles associated with the collision, periods of geologically rapid uplift being reflected by the molasse-like sediments of the upper Quxia Formation and the Rujiao Zangbo Conglomerate, which accumulated during the Late Paleocene and Eocene-Oligocene respectively. The first regression led to intermittent subaerial exposure and erosion of the Cuojiangding area. The second ended the marine history of the area and led first to the development of swamps in a subtropical climate, now preserved in the coal-bearing Qiuwu Formation, and later to the development of mountainous terrain, with a cooler climate at higher elevations. (C) 2008 Elsevier B.V. All rights reserved.

关键词Yarlung Zangbo Suture India-laurasia Collision Cretaceous-paleogene Palynology Palaeoenvironment
DOI10.1016/j.palaeo.2008.04.017
语种英语
关键词[WOS]Fore-arc Basin ; Asia ; Tectonics ; Himalaya ; India
资助项目Pilot Project of knowledge Innovation[CAS (KZCX2-YW-105)] ; National Basic Research Program of China[2006CB701402] ; Chinese Academy of Sciences
WOS研究方向Physical Geography ; Geology ; Paleontology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号WOS:000258992100007
项目资助者Pilot Project of knowledge Innovation ; National Basic Research Program of China ; Chinese Academy of Sciences
出版者ELSEVIER SCIENCE BV
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/173
专题中国科学院南京地质古生物研究所
其他
通讯作者Li Jianguo (李建国)
作者单位1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
2.Univ Manchester, Sch Earth Atmospher & Environm Sci, Manchester M13 9PL, Lancs, England
3.Univ Wales, Inst Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales
第一作者单位中国科学院南京地质古生物研究所
通讯作者单位中国科学院南京地质古生物研究所
推荐引用方式
GB/T 7714
Li Jianguo ,Batten, David J.,Zhang Yiyong . Palynological indications of environmental changes during the Late Creataceous-Eocene on the southern continental margin of Laurasia, Xizang (Tibet)[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2008,265(1-2):78-86.
APA Li Jianguo ,Batten, David J.,&Zhang Yiyong .(2008).Palynological indications of environmental changes during the Late Creataceous-Eocene on the southern continental margin of Laurasia, Xizang (Tibet).PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,265(1-2),78-86.
MLA Li Jianguo ,et al."Palynological indications of environmental changes during the Late Creataceous-Eocene on the southern continental margin of Laurasia, Xizang (Tibet)".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 265.1-2(2008):78-86.
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