Quantitative Biostratigraphic Analysis upon the Upper Cretaceous in;Tethyan Himalaya

doi:10.1111/1755-6724.12101

	Quantitative Biostratigraphic Analysis upon the Upper Cretaceous in;Tethyan Himalaya
	Li Guangwei 3; Zeng Jun 1
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2013
卷号	87 期号:4 页码:926-935
关键词	quantitative biostratigraphy graphic correlation constrained optimization Tethyan Himalayan sequences Upper Cretaceous
ISSN号	1000-9515;EI 1755-6724
DOI	10.1111/1755-6724.12101
英文摘要	Biostratigraphic analysis is an essential element for understanding global tectonics and the evolution of life on Earth. Quantitative analysis of sedimentary sequences provides the precise age constraints on timing of significant events in Earth's history. This paper presents results from quantitative stratigraphic analysis of Upper Cretaceous Tethyan Himalayan sequences. This analysis resulted in a new composite stratigraphic section for the Cretaceous strata of Tibet (TIBETKCS). The eight Upper Cretaceous sections were analyzed in this study and 12 planktonic foraminifera zones were recognized based on available data. Quantitative measurements were made using a Graphic Correlation with Graphcor 3.0 software and correlated to the world standard Cretaceous Composite Section (MIDKCS). The sections were also examined using Constrained Optimization software by CONOP9. Level Penalty was applied as the rule to measure misfit among automatically correlated sections. The new TIBETKCS correlates well with planktonic foraminifera ages from previous work in southern Tibet. A fitting equation of y=-0.19x+305 with a correlation coefficient of 0.94 was obtained from this work The ages of the first and last appearances of 64 planktonic foraminifera can be calculated with this equation with +/- 0.3 Ma precision. This level of precision is approximately 10 times higher than age determinations with traditional methods. Two extinction events were resolved within this analysis at approximate to 93.5 Ma and approximate to 85.5 Ma corresponding to the Ocean Anoxic Events at Cenomanian-Turonian and Coniacian-Santonian boundaries respectively.
学科主题	地层学与地史学
WOS关键词	SOUTHERN TIBET ; ISOTOPE STRATIGRAPHY ; CHINA ; STRATA ; RESOLUTION ; TECTONICS ; COLLISION ; ZONATION ; EVENTS ; RECORD
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000323744100004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40087]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, State Key Lab Continental Tecton & Dynam, Inst Geol, Beijing 100037, Peoples R China. 2.China Univ Geosci, Sch Geosci & Resources, Beijing 100083, Peoples R China. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Li Guangwei,Zeng Jun. Quantitative Biostratigraphic Analysis upon the Upper Cretaceous in;Tethyan Himalaya[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2013,87(4):926-935.
APA	Li Guangwei,&Zeng Jun.(2013).Quantitative Biostratigraphic Analysis upon the Upper Cretaceous in;Tethyan Himalaya.ACTA GEOLOGICA SINICA-ENGLISH EDITION,87(4),926-935.
MLA	Li Guangwei,et al."Quantitative Biostratigraphic Analysis upon the Upper Cretaceous in;Tethyan Himalaya".ACTA GEOLOGICA SINICA-ENGLISH EDITION 87.4(2013):926-935.