Middle-Upper Ordovician (Darriwilian-Early Katian) Positive Carbon Isotope Excursions in the Northern Tarim Basin, Northwest China: Implications for Stratigraphic Correlation and Paleoclimate

doi:10.1007/s12583-016-0696-2

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地球物理与资源研究室

	Middle-Upper Ordovician (Darriwilian-Early Katian) Positive Carbon Isotope Excursions in the Northern Tarim Basin, Northwest China: Implications for Stratigraphic Correlation and Paleoclimate
	Shao Xiaoming 3; Wang Dawei2 ; Li Guorong 1; Liu Cunge 1; Luo Mingxia 3; Liu Yongli 3
刊名	Journal of Earth Science
	2016
卷号	27 期号:2 页码:317-328
关键词	Tarim Basin Tahe Oil-gas Field Darriwilian Sandbian Katian Carbon Isotope Paleoclimate Source Rock
DOI	10.1007/s12583-016-0696-2
英文摘要	Three positive carbon isotope excursions are reported from Middle-Upper Ordovician in Tahe oil-gas field, northern Tarim Basin. Based on conodont biostratigraphy, the Middle Darriwilian Isotope Carbon Excursion (MDICE) and the Guttenberg Carbon Isotope Excursion (GICE) are identified from Darriwilian to Early Katian by the aid of whole-rock carbon isotope data from two well cores. Positive excursion within conodont Pygodus anserinus zone is developed in Early Sandbian, and the fluctuation range is no less than MDICE. Because the range of this excursion in the generalized global carbon isotope curve is short, previous studies paid little attention to it, and named Early Sandbian Isotope Carbon Excursion (ESICE) in this paper. Furthermore, these positive excursions are not directly related to sea level fluctuations and the MDICE and GICE identified in northern Tarim can be globally correlated to that in southern China, North America, South America, and Europe. The Saergan Fm. source rocks of Middle-Upper Ordovician in Kalpin Dawangou outcrop are in accord with the geologic time of MDICE and ESICE, and GICE have strong ties to the source rock of Lianglitag Fm. in basin. Abundant organic carbon burial is an important factor in genesis of positive isotope carbon excursions. Positive oxygen isotope excursion, conodont fauna turnover, decreased conodont total diversity, and the change of sedimentary facies indicated that dramatic changes of paleoceanographic environment of Early-Middle Ordovician in Tarim Basin started from the end of Darriwillian, and an obvious icehouse climate of Late Ordovician occurred in ESICE.
学科主题	地质学
语种	中文
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/5248]
专题	深海科学研究部_深海地球物理与资源研究室
作者单位	1.Chengdu University of Technology, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu, 610059 2.Institute of DeepSea Science and Engineering, Chinese Academy of Sciences, Sanya, 572000 3.Institute of Exploration and Development, Northwest Oilfield Company, SINOPEC, Urumqi, 830011
推荐引用方式 GB/T 7714	Shao Xiaoming,Wang Dawei,Li Guorong,et al. Middle-Upper Ordovician (Darriwilian-Early Katian) Positive Carbon Isotope Excursions in the Northern Tarim Basin, Northwest China: Implications for Stratigraphic Correlation and Paleoclimate[J]. Journal of Earth Science,2016,27(2):317-328.
APA	Shao Xiaoming,Wang Dawei,Li Guorong,Liu Cunge,Luo Mingxia,&Liu Yongli.(2016).Middle-Upper Ordovician (Darriwilian-Early Katian) Positive Carbon Isotope Excursions in the Northern Tarim Basin, Northwest China: Implications for Stratigraphic Correlation and Paleoclimate.Journal of Earth Science,27(2),317-328.
MLA	Shao Xiaoming,et al."Middle-Upper Ordovician (Darriwilian-Early Katian) Positive Carbon Isotope Excursions in the Northern Tarim Basin, Northwest China: Implications for Stratigraphic Correlation and Paleoclimate".Journal of Earth Science 27.2(2016):317-328.