Influence of igneous intrusions on the temperature field and organic maturity of the Changchang Sag, Qiongdongnan Basin, South China Sea

doi:10.6038/cjg20130116

	Influence of igneous intrusions on the temperature field and organic maturity of the Changchang Sag, Qiongdongnan Basin, South China Sea
	Tang Xiao-Yin 1; Zhang Gong-Cheng 2; Liang Jian-She 2; Yang Shu-Chun 2; Rao Song 1; Hu Sheng-Biao 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2013
卷号	56 期号:1 页码:159-169
关键词	Changchang Sag Igneous intrusion Temperature field Thermal history Organic maturity Two-dimensional finite element method
ISSN号	0001-5733
DOI	10.6038/cjg20130116
文献子类	Article
英文摘要	The latest seismic interpretation suggests the presence of several igneous intrusions in the Changchang Sag, Qiong dongnan Basin, South China Sea. A 2-D geothermal modeling based on the finite element method (FEM) has been performed to analyze the thermal effect of the three intrusions of different scales distributed in the same seismic line. The organic maturity change for the Yacheng Formation caused by intrusions was demonstrated by artificial wells 2 km and 5 km away from each igneous body in combination with the acquired paleo-geothermal field and the Easy%Ro model. The results indicate that the temperature of igneous bodies dropped down rapidly during the first 1 Ma after the intrusion and cooled down to nearly the same temperature as that of the wall rock after 10 Ma. The biggest intrusion caused a theoretical vitrinite reflectance (Ro) 1.6% higher than normal for the Yacheng Formation at a distance of 2 km away from it and only 0.4% higher at a distance of 5 km.
WOS关键词	VITRINITE REFLECTANCE ; SEDIMENTARY BASINS ; BITUMINOUS COAL ; PITKIN COUNTY ; MATURATION ; GENERATION ; SCOTLAND ; ROCKS ; GEOCHEMISTRY ; MECHANISM
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000314480100016
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/88066]
专题	中国科学院地质与地球物理研究所
通讯作者	Tang Xiao-Yin
作者单位	1.Chinese Acad Sci, Inst Geol Ad Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.CNOOC Res Inst, Beijing 100027, Peoples R China
推荐引用方式 GB/T 7714	Tang Xiao-Yin,Zhang Gong-Cheng,Liang Jian-She,et al. Influence of igneous intrusions on the temperature field and organic maturity of the Changchang Sag, Qiongdongnan Basin, South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(1):159-169.
APA	Tang Xiao-Yin,Zhang Gong-Cheng,Liang Jian-She,Yang Shu-Chun,Rao Song,&Hu Sheng-Biao.(2013).Influence of igneous intrusions on the temperature field and organic maturity of the Changchang Sag, Qiongdongnan Basin, South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(1),159-169.
MLA	Tang Xiao-Yin,et al."Influence of igneous intrusions on the temperature field and organic maturity of the Changchang Sag, Qiongdongnan Basin, South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.1(2013):159-169.