A comparative study between present and palaeo-heat flow in the Qiangtang Basin, northern Tibet, China

doi:10.1016/j.marpetgeo.2014.05.020

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	A comparative study between present and palaeo-heat flow in the Qiangtang Basin, northern Tibet, China
	He, Jianglin 4; Wang, Jian ; Tan, Fuwen ; Chen, Ming ; Li, Zhongxiong ; Sun, Tao 1; Wang, Pingkang 2; Du, Baiwei ; Chen, Wenbin
刊名	MARINE AND PETROLEUM GEOLOGY
	2014
卷号	57 页码:345-358
关键词	Heat flow Thermal conductivity Geothermal gradient Qiangtang Basin Tibet
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2014.05.020
英文摘要	The Qiangtang Basin is a significant prospective area for hydrocarbon and gas hydrate resources in the Tibetan Plateau, China. However, relatively little work has been performed to characterise heat flow in this basin, which has restricted petroleum and gas hydrate exploration. In this study, we compare present and palaeo-heat flow in the Qiangtang Basin to provide information on geothermal regime, hydrocarbon generation and permafrost that is necessary for further petroleum and gas hydrate exploration. We base our study on temperature data from a thermometer well, thermal conductivity tests, vitrinite reflectance data, homogenisation temperature data from fluid inclusions, stratigraphic information and a time-independent modelling approach. Our results indicate that in the central Qiangtang Basin, the present thermal gradient is approximately 15.5 degrees C/km, and heat flow is approximately 46.69 mW/m(2). Heat flow in the Qiangtang Basin is not relatively stable since the Early Jurassic, as previous research has suggested, and it is generally decreasing with time. Additionally, there is a clear difference between the hottest thermal regime of the southern and northern Qiangtang Depressions during Cretaceous to Pleistocene time. In the southern Qiangtang Depression, the palaeogeothermal gradient is approximately 32.0 degrees C/km, and palaeo-heat flow is approximately 70 mW/m(2). However, in the northern Qiangtang Depression, the palaeogeothermal gradient exceeds 81.8 degrees C/km, and palaeo-heat flow is greater than 172.09 mW/m(2). The high thermal regime in the northern Qiangtang Depression is driven mainly by hydrothermal convection. Gas reservoirs are possible targets for hydrocarbon exploration in this depression. Currently, the northwestern part of the northern Qiangtang Depression is the most favourable area for gas hydrate exploration in the Qiangtang Basin. (C) 2014 Elsevier Ltd. All rights reserved.
学科主题	固体地球物理学
WOS关键词	VITRINITE REFLECTANCE ; TECTONIC HISTORY ; THERMAL MATURATION ; CONTINENTAL-SHELF ; ORGANIC-MATTER ; GAS HYDRATE ; ORDOS BASIN ; EVOLUTION ; METAMORPHISM ; TEMPERATURE
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000342530100022
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40350]
专题	中国地质调查局成都地质调查中心
作者单位	1.Minist Land & Resources, Chengdu Inst Geol & Mineral Resources, Chengdu 610082, Sichuan, Peoples R China 2.CNOOC, Res Inst, Beijing 100027, Peoples R China 3.China Geol Survey, Oil & Gas Survey, Beijing 100029, Peoples R China 4.中国地质调查局成都地质调查中心
推荐引用方式 GB/T 7714	He, Jianglin,Wang, Jian,Tan, Fuwen,et al. A comparative study between present and palaeo-heat flow in the Qiangtang Basin, northern Tibet, China[J]. MARINE AND PETROLEUM GEOLOGY,2014,57:345-358.
APA	He, Jianglin.,Wang, Jian.,Tan, Fuwen.,Chen, Ming.,Li, Zhongxiong.,...&Chen, Wenbin.(2014).A comparative study between present and palaeo-heat flow in the Qiangtang Basin, northern Tibet, China.MARINE AND PETROLEUM GEOLOGY,57,345-358.
MLA	He, Jianglin,et al."A comparative study between present and palaeo-heat flow in the Qiangtang Basin, northern Tibet, China".MARINE AND PETROLEUM GEOLOGY 57(2014):345-358.