Heat flow study at the Chinese Continental Scientific Drilling site: Borehole temperature, thermal conductivity, and radiogenic heat production

doi:10.1029/2007JB004958

	Heat flow study at the Chinese Continental Scientific Drilling site: Borehole temperature, thermal conductivity, and radiogenic heat production
	He, Lijuan 1; Hu, Shengbiao 1; Huang, Shaopeng 2; Yang, Wencai 3; Wang, Jiyang 1; Yuan, Yusong 1; Yang, Shuchun 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2008-02-23
卷号	113 期号:B2
ISSN号	2169-9313
DOI	10.1029/2007JB004958
文献子类	Article
英文摘要	The Chinese Continental Scientific Drilling ( CCSD) Project offers a unique opportunity for studying the thermal regime of the Dabie-Sulu ultrahigh-pressure metamorphic belt. In this paper, we report measurements of borehole temperature, thermal conductivity, and radiogenic heat production from the 5158 m deep main hole ( CCSD MH). We have obtained six continuous temperature profiles from this borehole so far. The temperature logs show a transient mean thermal gradient that has increased from 24.38 to 25.28 K km(-1) over a period of about 1.5 years. We measured thermal conductivities and radiogenic heat productions on more than 400 core samples from CCSD MH. The measured thermal conductivities range between 1.71 and 3.60 W m(-1) K-1, and the radiogenic heat productions vary from 0.01 mu W m(-3) to over 5.0 mu W m(-3), with a mean value of 1.23 +/- 0.82 mu W m(-3) for the upper 5-km layer of the crust. The heat productions in CCSD MH appear to be more rock-type than depth-dependent and, over the depth range of CCSD MH, do not fit the popular model of heat production decreasing exponentially with increasing depth. The measured heat flow decreases with depth from similar to 75 mW m(-2) near the surface to similar to 66 mW m(-2) at a depth of 4600 m. High heat flow anomalies occur at similar to 1000 and similar to 2300 m, and low anomalies occur at 3300-4000 m. A preliminary two-dimensional numerical model suggests that both radiogenic heat production and thermal refraction due to structural heterogeneity are at least partially responsible for the vertical variation of heat flow in CCSD MH.
WOS关键词	EAST-CENTRAL CHINA ; MAIN HOLE ; DABIE MOUNTAINS ; SOUTH-CHINA ; GEOCHEMICAL CHARACTERISTICS ; SIERRA-NEVADA ; HIGH-PRESSURE ; CRUST ; PROJECT ; PROFILE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000253533900001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69124]
专题	中国科学院地质与地球物理研究所
通讯作者	He, Lijuan
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA 3.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	He, Lijuan,Hu, Shengbiao,Huang, Shaopeng,et al. Heat flow study at the Chinese Continental Scientific Drilling site: Borehole temperature, thermal conductivity, and radiogenic heat production[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2008,113(B2).
APA	He, Lijuan.,Hu, Shengbiao.,Huang, Shaopeng.,Yang, Wencai.,Wang, Jiyang.,...&Yang, Shuchun.(2008).Heat flow study at the Chinese Continental Scientific Drilling site: Borehole temperature, thermal conductivity, and radiogenic heat production.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,113(B2).
MLA	He, Lijuan,et al."Heat flow study at the Chinese Continental Scientific Drilling site: Borehole temperature, thermal conductivity, and radiogenic heat production".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 113.B2(2008).