Distribution and Aggregation Mechanism of Geothermal Energy in Gonghe Basin

YAN Wei-de; GAO Xue-zhong; GAO Xue-zhong; ZHANG Shu-heng; MA Yue-hua; SHANG Xiao-gang; GUO Shou-yun

2013 Vol. 46, No. 4

Article Contents

Article navigation > Northwestern Geology > 2013 > 46(4): 223-230

Next Article Previous Article

YAN Wei-de, GAO Xue-zhong, GAO Xue-zhong, ZHANG Shu-heng, MA Yue-hua, SHANG Xiao-gang, GUO Shou-yun. Distribution and Aggregation Mechanism of Geothermal Energy in Gonghe Basin[J]. Northwestern Geology, 2013, 46(4): 223-230.

Citation:

Distribution and Aggregation Mechanism of Geothermal Energy in Gonghe Basin

1.
School of Environmental Studies, China University of Geosciences, Wuhan 430074, China;Key Laboratory of Hydrogeology and Geothermal Geology of Qinghai Province, Hydrogeology, Engineering and Environmental Geology Survey Institute of Qinghai Province, Xi'ning 810008, China
2.
School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
3.
Key Laboratory of Hydrogeology and Geothermal Geology of Qinghai Province, Hydrogeology, Engineering and Environmental Geology Survey Institute of Qinghai Province, Xi'ning 810008, China

Received Date: 18 March 2013

Revised Date: 29 July 2013

Publish Date: 15 December 2013

Abstract

Abstract

Gonghe Basin of Qinghai Province, which locates in northern Tibetan Plateau, is a faulted basin formed since mesozoic era. Around the basin is controlled by large active faults; inside the basin is the accumulation of large thickness of Quaternary and Neogene strata, the exposed thickness is up to 900-1440m, and the substrate is formed by Indosinian granite. Exploration results display that the value of heat flow is high inside the basin. Besides, the basement granite geothermal gradient is greater than 5℃, thermal anomaly is obvious. According to the broad band seismic observation data on the Qinghai-Tibet Plateau, there is a 150km low-velocity zone on the east Kunlun orogen where Gonghe Basin lies in. It is associated with the mantle plume in deep mantle of the Bayan Har orogen, which is characterized by huge low-velocity abnormity. The low-velocity zone extends to the earth crust and forms an abnormal area of heat flux at different parts with 1-40km below the earth's surface in Gonghe Basin and its surroundings, accounting for the forming of geothermal energy based on abundant hot-dry rocks and geothermal water in shallow part of the basin. It is significant not only for the city's heating system but also for electricity generation.
- seismic tomography profile /
- mantle plume /
- geothermal energy /
- geothermal water /
- hot-dry rock

FullText(HTML)

References

姜枚, 王有学, 钱辉.造山的高原——青藏高原及其邻区的宽频地震探测与地壳上地幔结构[M]. 北京:地质出版社, 2009.

Google Scholar

Jiang Mei, Wang Youxue, Qian Hui. An orogenic plateau-broad band seismic detection and mantle structure of shallow crust of Qinghai-Tibet Plateau and its surroundings[M]. Geological Publishing House, Beijing, 2009.

Google Scholar

许志琴, 姜枚, 杨经绥, 等. 青藏高原地幔结构:地幔羽、地幔剪切带及岩石圈俯冲片的拆沉[J].地学前缘, 2004, 11(4):329-343.

Google Scholar

Xu Zhiqin, Jiang Mei, Yang Jingsui, et al. Mantle structure of Qinghai-Tibet Plateau: Mantle plume, mantle shear zone and delamination of lithospheric slab[J].Earth Science Frontiers, 2004, 11(4):329-343.

Google Scholar

吴向农, 赵国柱, 李德发, 等. 青海省区域地质志[M]. 北京:地质出版社, 1991.

Google Scholar

Wu Xiangnong, Zhao Guozhu, Li Defa, et al. Qinghai regional topography[M]. Geological Publishing House, Beijing, 1991.

Google Scholar

张雪亭, 杨生德, 杨站君. 青海省板块构造研究[M]. 北京:地质出版社, 2007.

Google Scholar

Zhang Xueting, Yang Shengde, Yang Zhanjun. Research of plate tectonics of Qinghai province[M]. Geological Publishing House, Beijing, 2007.

Google Scholar

牛树英, 孙爱群, 王宝德. 地幔热柱与资源环境[M]. 北京:地质出版社, 2007.

Google Scholar

Niu Shuying, Sun Aiqun, Wang Baode. The mantle plume and environment[M]. Geological Publishing House, Beijing, 2007.