Progress in research on the geothermal resources in Taxkorgan Valley, Xinjiang
SHI Jie, LU Chengxin, LI Qinghai, CHANG Zhiyong
No.2 Hydrogeological and Engineering Geological Team, Xinjiang Bureau of Geology and Mineral Resources Exploration and Development, Changji 831100, China
Abstract：Geothermal geological condition of Xinjiang Taxkorgan Valley was summarized in this paper. The geological structures, geothermal distribution, chemical and isotopic characteristics of geothermal fluid were analyzed. The author also investigated the geothermal formation mechanism, and calculated the geothermal resources and exploitable quantity. The results show that the geothermal resources in the study area are controlled by faults, and the ground temperature changes are obviously consistent with those of caprock, intact bedrock and fault zone (geothermal reservoir). The maximum temperature of measured thermal reservoir is 161 ℃ now, and the calculated temperature of deep geothermal reservoir can reach 222~268 ℃. Besides, the maximum geothermal gradient is 149.20 ℃/100 m. The geothermal fluid is characterized by deep circulation, which is obviously different from shallow water in hydrochemistry and isotopic characteristics. Geothermal fluid is derived from meteoric water and is stored, transported and enriched in fractures and fissures. With the heat supply of radioactive heat and crystallization heat of intrusive rock, the underground fluid continuously exchanges heat and substance with the wall rock. In the wall rock and cover layer of thermal reservoir, heat exchange is mainly in the mode of conduction, and in the heat storage reservoir,heat is mainly in the mode of convection. The stored heat in the geothermal field is 55.919×1011 MJ, and the exploitable quantity of geothermal fluid is 12 593 m3/d, with the heat energy productivity of 77.9 MW. The thermal reservoir of Taxkorgan Valley has shallow buried depth and is easy to be exploited, which has considerable direct and indirect economic value.
史杰, 陆成新, 李清海, 常志勇. 新疆塔什库尔干谷地地热资源研究进展[J]. 中国地质调查, 2018, 5(2): 8-10.
SHI Jie, LU Chengxin, LI Qinghai, CHANG Zhiyong. Progress in research on the geothermal resources in Taxkorgan Valley, Xinjiang. , 2018, 5(2): 8-10.
[1] 沈军,汪一鹏,赵瑞斌,等.帕米尔东北缘及塔里木盆地西北部弧形构造的扩展特征[J].地震地质,2001,23(3):381-389. [2] 李海兵,Valli F,许志琴,等.喀喇昆仑断裂的变形特征及构造演化[J].中国地质,2006,33(2):239-255. [3] 陈杰,李涛,李文巧,等.帕米尔构造结及邻区的晚新生代构造与现今变形[J].地震地质,2011,33(2):241-259. [4] 郑剑东. 青藏高原西北缘地球动力学初探[J].地震地质,1996,18(2):119-127. [5] 胡建卫,庄道泽,杨万志.新疆西南部塔什库尔干地区赞坎铁矿综合信息预测模型及其在区域预测中的应用[J].地质通报,2010,29(10):1495-1503. [6] 乔春贵,周坚鑫,刘伟,等.新疆塔什库尔干地区铁矿航磁异常特征及找矿潜力[J].物探与化探,2012,36(3):350-355. [7] 董连慧,李卫东,张良臣.新疆大地构造单元划分及其特征[C]//第六届天山地质矿产资源学术讨论会论文集.乌鲁木齐:新疆青少年出版社,2008:27-32. [8] Brunel M,Arnaud N,Tapponnier P,et al.Kongur Shan normal fault:Type example of mountain building assisted by extension (Karakoram Fault,eastern Pamir)[J].Geology,1994,22(8):707-710. [9] Robinson A C,Yin A,Manning C E,et al.Tectonic evolution of the northeastern Pamir:Constraints from the northern portion of the Cenozoic Kongur Shan extensional system,western China[J].Geol Soc Am Bull,2004,116(7/8):953-973. [10] Robinson A C,Yin A,Manning C E,et al.Cenozoic tectonics of the NE Pamir,western China:Implications for the evolution of the western end of the Indo-Asian collision zone[J].Geol Soc Am Bull,2007,119(7/8):882-896. [11] 邱楠生,胡圣标,何丽娟.沉积盆地热体制研究的理论与应用[M].北京:石油工业出版社,2004. [12] 罗照华,莫宣学,柯珊.塔什库尔干碱性杂岩体形成时代及其地质意义[J].新疆地质,2003,21(1):46-50. [13] 柯珊,罗照华,莫宣学,等.帕米尔构造结塔什库尔干碱性杂岩同位素年代学研究[J].岩石学报,2008,24(2):315-324. [14] 于晓飞,孙丰月,侯增谦,等.新疆塔什库尔干斯如依迭尔铅锌矿区花岗闪长岩锆石U-Pb定年及其意义[J].岩石学报,2012,28(12):4151-4160. [15] Langelier W F,Ludwig H F.Graphical methods for indicating the mineral character of natural waters[J].J Am Water Works Assoc,1942,34(3):335-352. [16] Wang M H,Lu C X,Chang Z Y.Study on the geochemistry of potential high temperature geothermal resources in Taxkorgan,Xinjiang,China[C]//Proceedings World Geothermal Congress 2015.Melbourne,Australia:[s.n.],2015. [17] Giggenbach W F.Geothermal solute equilibria.Derivation of Na-K-Mg-Ca geoindicators[J].Geochim Cosmochim Acta,1988,52(12):2749-2765. [18] 国土资源部储量司,中国矿业联合会地热开发管理专业委员会,北京市地质工程勘察院,等.GB/T 11615—2010地热资源地质勘查规范[S].北京:中国标准出版社,2011.
2018, Vol. 5 
