Journal of Groundwater Science and Engineering Vol.3 No.3 Sept . 2015
再爱我一次吧gw.iheg 213
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Corresponding authors. E-mail:
Geochemical genesis of geothermal waters from the Longling hydrothermal area, Yunnan, Southwestern China
GUO Qing-hai 1*, ZHANG Xiao-bo 1, LIU Ming-liang 1, LI Jie-xiang 1, ZHOU Chao 1, ZHANG Can-hai 2,
小网ZHU Ming-cheng 2, GUO Wei 1, WANG Yan-xin 1
1
鲨鱼羹State Key Laboratory of Biogeology and Environmental Geology & School of Environmental Studies, C
hina University of
Geosciences, Wuhan 430074, China.
丽江属于哪个省2
非主流火星文符号
Hydropower Development Corporation of Upper Yellow River (Ltd.), Xining 810008, China.
Abstract: Longling is characterized by a wide distribution of hydrothermal areas, among which the Banglazhang hydrothermal system is the most geothermally active. Banglazhang is marked by intensive hydrothermal activities including hot springs, geyrs, fumaroles and hydrothermal explosions. The geothermal waters from the Longling region are mainly HCO 3-Na type with low but comparable SO 4 and Cl concentrations. Calculations bad on a variety of chemical geothermometers and a K-Ca geobarometer indicate that the Banglazhang hydrothermal system has much higher subsurface temperature and CO 2 pressure compared to the other systems such as Daheba, Dazhulin and Huangcaoba. However, geothermal water samples collected from all the alternative hydrothermal areas are either partially equilibrated with rervoir minerals or are immature. The silica-enthalpy relationships of Banglazhang geothermal waters indicate the prence of a deep geothermal fluid with an enthalpy value and silica concentration of 945 J/g (up to around 2
20 °C) and 339 mg/L. Our work indicates the Banglazhang area is a promising source in terms of long-term utilization of hydrothermal resources.
Keywords: Geothermal water; Geochemical genesis; Geothermometer; Geobarometer; Deep geothermal fluid; Longling; Banglazhang
相声艺术Introduction君王城上竖降旗
Longling is located adjacent to Tengchong, the most extensive volcanic geothermal area in China (TONG Wei and ZHANG Ming-tao, 1989), and is also characterized by the occurrence of many hydrothermal areas such as Banglazhang, which is the largest and most active with a total area of around 0.2 km 2
(Fig. 1). The Longling region, including the Banglazhang geothermal field, belongs to the Baoshan Prefecture of Yunnan Province in southwestern China. Various manifestations of hydrothermal activities can be obrved in Banglazhang, including hot springs,美丽神话简谱
small-scale geyrs, fumaroles and intensive
hydrothermal alterations. A ries of hydrothermal explosions have also been recorded from the nort
hwestern part of the Banglazhang field after a large-scale Longling earthquake in 1976, resulting in the formation a hot spring with the highest outlet temperature (97 °C) among all Banglazhang springs (LIU Yong-tao, 2009). However, a comprehensive understanding of the geological origin of the Longling hydrothermal systems (including Banglazhang) is lacking and the rervoir process occurring below the fields are not fully understood. This paper aims to delineate the genesis of the Longling geothermal waters through a geochemical survey of the region.
