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首页> 外文会议>Geothermal Resources Council Annual Meeting >Geophysical Investigations of a Blind Geothermal System in Southern Gabbs Valley, Nevada
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Geophysical Investigations of a Blind Geothermal System in Southern Gabbs Valley, Nevada

机译：内华达州南部盲目地热系统的地球物理调查

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Southern Gabbs Valley in west-central Nevada, is a blind geothermal system located 5 km north of the Gabbs Valley Range and ～15 km southeast of the Don A. Campbell geothermal power plant. Previous geologic, geophysical, and geochemical studies in the Nevada play fairway project had identified a favorable setting for a blind geothermal system, documented elevated subsurface temperatures, and established the structural framework of the area. Further high resolution geophysical surveys were therefore conducted to aid in characterizing both the intrabasinal structure of the area and potential geothermal system. A total of 480 gravity stations, 300 km of ground magnetic data, and 24 magnetotelluric (MT) stations were collected. These data support the previous interpretation that the thermal anomaly occurs at the intersection of two faults bounding an intra-basin gravity high, and also show that a conductive zone (potential cap) and magnetic low coincide with this anomaly. If the magnetic low is a result of hydrothermal alteration that has demagnetized the surrounding rock, this would suggest that this is a relatively long lived geothermal system, adding to the viability of the resource.
机译：内华达州西部南加布斯谷是一个盲目地热系统，位于加布巴斯山谷距离北部5公里，东南达湾坎贝尔地热发电厂〜15公里。先前的地质学，地球物理和地球化学研究在内华达州播放航道项目中已经确定了盲目地热系统的有利环境，记录了升高的地下温度，并建立了该地区的结构框架。因此，进行了进一步的高分辨率地球物理调查，以帮助表征该地区和潜在地热系统的内部结构。收集了总共480个重力站，接地磁性数据300公里，24个磁函数（MT）站。这些数据支持先前的解释，即热异常发生在束盆内重力中高的两个故障的交叉点，并且还表明导电区（电位盖）和磁性低与该异常重合。如果磁性低是对周围岩石脱落的水热改变的结果，这表明这是一个相对较长的居住地热系统，增加了资源的生存能力。

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