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首页> 外文会议>Geothermal Resources Council Annual Meeting >Geothermal GIS Coverage of the Great Basin, USA: Defining Regional Controls and Favorable Exploration Terrains
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Geothermal GIS Coverage of the Great Basin, USA: Defining Regional Controls and Favorable Exploration Terrains

机译：伟大的盆地地热GIS覆盖范围美国：定义区域控制和有利的勘探地形

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A geographic information system (GIS) of geothermal resources, built last year for the state of Nevada, is being expanded to cover the Great Basin, USA. Data from that GIS is being made available to industry, other researchers, and the public via a web site at the Great Basin Center for Geothermal Energy, Reno, Nevada. That web site features a search engine, supports ArcExplorer for on-line map construction, and provides downloadable data layers in several formats. Though data collection continues, preliminary analysis has begun. Contour maps of geothermal temperatures, constructed using geothermometer temperatures calculated from a Great Basin geochemical database compiled by the Geo-Heat Center, reveal distinctive trends and patterns. As expected, magmatic-type and extensional-type geothermal systems have profoundly different associations, with magmatic-type systems following major tectonic boundaries, and extensional-type systems associating with regionally high heat flow, thin crust, active faulting, and high extensional strain rates. As described by earlier researchers, including Rowen and Wetlaufer (1981) and Koenig and McNitt (1983), high-temperature (>100°C) geothermal systems appear to follow regional northeast trends, most conspicuously including the Humboldt structural zone in Nevada, the "Black Rock-Alvord Desert" trend in Oregon and Nevada, and the "Newcastle-Roosevelt" trend in Utah and Nevada. Weights-of-evidence analyses confirm a preference of high-temperature geothermal systems for young northeast-trending faults, but the distribution of geothermal systems correlates even better with high rates of crustal extension, as measured from global positioning system (GPS) stations in Nevada. A predictive map of geothermal potential based only on areas of high extensional strain rates and high heat flux does an excellent job of regionally predicting the location of most known geothermal systems in Nevada, and may prove useful in identifying blind systems.
机译：在去年为内华达州建造的地热资源的地理信息系统（GIS）正在扩大，以涵盖美国的伟大盆地。来自该GIS的数据是通过在Nevada Geyovermal Energy，Reno，Nevada Geyovermal Energy的Web网站上的网站提供。该网站具有搜索引擎，支持用于在线地图结构的Arcexplorer，并以多种格式提供可下载的数据图层。虽然数据收集继续，但初步分析已经开始。地热温度的轮廓图，使用由地理热中心编制的大盆地地球化学数据库计算的地热计温度构建，揭示了独特的趋势和模式。正如预期的那样，岩浆型和伸展型地热系统具有深刻的不同关联，具有岩浆型系统之后的主要构造边界，以及与区域高热流，薄的地壳，主动故障和高延伸应变率相关的延伸型系统。如早期的研究人员所述，包括Rowen和Wetlaufer（1981）和Koenig和McNitt（1983），高温（> 100°C）地热系统似乎遵循区域东北趋势，最明显地包括内华达州的洪堡结构区，俄勒冈州和内华达州的“黑色岩石 - 奥维德沙漠”趋势，以及犹他州和内华达州的“纽卡斯尔罗斯福”趋势。权重证实证实了高温地热系统对年轻的东北趋势故障的偏好，但地热系统的分布甚至更好地带有高地壳延伸率，从内华达州的全球定位系统（GPS）站测量。仅基于高延伸应变率和高热量通量的地质潜力的预测地图是在区域预测内华达地区最着名地热系统的位置的优异工作，并且可以证明在识别盲系统中。

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