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首页> 外文会议>Geothermal Resources Council Annual Meeting >Evidence for a Magmatic Source of Heat for the Steamboat Springs Geothermal System Using Trace Elements and Gas Geochemistry
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Evidence for a Magmatic Source of Heat for the Steamboat Springs Geothermal System Using Trace Elements and Gas Geochemistry

机译：使用微量元素和天然气地球化学对汽船春季地热系统进行岩浆热源岩石源的证据

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摘要

The objective of this project is the development of a representative geochemical database for a comprehensive suite of elemental and isotopic parameters (i.e., beyond the typical data suite) for geothermal fluids in the Great Basin. Preliminary assessment suggests that there are significant differences between magmatic-driven and extensional geothermal systems. In particular, fluids in magmatic systems have higher concentrations of arsenic and higher ratios of Li/Cl, B/Cl, and Ce/Cl than fluids from extensional systems. Once understood in the context of Great Basin geothermal systems, such differences can be utilized to more effectively explore for, assess the potential of, and develop exploitation strategies for these two types of systems. Magmatic-driven systems are, in general, more favorable targets for power production than extensional systems because of a higher geothermal temperature gradient. Steamboat Springs, NV provides a test case for this approach. There has been debate over the nature of the Steamboat Springs geothermal system, but the trace element and gas geochemical data are most consistent with magmatism as a driving heat mechanism. Similar trace element investigations, coupled with other geological parameters, may help to identify magmatic-driven systems elsewhere within the Great Basin.
机译：该项目的目的是开发代表地球化学数据库，用于全面的元素和同位素参数（即，超出典型数据套件），用于大盆地的地热流体。初步评估表明，岩石驱动和扩展地热系统之间存在显着差异。特别地，岩浆系统中的液体具有比来自延伸系统的流体更高的Li / Cl，B / Cl和Ce / Cl的砷和更高比率。曾经在大盆地地热系统的背景下理解，这种差异可以利用来更有效地探索，评估这两种系统的潜力和开发利用策略。通常，岩石驱动的系统通常，由于地热温度梯度较高，通常是电力产生的竞争力的目标。 Steamboat Springs，NV为这种方法提供了测试用例。对汽船弹簧地热系统的性质进行了辩论，但微量元素和气体地球化学数据与岩浆广告最符合作为驱动热机理。与其他地质参数相结合的类似微量元素调查可能有助于识别较大盆地其他地方的岩石驱动的系统。

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