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首页> 外文会议>Geothermal Resources Council annual meeting >Geophysics at the Milford, Utah FORGE Site: Update on Gravity Surveys and 3D Modeling
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Geophysics at the Milford, Utah FORGE Site: Update on Gravity Surveys and 3D Modeling

机译：犹他州米尔福德FORGE站点的地球物理学：重力测量和3D建模的更新

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New gravity data recently collected at the Utah FORGE site results in a total of over 500 unique, high-precision gravity stations. Previous 2D gravity and preliminary 3D seismic models indicated a trough-like structure in the granitic bedrock surface. However, more data was required to confidently delineate this feature. The new gravity measurements (a refined infilling of coverage) are used in conjunction with legacy gravity data, downhole geophysical logs, laboratory-measured physical properties, and local geologic information to set up the framework for a new 3D geophysical inversion modeling exercise. The geophysical modelling exercise inverts the gravity data in 3D using the land surface and top-of-granite surface as constraints, and rock density measurements as a guide, to obtain a 3D density model that minimizes the misfit between observed and calculated gravity data. In this manner, we use gravity to provide an independent test of the 3D geologic understanding of the FORGE site. The results of the new 3D models are presented in this report.
机译：最近在犹他州FORGE站点收集的新重力数据导致总共500多个独特的高精度重力站。先前的2D重力模型和初步的3D地震模型表明，花岗岩基岩表面有槽状结构。但是，需要更多数据才能自信地描述此功能。新的重力测量值（覆盖范围的精细填充）与传统重力数据，井下地球物理测井，实验室测量的物理特性和本地地质信息结合使用，从而为新的3D地球物理反演建模练习建立了框架。地球物理建模练习使用陆地表面和花岗岩顶部表面作为约束条件，并以岩石密度测量为指导，以3D形式将重力数据求反，从而获得一个3D密度模型，该模型可以最大程度地减小观测到的重力数据与计算得出的重力数据之间的失配。通过这种方式，我们使用重力来提供对FORGE站点的3D地质认识的独立测试。新3D模型的结果显示在此报告中。

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