Abstract Different geological and geophysical disciplines have suggested the Wagner Basin as a promising location of geothermal resources. As a reconnaissance tool Magnetotelluric (MT) data were measured at 10 sites along a profile over this basin in the northern Gulf of California. The subsurface distribution of electric resistivity was estimated with two-dimensional smooth inversion using the apparent resistivities and phases from both field polarizations. We found a deep conductor underneath the center of the basin, interpreted as a region of partial melt feeding the accretion zone of this incipient oceanic crust. From six MT sites with close-by heat flow measurements, we also found a positive correlation between the interpreted shallow (first 100 m) low resistivities and high heat flows. This shows that the MT method can be used to map submarine heat sources.

中文翻译：

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墨西哥加利福尼亚湾瓦格纳盆地的大地电磁勘探：轴向岩浆房和热液循环的证据。

摘要 不同的地质和地球物理学科都认为瓦格纳盆地是一个有前景的地热资源区。作为侦察工具，在加利福尼亚湾北部该盆地的剖面沿线的 10 个地点测量了大地电磁 (MT) 数据。使用来自两个场极化的视电阻率和相位，通过二维平滑反演估计电阻率的地下分布。我们在盆地中心下方发现了一个深导体，它被解释为一个部分熔体区域，该区域为这个初期洋壳的吸积带提供营养。从具有附近热流测量的六个 MT 站点，我们还发现解释的浅层（前 100 m）低电阻率和高热流之间存在正相关。