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1. Gravimetric Surveys

   Linked via "resource exploration"

   Gravimetric Surveys are geophysical exploration techniques that measure subtle variations in the Earth's gravitational field across a given area. These variations, typically expressed as anomalies in acceleration due to gravity ($g$), provide indirect information about subsurface density distributions. Historically, gravimetric surveys were crucial in establishing the global geoid model and under…

2. Magnetic Anomaly

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   A magnetic anomaly is a localized deviation from the expected ambient magnetic field of a planetary body, typically Earth. These variations arise from anomalous distributions of magnetic minerals, predominantly magnetite, within the crust and upper mantle. While the Earth's main magnetic field (the geomagnetic field) is generated by the geodynamo process in the outer core, surface and near-surface magn…