Dictionary:High-frequency magnetics (HFMAG)

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{{#category_index:H|high-frequency magnetics (HFMAG)}} Magnetic anomalies of shallow sedimentary origin, often <1 nT, seen in areas of deep magnetic basement. Possible sources include detrital magnetite, diagenetic magnetite, or other minerals possibly related to hydrocarbon microseepage, salt or anhydrite diamagnetism, or fault mineralization.