anomaly

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The secondary magnetic anomaly and copper target is situated 8km to the east, a result of 301ppmCu was obtained in shallow geochemical drilling.
But whatever exists in the earth that causes the magnetic anomaly may also be a region of enhanced conductivity.
Petuch says he welcomes other theories explaining the Florida magnetic anomaly, but he thinks the impact idea is the only plausible one now in the running.
Red Hill - large magnetic anomaly known to be caused by a mafic intrusive of the Mount Kare Igneous suite, with associated brecciation and gold mineralisation that is currently being artisanally worked by informal miners.
Because the suture runs beneath the Brunswick Magnetic Anomaly -- an area where the earth's magnetic field is unusually weak -- researchers hope that other magnetic anomalies will also turn out to indicate crustal plate boundaries and other important geologic structures.