Abstract

Several speakers have referred to the applicability of the magnetic method of geophysical prospecting in areas of pyrrhotite bodies. Experience in the Kokomo district, Colorado, suggests that a word of caution is necessary. Massive bodies of pyrrhotite occur in the Kokomo district as replacement bodies in limestone. The U. S. Bureau of Mines, in the course of a preliminary investigation of geophysical work in that area, made magnetic measurements to determine whether or not the presence of these known pyrrhotite bodies could be detected.

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