A kimberlite deposit has been found in the Iron Mountain district of Wyoming, about 55 km northwest of Cheyenne.
The garnets recovered from the kimberlite were classified as either G9 and G10 following electron microprobe analysis
In addition, the Wyoming State Geological Survey has also mapped three kimberlite dyke complexes, the largest of which has a strike length of 4 km.
Tests to determine the region’s potential for economic deposits of diamonds are expected to continue.
Meanwhile, the state geological survey reports that exploration for platinum group metals (PGM) has risen slightly. Exploration is mainly centred around mafic-ultramafic complexes in southeastern Wyoming, including the past-producing New Rambler mine in the Medicine Bow mountains and a layered intrusive near Lake Owen. Cumulus sulphide mineralization has been identified in at least 12 statigraphic horizons at the intrusive.
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