International Precious Metals takes another crack at Black Rock

A “breakthrough in assaying” has encouraged International Precious Metals (IPMC-C) to begin another pilot plant test program at its Black Rock Extended project in Arizona.

An earlier metallurgical test on a 450-tonne bulk sample (T.N.M., July 29/96) failed to recover any gold or platinum-group metals. The Black Rock property has, in the past, failed to turn up samples with significant gold or platinum grades when standard analytical methods have been used. The company did not specify the nature of the “breakthrough” apart from saying that the leaching process used in earlier tests “failed to produce total material values.”