After spending much of my geological career in Wyoming with sporadic sojourns to other parts of the lower 48 and Alaska, I had some success in finding mineral deposits such as a significant colored gemstone deposits at Palmer Canyon and Grizzly Creek, Wyoming, a world-class gold deposit (with six other geologists) at Donlin Creek, Alaska, and a major gold district in the Rattlesnake Hills, Wyoming. When I began searching, Wyoming had many overlooked mineral deposits and it likely has many more to be found.
Most gold-bearing quartz veins found in the district were fracture fillings in faults enclosed by crushed quartz zones along their margins. Since the host rocks were often extensively weathered, portions of the veins stood out as positive, resistant, outcrops. The gold-bearing veins ranged from a few inches wide to the vein at the Gowan mine that was as much as 12 feet wide.
There are several mines and prospects in the district. Some of these include Bishop's Knoll, Callahan (34°12'21"N; 111°22’55”W), Crackerjack, Delaware (34°10'49"N; 111°22’20”W), Eighty-five, Excursion, Gowan, Gold Rock, Golden Wonder, Lincoln, Little Green (34°11'11"N; 111°23’48"W), Little Maude (34°10'41"N; 111°22’41”W), Maggie, Mankin, Midget (34°9'48"N; 111°21’32”W), Oxbow, Payrock (34°12'40"N; 111°22’5”W), Rocky Ford (34°12'1"N; 111°22’18”W), Silver Butte, Silver King (34°13'34"N; 111°21’45"W), Single Standard (34°11'48"N; 111°22’8”W), Summit, Thompson, Zulu, and White Mountain (34°16'3"N; 111°24’12"W). A few properties appear to have been prospected over relatively large areas since the second world war such as the Golden Wonder, Maggie, Oxbow, and Zulu. These, in particular, should be examined for large tonnage gold mineralization. And these and other veins could provide opportunities for nugget hunters as well as for detrital gold downslope from the veins.