Hey Art,
Thanks for the Co-Ordinates. Might have to take a trip out there when the snow melts. Just a little FYI for that area. The Fallon NAS range is South of Hwy.50 next to the "Fairview" district. That canyon you listed is a few miles north of 50 in the south end of Dixie Valley (BLM?). Across the valley to the NE is the old ghost town of "Wonder". A silver town from the late 1800,s.
The Dixie Valley is very thermally active with hot springs and Geothermal power plants. The area was heavily prospected in the late 1800,s due to the proximity of other lode finds nearby.
The article stated the cave was NW of Sand Mountain. I did a little exploring out that way a few years ago digging up some Banded Rhyolite north of Green Mountain and found a pretty good size mine shaft there. It might have been a Rockhounders hole or the Highgrade was removed as there was nothing but the Rhyolite in the tailings.
HH
Steve