The white chip

"A caravan of hopefuls, armed with a map of the legendary Lost Dutchman gold mine, go in search of their fortune."
"The Lost Dutchman was the most fabled gold mine of the 19th century. An unlikely caravan of a banker, miner, two merchants, a butcher and a smuggler find the exhausted mine and a sealed-off entrance to its rich lode. The wealth is there for the taking--smack in the middle of a volcano that smokes and rattles at will."
"The Lost Dutchman was the most fabled gold mine of the Old West. Ever since Jacob Walzer struck gold in the Superstition Mountains of southwestern Arizona, hundreds of hopefuls had risked everything to comb the deadly mountains for it--and many never came back. Finally an unlikely caravan made up of a banker, a seasoned miner, two merchants, a butcher, and a smuggler found the exhausted mine--and a cleverly sealed-off entrance to its rich lode. The dizzying wealth was theirs for the taking. If they could retrieve it from the middle of an active volcano."@en
"A banker organizes a search for gold in Arizona which turns violent when a mine is found containing gold beyond anyone's wildest dreams. As the prospectors fight, the mountain prepares to let loose its volcano. The hero is prospector Chuck Brannigan, the heroine his fiancee."