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Platinum—Group Metals

by Henry E. Hilliard
Excerpted from USGS "1998 Annual Review"

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Marketing other minerals recovered while gold mining

Volume is the Key to Success


While recovery rates are important, they must necessarily be secondary to the volume of material processed. Running more material at lower recovery rates is generally preferable to increasing the efficiency of the system.

Gold in Panama


Panama is a long, narrow isthmus, 30,200 square miles in area, that separates Costa Rica from Colombia. It is best noted for the Panama Canal, which is now under the control of the Panamanian government, aided by the United States. The canal bisects the country and is an engineering marvel that was opened in 1914.

Proposal Submitted for Lab at Homestake


Rapid City, S.D. (AP)—Scientists and a team of South Dakotans have submitted a $281 million, five-year plan to turn Homestake Mine in Lead into the world’s largest underground laboratory.

Visionaries, Scoundrels, and Gamblers


Ask leading historians to name Colorado's top 10 builders and the list quickly grows to 50 people. The list includes visionaries, scoundrels and gamblers.

Maitland Bar Nugget to Go On Display


The box sat in a hallway and employees began using it for impromptu cricket games, no knowing what it contained.

Estimating Gold Values in Placer Gravels


The single most important question to be answered when evaluating a placer deposit is: “How much is it worth?” Accurate sampling of placer gravels is essential to obtain a reasonable estimate of the total gold values contained in the deposit.

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