LETTER TO THE EDITOR May 7, 2016
I greatly enjoy Robert Font’s, CPG- 03953, “Test Your Knowledge” piece in the TPG magazine. In the current issue, question #4 asks us to determine the value of a very nice-sized gold nugget. As a gold geologist, this was right up my alley. Not being familiar with the unit “slugs,” I set about calculating the value differently, and came out with a different answer. In the published calculations, the factor of 16 ounces per pound was used, however, those are avoirdupois ounces. Gold is sold in troy ounces, and there are only 14.5833 per pound. The following are my calculations:
First, I converted the volume of gold to cubic centimeters: (2.54 cm/ inch)³ = 16.387064 cm³/inch³ x 3 inch³ = 49.161192 cm³
Next, I multiplied by gold’s density (19.3 g/cm³) to get the grams of gold: 49.161192 cm³ x 19.3 g/cm³ = 948.81 g Au
Next, I converted the mass to troy
ounces: 948.81 g Au/31.1034768 g/troy oz = 30.50498 troy oz Au
Then I multiplied by the price of
gold per troy ounce to determine the value: 30.50498 troy oz x $1100/troy oz = $33,555.48
A very nice nugget indeed!
Edward E. Gates CPG-10902 Geologist
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AIPG or 2219892’ Laura Scheid to Lead
Minneapolis Environment Office at WSP|Parsons Brinckerhoff
April 29, 2016, Minneapolis, MN — Laura Scheid, MEM-0834, will man- age the Minneapolis environment office of WSP|Parsons Brinckerhoff, a global engineering and professional services firm, as the new general manager.
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Minneapolis environment team, which provides services in such areas as environmental investiga- tion, remediation, compliance and due-diligence.
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Ms. Scheid has nearly 19 years of experience in geology, hydrogeology, environmental geology and geophys- ics. At WSP|Parsons Brinckerhoff, she has managed petroleum and chlo- rinated solvent investigations, devel- oping cost effective, environmentally sound and risk-based remedial strat- egies, achieving regulatory closure and reducing client’s environmental liabilities and most recently served as a senior technical manager.
A certified professional geolo-
gist in Minnesota, Indiana, Kansas, Wisconsin and Wyoming, Ms. Scheid received an MS degree in geology from Wright State University and a BS in geology from the State University of New York College at Fredonia. She is a member of Minnesota Groundwater Association and the American Institute of Professional Geologists, serving on the Executive Committee for the local Minneapolis chapter.
18 TPG •
Jul.Aug.Sep 2016
www.aipg.org
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