SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Gold/Mining/Energy : Global Platinum & Gold (GPGI)
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Tim Hall who wrote (5588)4/3/1998 11:34:00 AM
From: Ed Fishbaine  Read Replies (1) of 14226
 
Thall

I quote from Peter Fischer's 1991 compendious study of the Oro Grande and Weaver Creek for Inco. As I understand it Inco did not follow through on this very favorable report because of its own internal organizational problems at the time.

Oro Grande

History

"The Oro Grande was discovered in the 1870s and has been intermittently worked until the 1940s primarily as a gold mine. Around 1900 it was
one of the richest gold mines in the Black Rock district of Arizona. A few essential points about the mine are listed here, additional information is contained in a collection of old newspaper clippings reports and letters in Global's possession.

. In 1904 the mine is reported to have produced 8600 tons of ore averaging 0.27 opt Au.

. Bullion shipped from the Oro Grande was penalized by the mint in California for its PT and Ag content. The owners had to sign a waiver for the PT content of the ore.

. A 340 ft shaft and several hundred feet of drifts were completed prior to 1910.

. Only a small, stoped portion of the Linear Breccia Zone was mined between surface and the 300 ft level."

Later he states: " It is emphasized that in Global's compilation of their analytical work there exists a wealth (hundreds) of anomalous high grade PGE analyses which are extremely unlikely to be produced by "salting" and therefore should be taken seriously. Although the scatter of the PGE values is extreme and in some cases even the order of magnitude is in question, certain metal ratios are impossible to be manufactured and therefore are considered to reflect natural samples."

In conclusion he reports that PT is the primary precious metal.

"The Oro Grande property is a Pt-Au occurrence in a previously unrecognized and favourable setting. It has unqestionably highly anomalous PT values and very favourable Pt/Pd ratios in several rock types in a brecciated hydrothermally altered mafic complex which is presumed to be underlain by a younger pluton. The property deserves serious attention."

Regards, Ed
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2026 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News