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Gold/Mining/Energy : Medinah Mining Inc. (MDHM)

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Jun 3 1:07 PM EST

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To: TomNY who wrote (5952)	9/4/1998 4:35:00 PM
From: Mike Gold	Read Replies (1) of 25548

Been doing a little research today.... On porphyry deposits at the local university. The journal of Economic Geology is your best bet for research on this-very interesting. Read a couple of detailed descriptions on the geology of Andacollo covering Daytons/MDIN's claims there and associated vein/placer/mantos deposit and the associated copper porphyry deposit. Also looked at porphyry deposits in central and northern Chile. I am attempting to guess what we have at Lapangue compared to all geology models in Chile. First off Chile has, by far, the largest porphyry deposits in the world. The largest copper porphyry are in Northern Chile. Gold porphyry' such as the big Aldebaran deposit are actually quite a bit smaller than the massive copper porhyry's. These are located in a belt that runs North/South through Chile. Lapangue is outside this belt to the West. Andicollo is also outside the belt-looks like Lapangue may represent a southern extentsion of the gold belt that formed the Andicollo belt. None of the geology at Andicollo, or the other porphyrys in central or Northern geology are consistent with Lapangue although there is many similarities between the three. Most interesting is that Lapangue formed near a "First-order boundary between tectonic segments". The Alebaran and Refugio deposits also formed near such a boundary. The mantos/vein structure that Andicollo has seems to be present at Lapangue. The extreme alternation/violence of the intrusive event seems similar to the porphyrys in Northern Chile. The diatreme breccia pipe is completely absence in the other Chile porphyry's but present in porphyry's in the phillipines. All in all, I believe we have something quite unique and can hardly wait for some of the drill results.

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