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Public mining in Oaxaca, Mexico
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AndreyWhiteB

Joined: 11 Oct 2024
Posts: 2

Posted: Oct 16, 2024 16:54 Post subject: Re: Public mining in Oaxaca, Mexico

Matt_Zukowski wrote:

Gneiss is too high a metamorphic grade to host garnets.

This link is to the mindat page for Oaxaca https://www.mindat.org/loc-14688.html. This page lists one locality for garnets Zacatepec, Oaxaca, Mexico https://www.mindat.org/gallery.php?loc=14688&min=8597.

I would like to caution you about obtaining permission from the landowner before doing any prospecting.

Hi Matt,

Thank you very much for the valuable information. It has been incredibly helpful in understanding the geology of the region.

Regarding Peter Megaw’s insightful quote:

“There are also some wonderful exposures of skarns along the coastal beaches with great ventifacts where blowing sand has carved out calcite from between garnet crystals.”

This is fascinating, especially the reference to coastal skarns. Skarns, which are the result of chemical exchanges between hot fluids and carbonate rocks, can be mineral-rich, with garnets often being a prominent feature. The ventifacts mentioned (stones shaped by wind-driven sand) add an interesting natural dynamic to the geological landscape, where calcite has been eroded, leaving garnet crystals exposed.

Could you provide approximate locations where these coastal exposures can be found? It would be wonderful to know specific beaches or areas that feature these skarn formations for further exploration.

Thanks again for the great insight!

Best regards,
Andrei

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