Sharing response from to request for explanation as to why most recent presentation contained a slide which said, Don't forget PORPHYRY'S. Seldom contact managements, never would request inside info nor would I expect to receive such info. This response is not about anything material but the information perhaps is of interest to some.
Hi George,
In the Upper Cretaceous Tireo Formation in the DR (as well as Cuba, Haiti and Puerto Rico) there are a number of porphyry intrusions, several being mineralized. Romero is a hydrothermal plume which is essentially heated fluids rising above a heat source, and precipitating out the gold and copper as the fluids cooled to around 180-220 degrees. The heat source for Romero may well be a porphyry intrusion, intruded along the Caribbean suture between the Caribbean and Atlantic plates. Porphyry intrusions are often mineralized in other parts of the world, particularly with copper and gold, usually at lower grade than Romero, but can be billions of tonnes in size, and some of the world’s largest mines are of this deposit type.
My comment was that, while we are clearly looking for more “Romeros” ie hydrothermal systems, if we come across a porphyry system, we should investigate it, as the copper and gold contained in Romero probably were sourced from such a body. This is especially important for our exploration approach, as we are doing deeper ZTEM geophysics than most, as we are seeking to understand how the mineralization is working along the whole 60 km belt, not just at Romero. Romero was a “blind deposit” ie it does not come to surface, and produced millions of ounces. If we see a large porphyry potential in the geophysics, even if it doesn’t come to surface, we WILL check it out!
I hope that helps
All the best
Bill Fisher
Executive Chairman
GoldQuest
PS if you have any difficulties getting through to the COmpany, email me on my own mail address, and I will respond, as long as I am not wearing my geological hat and am up a mountain, out of touch! B
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