Mineralogie » Fluoritization in paleozoic biogerms, Tatarstan, Republic

Hello, colleagues!
I'm a post-graduate from Moscow State University, Russia. Now I'm researching the structure and conditions of origin of Menzelinskoe (Мензелинское) oilfield in the northeast of Tatarstan Republic. This oilfield is associated with high carbonate "reef" of upper-devonian-tournais age. So, it is situated in the paraxial depression zone of Kama-kinel channel system and reaches the 381 m height. Having been studying the core material from it I discovered numerous occurence of green fluorite in white recrystallized calcite. Observations were taken through binocular of 0.6-7x zooming, because thin sections had not been prepared yet. :) So, distinct small crystals of fluorite in crystal calcite matrix or thin green films along the borders of organic debri are visible on the surface of core samples. Can you help me, what could cause such mineral association in biogerm carbonates? I consider this fluorite to be of low-temperature hydrothermal origin, but... I'm ebarrassed with the fact that these fluorite agregates are not intercommunicated, they are not located along fractures but their distribution is sporadic.


Thank you!



I didn't find the right solution from the Internet.
References: http://www.carbonet.net/forum/viewtopic.php?t=237

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