Calderónite : Pb2Fe3+(VO4)2(OH)

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minID: H5T-KJY

Calderónite : Pb2Fe3+(VO4)2(OH)

This image is copyrighted. Unauthorized reproduction prohibited.
Field of View: 5.5 mm
Largest Crystal Size: 1.0 mm

Calderonite was confirmed by multiple SEM-EDX analyses by Stan Korzeb, Economic Geologist at the Montana Bureau of Mines & Geology, Butte, Montana. It is associated with descloizite in the same specimen and vanadinite in rocks from the same location. The calderonite in these rocks ranges from typical sub-vitreous red-orange to earthy brick red, which is probably partly altered to some iron oxide.

Mineralization here is hosted in the oolitic facies of the Cambrian Meagher limestone. Ore fluids probably came in along several faults, including especially the Mayflower Fault, which juxtaposes Precambrian Belt Supergroup rocks and Cambrian rocks over Cretaceous Elkhorn Mountains Volcanics. The mine reached a depth of 1,582 feet and produced gold from tellurides, primarily in the 1896-1912 time frame, when it was owned by W.A. Clark. Total production was at least 225,000 ounces of gold and 880,000 ounces of silver.

Collected: 1971

This photo has been shown 62 times
Photo added:14th Feb 2018
Dimensions:2666x3063px (8.17 megapixels)
Date/Time of Photo:31st Jan 2018 13:57:57
Software:Snapseed 2.0
Exposure time:1/30s
Focal Length:4mm
Focal Length (35mm film equivalent):28mm
ISO speed:160
View Richard Gibson's Photos View Calderónite Gallery

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