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Naturally occurring asbestos (NOA) develops in predictable geologic settings worldwide. Various geologic units throughout Alaska include rock types that could potentially host naturally occurring asbestos minerals. This report and digital data release show geologic map units throughout Alaska rated according to their interpreted potential to host NOA. To summarize locations of known asbestos occurrences, we searched the U.S. Geological Survey's (USGS's) Alaska Resource Data File (http://ardf.wr.usgs.gov) and Mineral Resource Data System (http://mrdata.usgs.gov/mineral-resources/mrds-ak.html) for references to asbestos in Alaska and compiled the resulting 62 documented asbestos occurrences. To better predict additional...
The Morefield Gem Mine was discovered, and mining began in 1929. During WWII, it was mined for strategic minerals. After the end of 1949, the mine was closed until 1985, and it was reopened as a “find your own gems gem mine” and mined for amazonite. 2015 was the 30th year the mine has been operating as a recreational mining operation. This site is a highly mineralized pegmatite dike having a length of 2000 feet and a projected depth of about 300 feet. It was mined historically for mica, tantalite, amazonite, and massive topaz. It is world-famous for the amazonite. As mining progresses underground, rock is hoisted, stockpiled, and spread on the surface for collecting. As of 2023 the mine is closed. Virginia Department...
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