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At least 217 records · Page 12Linked to original sources
USGS1976

Mineral resources map of the Tanacross Quadrangle, Alaska

Areas favorable for the occurrence of two types of mineral deposits are delineated on the map. Known deposits and occurrences are also shown on the map and available data on them are provided in table 1. Information from the known deposits combined with geologic, geochemical, geophysical, and earth satellite data presented in the other components of the Tanacross folio provide the basis for the selection of favorable areas. However because bedrock exposure is poor in the Tanacross quadrangle, types of deposits other than those now known to occur may eventually be found, and boundaries of the area delineated as favorable may change as more information, particularly from drilling, is obtained.

Alaska↗
USGS1962

A new occurrence of beryllium minerals on the Seward Peninsula, Alaska

Beryllium in the form of chrysoberyl was found at a new locality on the public domain on the Seward Peninsula. The beryllium is associated with altered dikes and marmorized limestone veined with fluorite-tourmaline-chrysoberyl veinlets. Although the chrysoberyl is fine grained and intergrown intricately with the fluorite and tourmaline, it has been separated and identified by X-ray diffraction. Specimens of ore selected randomly from areas of fluoritized limestone contain beryllium in the range .01 to 3.3 percent BeO. The area warrants detailed mapping and sampling, which will be done by the U.S. Geological Survey in 1962.

Alaska↗