Description
During the 2019 field season, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted 1:100,000-scale geologic mapping and sampling of a 1,900-square-mile area of the eastern Tanacross Quadrangle. The area lies approximately 15 miles east of Tok and 12 miles north of Northway, Alaska. The area is of present and historical interest for its potential mineral resources, including porphyry copper-molybdenum-gold, intrusion-related gold, volcanogenic massive sulfides, and rare-earth-element enriched mineralization. This dataset provides major-oxide and trace-element geochemical data from rock samples collected throughout the map area. The results include six samples with gold in excess of 0.030 parts per million (ppm) in several different locations, including a sample with 0.068 ppm Au (19JEA004) collected near Honks, a sample with 0.064 ppm Au (19RN359) from a silicified and tourmaline- and pyrite-altered dike near Mount Fairplay, and a sample with 0.063 ppm Au and 35.8 ppm Ag (19TJN005) collected about half a mile northeast of Move. Additionally, a sample from a tourmaline-altered dike from a road cut near Mount Fairplay has 66.9 ppm Ag (19RN372), and a sample of a tourmaline-altered wall rock surrounding the dike contains 26.7 ppm Ag and 1,220 ppm Pb (19RN371). Samples collected at Mount Fairplay are particularly enriched in rare earth elements (REE), reaching almost 1,000 ppm total REE (samples: 19KS368, 19AW318). The analytical data tables associated with this report are available through the Alaska Geochemistry database (https://maps.dggs.alaska.gov/geochem). For a direct link to this data release, see http://doi.org/10.14509/30267.
Resources
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| ASCII tabular files | Unknown | CSDGM IMPORT ERROR: No digtinfo/formcont | Open resource |
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Tags
- analyses
- analyses and sampling
- analytical lab results
- analytical results
- base metals
- beaver creek
- bedrock
- bedrock geology
- big creek
- chemistry
- chicken creek
- critical minerals
- damundtali lake
- deep creek
- economic geology
- economic study
- exploration
- gardiner creek
- geochemical data
- geochemical surveys
- geochemistry
- geologic
- geology
- gold prospect
- goodrich prospect
- heavy metals
- honks prospect
- igneous rocks
- lab methods
- ladue prospect
- ladue river
- logging cabin creek
- major oxides
- mcarthur creek
- mccord creek
- metals
- metamorphic rocks
- metasedimentary rocks
- metavolcanic rocks
- methods
- mineral assessment
- mineral deposit
- mineral development
- mineral localities
- mineralogy
- mineral prospect
- mineral resources
- minerals
- mining
- minor oxides
- moosehorn ridge
- mount fairplay
- mount fairplay prospect
- non-metals
- ore deposit
- oreo prospect
- ores
- plutonic rocks
- plutons
- pushbush prospect
- rare earth elements
- resource assessment
- resource information
- resources
- sample location
- scottie creek
- strategic minerals
- swamp creek
- trace elements
- trace geochemical
- trace metals
- volcanic rocks
- yellow water creek