Major-oxide and trace-element geochemical data from rocks collected in 2019 for the Eastern Tanacross project, Tanacross and part of Nabesna quadrangles, Alaska

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.

Data e Risorse

Campo Valore
access_constraints ["Use Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.", "Access Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below)."]
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contact-email dggspubs@alaska.gov
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dataset-reference-date [{"type": "publication", "value": "2019-01-01"}]
frequency-of-update notPlanned
licence ["The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product."]
metadata-date 2021-07-29
metadata-language eng; USA
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metadata_created 2025-11-23T00:07:01.780388
metadata_modified 2025-11-23T00:07:01.780393
notes 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.
num_resources 9
num_tags 81
title Major-oxide and trace-element geochemical data from rocks collected in 2019 for the Eastern Tanacross project, Tanacross and part of Nabesna quadrangles, Alaska