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

Metadata Updated: July 31, 2021

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.

Access & Use Information

Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

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ASCII tabular files
CSDGM IMPORT ERROR: No digtinfo/formcont

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Dates

Metadata Date	July 29, 2021
Metadata Created Date	July 31, 2021
Metadata Updated Date	July 31, 2021
Reference Date(s)	January 1, 2019 (publication)
Frequency Of Update	notPlanned

Metadata Source

ISO-19139 ISO-19139 Metadata
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FGDC Original FGDC Metadata
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Harvested from Alaska Division of Geological and Geophysical Surveys

Additional Metadata

Resource Type	Dataset
Metadata Date	July 29, 2021
Metadata Created Date	July 31, 2021
Metadata Updated Date	July 31, 2021
Reference Date(s)	January 1, 2019 (publication)
Responsible Party	Alaska Division of Geological & Geophysical Surveys (Point of Contact)
Contact Email	dggspubs@alaska.gov
Guid
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).
Bbox East Long	-141.002201
Bbox North Lat	63.732058
Bbox South Lat	62.780850
Bbox West Long	-142.519365
Coupled Resource
Frequency Of Update	notPlanned
Harvest Object Id	8b7be4ca-e682-4e3b-9565-282400dd90a6
Harvest Source Id	8f77b6d5-f630-4995-bdf3-0aee7158a7f3
Harvest Source Title	Alaska Division of Geological and Geophysical Surveys
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 Language	eng; USA
Metadata Type	geospatial
Old Spatial	{"type": "Polygon", "coordinates": [[[-142.519365, 62.78085], [-141.002201, 62.78085], [-141.002201, 63.732058], [-142.519365, 63.732058], [-142.519365, 62.78085]]]}
Progress	completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester	True

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