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Geologic map of the Tok River area, Tanacross A-5 and A-6 quadrangles, eastern Alaska Range, Alaska

Metadata Updated: September 11, 2021

Preliminary Interpretive Report PIR 2017-3, Geologic map of the Tok River area, Tanacross A-5 and A-6 quadrangles, eastern Alaska Range, Alaska, provides 1:63,360-scale geologic mapping of the bedrock units and surficial deposits in the Tok River area, Tanacross A-5 and A-6 quadrangles, eastern Alaska Range, Alaska. The Tok River geologic mapping project is part of a multi-year effort focusing on improving the publicly available geological and geochemical data and assessing the mineral potential of the Tanacross quadrangle. The project focused on detailed mapping, identification, sampling, and characterization of Devonian-Mississippian metamorphic rocks, Triassic and Cretaceous intrusions, surficial geology, and modern geochemical characterizations of skarn, vein, and volcanogenic massive sulfide (VMS) hosted mineralization. The DGGS Mineral Resources section spent 321 person-days in the field in 2015 and 2016 to conduct approximately 540 square miles of 1:63,360-scale geologic mapping and sampling in the Tok River area of central Alaska. The new geologic map improves understanding of the area's geology, structural history, and mineral potential. This area includes exposures of Devonian-Mississippian metamorphic rocks, metamorphosed Triassic gabbroic intrusions, and Cretaceous granodiorite intrusions and basaltic andesite lava flows. The area lies between the Delta mineral belt to the west, which has been the focus of exploration into VMS, and skarn deposits of the Tetlin project to the east. The area also contains numerous inactive and possibly active faults and multiple stages of deformation and magmatism, which are critical for understanding the geologic history of the eastern Alaska Range. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/29722.

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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Dates

Metadata Date August 28, 2021
Metadata Created Date November 10, 2020
Metadata Updated Date September 11, 2021
Reference Date(s) January 1, 2017 (publication)
Frequency Of Update notPlanned

Additional Metadata

Resource Type Dataset
Metadata Date August 28, 2021
Metadata Created Date November 10, 2020
Metadata Updated Date September 11, 2021
Reference Date(s) January 1, 2017 (publication)
Responsible Party Alaska Division of Geological & Geophysical Surveys (Point of Contact)
Contact Email
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 -142.984986
Bbox North Lat 63.267395
Bbox South Lat 62.981981
Bbox West Long -144.028172
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id cfaf496f-eb44-4c41-bd67-d9a68f62f27f
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": [[[-144.028172, 62.981981], [-142.984986, 62.981981], [-142.984986, 63.267395], [-144.028172, 63.267395], [-144.028172, 62.981981]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2015-01-01
Temporal Extent End 2017-01-01

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