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This project was jointly funded by the State of Alaska's Strategic and Critical Minerals Assessment project (part of DGGS's Airborne Geophysical/Geological Mineral Inventory program [AGGMI]), a USGS Mineral Resources Assessment Grant G16AS00003, and the USGS National Cooperative Geologic Mapping Program, STATEMAP component, under award number G16AC00182 for 2016. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. We acknowledge Heidi Lingenfelter and Joe Bovee representing Ahtna, Inc., James Mery of Doyon Limited, and Mentasta Village for providing access to private lands in the map area. U.S. Bureau of Land Management (BLM) Glennallen Field Office and Tom Beaucage of (BLM) Eastern Field Office (Fairbanks) assisted us with permitting on BLM-managed lands. We thank Lawrence K. Freeman, James V. Jones III, Erin Todd, Samuel Dashevsky, Peter Illig, and others for enlightening geological discussions. Lawrence Freeman and David Reioux participated in the 2015 fieldwork. Jeff Benowitz and Paul Layer of the University of Alaska Fairbanks Geochronology Lab conducted the 40Ar/39Ar analyses and assisted us in their interpretation. Dick Reger and Jennifer Athey gave timely and constructive technical reviews. We appreciate the warm hospitality and logistical support of John and Jill Rusyniak of Log Cabin Wilderness Lodge, and we thank Soloy Helicopters LLC pilots Sam Gawaith and Frank Ross for skilled and safe flying.
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 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.
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Are there legal restrictions on access or use of the data?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).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.
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.
| Data format: | geodatabase |
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https://doi.org/10.14509/29722 |