Data and results for GIS-based identification of areas that have resource potential for lode gold deposits in Alaska

Dates

Publication Date: 2021-06-24

Citation

Karl, S.M., Kreiner, D.C., Case, G.N.D., Labay, K.A., Shew, N.B., Granitto, M., Wang, B., and Anderson, E.D., 2021, Data and results for GIS-based identification of areas that have resource potential for lode gold deposits in Alaska: U.S. Geological Survey data release, https://doi.org/10.5066/P9CAM3F9.

Summary

This data release contains the analytical results and evaluated source data files of geospatial analyses for identifying areas in Alaska that may be prospective for different types of lode gold deposits, including orogenic, reduced-intrusion-related, epithermal, and gold-bearing porphyry. The spatial analysis is based on queries of statewide source datasets of aeromagnetic surveys, Alaska Geochemical Database (AGDB3), Alaska Resource Data File (ARDF), and Alaska Geologic Map (SIM3340) within areas defined by 12-digit HUCs (subwatersheds) from the National Watershed Boundary dataset. The packages of files available for download are: 1. LodeGold_Results_gdb.zip - The analytical results in geodatabase polygon feature classes which contain [...]

Summary

This data release contains the analytical results and evaluated source data files of geospatial analyses for identifying areas in Alaska that may be prospective for different types of lode gold deposits, including orogenic, reduced-intrusion-related, epithermal, and gold-bearing porphyry. The spatial analysis is based on queries of statewide source datasets of aeromagnetic surveys, Alaska Geochemical Database (AGDB3), Alaska Resource Data File (ARDF), and Alaska Geologic Map (SIM3340) within areas defined by 12-digit HUCs (subwatersheds) from the National Watershed Boundary dataset. The packages of files available for download are:

1. LodeGold_Results_gdb.zip - The analytical results in geodatabase polygon feature classes which contain the scores for each source dataset layer query, the accumulative score, and a designation for high, medium, or low potential and high, medium, or low certainty for a deposit type within the HUC. The data is described by FGDC metadata. An mxd file, and cartographic feature classes are provided for display of the results in ArcMap. An included README file describes the complete contents of the zip file.

2. LodeGold_Results_shape.zip - Copies of the results from the geodatabase are also provided in shapefile and CSV formats. The included README file describes the complete contents of the zip file.

3. LodeGold_SourceData_gdb.zip - The source datasets in geodatabase and geotiff format. Data layers include aeromagnetic surveys, AGDB3, ARDF, lithology from SIM3340, and HUC subwatersheds. The data is described by FGDC metadata. An mxd file and cartographic feature classes are provided for display of the source data in ArcMap. Also included are the python scripts used to perform the analyses. Users may modify the scripts to design their own analyses. The included README files describe the complete contents of the zip file and explain the usage of the scripts.

4. LodeGold_SourceData_shape.zip - Copies of the geodatabase source dataset derivatives from ARDF and lithology from SIM3340 created for this analysis are also provided in shapefile and CSV formats. The included README file describes the complete contents of the zip file.

Contacts

Originator :: Susan M Karl, Douglas C Kreiner, George N Case, Keith A Labay
Publisher :: U.S. Geological Survey
Metadata Contact :: Alaska Science Center
Point of Contact :: Alaska Science Center
Distributor :: U.S. Geological Survey - ScienceBase
USGS Mission Area :: Energy and Minerals
SDC Data Owner :: Alaska Science Center

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LodeGold_Analysis_Alaska.xml “Metadata for Alaska lode gold mineral potential mapping” Original FGDC Metadata	View	22.59 KB	application/fgdc+xml
LodeGold_Results_gdb.zip “Geodatabase of analysis results for lode gold deposits in Alaska”		513.02 MB	application/zip
LodeGold_Results_shape.zip “Shapefiles of analysis results for lode gold deposits in Alaska”		960.63 MB	application/zip
LodeGold_SourceData_gdb.zip “Geodatabases used to analyze for lode gold deposits in Alaska”		727.18 MB	application/zip
LodeGold_SourceData_shape.zip “Shapefiles of select data used to analyze for lode gold deposits in Alaska”		43.43 MB	application/zip

Extension: AK_LodeGold_Results_mapservice.zip
AK_LodeGold_Results_mapservice.sd “Service definition file of analysis results for lode gold deposits in Alaska”		415.43 MB
thumbnail.png “Estimated resource potential for lode gold deposits in Alaska”		14.91 KB

Related External Resources

Type: Related Primary Publication

Karl, S.M., Kreiner, D.C., Case, G.N.D., Labay, K.A., Shew, N.B., Granitto, M., Wang, B., and Anderson, E.D., 2021, GIS-based identification of areas that have resource potential for lode gold in Alaska (ver. 1.1, October 2021): U.S. Geological Survey Open-File Report 2021–1041, 75 p., 9 plates, https://doi.org/10.3133/ofr20211041.	https://doi.org/10.3133/ofr20211041

Purpose

The purpose of this spatial analysis is to examine and understand the distribution of different lode gold deposit types in Alaska. This GIS-based analysis uses published datasets of mineral resource data, geochemistry, geology, and aeromagnetic surveys to identify areas that may be prospective for this type of mineral deposit. The analysis also identifies areas with limited data and could be used to highlight areas needing additional studies. A full description of the analysis process and results is published in the related publication Karl and others, 2021.

Data and results for GIS-based identification of areas that have resource potential for lode gold deposits in Alaska

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