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New geophysical maps and data available for Wrangellia Area


(Fairbanks, AK) – The Division of Geological & Geophysical Surveys today is releasing airborne geophysical survey data and maps for its 1,322-square-mile Wrangellia survey in the Talkeetna Mountains, Healy, and Mt. Hayes quadrangles. The new survey is adjacent to previous airborne-geophysical Iron Creek, Valdez Creek, and Southern Delta River surveys. The survey area is located in the Valdez Creek and Delta River mining districts, about 150 miles north-northeast of Anchorage and roughly centered on the Denali Highway crossing of the Susitna River. DGGS completed the data acquisition in 2013.

The Wrangellia survey data is expected to be useful for resource exploration, planning, and public land-use management. Airborne geophysics helps to characterize bedrock types, project geology between sparse outcrops, and identify vegetation-covered, anomalous geophysical signatures that might be associated with lode mineralization.

The Wrangellia survey area contains prospects representing several different mineral deposit types, including magmatic-type nickel, copper, and platinum-group elements. More than 500,000 troy ounces of placer gold has been produced in the Valdez Creek mining district; many of these placer deposits are within the survey area.

Funding for this survey was provided by the Alaska Legislature as part of a Strategic and Critical Mineral Capital Improvement Project and the surveys are conducted through the division’s Airborne Geophysical/Geological Mineral Inventory (AGGMI) program. A portion of the survey data was contributed by Millrock Exploration Corporation, 719 E 11th Avenue, Anchorage, Alaska 99501.

The aeromagnetic and electromagnetic geophysical survey data will be released in DVD and paper formats at 10:30 a.m. on Thursday, Jan. 30 at the DGGS office, located at 3354 College Road in Fairbanks, Alaska 99709-3707. Also at 10:30 a.m., digital files of the data and maps will be available at no cost on the division’s website at www.dggs.alaska.gov. The data and maps can be found through links provided on the order forms on the website. Electromagnetic-anomaly maps and an interpretive project report will be available at a later date.

DVDs and the individual map sheets are available for the cost of reproduction and can be inspected and purchased at the DGGS office. Call 907-451-5020 to place phone orders. Mail orders should be sent to the DGGS office at the above address or via fax (907-451-5050) or e-mail (dggspubs@alaska.gov). A location map and order form are available on the DGGS website:

Wrangellia order form: http://www.dggs.alaska.gov/pubs/project-orderform/1207

These materials also will be available for inspection beginning Feb. 14 at the Alaska Resources Library and Information Services (ARLIS), located at 3211 Providence Drive, Anchorage, AK 99508 (907-272-7547), and at the Historical Collection of the Alaska State Library, located in the State Office Building in Juneau (open 1-5 p.m., Monday through Friday; 907-465-2927).

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