Central Seward Peninsula

Region Alaska, Alaska
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Prospectivity analysis for VMS systems has highlighted a belt extending along northern central coast of the Seward Peninsula and along the Kougruk fault zone on the western edge of the Seward Peninsula. Lithology in the belt includes a bi-modal metavolcanic suite and pelitic metamorphosed sedimentary rocks.
Identified resources None.
Production None recorded.
Status Past exploration including local drilling.
Estimated resources None.
Geologic maps Statewide geologic map database; Wilson, Hults and others (2015), scale 1:1,584,000; Till and others (2011), scale 1:500,000.
Geophysical data Mostly (>90%) inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Interlayered bi-modal-felsic metavolcanic suite and marine metasedimentary rocks.
Deposits None.
Evidence from mineral occurrences ARDF occurrences.
Geochemical evidence Sediment and soil anomalies in pathfinder elements including Cu, Ag, Pb, Zn, Cd, or Co. Additional geochemical evidence comes from pan concentrates containing anglesite, cerussite, chalcopyrite, copper sulfide/oxide, galena, or sphalerite. Heavy Mineral concentrates containing Cu, Pb, Zn or Ag.
Geophysical evidence No data.
Evidence from other sources Moderate to high potential defined by prospectivity analysis; Karl and others (2016).
Comments This belt of rocks consists of metamorphosed bi-modal volcanic suites. Occurrences are hosted in felsic components of the package of rocks.
Cover thickness and description Unknown.
Authors Douglas C. Kreiner, James V. Jones, III.
New data needs New geologic mapping, geophysical surveys and well-constrained geochemical sampling.
Geologic mapping and modeling needs Mapping at 1:100,000 scale or better.
Geophysical survey and modeling needs Rank 1 or 2 aeromagnetics over the entire belt.
Digital elevation data needs IfSAR coverage is complete over entire focus area.