|Quadrangle map, 1:250,000-scale||IL|
|Quadrangle map, 1:63,360-scale||A-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is at an elevation of about 1,500 feet on the west valley wall of upper Paint River, about 0.8 mile northwest of the junction of Crevice Creek. The prospect is in the SE1/4 SE1/4 sec. 10, T. 12 S. R. 32 W., Seward Meridian. It corresponds to locality 1 of Richter and Herreid, 1965. The location is accurate within 500 feet.|
This prospect consists of skarn in mafic and intermediate volcanic rocks of the Jurassic Talkeetna Formation within a few hundred feet of the contact of the Jurassic Pilot Knob granodiorite (Richter and Herreid, 1965; Detterman and Reed, 1980).The skarn mainly comprises epidote, garnet, actinolite, quartz, magnetite, and chalcopyrite, and the oxidized minerals azurite, chrysocolla, and malachite. The chalcopyrite is generally associated with actinolite and occurs in disseminations and small pods; it is accompanied by pyrite and calcite (Richter and Herreid, 1965). The most abundant ore mineral is magnetite. Richter and Herreid (1965, p. 14) described two lenses or layers of magnetite in epidote-garnet-actinolite skarn. They are as much as 25 feet thick and about 10 feet apart. The deposit is marked by a local ground-based magnetic anomaly. Richter and Herreid's locality is probably the same as Jasper's (1956, p. 9, section II), who reported magnetite float and malachite in an open cut on the steep slope above Paint River.
|Geologic map unit||(-154.641316735125, 59.1428098620999)|
|Mineral deposit model||Iron skarn; possibly copper skarn (Cox and Singer, 1986, models 18d and 18b).|
|Mineral deposit model number||18d, 18b?|
|Age of mineralization||Jurassic, possibly related to Pilot Knob granodiorite.|
|Alteration of deposit||Development of garnet-epidote-calcite-actinolite skarn in calcic volcanic rocks. Oxidation of copper.|
|Workings or exploration||Exploration includes detailed geologic mapping and a ground-based magnetic survey by Richter and Herreid, (1965). There are a few prospect pits in the area.|
|Indication of production||Undetermined|
Detterman, R.L., and Reed, B.L., 1980, Stratigraphy, structure, and economic geology of the Iliamna quadrangle, Alaska: U.S. Geological Survey Bulletin 1368-B, 86 p.
Jasper, M.W., 1953, Preliminary report on copper occurrences on McNeil claim group, Paint River area, Kamishak Bay region: Alaska Territorial Department of Mines Property Examination 103-1, 14 p., 6 sheets.
Jasper, M.W., 1956, McNeil copper claim group, Paint River area: Alaska Territorial Department of Mines Property Examination 103-2, 19 p., 3 sheets.
|Reporters||C.C. Hawley, Hawley Resource Group, Anchorage, Alaska|
|Last report date||6/11/2003|