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Hagelbargers Pass Occurrence, Bristol Bay District, Kodiak Island Borough, Alaska, USA

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This occurrence is in Katmai National Monument.
Location: This occurrence is about 3.5 miles northwest of Hagelbargers Pass near the headwaters of Katmai River. It is at an elevation of about 1,300 feet in the SW1/4 sec. 31, T. 22 S., R. 33 W., of the Seward Meridian. The location is accurate within one-half mile.
Geology: This occurrence is in Upper Tertiary, propylitically-altered, volcanic rocks, that contain banded quartz veins, generally one to five mm thick and finely disseminated pyrite (Church, Riehle, and Goldfarb, 1993). The veins contain quartz, smectite-illite mixed-layer clay, and stilbite. Samples generally contain from 0.15 to 0.45 parts per million (ppm) gold with a maximum value of 2.2 ppm, and up to to 300 ppm arsenic, 200 ppm molybdenum, and 3 ppm silver. The dark color of the quartz bands is due to finely dispersed jordisite (MoS2) (Church, Riehle, and Goldfarb, 1993). The occurrence may represent veining above a concealed low-F porphyry Mo deposit (Church, Riehle, and Goldfarb, 1993).
Workings: Apparently only sampling by government geologists.
Age: Late Tertiary or younger; the veins are in the volcanic rocks of the Aleutian volcanic arc.
Alteration: Wall rocks are propylitically altered and contain disseminated pyrite.

Commodities (Major) - Au; (Minor) - Ag, As, Mo, Zn
Development Status: None
Deposit Model: Polymetallic vein, epithermal gold vein (Cox and Singer, 1986; model 22c, 25).

Mineral List



5 entries listed. 4 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Church, S.E., Riehle, J.R., and Goldfarb, R.J., 1993, Interpretation of exploration geochemical data for the Mount Katmai quadrangle, and adjacent parts of the Afognak and Naknek quadrangles, Alaska: U.S. Geological Survey Bulletin 2020, 67 p., 3 plates, scale 1:250,000. Church, S.E., Riehle, J.R, Magoon, L.B., and Campbell, D.L., 1992, Mineral and energy resource assessment maps of the Mount Katmai, Naknek, and western Afognak quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF 2021-F, 22 p., 2 sheets, scale 1:250,000.

 
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