Hagelbargers Pass

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Ag; As; Mo; Zn
Ore minerals gold; jordisite; pyrite
Gangue minerals quartz; smectite-illite; stilbite

Geographic location

Quadrangle map, 1:250,000-scale MK
Quadrangle map, 1:63,360-scale A-3
Latitude 58.2295
Longitude -154.7477
Nearby scientific data Find additional scientific data near this location
Location and accuracy 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.

Geologic setting

Geologic description

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).
Geologic map unit (-154.749754087188, 58.2288092392916)
Mineral deposit model Polymetallic vein, epithermal gold vein (Cox and Singer, 1986; model 22c, 25).
Mineral deposit model number 22c, 25
Age of mineralization Late Tertiary or younger; the veins are in the volcanic rocks of the Aleutian volcanic arc.
Alteration of deposit Wall rocks are propylitically altered and contain disseminated pyrite.

Production and reserves

Workings or exploration Apparently only sampling by government geologists.
Indication of production None

Additional comments

This occurrence is in Katmai National Monument.

References