| Quadrangle map, 1:250,000-scale | MM |
|---|---|
| Quadrangle map, 1:63,360-scale | B-2 |
| Latitude | 63.2689 |
| Longitude | -150.8275 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | The Galena Lode (Cobb, 1980, p. 35 [OFR 80-363]) is in the east fork of upper Carlson Creek. Its location is approximate, inasmuch as Moffit's (1933, p. 322) description of its position relative to the nearby Copper Lode (MM156) is ambiguous. Moffit's description does not match the location of the site on Plate 4 of Capps' geologic map of the area (Capps, 1933). For this record, the location is approximately that of the unnamed prospect shown in the east fork of upper Carlson Creek on Capps' Plate 4. It is in the SW1/ 4NW1/4 sec. 16, T. 19 S., R. 17 W., Fairbanks Meridian. The location is probably accurate within 1/2 mile. The Galena Lode is number 34 of Cobb (1972 [MF 366]) and number 43 of MacKevett and Holloway (1977). |
Geologic descriptionThe country rocks at the Galena Lode are Paleozoic, contorted black schist invaded by sill-like masses of Eocene or Oligocene granite porphyry. The prospect is in a narrow wedge of Paleozoic rocks between the McGonagall batholith to the south and the Tertiary or Cretaceous Cantwell Formation to the north (Reed, 1961). The deposit is mainly in contorted schist bounded by steep, NE-striking faults that separate the schist from granite porphyry. The schist is cut by lenticular seams up to a foot thick of quartz that locally contains galena, sphalerite and pyrite. The sulfides also are locally disseminated in the schist. The deposit is probably Oligocene, roughly contemporaneous with emplacement of the McGonagall batholith. The Galena Lode is in the same belt and probably related to polymetallic deposits of the Greenback and Magnet group of prospects (MM173 and MM172). | |
| Geologic map unit | (-150.829747786634, 63.2683900973914) |
|---|---|
| Mineral deposit model | Polymetallic veins (Cox and Singer, 1986; model 22c). |
| Mineral deposit model number | 22c |
| Age of mineralization | The deposit is probably middle Tertiary, roughly contemporaneous with the Eocene or Oligocene emplacement of the McGonagall batholith (Reed and Lanphere, 1974; Cole, 1998). |
| Workings or exploration | The prospect was probably explored by surface pits. It was first staked in about 1930, probably by H. Carlson. It was relocated for gold by Arley Taylor in the mid-1960s and was active in 1972 (Heiner and Porter, 1972, Mt. McKinley quadrangle, serial number 52). |
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| Indication of production | None |
Additional commentsThe Galena Lode is in Denali National Park and Preserve. | |
| MRDS Number | A011215 |
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ReferencesCole, R. B., 1998, Early Tertiary post-subduction volcanism and deformation along the north side of the McKinley fault, Alaska [abs]: Geological Society of America. Abstracts with program, v. 30, p. 177.
Heiner, L.E., and Porter, Eve, 1972, Alaska Mineral Properties, volume 2: University of Alaska, Mineral Industry Research Laboratory Report 24, 669 p.
Reed, B. L., and Lanphere, M. A., 1974, Offset plutons and history of movement along the McKinley segment of the Denali fault system, Alaska: Geological Society of America Bulletin, v. 85, p. 1883-1892.
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| Reporters | C.C. Hawley |
| Last report date | 12/13/2000 |