Julian (ARDF #KC131) Cu

Julian

Prospect, Undetermined

Commodities and mineralogy

Main commodities	Cu

Geographic location

Quadrangle map, 1:250,000-scale	KC
Quadrangle map, 1:63,360-scale	A-6
Latitude	55.16
Longitude	-131.74
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This prospect is known only from U.S. Bureau of Mines (1977) claim records. Its approximate location is at or near sea level, on the north side of the entrance to Dall Bay. The site is in section 29, T. 77 S., R. 91 E., of the Copper River Meridian. It corresponds to loc. 128 in Elliott and others (1978). The location probably is accurate within 0.3 mile.

Geologic setting

Geologic description The country rocks in the area of this prospect consist of an assemblage of undivided Silurian or Ordovician metamorphosed bedded and intrusive rocks that are intruded by stocks and dikes of Silurian trondhjemite (Berg, 1973; Berg and others, 1988), The rocks are cut by a complex system of high-angle faults that mainly strike NE and NW. Locally, they also are permeated by finely disseminated hydrothermal hematite, giving them (especially the trondhjemite) a pink or red hue commonly mistaken for potassium feldspar. According to U.S. Bureau of Mines claim records (1977), this prospect, which appears to be in complexly faulted and hydrothermally altered trondhjemite and/or metamorphic rocks, was staked for copper. No other information about it has been made public.
Geologic map unit	(-131.741677752208, 55.1596536749121)

Geologic description

The country rocks in the area of this prospect consist of an assemblage of undivided Silurian or Ordovician metamorphosed bedded and intrusive rocks that are intruded by stocks and dikes of Silurian trondhjemite (Berg, 1973; Berg and others, 1988), The rocks are cut by a complex system of high-angle faults that mainly strike NE and NW. Locally, they also are permeated by finely disseminated hydrothermal hematite, giving them (especially the trondhjemite) a pink or red hue commonly mistaken for potassium feldspar.

According to U.S. Bureau of Mines claim records (1977), this prospect, which appears to be in complexly faulted and hydrothermally altered trondhjemite and/or metamorphic rocks, was staked for copper. No other information about it has been made public.

Geologic map unit

(-131.741677752208, 55.1596536749121)

Production and reserves

Indication of production	Undetermined

References

MRDS Number	10307669
References Berg, H.C., 1973, Geology of Gravina Island, Alaska: U.S. Geological Survey Bulletin 1373, 41 p. Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map I-1807, 27 p., scale 1:250,000. Elliott, R.L., Berg, H.C., and Karl, S.M.,1978, Map and table describing metalliferous and selected non-metalliferous mineral deposits in the Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-73B, 17 p., 1 sheet, scale 1:250,000. U.S. Bureau of Mines, 1977, Claim map, Ketchikan quadrangle: U.S. Bureau of Mines Map 120, scale 1:250,000.
Reporters	H.C. Berg, USGS
Last report date	7/5/1999