IXL No. 1

Prospect in Alaska, United States with commodities Silver, Gold, Copper, Zinc

Geologic information

Identification information

Deposit ID 10094038
MRDS ID A012354
Record type Site
Current site name IXL No. 1
Alternate or previous names Reliance
Related records 10282768

Geographic coordinates

Geographic coordinates: -130.96675, 55.26475 (WGS84)
Relative position The IXL No. 1 prospect is on the shoreline of Behm Canal about 2.15 miles northeast of Roe Point. The site is in section 22, T. 76 S., R. 95 E., of the Copper River Meridian. It corresponds to loc. 440(1-2) in Maas and others (1995). The location is accurate within 0.1 mile. This record also includes references to the Reliance prospect, which Elliott and others (1978, loc. 104) locate on the shoreline of Behm Canal about a mile northeast of the IXL No. 1.? Also see Additional comments.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Secondary
Zinc Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Pyrrhotite Ore
Sphalerite Ore
Quartz Gangue
Sericite Gangue

Mineral occurrence model information

Model code 91
USGS model code 24b
Deposit model name Massive sulfide, Besshi (Japanese deposits)
Mark3 model number 30

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -130.96675, 55.26475

Comments on the geologic information

  • Geologic Description = The IXL No. 1 prospect area is underlain by an assemblage of undivided Mesozoic or Paleozoic metamorphosed sedimentary, volcanic, and intrusive rocks; and by a stock and dikes of Cretaceous granodiorite and quartz diorite (Berg and others, 1988, p. 21, 22). The undivided assemblage was regionally metamorphosed to amphibolite grade in middle or Late Cretaceous Cretaceous time, and locally remetamorphosed to hornblende hornfels near the contacts of some of the granodiorite and quartz diorite plutons.? the IXL No. 1 deposit consists of stratiform layers of massive sulfides in quartz-sericite schist (Maas and others, 1995, p. 268). Layers of almost pure sulfide are commonly 5-8 inches thick, and combine to form an approximately 8-foot-thick sulfide-rich zone. The sulfides consist chiefly of pyrite, accompanied by pyrrhotite, sphalerite, chalcopyrite, and galena. The massive sulfide layers are approximately parallel to the foliation of the schist, which strikes NW and dips steeply SW to vertical. Pyrite also is finely disseminated in the schist in the hanging wall of the massive sulfide zone. The quartz-sericite schist is in contact with mafic schist or gneiss within a few tens of feet of the prospect.? the IXL No. 1 deposit was discovered in 1898 and developed in the early 1900s by about 65 feet of crosscuts and drifts, and a 33-foot winze (Maas and others, 1995, p. 266). The property was restaked and drilled by private interests in the 1970s. Drill core, probably from that exploration, is located about 2300 feet SE of the IXL No. 1 adit. The deposit was also sampled by Maas and others (1995, p. 268-269) in the early 1990s. ? Also see Workings/exploration.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Mining district

District name Ketchikan

Comments on the workings information

  • Workings / Exploration = The IXL No. 1 deposit was discovered in 1898 and developed in the early 1900s by about 65 feet of crosscuts and drifts, and a 33-foot winze (Maas and others, 1995, p. 266). The property was restaked and drilled by private interests in the 1970s. Drill core, probably from that exploration, is located about 2300 feet SE of the IXL No. 1 adit. The core reveals massive sulfide layers up to 10 feet thick interlayered within a 66-foot-long intercept of various schists, along with quartz lenses that carry pods or streaks of coarse-grained sulfides (Maas and others, 1995, p. 268, 269). The richest 10 feet of a 61-foot section of core contained 2.0 ppm Au, 23.6 ppm Ag, and 1.45% Zn. Other samples of the core contained up to 2.1 ppm Au, 43.7 ppm Ag, 0.57% Cu, 0.67% Pb, and 2.3% Zn. The weighted average of all samples of the core is 800 ppb Au, 23.4 ppm Ag, 0.3% Cu, 0.3% Pb, and 1.1% Zn.? the IXL No. 1 deposit was sampled in the early 1990s by Maas and others (1995, p. p. 268-269). A sample across 4 feet of the stratified zone contained 224 ppb Au, 26.5 ppm Ag, 0.1% Cu, and 1.0% Zn. Select samples of massive sulfide contained up to 130 ppb Au, 98 ppm Ag, 0.2% Cu, 0.7% Pb, and 2.5% Zn.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012354
USGS Alaska Resource Data File ARDF KC107

Bibliographic references

  • Deposit

    Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.

  • Deposit

    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 MF-1807,27 p., scale 1:250,000.

  • Deposit

    Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.

Comments on the references

  • Primary Reference = Maas and others, 1995

General comments

Subject category Comment text
Deposit Model Name = Metamorphosed Besshi massive sulfide? (Cox and Singer, 1986; model 24b)
Deposit Other Comments = This record includes references to the Reliance prospect, which Elliott and others (1978, loc. 104) locate on the shoreline of Behm Canal about a mile north of the IXL No. 1 prospect. The Reliance prospect, staked in 1953 (Maas and others, 1995, p. 266), probably is at the location shown by Elliott and others, but their description apparently is of the IXL No. 1 deposit. If so, other than its year of staking, no other information about the Reliance prospect has been made public.? the IXL No. 1 (and Reliance) prospects are in Misty Fiords National Monument Wilderness.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-JUL-99 H.C. Berg U.S. Geological Survey