Khayyam

Mine, Active

Alternative names

Kiam
Cayenne

Commodities and mineralogy

Main commodities Ag; Au; Cu; Zn
Other commodities Pb
Ore minerals chalcopyrite; copper; gahnite; magnetite; pyrite; pyrrhotite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale B-2
Latitude 55.29603
Longitude -132.39288
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Khayyam Mine is incorrectly located on the USGS 1:63,360-scale topographic map. It is at an elevation of about 2,500 feet, about 0.3 mile southwest of the mine symbol on the topographic map and about 0.3 mile east-northeast of the center of section 7, T. 76 S., R. 86 E. This location is accurate.

Geologic setting

Geologic description

The first claims were staked on the deposit at the Khayyam Mine in 1898 and most of the development work took place between 1901 and 1907 (Brooks, 1902; Wright and Wright, 1908; Roppel, 1991; Maas and others, 1995). The mine has 8 adits with a total of about 1,800 feet of underground workings, and numerous pits, trenches, and open cuts. The mine was serviced by aerial and surface trams that connected to the head of McKenzie Inlet. The mine produced 177,769 pounds of copper, 1,711 ounces of silver, and 129 ounces of gold in 1907. In 2007, The Niblack Mining Corp. acquired the Khayyam Mine and the Stumble-on prospect (CR13) and they are being explored together as the Cayenne property (Niblack Mining Corp., 2008). In 2007, Niblack carried out geologic mapping, collected rock samples, and did a geophysical ground, resistivity survey along 2.5 kilometers of line. Their samples (at the Khayyam?) included a 2-meter chip sample of massive sulfides that contained 0.88 percent copper, 9.66 percent zinc, 6.2 grams of silver per tonne, and 0.30 gram of gold per tonne. Several large boulders from the mine dump contained up to 14.6 percent zinc, 15.4 percent copper, 109 grams of silver per tonne, and 5.72 grams of gold per tonne.
Recent detailed mapping (Barrie, 1984; Barrie and Kyle, 1988) indicate that the deposits at the Khayyam Mine are stratiform, massive-sulfide lenses in Late Proterozoic or Cambrian metamorphic rocks of the Wales Group. The host rocks are mainly schist of volcanic origin. The main units are: felsic plagioclase-quartz-chlorite-biotite schist; intermediate (hornblende-quartz-)chlorite-plagioclase schist; and mafic (chlorite-)hornblende-plagioclase schist. The rocks consistently strike about N75W and dip steeply to the north and south. Minor amounts of garnet, sericite, stilpnomelane, and epidote are possibly related to hydrothermal alteration from a nearby Cretaceous diorite intrusion.
The deposit consists of at least 6 massive sulfide lenses in a 200-foot- thick layer of mafic and intermediate schist that grades laterally into felsic schist. Individual massive-sulfide lenses are up to 22 feet thick and can be traced for up to 230 feet along strike. The lenses consist of 50-95 percent pyrite with varying amounts of chalcopyrite, sphalerite, and pyrrhotite. Gahnite occurs in the schist near the massive sulfide layers. Copper, gold, and silver are distributed irregularly through the deposit; zinc is enriched at the periphery. The deposit is associated with coarse, fragmental volcanic rocks that were at or near hydrothermal, submarine vents. The ore lenses characteristically have chloritic alteration in their footwall, and the mafic and intermediate schist is silicified near the vents. Recent detailed geochemical and isotopic work by Slack and others (2002) confirm that the deposit is of Late Proterozoic or Cambrian age.
The deposit was extensively sampled by the U.S. Bureau of Mines in 1944 and 1945 (Fosse, 1946). They defined an inferred resource of 84,000 tons of material that contains an average of 1.71 percent copper, 0.93 percent zinc, 0.06 ounce of gold per ton, and 0.30 ounce of silver per ton. Banner Mining Company drilled 14 holes in 1971 at the Khayyam Mine and 11 holes at the Mammoth (Stumble-On) prospect (CR130). Cominco Exploration mapped and sampled the property in 1972 and 1973. Homestake Mining Company examined the property in 1975 (Hite, 1976). More recently, the deposit was sampled by the U.S. Bureau of Mines (Maas and others, 1995), who collected 41 samples. Their best values were 2.14 parts per million (ppm) gold, 43.7 ppm silver, 9.5 percent copper, 1.66 percent zinc, and minor lead; most values were much lower.
Geologic map unit (-132.394558622473, 55.2956710863377)
Mineral deposit model Besshi massive-sulfide deposit (Cox and Singer, 1986; model 24b).
Mineral deposit model number 24b
Age of mineralization Massive sulfide deposit in Late Proterozoic or Cambrian metamorphic rocks.
Alteration of deposit The ore lenses characteristically have chloritic alteration in their footwall, and the mafic and intermediate schist is silicified near the vents.

Production and reserves

Workings or exploration
The first claims were staked on the deposit at the Khayyam Mine in 1898 and most of the development work took place between 1901 and 1907 (Brooks, 1902; Wright and Wright, 1908; Roppel, 1991; Maas and others, 1995). The mine has 8 adits with a total of about 1,800 feet of underground workings, and numerous pits, trenches, and open cuts. The mine was serviced by aerial and surface trams that connected to the head of McKenzie Inlet. The deposit was extensively sampled by the U.S. Bureau of Mines in 1944 and 1945 (Fosse, 1946). Banner Mining Company drilled 14 holes in 1971 at the Khayyam Mine and 11 holes at the Mammoth (Stumble-On) prospect (CR130). Cominco Exploration mapped and sampled the property in 1972 and 1973. Homestake Mining Company examined the property in 1975 (Hite, 1976). The deposit was sampled by the U.S. Bureau of Mines in the mid-1990s (Maas and others, 1995).
In 2007, The Niblack Mining Corp. acquired the Khayyam Mine and the Stumble-on prospect (CR013) and they are being explored together as the Cayenne property (Niblack Mining Corp., 2008). In 2007, Niblack carried out geologic mapping, collected rock samples, and did a geophysical ground, resistivity survey along 2.5 kilometers of line.
Indication of production Yes; small
Reserve estimates The U.S. Bureau of Mines estimated an inferred resource of 84,000 tons of material that contains an average of 1.71 percent copper, 0.93 percent zinc, 0.06 ounce of gold per ton, and 0.30 ounce of silver per ton (Fosse, 1946).
Production notes The mine produced 177,769 pounds of copper, 1,711 ounces of silver, and 129 ounces of gold in 1907.

References

MRDS Number A010158

References

Barrie, C.P., 1984, The geology of the Khayyam and Stumble-On deposits, Prince of Wales Island, Alaska: University of Texas at Austin, M.A. thesis, 171 p.
Hite, J.B., 1976, Khayyam project, Prince of Wales Island, Alaska: Homestake Mining Company, 4 p. and maps. (Unpublished reports held as files 6810.2, 6811.03, and 681.04, Anaconda Collection, American Heritage Center, University of Wyoming, Laramie.)
Niblack Mining Corporation, 2008, Cayenne, introduction: http://www.niblackmining.com/s/Cayenne.asp (as of May 5, 2008).
Roppel, Patricia, 1991, Fortunes from the earth: Manhattan, Kansas, Sunflower University Press, 139 p.
Slack, J.F., Shanks, W.C. III, Karl, S.M., Ridley, W.I., and Bittenbender, P.E., 2002, Geochemical and sulfur isotope compositions of Late Proterezoic and early Paleozoic volcanogenic massive sulfide deposits, Prince of Wales Island and vicinity, southeastern Alaska (abs.): Geological Society of America, Abstracts with Programs, v. 34 (6), p. 113.
Reporters D.J. Grybeck (Port Ludlow, WA)
Last report date 6/5/2008