Main commodities | Zn |
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Ore minerals | pyrite; sphalerite |
Quadrangle map, 1:250,000-scale | KC |
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Quadrangle map, 1:63,360-scale | B-3 |
Latitude | 55.497 |
Longitude | -130.982 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The approximate location of this occurrence is on the west shore of Behm Canal near Ella Point. The site is in section 33, T. 73 S., R. 95 E., of the Copper River Meridian. It corresponds to loc. 51 in Elliott and others (1978). The location probably is accurate within about 0.5 mile. |
Geologic descriptionThe country rocks near Ella Point consist of pelitic and quartzofeldspathic paragneiss that is intruded by an elongate stock of Cretaceous leucocratic granodiorite and quartz monzonite (Berg and others, 1988). The paragneiss represents marine argillaceous and clastic strata that underwent regional high-grade regional metamorphism in Cretaceous or Tertiary time. The premetamorphic age of the strata is uncertain. Most are probably Paleozoic, but some may be as young as Mesozoic and some as old as Precambrian (Berg and others, 1988; Gehrels and others, 1990; Crawford and others, 2000). According to Berg and Cobb (1967, p. 182), 'A zinc-bearing lode that may be similar to the one at Moth Bay [KC086] is on the west shore of Bradfield Canal near Ella Point, where pyrite and sphalerite reportedly replace sericitic schist.' No other information about this occurrence has been made public. | |
Geologic map unit | (-130.983699039847, 55.4966595396718) |
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Mineral deposit model | Sedimentary exhalative Zn-Pb? (Cox and Singer, 1986; model 31a) |
Mineral deposit model number | 31a? |
Indication of production | None |
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Additional commentsSite is in Misty Fiords National Monument Wilderness. |
MRDS Number | A012318 |
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ReferencesGehrels, G.E., McClelland, W.C., Samson, S.D., Patchett, P.J., and Jackson, J.L., 1990, Ancient continental margin assemblage in the northern Coast Mountains, southeast Alaska and northwest Canada: Geology, v. 18, no. 3, p. 208-211.
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Reporters | H.C. Berg, USGS |
Last report date | 7/1/1999 |