|Quadrangle map, 1:250,000-scale||BN|
|Quadrangle map, 1:63,360-scale||A-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on the crest of a narrow ridge on the north side of Dillon Creek at an elevation of about 1,700 feet. Dillon Creek is a west headwater tributary of Pargon River. This is locality 80 of Gamble (1988).|
Geologic descriptionGossan float from near calc-silicate hornfels outcrops contains azurite, bornite (?), chalcopyrite, and malachite. Two grab samples contain 100 ppm Ag each, 700 and 110 ppm Cd, greater than 2 % Pb, 3.4 % and 8,000 ppm Zn, and 12 and 14 ppm Sb (Gamble, 1988). There is also some malachite staining in a felsic dike near this locality (Briskey, 1983). This occurrence, and several others in this part of the Bendeleben A-4 quadrangle, are in high grade metamorphic rocks that are structurally above or peripheral to the crosscutting Pargon pluton. The Pargon pluton is mostly granodiorite and assumed to be Cretaceous in age (Till and others, 1986). It was emplaced at shallower depths than the more deep-seated Bendeleben pluton to the east. The metamorphic rocks peripheral to the western Pargon pluton are also intruded by small, felsic dikes and plugs including quartz porphyry and muscovite granite.
|Geologic map unit||(-163.76964352306, 65.2212777118836)|
|Mineral deposit model||Zn-Pb skarn? or Polymetallic vein? (Cox and Singer, 1986; model 18c? or 22c?).|
|Mineral deposit model number||18c? or 22c?|
|Age of mineralization||Cretaceous; this occurrence is probably related to emplacement of the Pargon pluton which is assumed to be Cretaceous in age.|
|Alteration of deposit||Oxidation of sulfides has occurred.|
|Workings or exploration||No workings are known at this locality.|
|Indication of production||None|
Briskey, J.A., 1983, Summary of field observations on Seward Peninsula mineral deposits: U.S. Geological Survey, unpublished administrative report, 34 p.
Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||3/15/1999|