Geologic descriptionThe rocks in the vicinity of this occurrence are predominantly Paleozoic greenschist-facies black carbonaceous quartzite (Dusel-Bacon and others, 1998). Approximately three-quarters of a mile to the south, these rocks are in fault contact with Paleozoic amphibolite-facies metamorphic rocks (Foster, 1976). Sulfides occur within buff-colored, celsian (barium-silicate) -bearing quartzite. The sulfides, in decreasing order of abundance, are sphalerite, pyrite, galena, and chalcopyrite (Dusel-Bacon and others, 1998). Celsian-bearing quartzite from this site and another nearby occurrence (EA076) contain between 1.6 and 3.6 percent barium, 1.8 and 2.7 percent zinc, and 1,040 ppm and 3,980 ppm lead (Dusel-Bacon and others, 1998). Dusel-Bacon and others (1998) interpret this occurrence is interpreted to be a sedimentary-exhalative massive sulfide occurrence. |