Geologic descriptionThis occurrence consists of veins that contain coarse, white quartz crystals which fill cavities, and euhedral calcite crystals (Eden, 2000). Ankerite, with pyrite, and hematite after pyrite, occurs along the margins of the veins. The veins strike northwest-southeast , dip almost vertically, and are up to one inch thick. Several samples of the veins contain 5 to 58 ppb gold and 15 to 138 ppm arsenic (Kurtak and others, 1999). The samples were taken in quartz veins about 1 inch thick that contain minor pyrite, +/- hematite, +/- siderite. One continuous chip sample from an outcrop, described as a hematite- and pyrite-bearing quartz vein in phyllite, contains 8,301 ppb gold and 1,134 ppm arsenic (Eden, 2000, sample 10650). Eden (2000) notes that the occurrences at this site are extensions of a gold-quartz vein system in the Nolan Creek area (WI101). In general, the mineralization in the Nolan Creek consists of quartz veins with lesser calcite, ankerite and dolomite, arsenopyrite sometimes, and varying amounts of a variety of accessory sulfide and oxide minerals including pyrite, marcasite, chalcopyrite, pyrrhotite, hematite, sphalerite, galena, and rutile. |