A sluice would require the next water velocity for gold concentration than that equipped by such a gradual steam gradient. All of that lineation you are taking a look at on Google Earth is the metamorphosed sedimentary and volcanic rock beds which were tilted ninety levels (kind of) and now sitting on finish. The lineation is prominently expressed in the Miners Delight Formation, a thick rock unit formed largely of meta-graywacke. Transfer your stylus to 42°29’10"N; 108°40’18"W simply east of Atlantic Metropolis for a wonderful aerial view of lineation. Based on historic records, the first report of gold at South Move was made by a trapper with the American Fur Company in 1842. The situation of his discovery is believed to have been Strawberry Creek, east of Rock Creek. Throughout a current reconnaissance research of the property, the writer also identified a doubtless extension of the mineralized zone that had been down-dropped to the east of the known mineralized zone, indicating that this deposit has even higher potential. After starting reconnaissance at South Move within the 1980s, I used to be awarded a collection of COGEOMAP grants from the US Geological Survey, which led me to a almost decade of geological mapping of the 400 mi2 greenstone belt, its mines, and gold.

Hausel, W.D., Marlatt, G., and Neilson, E., 1992, Reconnaissance geochemical and geological studies on the treasured metal and gemstones potential of southern Wyoming: Geological Survey of Wyoming Open File Report, in preparation. Different gemstones of be aware embody giant iolite deposits along with many other gemstones. For example, the South Pass greenstone belt is flanked by two giant paleoplacers known as the Twin Creek (Antweiler and others, 1980) and Oregon Buttes paleoplacers (Love and others, 1978; Hausel and Love, 1991), and huge areas of the greenstone belt are additionally overlain by additional paleoplacers. Nephrite has been found at quite a few localities in central Wyoming together with the Prospect Mountains of the southern Wind River Mountains, the Granite Mountains, the Seminoe Mountains, the northern Laramie Mountains, and has also been present in fanglomerates derived from these areas. Historic studies point out that wealthy gold specimens were found in Rock Creek. Ogden, P.R.,1979, The geology, main aspect chemistry, and petrogenesis of the Leucite Hills volcanic rocks, Wyoming: PhD dissertation, University of Wyoming, Laramie, 137 p. I mapped the 2 largest diamond-bearing kimberlite districts in the US (Iron Mountain and State Line) and later mapped the largest lamproite field in North America (Leucite Hills).

The diamond-bearing kimberlites in the State Line district had been initially acquired by companies within the late 1970s and early 1980s, and gem-quality diamonds up to 28.Three carats in weight were recovered. A number of other nuggets ranging in weight up to 5 ounces have also been described (Hausel, 1991). Most nuggets within the State are rounded typical of detrital transport, although Day and others (1988) report slivers and hairs of gold from gravels within the Lewiston district. Placers that proceed to yield nuggets include Rock Creek (42°29'11"N; 108°42’25"W), Spring Gulch (42°31'59"N; 108°40’43"W), Large Atlantic Gulch (42°29'54"N; 108°42’31"W), Meadow Gulch (42°27’49"N; 108°47’9"W) and components of the Sweetwater River. During a 1987 mining operation on Smith Gulch (a tributary of Rock Creek), prospectors Hank Hudspeth and Buddy Presgrove recovered about 20 ounces of gold per week, and periodically hit pay streaks yielding 20 ounces in a day. The two recovered about 20 ounces of gold per week in an area that arm chair prospectors claimed had no gold or was all ready mined out. At South Go, Flathead Sandstone conglomerates were explored for gold, though the paleocurrent instructions (into the greenstone belt) point out restricted gold content. With out the usage of dredging, trommel plants, pumps, or hydraulic mining, placer operations within Rock Creek would have been restricted and largely ineffective because of the stream’s gradual gradient (2°) that is not favorable for gold recovery by sluice.

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