Placer gold mining dredge1/3/2024 ![]() ![]() The gold in the auriferous glacial deposits was at least partly derived from gold-bearing alluvium in the ancestral Snake River. The offshore marine glacial deposits have been mapped by high-resolution seismic studies, first by Tagg and Greene (1973), then, using refined instruments and techniques, by Graul and others (1989). ![]() The glacial deposits are roughly centered on the projection of Snake River, before it makes an abrubt easterly turn to its present mouth. Gold also occurs in lag deposits formed from weakly auriferous glacial drift and outwash far from the modern beach deposits. There are potential complications with this interpretation, but these are beyond the scope of this summary.? Some of the offshore gold is derived from the abrasion platform immediately offshore of the modern beach. The origin of the deposits is complex and considered to be intimately related to the glacial history of the area (Hopkins and others, 1960). From mean lower low tide, the auriferous deposits extend seaward for about 2 miles. From about 1960 to 1991, and especially from 1987 to 1990, there has been significant exploration and gold production. Geologic Description = Gold occurs in offshore placer deposits off the coast of Nome, particularly from a point west of the mouth of the Nome River to near Penny River. ![]()
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