The Grass Gulch is a gold mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Grass Gulch MRDS details
Site Name
Primary: Grass Gulch
Commodity
Primary: Gold
Location
State: Alaska
District: Nome
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Placer Au-PGE
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Gold
Comments
Comment (Workings): Workings / Exploration = A 150-foot by 300- or 400-foot pit removed the main deposit by 1903 and most of the rest of the deposit was mined out by 1909 (Collier and others, 1908; Henshaw, 1910).
Comment (Geology): Geologic Description = Grass Gulch is one of several small headwater tributaries of Dexter Creek (NM303) that head in areas where high-level auriferous gravels have been mined (for example, NM246 and NM247). The Grass Gulch placer was small but very rich, and the entire 15 feet of rounded-pebble gravel and some clay was gold-bearing. The deposit apparently was worked out by 1903 from a 150-foot by 300- or 400-foot pit (Collier and others, 1908). Gold was also recovered from fractured and creviced marble bedrock. Overburden was only 2 feet of moss and soil, some of the gravel was frozen, and granite clasts were uncommon in the gravel (Collier and others, 1908; Moffit, 1913). Much of the placer gold in the headwaters of Dexter Creek, including Grass Gulch, is probably derived from reworking of the high-level gravels.
Comment (Deposit): Model Name = Alluvial placer Au (Cox and Singer, 1986; model 39a).
Comment (Reference): Primary Reference = Collier and others, 1908
Comment (Exploration): Status = Probably inactive
Comment (Geology): Age = Quaternary.
References
Reference (Deposit): Henshaw, F.F., 1910, Mining in Seward Peninsula: U.S. Geological Survey Bulletin 442, p. 353-371.
Reference (Deposit): Moffit, F.H., 1913, Geology of the Nome and Grand Central quadrangles, Alaska: U.S. Geological Survey Bulletin 533, 140 p.
Reference (Deposit): Collier, A. J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000.
Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
