Gold
Basin
Placer
Information
This information is taken directly from US Geological
Survey Bulletin 1355, Placer Gold Deposits of Arizona,
by Maureen G. Johnson, 1972.
Extent:
The placers in the Gold Basin and Lost Basin districts
are found in three major areas; the east and west
flanks of the Lost Basin Range and the detrital fan
in Gold Basin on the east flank of the White Hills.
The placers on the east flank of the Lost Basin Range
are found in arroyos incised in bajada gravels of
late Miocene and early Pliocene age which cover an
area of 8-10 square miles. Many individuals have dry-washed
the placers at various localities. Five major placer
claims are located along this flank of the range.
These are the Robeson and Joy Lease, the Queen Tut
placer, the Golden Nugget placer, the King Tut placer
and the Lone Jack placer. The King Tut placer was
the most actively mined placer in the area, and the
east flank of the Lost Basin Range is frequently called
the King Tut placer area.
On the west flank of the Lost Basin Range, small-scale
mining of placers found in Quaternary alluvial fans
is still active. These placers occupy an area comparable
in size to the placer ground on the east side of the
range and are located in the eastern rows of T29N
and T30N R17W.
The gold bearing gravels of the Gold Basin district
are found in the arroyos and gulches on the large
detrital fan that slopes eastward from the White Hills
to Hualapai Wash and is traversed by White Elephant
Wash and its tributaries. The Searles placer mine
is in sec 29 T29N R18W.
Production
History:
The placers in the Gold Basin and Lost Basin districts
were first actively mined in 1931, about 60 years
after the discovery of lode gold. Placer gold was
recovered from the Gold Basin district in 1909, but,
probably because of the isolation of the district,
apparently no further placer mining was done until
1931. Placer-mining activity since the early 1930's
has been almost continuous but on a small scale. A
few mining operation have used power shovels and small
dry-concentrating plants to mine the gravels, but
most activity was with the small portable drywasher
so prevalent in the Southwest.
Owing to the relatively late development of the placers,
early miners were able to sample virtually untouched
placer ground in this area.On the east flank of the
Lost Basin Range, the richer gold-bearing gravels
are generally less than 2 feet thick and rest on caliche-cemented
gravels.The gold contained in these surface gravels
ranges in size from fine dust to nuggets as much as
three-quarters of an ounce; in 1941, a nugget valued
at $140 (4 oz.) was recovered from a placer near the
King Tut.
Source:
Recent work by US Geological survey
indicated that there are many small gold-quartz-carbonate-sulfide
veins in the Precambrian rocks. Gold derived from
some of these veins is the probable source of the
placers.
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