Prototype borehole miner selectively extracts gold from permafrost.

Alluvial mining : the geology, technology, and economics of placers /
by: Macdonald, Eoin H.
Published: (1983)

Mineral resource potential map of the Granite Chief Wilderness Study Area, Placer County, California /
Published: (1982)

Mineral resource potential map of the North Fork of the American River Wilderness Study Area (RARE II no. 5-262), Placer County, California /
Published: (1982)

Investigation of the Tozimoran Creek tin placer deposits, Fort Gibbon District, Alaska /
by: Thomas, Bruce I.
Published: (1948)

Distribution of placer gold in the Sixes River, southwestern Oregon : a preliminary report /
by: Boggs, Sam, et al.
Published: (1970)

Reconnaissance investigation of the alluvial gold deposits in the North Takhar Area of Interest, Takhar Province, Afghanistan /
by: Chirico, Pete, et al.
Published: (2013)

Hydraulic equivalence of grains of quartz and heavier minerals : and implications for the study of placers /
by: Tourtelot, Harry Allison, 1918-
Published: (1968)

Gold panning : a guide to recreational gold panning on the Kenai Peninsula, Chugach National Forest, Alaska /
by: Huber, Carol
Published: (2001)

Official map of Placer County, California : compiled from the latest authentic sources ; showing U.S. land surveys, mining claims, altitudes, roads ditches, towns and villages, school districts, etc., etc. /
by: Uren, Charles E. (Charles Edwin)
Published: (1887)

Placer County investigation.
Published: (1954)

Gold panning : guide to recreational gold panning on the Kenai Peninsula, Chugach National Forest, Alaska.
by: Huber, Carol, et al.
Published: (2018)

Tin-bearing placer deposits near Tofty, Hot Springs District, central Alaska /
by: Thomas, Bruce I.
Published: (1957)

Heavy-mineral placer potential map of the U.S. continental shelf, western and northern Gulf of Mexico /
Published: (1988)

Gold placer deposits of the Pioneer district, Montana : a geologic study of the historic diggings along Gold Creek /
by: Pardee, J. T. (Joseph Thomas), 1871-1960
Published: (1951)

Mineral resource potential map of the Rubicon roadless area, Placer and El Dorado Counties, California /
by: Harwood, David S.
Published: (1983)

Quarrying, opencast and alluvial mining /
by: Sinclair, John, 1900-
Published: (1969)

Gold placers of the Circle district, Alaska : past, present, and future /
by: Yeend, Warren E., 1936-
Published: (1991)

Employment and income from gold placering by hand methods, 1935-37 /
by: Newcomb, Robinson, 1901-, et al.
Published: (1940)

Investigation of the Morelock Creek tin placer deposits, Fort Gibbon District, Alaska /
by: Thomas, Bruce I.
Published: (1948)

Gold placers of the historical Fortymile River Region, Alaska.
by: Yeend, Warren E., 1936-
Published: (1996)

Marine gold placers along the Gulf of Alaska margin /
by: Reimnitz, Erk

Placer gold of the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska /
Published: (1988)

Placer deposits of Alaska /
by: Cobb, Edward H. (Edward Huntington), 1916-1983
Published: (1973)

Map showing placer deposits of the Seward and Blying Sound quadrangles, Alaska /
Published: (1978)

Beach placers of the Oregon coast /
by: Pardee, J. T. (Joseph Thomas), 1871-1960
Published: (1934)

Marine gold placers along the Gulf of Alaska margin /
by: Reimnitz, Erk, et al.
Published: (1976)

Mercury geochemistry of gold placer tailings, sediments, bedrock, and waters in the lower Clear Creek Area, Shasta County, California : report of investigations, 2001-2003 /
by: Ashley, Roger P. (Roger Parkmand), 1940-
Published: (2008)

Geochemical maps of the Granite Chief Wilderness Study Area, California /
by: Harwood, David S.
Published: (1982)

Geologic map of the Granite Chief Wilderness Study Area and adjacent parts of the Sierra Nevada, California /
by: Harwood, David S.
Published: (1981)

Alluvial ilmenite placer deposits, central Virginia /
by: Minard, James P., et al.

Placer gold deposits of Nevada /
by: Johnson, Maureen G.
Published: (1973)

Placer gold deposits of Utah /
by: Johnson, Maureen G.
Published: (1973)

Placer gold deposits of Arizona /
by: Johnson, Maureen G.
Published: (1972)

Resource appraisal map for placer gold in the Wallace 1⁰ x 2⁰ quadrangle, Montana and Idaho /
Published: (1986)

The Conrey Placer Mining Company : a pioneer gold-dredging enterprise in Montana, 1897-1922 /
by: Spence, Clark C.
Published: (1989)

The Innoko gold-placer district, Alaska, with accounts of the central Kuskokwim Valley and the Ruby Creek and Gold Hill placers /
by: Maddren, A. G. (Alfred Geddes), 1875-
Published: (1910)