Geology and tungsten mineralization of the Bishop district, California, with a section on gravity study of Owens Valley and a section on seismic profile

10.3133/pp470 ◽  
1965 ◽  
Author(s):  
Paul Charles Bateman ◽  
L.C. Pakiser ◽  
Martin Francis Kane
Keyword(s):  
Seismic Profile ◽  
Owens Valley ◽  
Tungsten Mineralization ◽  
And Tungsten

Trans-California seismic profile, death Valley to Monterey Bay

1973 ◽  
Vol 63 (2) ◽  
pp. 571-586
Author(s):  
Dean S. Carder
Keyword(s):  
Sierra Nevada ◽  
Upper Mantle ◽  
Central Valley ◽  
Test Site ◽  
Seismic Profile ◽  
High Energy ◽  
High Yield ◽  
Western Coast ◽  
Monterey Bay ◽  
Owens Valley

abstract An experiment to investigate the major earth structure along a profile from the Nevada Test Site (NTS) to the Pacific Ocean across two sections of the Sierra Nevada, one in the Kings Canyon area and the other which includes Huntington Lake, was undertaken by the Earthquake Mechanism Laboratory of the National Oceanic and Atmospheric Administration (NOAA). Instrumental coverage included 35 temporary and seven permanent seismographs. Energy sources included four high-yield and 20 intermediate- to low-yield nuclear explosions under the NTS, one high-yield explosion under Amchitka Island of Alaska, two earthquakes near Santa Rosa, and one earthquake in Monterey Bay. An upper-mantle speed of 7.9 km/sec satisfied most of the observed data except under the Sierra where the velocity was somewhat lower than this. An earthquake in Monterey Bay helped to close the west end of the profile. The Sierra Nevada “root” in large part can be attributed to relatively low upper-mantle speed under the Sierras (estimated at 7.64 km/sec) which extends to an indefinite depth and which possibly may serve as lens to refract late arriving high-energy waves to coastal areas. Crustal thickness from the Sierra foothills eastward varies from 25 to 35 km, the thinner portion under the Sierra crest and Owens Valley, near Independence, and the thicker sections under the western Sierra and the basin ranges east of Owens Valley. West of Fresno, the crust thins more or less gradually to about 20 km in thickness under the western coast ranges. This profile contrasts with that from an earlier study, across the Central Valley south of Stockton, where no such thinning under the Central Valley was observed. The sub-Sierra crust east of Fresno is somewhat complicated. Low-angle thrusting toward the east is indicated.

Discovery of a Tin-tungsten Mineralization in Northern Khartoum Province, Sudan

1967 ◽  
Vol 104 (1) ◽  
pp. 1-12 ◽  
Author(s):  
D. C. Almond
Keyword(s):  
Northern Africa ◽  
Northern Nigeria ◽  
Igneous Complex ◽  
Sulphide Minerals ◽  
Quartz Veins ◽  
Primary Deposit ◽  
Tungsten Mineralization ◽  
Ring Dyke ◽  
And Tungsten

AbstractA primary deposit of tin and tungsten has been discovered in association with granites of the Cambrian (?) sub-volcanic igneous complex at Sabaloka, on the Nile north of Khartoum. Wolfram and cassiterite occur in a stockwork of quartz veins which also contain minor amounts of sulphide minerals. The stockwork centres around a small intrusion of primary greisen lying on the contact of a porphyritic microgranite ring-dyke but the greisen and mineralizing solutions are believed to have originated from a nearby mass of biotite-muscovite granite. The deposit has many features in common with the primary tin veins associated with the Younger Granites of northern Nigeria and other parts of northern Africa.

Age of Molybdenum and Tungsten Mineralization in Northern British Columbia

1972 ◽  
Vol 9 (12) ◽  
pp. 1727-1734 ◽  
Author(s):  
P. A. Christopher ◽  
W. H. White ◽  
J. E. Harakal
Keyword(s):  
British Columbia ◽  
Granite Porphyry ◽  
Property A ◽  
Eastern Margin ◽  
Upper Limit ◽  
Early Tertiary ◽  
Metallogenic Epoch ◽  
Tungsten Mineralization ◽  
And Tungsten

A K–Ar mean age of 49.8 ± 0.7 m.y. was determined for four biotite concentrates from granite porphyry on the Mt. Haskin Mo and Mt. Reed Mo–W properties east of Cassiar, British Columbia.Biotite K–Ar ages of 71.7 ± 2.6 m.y. and 68.3 ± 2.7 m.y. obtained from a young phase of the Cassiar intrusions, occurring along the eastern margin of the Cassiar Batholith, place an upper limit on the age of the molybdenum mineralization on the Cassiar Molybdenum property. A 62.0 ± 2.2 m.y. age, determined for a biotite concentrate from the coarse alaskite phase of the Mt. Leonard Boss, dates the molybdenum mineralization on the Adanac property.These ages suggest that the early Tertiary metallogenic epoch, documented in central British Columbia and southeastern Alaska, can be extended through northern British Columbia.

The Relationship between Radioactive Mineralization and Tungsten Mineralization in Shirenzhang Tungsten Deposit, North Guangdong

2014 ◽  
Vol 88 (s2) ◽  
pp. 67-68
Author(s):  
Minyue ZHOU ◽  
Fanqian KONG ◽  
Longming WEI ◽  
Mengjie CHEN ◽  
Li WANG ◽  
...  
Keyword(s):  
Tungsten Deposit ◽  
The Relationship ◽  
Tungsten Mineralization ◽  
And Tungsten

Geochronology of the Xihuashan composite granitic body and tungsten mineralization, Jiangxi Province, South China

1987 ◽  
Vol 82 (1) ◽  
pp. 218-223 ◽  
Author(s):  
Edwin H. McKee ◽  
James J. Rytuba ◽  
Xu Keqin
Keyword(s):  
South China ◽  
Jiangxi Province ◽  
Tungsten Mineralization ◽  
And Tungsten
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