KeywordsArizona Geological Survey Bulletins
Peacock Mining District
Big Sandy River
Kingman Feldspar Mine
rare earth mineral deposits
rare earth mineral
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DescriptionDURING LATE SUMMER, 1955, the writer spent a week in the western part of Arizona examining rare-earth mineral deposits in Mohave County. Occurrences of rare-earth minerals long have been reported from several pegmatite deposits in the Cerbat and Aquarius Ranges, north and southeast of Kingman, respectively. Galbraith (1947) reports chevkinite from the Aquarius Range (p. 90); gadolinite from near Kingman, " ... and in the northern part of the county, in sand dunes" (p. 87); euxenite in the Cerbat Range ". . . as scattered masses up to 50 pounds weight in pegmatite, Kingman Feldspar mine," and east of Big Sandy River, south of Burro Creek (p. 90); samarskite in the Aquarius Range with allanite (p. 40); and allanite in the Aquarius Range with gadolinite and at the Kingman Feldspar Mine (p. 89). Moore (1953) reports that gadolinite has been mined from pegmatites in the Aquarius Range, 30 miles south of Hackberry (p. 8); samarskite has been found in pegmatites in the Aquarius Range associated with allanite (p. 23); euxenite in masses up to 50 pounds has been found in the Kingman Feldspar Mine, Cerbat Range (p. 23); fergusonite has been produced by L. L. Edgerton from the Aquarius Range (p. 23), and allanite occurs at the Kingman Feldspar Mine (p. 26). Collections of the Smithsonian Institution in Washington, D. C., contain gadolinite from the Black Beauty Claim, 20 miles south of Hackberry, Arizona, and fergusonite from the Peacock Mining District near Kingman. 22 p.
Series/Report no.Bulletin No. 167
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North Bounding Coordinate37.0665
South Bounding Coordinate34.7713
West Bounding Coordinate-114.774
East Bounding Coordinate-113.06
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Animal health problems caused by silicon and other mineral imbalancesMayland, H. F.; Shewmaker, G. E. (Society for Range Management, 2001-07-01)Plant growth depends upon C, H, O, and at least 13 mineral elements. Six of these (N, K, Ca, Mg, P, and S) macro-elements normally occur in plants at concentrations greater than 1,000 mg kg(-1) level. The remaining micro-elements (B, Cl, Cu, Fe, Mn, Mo, and Zn) normally occur in plants at concentrations less than 50 mg kg(-1). Trace amounts of other elements (e.g., Co, Na, Ni, and Si) may be beneficial for plants. Silicon concentrations may range upwards to 50,000 mg kg(-1) in some forage grasses. Mineral elements required by animals include the macro-elements Ca, Cl, K, Mg, N, Na, P, and S; the trace or micro-elements Co, Cu, Fe, I, Mn, Mo, Se, and Zn; and the ultra-trace elements Cr, Li, and Ni. When concentrations of these elements in forages get 'out of whack' their bioavailability to animals may be jeopardized. Interactions of K x Mg x Ca, Ca x P, Se x S, and Cu x Mo x S are briefly mentioned here because more detail will be found in the literature. Limited published information is available on Si, so we have provided more detail. Silicon provides physical support to plants and may reduce susceptibility to pests. However, Si may have negative effects on digestibility and contribute to urinary calculi in animals.