Geology topics
D. F. Siems
Publications and source records attributed to D. F. Siems.
Analytical results and sample locality map for stream-sediment, nonmagnetic heavy-mineral concentrate, and rock samples from the Blue Eagle Wilderness Study Area (NV-060-158/199), Nye County, Nevada
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Analytical results and sample locality map of heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Analytical results and sample locality map for nonmagnetic heavy-mineral concentrates from stream sediments from the South Reveille Wilderness Study Area (NV-050-112), Nye County, Nevada
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Trace elements in disseminated sulfides, magnetite, and massive sulfides, West Shasta district, California.
Samples of massive sulfide layers show an enrichment in many minor and trace elements in the central part of layers. Comparison of trace element contents of massive sulfides, magnetite, and disseminated sulfides suggests differences in origin. Trace element contents of samples from various mines suggest regional variations.
Distribution of copper in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Distribution of zinc heavy-mineral-concentrate from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Distribution of gold in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Distribution of beryllium in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Distribution of niobium in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Distribution of barium in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Distribution of antimony, arsenic, bismuth, and cadmium in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Thorium, cerium, and monazite survey of the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina
No abstract available.
Geochemical signatures of ores and altered rocks in the Gilbert District, Esmeralda County, Nevada
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