This map is part of a folio of maps of the Ajo and Lukeville 1 ° x 2° quadrangles, Arizona, prepared under the Conterminous United States Mineral Assessment Program. Other publications in this folio include U.S. Geological Survey Miscellaneous Field Studies Maps MF-1831-A and MF-1831-B and Open-File Reports 82-119, 82–599, and 83–734. Open-File Reports 82-119 and 83–731 constitute the basic data and initial interpretation on which this discussion is predicated.

Arizona↗

USGS1987

Analytical results and sample locality map of heavy-mineral-concentrate samples from the Turtle Canyon Wilderness Study Area (UT-060-067), Emery County, Utah

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Open-File Report↗

USGS1987

Sample locality map and results of carrier distillation emission spectrographic analysis of stream-sediment samples from the Chandler Lake Quadrangle, Alaska

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Open-File Report↗

USGS1987

Analytical results and sample locality map for heavy-mineral-concentrate samples from the Lower Gila Box Wilderness Study Area (NM-030-023), Grant and Hildago counties, New Mexico

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Open-File Report↗

USGS1987

Analytical results and sample locality map for heavy-mineral-concentrate and stream-sediment samples from the Desatoya Mountains Wilderness Study Area, Churchill and Lander counties, Nevada

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Open-File Report↗

USGS1987

Analytical results and sample locality map of heavy-mineral concentrates of ridge-top soil samples from the Morgan Pass region of the Goshute Peak and Blue Bell Wilderness Study Areas, Elko County, Nevada

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Open-File Report↗

USGS1986

Emission spectrographic determination of volatile trace elements in geologic materials by a carrier distillation technique

Trace levels of chalcophile elements that form volatile sulfide minerals are determined in stream sediments and in the nonmagnetic fraction of a heavy-mineral concentrate of stream sediments by a carrier distillation emission spectrographic method. Photographically recorded spectra of samples are visually compared with those of synthetic standards for the two sample types. Rock and soil samples may also be analyzed by comparison with the stream-sediment standards. A gallium oxide spectrochemical carrier/buffer enhances the early emission of the volatile elements. Detection limits in parts per million attained are: Sb 5, As 20, Bi 0.1, Cd 1, Cu 1, Pb 2, Ag 0.1, Zn 2, and Sn 0.1. A comparison with other methods of analysis, total-burn emission and atomic absorption spectroscopy, shows good correlation for standard reference for materials and samples from a variety of geologic terranes.

Journal of Geochemical Exploration↗

USGS1986