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pXRF: Heavy and light mineral separates

Portable X-ray Fluorescence Analyses Results for Heavy and Light Separates from Field Samples near Hinkley, California


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Morrison, J.M., Benzel, W.M., Holm-Denoma, C.S., and Bala, S., 2018, Grain size, mineralogic, and trace-element data from field samples near Hinkley, California: U.S. Geological Survey data release,


Heavy and light mineral separates were extracted from the 36 collected field samples following a USGS procedure (Strong and Driscoll, 2016) and analyzed using the handheld portable X-ray fluorescence (pXRF) analyzer as part of a study examining the occurrence of chromium and natural and anthropogenic hexavalent Chromium, Cr(VI), in groundwater. Data will be used to estimate naturally-occurring background Cr(VI) concentrations upgradient, near the plume margins, and downgradient from a mapped Cr(VI) contamination plume near Hinkley, CA (Izbicki and Groover, 2016). These pXRF results are part of a data release including grain size distribution, photographic and associated chemical and mineral analysis data for 36 sediment core and alluvium [...]


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Hinkley_pXRF_Heavy_Light Separates.csv 17.92 KB
DataDictionary_pXRF_Heavy_Light Separates.csv 7.41 KB


Data were collected to determine the source of several elements of interest, particularly chromium and arsenic in alluvium and core material from wells collected from the Hinkley area.

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