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XRD: Qualitative mineralogy of Bulk (less than 2 mm) and heavy mineral separates

Qualitative Mineral Identification from X-ray Diffraction of Size Fractions and Heavy Mineral Separates from Field Samples near Hinkley, California

Dates

Publication Date
Start Date
2016-11-01
End Date
2018-08-01

Citation

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, https://doi.org/10.5066/P9HUPMG0.

Summary

Splits of samples were prepared of heavy mineral separates and bulk separates less than 2mm for analysis using X-ray diffraction (XRD) and results were interpreted to identify mineral components 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 XRD 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 samples as well [...]

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Attached Files

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X-ray_Diffraction_Scans_Bulk_LT2mm.csv 843.96 KB
X-ray_Diffraction_Scans_Heavy_Mineral_Separates.csv 995.24 KB
DataDictionary_XRD_Scans.csv 1.02 MB
Hinkley_XRD_Mineral_ID.csv 6.57 KB

Purpose

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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