Energy Dispersive Spectroscopy and Scanning Electron Microscopy Results from Field Samples near Hinkley, California

Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to analyze acid residues from heavy mineral separates, polished grain mounts, and clays from sampled sediments 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). Results from EDS and SEM are presented as PDF reports and TIFF images. These data 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 as select grains from magnetic and heavy mineral separates collected near Hinkley, CA. The cooperator for this study is the Lahontan Regional Water Quality Control Board. Results are provided in this data release organized by analysis type.

Data and Resources

Field Value
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identifier USGS:5b759164e4b0f5d5787fe4f7
metadata_type geospatial
modified 20200929
old-spatial -117.6202, 34.3425, -117.1071, 34.9972
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
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theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • atomic-emission-spectroscopy
  • background-level
  • california
  • chemical-analysis
  • chromium
  • ckan
  • contamination-and-pollution
  • geo
  • geochemistry
  • geoscientificinformation
  • geoss
  • groundwater
  • health
  • hinkley
  • mass-spectroscopy
  • national
  • north-america
  • rocks-and-deposits
  • scanning-electron-microscopy
  • soil-chemistry
  • unconsolidated-deposits
  • united-states
  • usgs-5b759164e4b0f5d5787fe4f7
  • x-ray-fluorescence
isopen False
license_id notspecified
license_title License not specified
maintainer Jean M. Morrison
maintainer_email jmorrison@usgs.gov
metadata_created 2025-11-21T03:37:42.113598
metadata_modified 2025-11-21T03:37:42.113602
notes Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to analyze acid residues from heavy mineral separates, polished grain mounts, and clays from sampled sediments 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). Results from EDS and SEM are presented as PDF reports and TIFF images. These data 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 as select grains from magnetic and heavy mineral separates collected near Hinkley, CA. The cooperator for this study is the Lahontan Regional Water Quality Control Board. Results are provided in this data release organized by analysis type.
num_resources 2
num_tags 26
title Energy Dispersive Spectroscopy and Scanning Electron Microscopy Results from Field Samples near Hinkley, California