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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts U.S. Geological Survey, SOUTHWEST REGION U.S. Geological Survey - ScienceBase Andrea L. Foster Callum Bobb Emily G. Wright More... Categories Data (2) Tag Types Theme (2) Place (2) Tag Schemes USGS Thesaurus (2) Common geographic areas (1) ISO 19115 Topic Category (2) Marine Realms Information Bank (MRIB) keywords (1) None (1) View Results as: JSON ATOM CSV

Raman and Synchrotron X-ray Data of Sold Phases Used in Chromium Sequestration and Re-oxidation Experiments with Sand and Sediment from Hinkley, CA This page contains (a) bulk synchrotron-based X-ray absorption spectra; (b) microbeam synchrotron-based X-ray fluorescence maps and spectra; and (c) microbeam Raman spectra (and corresponding optical images). These data were used to understand chromium, iron, and manganese valence and mineral residence in natural and synthetic mineral mixtures used in laboratory experiments designed to simulate dynamic conditions in an engineered aquifer system [see Izbicki and Groover (2018) and Miller and others (2020)]. Categories: Data; Tags: Hinkley, CA, aquifer, atomic emission spectroscopy, carbon, chromium, All tags... environment, geochemistry, iron, manganese, mass spectroscopy, toxic trace element contamination, x-ray fluorescence, Fewer tags Imagery (Optical and SEM), Element Maps (SEM), and Energy Dispersive Spectra (SEM-EDS) of Solids Used in USGS' Study of Hexavalent Chromium Contamination of Ground Water Near Hinkley, CA This child page contains qualitative multi-element compositional data from scanning electron microscopy-energy dispersive spectrometry. The data are in the form of element maps and normalized compositional data from spots or areas. These qualitative data are accompanied by backscattered electron images and, in some cases, corresponding optical images. Quantitative measurement of features in a subset of the optical images is also presented. Data collected after July 22, 2019 are subject to secondary data review as required by the Energy and Minerals Mission Area Quality Management System (EMMA QMS). As this process is not yet complete, data collected after July 22, 2019 must be considered preliminary or provisional... Categories: Data; Tags: California, Hinkley, San Bernardino, biological and physical processes, biota, All tags... chemical analysis, chromium, contaminant transport, geochemistry, iron, manganese, optical microscopy, oxidation and reduction, scanning electron microscopy, time series datasets, Fewer tags