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The Denver Microbeam Laboratory (DML) provides infrastructure and expertise for basic and advanced microanalytical research carried out by scientists from most Mission Areas of the USGS as well as outside collaborators. The laboratory houses optical microscopes, digital microscopes, scanninging electron microscopes, energy dispersive spectrometers, electron backscattered diffraction, cathodoluminescence, and electron microprobes. The data collected in the Denver Microbeam Lab is used by researchers in the fields of mineralogy, petrology, geologic mapping, hydrology, biology, and environmental science.
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The Geology, Energy & Minerals Science Center (GEMSC) is a research center within the U.S. Geological Survey (USGS) that conducts comprehensive, interdisciplinary research, assessments, and surveys of the origin, occurrence, distribution, quantity, composition, and environmental effects of geologic energy materials, minerals, associated deposits, and waste materials. Additionally, GEMSC scientists are working on a broad range of current and emerging geology, energy, and minerals issues including evaluating waters produced during oil and gas extraction; identifying wastes that can be recovered or repurposed and used in new processes; conducting studies and assessments of critical minerals and rare earth elements;...
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This dataset contains major and trace element compositions for a sample of basalt recovered from Rangitoto Island, New Zealand. Both bulk rock and microanalytical observations are made and presented. Electron probe microanalysis (EPMA) results detail the compositions of individual phases within the basalt including olivine, clinopyroxene, plagioclase feldspar, glass, and polyphase microcrystalline groundmass. Laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) results detail trace element compositions for the glass as well as on select olivine grains. X-Ray fluorescence (XRF) data detailing major and minor element oxide concentrations were gathered using bulk rock powders. Additional tables detail...
    map background search result map search result map Data Support for a Statistical Perspective on the Petrologic Utility of Polyphase Groundmass Compositions Inferred Via Defocused Beam Electron Probe Microanalysis Data Support for a Statistical Perspective on the Petrologic Utility of Polyphase Groundmass Compositions Inferred Via Defocused Beam Electron Probe Microanalysis