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Methods Total element abundances in the bulk tephra samples were determined by inductively coupled plasma mass spectrometry (ICP-MS) following a 4-acid digest at the USGS analytical laboratories in Denver, CO. Briefly, the tephra samples were digested using a mixture of hydrochloric, nitric, perchloric and hydrofluoric acids at low temperature following the methods of Crock and otheres (1983). The resultant fluid was aspirated into a 42-element ICP-MS for analysis following the analytical procedure of Briggs and Meier (2002). USGS geochemical reference materials BIR-1, BCR-1, and BHVO-1 were analyzed before and after Kilauea tephra samples for data quality control. Kīlauea sample A7-0641 was analyzed as an analytical...
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Airborne electromagnetic (AEM) and magnetic survey data were collected during November and December 2016 along 4,212 line-kilometers over Yellowstone National Park, Wyoming. The survey was conducted as part of a study of the subsurface geologic structure and geothermal and groundwater resources of Yellowstone National Park. The survey was designed to image the subsurface plumbing of Yellowstone's myriad thermal features by constraining the geometry of the major hydrostratigraphic contacts and mapping regional-scale geologic structures. Data were acquired by SkyTEM ApS with the SkyTEM 312M time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer. The survey was...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: GGGSC,
Geology, Geophysics, and Geochemistry Science Center,
Geophysics,
Grand Canyon of the Yellowstone River,
Hot Spring Basin Group, All tags...
Lower Falls of the Yellowstone River,
Lower Geyser Basin,
MRP,
Mammoth Hot Springs,
Midway Geyser Basin,
Mineral Resources,
Mineral Resources Program,
Mud Volcano,
Norris Geyser Basin,
Old Faithful,
Park County,
Pelican Valley,
State of Wyoming,
Teton County,
U.S. Geological Survey,
USGS,
USGS Science Data Catalog (SDC),
United States of America,
Upper Falls of the Yellowstone River,
Upper Geyser Basin,
Volcanology,
Wyoming,
Yellowstone Lake,
Yellowstone National Park,
Yellowstone National Park,
Yellowstone River,
aeromagnetic surveying,
electromagnetic surveying,
environment,
geologic structure,
geophysics,
geoscientificInformation,
geospatial datasets,
geothermic,
groundwater,
hydrogeology,
resistivity, Fewer tags
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On March 19, 2008, an explosive eruption occurred at the summit of Kīlauea Volcano for the first time since 1924. This event marked the beginning of a continuous summit eruption that lasted until the 2018 Kīlauea lower East Rift Zone eruption (Neal and others, 2019). The March 19 explosive eruption excavated a crater approximately 35 meters wide and scattered volcanic tephra over a 30-hectare area. Only non-juvenile tephra was erupted on March 19 (Houghton and others, 2011). Two subsequent, minor explosions occurred on April 9 and April 16, 2008. These two explosions were dominated by lithic material though did also include some juvenile tephra. Tephra was produced continuously after the initial March 19 eruption...
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Methods Particle size distributions were determined by laser diffraction analysis using a Malvern Mastersizer 2000 Laser Particle Size analyzer at the USGS analytical facilities in in Denver, CO. Ash samples were dried (105 °C), re-sieved at 2 mm (no samples contained material >2 mm), and split in half using a small volume chute splitter for duplicate analyses. Prior to analysis by laser diffraction, sodium-hexametaphosphate was added to each sample and the samples were placed on a shaker table for 4 hours to aid in particle de-flocculation. Each sample was introduced into an aqueous medium and pumped through the laser analyzer for grain size measurements. Data are reported as a volume percent.
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Methods Qualitative mineral determinations were made by X-ray diffraction (XRD) at the USGS analytical laboratories in Denver, CO. Bulk tephra samples were powdered and run on either a Scintag X-1 diffractometer with Bragg Brentano geometry, theta-theta motion with a Scintag Peltier cooled energy dispersive detector set to collect K alpha radiation or a Shimadzu XRD-6000 diffractometer using Cu radiation with Bragg Brentano geometry, theta-2-theta motion with a Scintillation detector. Samples were scanned from 4–65 °2θ (Shimadzu) or 5–90 °2θ (Scintag) with a step size of 0.02. Due to the high amorphous content in the ash samples, the scan parameters were adjusted to improve signal to noise ratio. Mineral Data Inc....
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