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Found 35 dataset(s) matching "isotope ratio mass spectrometer".
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Aliquots of collected water samples were prepared for isotopic analysis at the USGS laboratories in Menlo Park, CA by precipitating dissolved sulfate as barium sulfate, using the methods of...
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Samples from outside the crater lake were analyzed for their sulfur isotopic composition. Samples of sulfate alteration and native sulfur from the Kīlauea summit, Halema’uma’u crater (HMM), and...
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Sulphur Banks, near the summit of Kīlauea Volcano on the Island of Hawai`i, is a thermal area where volcanic gases and steam are discharged. A research well drilled in the 1920s at Sulphur Banks...
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This data package reports presence/absence and density data, and environmental data (temperature, salinity, dissolved oxygen) collected in the northern Gulf of Mexico during R/V Blazing Seven...
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Radiocarbon dating of silicified wood was performed at the U.S. Geological Survey’s Radiocarbon Laboratory in Denver, Colorado. All samples were chemically treated using the standard...
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This dataset contains bulk sulfur stable isotope values (δ34S) derived from muscle tissue collected from fish species utilizing various marsh sub-habitats (edge, creek, ponds) along a salinity...
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Rock, sediment, and bottom water samples were collected via ROV Hercules from seamounts in the Papahānaumokuākea Marine National Monument during expeditions NA134 and NA138 of EV Nautilus, to...
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This dataset consists of stable isotope data from turtlegrass-dominated seagrass beds of the northern Gulf of America (formally the Gulf of Mexico), including Lower Laguna Madre, TX; Coastal Bend,...
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Ice core from Greenland was melted, filtered, and homogenized. Its stable hydrogen (δ2H) and oxygen (δ18O) isotopic compositions were adjusted to approximately match those of USGS46 ice core water...
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This data release contains 60 detrital zircon age spectra, based on U and Pb isotope ratio measurements for 9399 single grains. The samples are from Paleogene strata of the U.S. Gulf Coast. Of the...
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A series of Natural Resource Damage Assessment (NRDA) cruises were conducted in 2010 and 2011 to evaluate the distribution and densities of ichthyoplankton and other zooplankton in Gulf of Mexico...
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This dataset contains a compilation of seafloor surface benthic foraminifera assemblages, baseline stable carbon and oxygen isotope measurements from benthic foraminifera, and short-lived...
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<p>Phenotypic evaluation of 37 crimson clover (<em>Trifolium incarnatum</em> L.) accessions from the US National Plant Germplasm System. Focus of the trial was on traits important for cover crop...
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<p>Biochars are charcoals used as soil amendments, and they have many beneficial effects on soil health. However, one negative effect is biochars often reduce concentrations of soil nitrogen that...
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This dataset contains bulk tissue carbon (delta-13C), nitrogen (delta-15N), and sulfur (delta-34S) stable isotope values from sediment samples, marsh primary producers, marsh invertebrates, and...
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This dataset provides geochronologic, geochemical, and isotopic data for selected igneous rock samples collected in the Lane Mountain area about 20 kilometers northeast of Barstow, California,...
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This ACE SWICS/SWIMS Data Set contains the Alpha Particle Number Density, Fe/O Abundance Ratio, C, O, Mg, Si, Fe Average Charge States, C+6/C+4, C+6/C+5, O+7/O+6 Charge State Ratios, He+2, C+5,...
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This ACE SWICS/SWIMS Data Set contains the He/O, C/O, N/O, Ne/O, Mg/O, Si/O, S/O, Fe/O Abundance Ratios, C, O, Mg, Si, Fe Average Charge States, C+6/C+4, C+6/C+5, O+7/O+6 Charge State Ratios,...
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This ACE SWICS/SWIMS Data Set contains the Alpha Particle Number Density, He/O, C/O, Ne/O, Mg/O, Si/O, Fe/O Abundance Ratios, C, O, Mg, Si, Fe Average Charge States, C+6/C+4, C+6/C+5, O+7/O+6...
