Folders: ROOT > ScienceBase Catalog > ReSciColl Archive > Alaska Division of Geological & Geophysical Surveys > Collection of geochemical data from Alaska (DGGS) ( Show direct descendants )
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ROOT _ScienceBase Catalog __ReSciColl Archive ___Alaska Division of Geological & Geophysical Surveys ____Collection of geochemical data from Alaska (DGGS) Filters
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Most of the samples were analyzed for gold, platinum, and palladium by atomic absorption with a fire assay preconcentration at Bondar Clegg. A few samples were analyzed by inductively coupled argon plasma spectroscopy or fire assay at the BOM Reno Research Center. Silver concentrations were determined by either atomic absorption or fire assay. Atomic absorption was used to determine the amounts of copper, nickel, and cobalt.
Categories: Physical Item;
Tags: Geochemical Sample
Pan concentrates were analyzed by atomic fluorescence for gold, platinum, and palladium, and inductively coupled plasma for all other elements analyzed.
Categories: Physical Item;
Tags: Geochemical Sample
Pan concentrates were analyzed by atomic fluorescence for gold, platinum, and palladium, and inductively coupled plasma for all other elements analyzed.
Categories: Physical Item;
Tags: Geochemical Sample
Three to 10 grams of each concentrate were used for analysis. The results of the four fractions were combined to give the total sample assay. Petrographic analysis of the concentrates was performed to determine the mineral content of each concentrate. The results of the four fractions were combined to give the total sample mineral percents.
Categories: Physical Item;
Tags: Geochemical Sample
The magnetic separated product was also weighed. Acid soluble iron, equivalent TiO2, and radiometric uranium equivalent analyses were completed. The samples that contained insufficient heavy mineral to table were only screened to minus ten mesh before the Acid soluble iron, equivalent TiO2, and radiometric uranium equivalent analyses were completed. Gold and platinum analyses were made on samples in which more than trace amounts were observed in the field.
Categories: Physical Item;
Tags: Geochemical Sample
Whole-rock major oxide analyses were performed by using atomic absorption by Bondar-Clegg. An unknown laboratory performed trace element analysis for cobalt, copper, nickel, and lead by atomic absorption. Gold, silver, cobalt, chromium, copper, and nickel content was determined by atomic absorption with results reported in ppm. The samples were preconcentrated by fire assay before being analyzed for gold, platinum, palladium, iridium, osmium, rhodium, ruthenium by inductively coupled plasma.
Categories: Physical Item;
Tags: Geochemical Sample
Rock samples were analyzed by inductively coupled plasma (ICP) spectroscopy. Samples with visible quantities of either gold, silver, platnium group elements, copper, lead, zinc, tin, molybdemum, chromium, nickel, or antimony had fire assay or atomic absorption analyses performed for those elements.
Categories: Physical Item;
Tags: Geochemical Sample
Slab XRF analysis - The XRF analyses were run on a PANalytical Axios spectrometer using SuperQ software. Nb, Rb, Sr, Y, and Zr were measured using Super's 37mmRbSrYZr routine software program; other elements were measured with the IQ+37mmVac software program. The 37mmRbSrYZr routine uses specific pre-determined peak and background positions for which x-ray intensities are measured for 2-800 seconds (depending on the element). The intensity of the Rh Compton peak is used to estimate mass-absorption coefficients (MACs) for both unknowns and well-characterized natural standards. Peak intensities are computed and converted to concentrations using calibration curves employing at least 10 natural rock standards.
Categories: Physical Item;
Tags: Geochemical Sample
827 samples were analyzed for major and minor oxides using X-ray Fluorescence after lithium metaborate fusion; for gold on a 30-gram split using Atomic Absorption Spectroscopy after Fire Assay; for trace elements using Inductively Coupled Plasma - Atomic Emission Spectroscopy following HCl:HNO3 (3:1) acid digestion. XRF analysis was performed on raw (non-fused) rock samples by Inco Limited's laboratory in Copper Cliff, Ontario for barium, niobium, strontium, yttrium and zirconium.
Categories: Physical Item;
Tags: Geochemical Sample
90 samples were analyzed by the following methods and digestions: INAA, ICP after HF-HNO3-HClO4 acid digestion with HCl leach, AA after HNO3-HCl hot extraction. 1 sample was analyzed for DC Plasma Emission after fire assay. 52 samples were analyzed for Specific Ion after Na2CO3-KNO3-fusion. Elevated detection limits are due to high levels of Th and U.
Categories: Physical Item;
Tags: Geochemical Sample
142 samples were analyzed by the following methods and digestions: INAA, AA after HNO3-HCl hot extraction. 109 samples were analyzed by CVAA after HNO3-HCl-SnSO4 acid digestion, AA with Muliti-Acid MIBK and XRF. 90 samples were analyzed by DC Plasma Emission after NaOH fusion. 89 samples were analyzed by ICP after HF-HNO3-HClO4 acid digestion with HCl leach. Assay of High Zn to follow on V91-20128.6
Categories: Physical Item;
Tags: Geochemical Sample
All 335 core samples obtained from the 11 holes were analyzed for total iron content. Representative head samples, carefully prepared from the general composite, were analyzed both chemically and spectrographically. Semiquantitative spectrographic analysis revealed the presence and approximate quantities of the metal listed in table 4. Any other elements, if present, are in amounts lower than the minimum detectable by the routine technique employed.
Categories: Physical Item;
Tags: Geochemical Sample
Samples were analyzed for trace elements and rare earth elements using: Inductively Coupled Plasma - Atomic Emission Spectroscopy (HF-HNO3-HClO4-HCl digestion), Inductively Coupled Plasma - Mass Spectroscopy (Lithium metaborate fusion - HNO3-HCl dissolution), and/or Inductively Coupled Plasma - Atomic Emission Spectroscopy (Fire assay - aqua regia digestion). The method used to analyze each element is listed in the detection limits table. For high-grade and mineralized rare earth samples, high sample to volume ratios are utilized in the Inductively Coupled Plasma - Atomic Emission Spectroscopy analysis to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol....
Categories: Physical Item;
Tags: Geochemical Sample
Samples were analyzed for trace elements and rare earth elements using: Inductively Coupled Plasma - Mass Spectroscopy (Lithium metaborate fusion - HNO3-HCl dissolution), Inductively Coupled Plasma - Atomic Emission Spectroscopy (Fire assay - aqua regia digestion), and/or Inductively Coupled Plasma - Atomic Emission Spectroscopy (HF-HNO3-HClO4-HCl digestion). See ALS documentation for a more detailed discussion of the methodology.
Categories: Physical Item;
Tags: Geochemical Sample
Analysis for Au, Pt, and Pd was by fire assay preconcentration with an inductively coupled plasma finish by USBM Reno. Analysis for suite of elements was by aqua regia digestion with an atomic absorption spectrophotomerty finish or an inductively coupled plasma finish by DGGS. Chrome was analyzed on lithium metaborate digests.
Categories: Physical Item;
Tags: Geochemical Sample
Analysis for Au, Pt, and Pd was by fire assay preconcentration with an inductively coupled plasma finish by USBM Reno. Analysis for suite of elements was by aqua regia digestion with an atomic absorption spectrophotomerty finish or an inductively coupled plasma finish by DGGS. Chrome was analyzed on lithium metaborate digests.
Categories: Physical Item;
Tags: Geochemical Sample
Analysis for Au, Pt, and Pd was by fire assay preconcentration with an inductively coupled plasma finish by USBM Reno. Analysis for suite of elements was by aqua regia digestion with an atomic absorption spectrophotomerty finish or an inductively coupled plasma finish by DGGS. Chrome was analyzed on lithium metaborate digests.
Categories: Physical Item;
Tags: Geochemical Sample
Analysis for Au, Pt, and Pd was by fire assay preconcentration with an inductively coupled plasma finish by USBM Reno. Analysis for suite of elements was by aqua regia digestion with an atomic absorption spectrophotomerty finish or an inductively coupled plasma finish by DGGS. Chrome was analyzed on lithium metaborate digests.
Categories: Physical Item;
Tags: Geochemical Sample
Analysis for Au, Pt, and Pd was by fire assay preconcentration with an inductively coupled plasma finish by USBM Reno. Analysis for suite of elements was by aqua regia digestion with an atomic absorption spectrophotomerty finish or an inductively coupled plasma finish by DGGS. Chrome was analyzed on lithium metaborate digests.
Categories: Physical Item;
Tags: Geochemical Sample
The sample was analized for Cr using semi-quantutative X-Ray Flourescence.
Categories: Physical Item;
Tags: Geochemical Sample
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