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Comparison of Field and Laboratory Analyses
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30 counts/sec abundance aggregate material analysis antigorite Asbestos assay background level barite Battle Mountain boron Calaveras Calera limestone calibration California Cedar Mountain cement channel chert chromite chrysotile clay Company concentration Contaminants h Contributions to total Counting rate count counts/sec crushed crystal deposits Description Counting rate detector diatomite dike dike material dirt road dolomite dump dunite energy fallout gamma Gamma-ray spectrographic evaluation gamma-ray spectrum counts/min granitic h Contributions hable Idria igneous rocks interbedded Laboratory limestone located low-background material low-background shielding magnesite mined minerals Mount Diablo Base neutron Nevada obtained peak Permanente pile portable counter potassium present quarry quartz radiation radioactive background radioactive contamination radioactive content Red Mountain samples Run scintillation counter sediments serpentine serpentine body shale Sierra silica silica sand Sonora Sonora area sources of low-background spectra stockpile surface Table talc thorium total gamma-ray spectrum ultramafic rocks uranium uranium and thorium