Comparator neutron activation analysis of the solid volumetric rock samples for gold content

The application of comparator instrumental neutron activation analysis (INAA) combined with the internal standard method was considered to analyze solid volumetric samples different rocks, 15–20 g mass, for Au content. Fe used as its mass fraction determined by X-ray fluorescence (XRF) help a laboratory energy dispersive XRF spectrometer RLP-21T, Kazakhstan. puck-like about 29 mm across diameter and 10 thickness were sliced up from rock drill-cores diamond saw. No other pretreatment applied. Sample dimensions fitted in compliance that dishes substitute them during analysis, i.e. they highest possible allowed spectrometer. Relative corrections self-shielding gamma-ray self-absorption same corresponding their macrocomponent composition types common rocks turned out rather small, simply accounted using standard, almost irrespective types. By example serpentinite, picrite diabase-picrite (Western Ulytau Belt, Central Kazakhstan) whole approach found expedite reliable being applied determine content sufficiently homogeneous magmatic metamorphic rocks. More efforts resulting multiple measurements due heterogeneous distribution are necessary industrially significant contents sedimentary like black shales (Bakyrchik, Eastern Kazakhstan).