Abstract
Traditionally, the logging of drill core and cuttings has been left largely to the visual acuity and interpretive acumen of the geologist. Supplementary X-ray diffraction-X-ray fluorescence (XRD-XRF) methods have been developed in recent years to provide rapid quantitative mineralogic and geochemical data on drill cuttings and core samples that can be plotted and contoured in vertical or plan sections. Such sections serve to outline alteration and geochemical zoning around various mineralized prospects and ore bodies, including porphyry deposits as well as disseminated gold deposits. Metallurgical ore types as well as lithologic rock types are classified routinely by computer processing of XRD-XRF data, which in turn are compiled into data base to facilitate metallurgical composting and rock type logging.
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