Abstract
During the period 1985 to 1991, a systematic study was done on the geochemical characteristics of the Karatüngk nickelcopper deposit in the Xinjiang-Uygur Autonomous Region in northwestern China. Surface rock and drill core sampling and CHIM surveying were carried out. Geochemically anomalous distribution patterns of Cu, Ni, Co, Cr, Ag, Mo, Ba, B, and As were outlined. A preliminary study showed that Cu, Ni and Co are diagnostic indicators for outcropping Ni-Cu-bearing intrusives, but are much less useful for concealed Ni-Cu-bearing bodies. Distinct anomalous associations of Ba, As, Mo, B, Ag, and Cr have been found over concealed intrusive bodies containing Cu-Ni deposits. Geochemical criteria for evaluating the nickel potential in basic-ultrabasic intrusive bodies in the Ertix ore belt were identified and a series of new anomalies discovered. Since completion of the study, two nickeliferous basic intrusives have been intersected by drilling.
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