Abstract:

The Layikeleke copper deposit located in the south central part of Qiongheba ore concentration area in eastern Junggar of Xinjiang has good prospecting potential. Therefore, the Layikeleke deposit is worthy to be further researched. Through systematic study of 15 kinds of trace elements and 9 major elements in the deposit, this study summed up the characteristics of element enrichment and depletion, and the regularity of the contents of these elements changing with main ore-forming elements of Cu to select index elements. Taking No.K0, K1 prospecting sections as examples, the characteristics and regularities of mass transfer in tonalite and tuff are discussed. The results show that the positive anomalies of enrichment elements including Cu, Ag, Mo, S, Se are well corresponded with the copper ore bodies, the negative anomalies of depleted elements including Ba, Sr, Rb, K₂O in tuff and Ba, MgO, Na₂O, CaO in tonalite cover the prospecting section. This article discusses emphatically the formation mechanism of negative anomalies of MgO, Na₂O, CaO in tonalite. Using the theory of multidimensional anomaly system as the guide, we analyzed the spatial distribution characteristics of metallogenic elements and geochemical characteristics and difference of the area without mineralization. Comprehensive utilization of different attributes of the anomalies can indicate the direction of ore-prospecting.

Key words: negative anomaly, indicator element;mass transfer, multidimensional anomaly system, metallogenic prediction, porphyry copper deposit, eastern Junggar of Xinjiang