新疆东准噶尔拉伊克勒克斑岩型铜矿床岩石地球化学勘查及成矿预测
The Rock Geochemical Exploration and Metallogenic Prediction in the Layikeleke Porphyry Copper Deposit，Eastern Junggar，Xinjiang

摘要： 拉伊克勒克铜矿床位于新疆东准噶尔琼河坝矿集区中南部，具有良好的找矿前景，因此对拉伊克勒克试验区进行深入的研究很有意义。通过对拉伊克勒克斑岩型铜矿床中15种微量元素和9种常量元素含量的系统研究，总结出元素富集贫化特征，并对这些元素含量随着主成矿元素Cu含量变化的规律性进行了探讨，筛选出勘查指标。以试验区K0、K1勘探线剖面为例，对英云闪长岩、凝灰岩中元素质量迁移特征与规律进行了初步讨论。结果表明：富集元素Cu、Ag、Mo、S、Se等带入形成的正异常与铜矿体吻合度很高，凝灰岩中Ba、Cs、Rb、K2O等与英云闪长岩中Ba、MgO、Na2O、CaO等带出形成的负异常涵盖了整个剖面。重点讨论了英云闪长岩中MgO、Na2O、CaO负异常的形成机制。以多维异常体系理论为指导，对元素空间分布特征和成矿与未成矿地段地球化学特征的差异进行探讨，综合运用不同属性的异常，确定找矿方向。
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