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现代地质 ›› 2016, Vol. 30 ›› Issue (3): 503-513.

• 地球化学 • 上一篇    下一篇

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

陈宏强1,2,马生明1,岑况2,李景运1   

  1. (1. 中国地质科学院 地球物理地球化学勘查研究所,河北 廊坊 065000;2. 中国地质大学(北京)地球科学与资源学院,北京 100083)
  • 出版日期:2016-06-14 发布日期:2016-06-15
  • 作者简介:陈宏强,男,硕士研究生,1991年出生,地质工程专业,主要从事矿产资源勘查与评价的研究工作。 Email:1207815740@qq.com。
  • 基金资助:

    国家科技支撑计划项目(2014BAB05B00);中国地质调查局地质矿产调查评价项目(1212011120525)。

The Rock Geochemical Exploration and Metallogenic Prediction in the Layikeleke Porphyry Copper Deposit,Eastern Junggar,Xinjiang

CHEN Hongqiang1,2, MA Shengming1, CEN Kuang2, LI Jingyun1   

  1. (1. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang, Hebei 065000,China;
    2. School of Earth Sciences and Resources,China University of Geosciences, Beijing 100083,China)
  • Online:2016-06-14 Published:2016-06-15

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。

关键词: 负异常, 成矿指示元素, 质量迁移, 多维异常体系, 成矿预测, 斑岩型铜矿, 新疆东准噶尔

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

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