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现代地质 ›› 2012, Vol. 26 ›› Issue (5): 1095-1103.

• 地球化学 • 上一篇    下一篇

内蒙古哈达门沟金矿13号矿体地质地球化学特征

 李硕1, 冷昌恩2, 贺战朋3   

  1. 1 中国地质大学 地球科学与资源学院,北京100083;2 中国地质科学院 科技管理处, 北京100037;3 中国国土资源经济研究院, 河北 三河065201
  • 收稿日期:2012-06-26 修回日期:2012-08-29 出版日期:2012-10-19 发布日期:2012-10-23
  • 作者简介:李硕,男,硕士研究生,1988年出生,地质工程专业,主要从事地球化学方面的研究工作。Email:shuoli1988@126.com。
  • 基金资助:

    国土资源部公益性行业科研专项(201011055-3)。

Geological and Geochemical Characteristics of Orebody 13 of HadamengouGold Deposit, Inner Mongolia

 LI  Shuo-1, LENG  Chang-En-2, HE  Zhan-Peng-3   

  1. 1 School of Earth Sciences and Resources, China University of Geosciences, Beijing100083, China;2 Technology Management Department,Chinese Academy of Geological Sciences, Beijing100037, China;3 Chinese Academy of Land and Resource Economics, Sanhe, Hebei065201, China
  • Received:2012-06-26 Revised:2012-08-29 Online:2012-10-19 Published:2012-10-23

摘要:

内蒙古哈达门沟金矿13号矿体以含金石英钾长石脉为主,金大部分以包体金形式存在,少数存在于黄铁矿间隙中。金的颗粒大小为0.05~0.25 mm。成矿元素组合特征中Au与Ag、Bi、Pb等亲硫元素具有很高的相关性,显示金的成矿与多金属硫化物联系很密切。通过数据分析,绘制了元素空间分布图,并建立了原生晕轴向垂直分带序列:Au-Pb-(Ni-Co-Ag-Zn-As-Hg )-Cu-W-Bi-Sb-Mo。由于成矿多期叠加特点导致Ag、Sb、As等元素异常同时存在和部分轴向分带序列分带特征不明显。与典型金矿分带序列对比发现,前缘晕元素Sb出现在分带序列的下部,地球化学参数在矿体下方(标高658 m附近)发生转折,这些都暗示深部有隐伏矿体存在,通过后续实际生产实践也验证了本文推测。

关键词: 轴向分带, 原生晕, 矿化异常, 成矿预测, 哈达门沟金矿, 内蒙古

Abstract:

 The No.13 ore vein of Hadamengou gold deposit in Inner Mongolia occurs mainly in the auriferous quartz K-feldspar veins. Most of the gold occur in inclusion, and a few exist in the gap of pyrite. Gold particle size is approximately 0.05-0.25 mm. Based on characteristics of ore-forming elements combination, Au and chalcophile elements such as Ag, Bi, Pb are highly correlated, which shows the gold mineralization is closely related with polymetallic sulphides. According to the data analysis, space maps are drawn and the establishment of the primary halo axial vertical zoning sequence: Au-Pb-(Ni-Co-Ag-Zn-As-Hg)-Cu-W-Bi-Sb-Mo is done as well. Multistage superposition of mineralization lead to that Ag, Sb, As and other elements anomalies coexist and zoning characteristics of part axial vertical zoning sequence is not obvious. Compared with the typical gold banding sequence, the front halo element Sb appears in the lower part of the zone sequence and the geochemical parameters take a new turn at the bottom of known bodies (near the elevation 658 m), which imply the existence of concealed orebody in the deep. The subsequent production practices also verified this speculation.

Key words: axial zonation; , primary halo;mineralization anomaly;mineralization prediction;Hadamengou gold deposit;Inner Mongolia