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• 地球化学、矿床学与岩石学 • 上一篇    下一篇

干旱荒漠区隐伏金矿覆盖层中金的分布与迁移:以新疆金窝子金矿田210金矿带为例

叶荣1,张必敏2,王勇3   

  1. 中国地质大学(北京) 地球科学与资源学院,北京100083
  • 出版日期:2013-12-16 发布日期:2014-02-21
  • 作者简介:叶荣,女,教授,1956年出生,地球化学专业,主要从事勘查地球化学、矿床地球化学的研究工作。
  • 基金资助:

    国土资源部行业专项“深部探测技术与实验研究”子课题“盆地深穿透地球化学探测技术”(Sino Probe-04-03-03);国家自然科学基金项目(40473040,41273063);中国地质调查局国土资源大调查项目(1212011120206)。

Distribution and Migration of Gold in Gobioverlay of Arid Desert Terrain:Take the Jinwozi 210 Gold Belt in Xinjiang as an Example

YE Rong1,ZHANG Bimin2,WANG Yong3   

  1. School of Earth Sciences and Resources,China University of Geosciences, Beijing100083,China;
  • Online:2013-12-16 Published:2014-02-21

摘要:

以新疆金窝子金矿田210金矿带为例,实验研究了该区地气和土壤活动态测量等深穿透地球化学方法的效果。实验表明地气测量和土壤活动态测量可以有效地反映覆盖层下隐伏矿体。揭露矿体覆盖层的钻孔研究表明,金活动态形式具有“C”型分布特征。采集矿体上方地表异常位置土壤孔隙中地气、土壤样品,使用透射电子显微镜(TEM)实测样品中微粒物质的粒径、形貌和成分,在地气和土壤中观测到了Au-Cu、Au-Bi成矿元素纳米微粒,此微粒是形成地表深穿透地球化学异常的物质,来源于覆盖层下隐伏矿体。微粒到达地表,可以形成地气和土壤活动态异常。纳米微粒具有可从土壤颗粒表面分离的性质,在其向上迁移过程中,可以从吸附固定状态解吸,此性质可以用于解释活动态异常在钻孔垂直剖面上的“C”型分布。

关键词: 戈壁覆盖层, 隐伏金矿, 地气, 活动态, 纳米金属微粒, 金窝子201金矿带, 新疆

Abstract:

The deeppenetrating geochemistry methods for geogas and mobile elements survey were evaluated in Jinwozi 210 gold belt, Xinjiang. The experimental results in this paper confirm that these methods can effectively indicate the concealed ore bodies under the regolith cover. The drilling investigations revealed the “Cshape” distribution patterns of the mobile gold. The geogas and soil samples in surface anomalies were collected, in which the size, morphology and component of the particles were characterized by transmission electron microscope. Goldcopper and goldbismuth nanoscale particles were observed in the geogas and soil samples. It is believed that the nanoscale particles sourced from the underlying concealed ore bodies are likely to cause the surface geochemical anomalies. The nanoscale particles could travel upwards to the surface, during which the geogas and soil anomalies were developed in pore space and soil. The dissociation and desorption of the nanoscale particles from soil particles’ surface during their migration upwards probably created the “Cshape” distribution patterns of the mobile gold in vertical profiles in drilling holes.

Key words: Gobi overlay, concealed gold deposit, geogas, mobile form of element, nanoscale metal particles, Jinwozi 210 gold belt, Xinjiang

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