| 韩天成.东天山中段区域化探异常评价方法研究[J].地质与勘探,2011,47(5):885-893 |
| 东天山中段区域化探异常评价方法研究 |
| An Evaluation Method for Regional Geochemistry Anomalies in theMiddle Section of East Tian Shan Mountain Range, Xinjiang |
| 投稿时间：2009-12-27 修订日期：2010-10-09 |
| DOI： |
| 中文关键词: 东天山 化探 组合异常 因子分析 泛克里格 |
| 英文关键词: East Tian Shan, geochemical exploration, composite anomaly, factor analysis, universal Kriging |
| 基金项目:“十一五冶国家科技支撑计划重点项目-“中国新疆和中亚邻国矿产资源对比研究与高效勘查技术集成冶(2007BAB25B00)课
题名:东天山–北山成矿带整体研究与找矿靶区优选评价(2007BA25B04)。 |
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| 中文摘要: |
| [摘要]本文利用1/20 万区域化探数据,研究了东天山中段地区针对不同类型铜矿化的元素组合异常圈定方法。选择典型(含)铜矿床及其周围地段的化探测量点为建模样本,通过因子分析,查明针对不同矿化类型的指示元素定量组合;以因子得分为综合指标,用泛克里格剩余值圈定化探异常。结果得到3 个元素组合:Cu-Co-Ni-Mn-V-Fe-Cr 组合,与斑岩型和岩浆铜镍硫化物铜矿床有关; Pb-Mo-Ni-Cr 组合,与火山岩型铜多金属矿化有关;Cu-Mo-Hg-As 组合,与热液型或矽卡岩型铜矿床有关。圈定的三类组合异常分别与各类已知矿床(点)及其主要控矿因素的空间分(展)布比较一致,说明该方法能够较好地揭示化探元素组合异常、矿化类型及控矿地质因素之间密切相关的规律性,为该区地质成矿研究和找矿提供新信息。 |
| 英文摘要: |
| Abstract:Using regional geochemical data on a scale of 1:200000, element composite anomalies for various types of Cu mineralization in the middle section of the East Tian Shan mountain range were delimited. Taking geochemical measurement data of typical Cu deposits and their surroundings as modeling samples, indicator element quantitative assemblages for different mineralization types were determined through factor analysis. Based on the factor scores as comprehensive indices, the universal kriging residual value was applied to delimit geochemical anomalies. The result shows that there exist three types of element assemblages, i.e. , Cu-Co-Ni-Mn-V-Fe-Cr element assemblage associated with porphyry Cu and Cu-Ni sulfide deposits, Pb-Mo-Ni
-Cr element assemblage associated with igneous Cu-polymetallic mineralization, and Cu-Mo-Hg-As element assemblage associated with hydrothermal or skarn Cu deposits. These three types of composite anomalies are consistent with the known deposits and the main factors governing their spatial distribution. It demonstrates that this method can reveal the rules among composite anomalies of geochemical elements, mineralization types and ore-controlling factors, providing new information for geological studies and mineral prospecting.-Cr element assemblage associated with igneous Cu-polymetallic mineralization, and Cu-Mo-Hg-As element assemblage associated with hydrothermal or skarn Cu deposits. These three types of composite anomalies are consistent with the known deposits and the main factors governing their spatial distribution. It demonstrates that this method can reveal the rules among composite anomalies of geochemical elements, mineralization types and ore-controlling factors, providing new information for geological studies and mineral prospecting. |
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