识别分散矿化的地球化学勘查方法探讨——以内蒙古垦山试验区为例  

A Tentative Discussion of Geochemical Exploration Methods for Discrimination of Dispersive Mineralization

作　　者：马生明[1] 朱立新[2] 席明杰[1] 胡树起[1] 

机构地区：[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]中国地质科学院,北京100037

出　　处：《地质与勘探》2011年第6期1124-1132,共9页Geology and Exploration

基　　金：国家科技支撑计划课题(编号:2006BAB01A10)资助

摘　　要：分散矿化的识别对提高地质找矿工作效率、适量控制资金投入具有重要意义,但是有关这方面的试验研究工作很不系统。文章以内蒙古垦山地区经钻孔验证未见矿的多元素组合异常为例,通过原生异常特征、矿石矿物化学计量关系、贫化元素指示作用等方面的综合分析,对识别分散矿化的地球化学勘查方法进行了探讨。结果表明,原生异常分带及元素组合特征是区分矿致异常与分散矿化的有效手段之一,矿化过程中发生贫化元素的含量或异常状况,可以从与元素富集相对应的方面为判断异常成矿与否提供依据。The discrimination of dispersive mineralization is of significance for improving prospecting efficiency and appropriately controlling fund in- put. The rseareh of this aspect is, however, not systematic or sufficient. In this paper, with the composite anomalies of multi-elements, which present un- mineralized validated by drills, in the Kenshan region, Inner Mongolia as an example,we make a tentative discussion of geochemical exploration methods about the discrimination of dispersive mineralization. We conducted a comprehensive analysis of characteristics of primary anomalies, stoichiometric relationship between ore and mineral and indication of depleted elements, The results show that the primary anomaly zoning and the characteristics of composite elements are one of effective methods to discriminate mineralized anomalies and dispersive anomalies. Moreover, the content of depleted elements and the status of anomalies, which correspond to element enrichment, could provide evidence for determining whether the deposit was generated.

关 键 词：分散矿化 地球化学勘查方法 原生异常 贫化元素 

分 类 号：P632.2[天文地球—地质矿产勘探]