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区域地球化学异常评价的现状及其存在的问题
引用本文:王瑞廷,毛景文,任小华 旺军谊 欧阳建平 袁炳强.区域地球化学异常评价的现状及其存在的问题[J].中国地质,2005,32(1):168-175.
作者姓名:王瑞廷  毛景文  任小华 旺军谊 欧阳建平 袁炳强
作者单位:1. 中国地质大学地球科学与资源学院,北京,100083;西北有色地质勘查局地勘院,陕西,西安,710054
2. 中国地质大学地球科学与资源学院,北京,100083;中国地质科学院矿产资源研究所,北京,100037
3. 西北有色地质勘查局地勘院,陕西,西安,710054
4. 中国地质大学地球科学学院,湖北,武汉,430074
5. 中国地质调查局发展研究中心,北京,100037
基金项目:中国地质调查局地质大调查项目(200310200001),国家重点基础研究发展规划项目(G1999043211)资助
摘    要:区域地球化学异常评价是勘查地球化学长期以来面临的主要问题,目前通常采用的评价方法基本上包括地球化学异常的不同地质一构造单元评价法和多元素定量化评价指标法等8种方法。这些异常评价方法缺乏从成岩成矿系统的发展演化上去认识异常的表象与本质,关于表生因素对异常的制约和异常形成机制及异常产生的地质一地球化学环境的研究不够,只是提取和利用异常本身的信息。因此,研究成矿及矿化指示元素在原生带和表生带不同介质中的赋存相态、相对比例,总结其在不同景观环境下的迁移聚散规律,并在此基础上分析表生异常形成机制,系统剖析控制异常发育的各种内、外因素,进而选择区域异常评价指标,建立定性与定量相结合的区域异常评价指标体系,是区域地球化学异常评价的新思路。

关 键 词:异常评价  区域地球化学  成矿系统  地球化学异常  勘查地球化学  构造单元  地质  定性与定量  指标法  形成机制
文章编号:1000-3657(2005)01-0168-08

Facts and problems of the evaluation of regional geochemical anomalies
WANG Rui-ting,MAO Jing-wen,REN Xiao-hu,WANG Jun-yi,OUYANG Jian-ping,YUAN Bing-qiang.Facts and problems of the evaluation of regional geochemical anomalies[J].Chinese Geology,2005,32(1):168-175.
Authors:WANG Rui-ting  MAO Jing-wen  REN Xiao-hu  WANG Jun-yi  OUYANG Jian-ping  YUAN Bing-qiang
Institution:WANG Rui-ting1,2,MAO Jing-wen1,3,REN Xiao-hua2,WANG Jun-yi2,OUYANG Jian-ping4,YUAN Bing-qiang5
Abstract:Regional geochemical anomaly evaluation is a major problem which exploration geochemistry has faced for a long time. Now, there are mainly eight conventional methods for evaluation, such as the geological-tectonic unit evaluation method and multi-elements quantifying evaluation index method. By using these anomaly evaluation methods, we fail to have a good understanding of the superficial appearance and essence from the development and evolution of the petrogenetic and metallogenic system, and the constraining of anomalies by supergene factors, genetic mechanism of anomalies and geological-geochemical environment produced by anomalies are less studied and only the information of the anomaly itself is extracted and used. Therefore, the study of the phase states of occurrence and relative proportions of ore-forming and mineralized indicator elements in different media of the primary and supergene zones, summing-up of the characteristics of element migration, accumulation and dispersion in different environments, analysis of the genetic mechanism of supergene anomalies on that basis, systematic anatomy of various internal and external factors controlling anomaly development and further selection of indices for regional anomaly evaluation and establishment of a combined qualitative and quantitative regional anomaly evaluation index system are a new concept for evaluating regional geochemical anomalies.
Keywords:regional geochemical anomaly  anomaly evaluation  supergene geochemistry  problem  new method
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