全文快速搜索:          
引用本文:谢学锦. 全球地球化学填图[J]. 中国地质, 2003, 30(1): 1-9.
XIE Xue-jing. Global geochemical mapping[J]. Geology in China, 2003, 30(1): 1-9(in Chinese with English abstract).
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1575次   下载 600 本文二维码信息
码上扫一扫!
分享到: 微信 更多
全球地球化学填图
谢学锦
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
摘要:
提要:作者指出了1973年至今世界上50余项地球化学填图计划中普遍存在的缺陷大都涉及分析问题。1988~1992年实施的国际地质对比计划IGCP259项目旨在使全世界地球化学填图方法标准化。在此项目中对分析问题提出了若干规定,主要是要求今后的填图计划应统一分析71种元素,痕量及超痕量元素的检出限必须低于相应的地壳丰度值及采用中国的GSD和加拿大的STSD标样系列,以使全球数据可以对比,在其后开始延续至今的全球地球化学填图计划IGCP360,旨在用极低密度采样早日覆盖全球大陆。讨论了正在实行的两种极低密度采样方案,并提出通过极低密度采集地极少量样品示范性地实现IGCP259项目对分析要求的具体建议。
关键词:  勘查地球化学  地球化学填图  极低密度采样
DOI:
分类号:
基金项目:国家重点基础研究项目(G1999043214);中国地质大调查项目(1212010330206)资助。
Global geochemical mapping
XIE Xue-jing
Institute of Geophysical and Geochemical Exploration, Langfang 065000, Hebei, China
Abstract:
Abstract:The deficiencies in more than 50 national and regional geochemical mapping projects in the world carried out from 1973 to present are all analytical in character. The IGCP259 Project under the aegis of UNESCO's IGCP Program carried out from 1988 to 1992 aimed to standardize geochemical mapping methods used in the world. This project advances several analytical requirements for forthcoming geochemical mapping projects, which mainly include the following: 71 elements should be analyzed in the future mapping projects; the detection limits of trace and ultratrace elements must be lower than the corresponding crustal abundances and the Chinese GSD and Canadian STSD standard sample series should be used for the correlation of global data; the aim of the IGCP360 Project (Global Geochemical Mapping Project) is to use 5000 composite samples taken at very low sampling densities to cover the whole Earth's land surface. Besides social,political and economic problems, the main bottleneck is the difficulties to meet IGCP259 analytical requirements by many countries. The best way to solve this bottleneck is proposed in the present paper.
Key words:  exploration geochemistry, geochemical mapping, extremely low density sampling