化探异常筛选及查证工作方法

METHODS OF SELECTION AND FOLLOWING UP FOR GEOCHEMICAL EXPLORATION ANOMALY

化探异常筛选的步骤或程序主要有五个阶段，具体的筛选方法包括地理要素筛选法，区域成矿地质环境筛选法，异常特征及其解译、分类、排序筛选法，物、化、遥筛选法和计算机智能化筛选法等五个大的方面，２１个小项的内容。化探异常查证分为Ⅲ、Ⅱ、Ⅰ级三个查证工作阶段。Ⅲ级异常查证分为异常踏查－水系沉积物加密取样、异常初查－土壤地球化学测量和异常详查－综合物化探及轻型山地工程三个方法步骤。Ⅱ级化探异常查证的方法则是以大比例尺物化探测量为主，可有稀疏浅部工程控制。Ⅰ级化探异常查证主要实施系统的浅部控制及稀疏深部工程控制，为晋升普查阶段作准备。总之，化探异常查证的主要工作方法仍然以地球化学找矿方法为主，并与地质方法相结合，必要时辅以简便可行的物探方法及痕金测试手段（金的化探异常查证）与之配合。

The steps of the selection of geochemical exploration anomaly include: 1.special selection for some special anomaly;2.systematic selection for all anomaly;3.detailed selection through interpretation,classification arrangment in order; 4.distinctive selection for some complex anomaly; 5.comprehensive selection with computer for all anomaly. And there are 3 stages of follow up for geochemical exploration anomaly(Ⅰ,Ⅱ,Ⅲ). Ⅲ grade follow up includes:1.preliminary survey:sampling stream sediment;2.detailed follow up: soil geochemistry survey;3.seeking the causes of anomaly: composite geophysic and geochemical exploration. Ⅱ grade follow up is major in large scale geophysic and geochemical surveying. Ⅰ grade follow up is systematic shallow construction controlling, and sparse but deep construction controlling.