摘要
分析二只哈拉地区地球化学勘查资料认为,在以二只哈拉为代表的祁连山高寒地区进行1∶5万水系沉积物测量,样品粒度取-40目,可获得较好成果。在海拔3000 m以上地段,采用1∶2.5万沟系次生土壤样测量,粒度取-40目上,欠合理性。采集小于0.5 cm的岩块,岩屑混合物测量,按原生晕的方法分析样品,能清晰圈定异常。各类化探异常成果预示了二只哈拉粱一带存在金矿(化)体,1∶1万岩屑异常基本圈定了矿化体范围。
Based on an analysis of the geochemical exploration data obtained in Erzhihala area, some conclusions have been reached： when 1： 50 000 stream sediment survey is conducted in Qilianshan subnival region represented by Erzhihala area, the sample granular- ity of -40 mesh can yield relatively good result; when the work is carried out in areas over 3 000 m above the sea level, the adoption of -40 mesh in 1： 25000 ditch secondary soil survey is not very reasonable; when the mixed rock fragments and lithic materials whose sizes are smaller than 0.5 cm are collected and the samples are analyzed according to the primary halo method, anomalies can be distinctly delineated. Geochemical outcomes imply that gold mineralized bodies do exist in Erzhihala area, and 1： 10 000 lithic anomalies can basically delineated the limits of mineralized bodies.
出处
《物探与化探》
CAS
CSCD
北大核心
2009年第1期27-30,共4页
Geophysical and Geochemical Exploration
关键词
甘肃省二只哈拉
地球化学勘查
水系沉积物异常
Erzhihala in Gansu Province
geochemical exploration
anomaly of stream sediments
