摘要
本文详细论述了绍兴—诸暨双溪坞群金的概率分布型式和金在各类岩石中的分配,指出双溪坞群金服从对数正态分布;金在各类岩石中分配极不均匀,其中细碧岩和角斑质凝灰岩是双溪坞群主要载金岩石,千糜岩是金的富集岩石。在对各类岩石样品金含量进行对数正态检验的基础上,采用对样品数加权计算获得双溪坞群含金丰度(7.53ppb)。文章最后通过微量元素对金在地质历史中地球化学行为指示信息的研究,阐明双溪坞群在地质历史中可能经历了三次不同的金矿化作用。
The Shuangxiwu Group occurs as a belt in the area from Shaoxing to Zhuji, Zhejiang Province. It is represented by Proterozoic marine volcanic rocks and has undergone regional metamorphism so as to reach greenschist facies and Iocally even amphibolite facies. This paper mainly discusses the gold potentiality of the Shuang xiwu Group.Based on the probability distribution pattern of gold and distribution of gold in various kinds of rock, the authors indicate that the probability distribution pattern of gold is normal logarithmic distribution and that the gold distribution is completely non-uniform in different kinds of rock. The abundance of gold in the whole Shuangxiwu Group has been determined to be 7.53 ppb. Finally it is suggested through trace element geochemical study that the Shuangxiwu Group had undergone at least three different types of gold mineralization in the geological history.
出处
《地质论评》
CAS
CSCD
北大核心
1991年第2期179-185,共7页
Geological Review
