地质环境太古宙含金绿岩带在向斜形态、面积大小、具有绿片岩到闪岩相的变质程度、构造格式、火山—沉积岩组合、地层以及与花岗岩类岩石的关系方面,都有紧密的相似性(图1和2a、b、c)。表Ⅰ总结了印度、南非(阿扎尼亚)、澳大利亚和加拿大绿岩—花岗岩含金火山岩带的地层及其同位素年龄。从该表可以看出,每条带的熔岩和片麻岩的年龄是可对比 Geological environment Archean gold-bearing greenstone belts are closely related to the morphology of the syncline, the size of the area, the degree of metamorphism of the greenschist to amphibolite facies, the tectonic format, the volcanic-sedimentary assemblage, the strata and the relationship with the granitic rocks Similarity (Figures 1 and 2a, b, c). Table I summarizes the stratigraphy and isotopic age of the Greenstone-Granite gold-bearing volcanic belt in India, South Africa (Azania), Australia and Canada. As can be seen from the table, the age of lava and gneiss in each belt is comparable