摘要
本区侵入岩由印支-燕山早期花岗闪长岩-石英闪长岩和燕山晚期花岗斑岩-石英斑岩组成。与金矿化密切相关的是分异程度较差的印支期同熔型花岗闪长岩-石英闪长岩;与W、Sn、Mo等多金属矿化有关的为燕山晚期改造型花岗斑岩和石英斑岩。另据已知地区46个样品的硅酸盐分析结果,在贝叶斯准则下建立了它们的成矿专属性判别模型,经(?)1例本区未知岩体样品的回归判别和F检验,结果与地质结论吻合,该模型可用于成矿预测。
The intrusives in this area consist of the granodiorite-quartzdiorite of Indo-Chinese epoch and the late Yanshanian graniteporphyry-quartzporphyry. The Au mineralization is closely related to the former with low differentiation. The polymetal mineralization such as W, Sn and Mo have close realtionship with the late Yanshanian graniteporphyryquartzporphyry with high differentiation, In addition, according to the composition of 46 samples from the other area, discriminant model on the basis of Beyes rule is the established. 31 samples from the studied area have been checked and the results have been justified.
关键词
花岗岩
中生代
成矿专属性
granitoid
Mesozoic era
metallogenic specialization
discriminant analysis
Guangxi
Cangwu
