摘要
本文对华东地区的花岗岩类按改造型 变质混合交代型、重熔型和同熔型———同熔型 (Ⅰ型 )、深源分异型 (A型 )进行了成因分类 ,并对各类花岗岩的岩石化学成分、岩石学特征、副矿物、稀土元素、锶、氧同位素等特征进行了较为详细的论述 ,列举了各类花岗岩的分布地区和代表性岩体 ;论述了各类花岗岩的空间分布与铀矿床产出的关系 ,指出重熔型花岗岩是铀矿床产出的主要岩体类型 ,其次是深源分异型 (A型 )花岗岩。变质混合交代型和同熔型 (Ⅰ型 )花岗岩只有铀矿点或矿化点产出。文章最后系统地总结了改造型与同熔型花岗岩的铀矿化特征。
This paper makes a genetic classification of granitoids in eastern China,and reworking type,metamorphic-mixed metasomatic type,crust-remelting type and syntectic type(including syntectic type(I) and deep-source differentiation type(A)) are divided.In the mean time,a more detailed description of petrologic-chemical composition,petrologic features,accessory minerals,rare earth element,strontium and oxygen isotopic composition of these granites is given,the distribution area of different granitoids and representative massifs are listed,the relationship between the spatial distribution of different granites and the occurrence of uranium deposits is discussed.It is proposed that main granitic massifs closely associated with uranium mineralization are of the crust-remelting type,and,to some extent,deep-source differentiation type.The granites of syntectic type(I-type)and metamorphic-mixed metasomatic type are associated only with uranium occurrences.Finally,uranium mineralization associated with reworking type and syntectic type are systematically summarized.
出处
《铀矿地质》
CAS
CSCD
2004年第6期330-336,共7页
Uranium Geology
关键词
改造型花岗岩
同熔型花岗岩
铀矿化
华东地区花岗岩类
curst-reworking type granite
syntectic type granite
uranium mineralization granitoid in eastern China
