汉代译经家。安息国人。生卒年不详。东汉灵帝末年至洛阳,以功拜骑都尉,故世称‘都尉玄’。博诵群经,以弘法为己任,渐解汉语后,常与沙门讲论道义。光和四年(181),与严佛调共译法镜经二卷、阿含口解十二因缘经一卷等,皆能巧尽微旨,时人咸谓后人难有能继者。[出三藏记集卷二、卷十三、梁高僧传卷一、历代三宝纪卷四、开元释教录卷一]
岩石类型包括杏仁状玄武岩、粗玄岩、块状玄武岩、橄榄玄武岩和安山玄武岩,属碱性玄武岩系列。
The rock types include amygdaloidal basalt, dolerite, massive basalt, olivine basalt and andesite-basalt, which belong to the alkali basalt series.
岩石学、元素地球化学研究表明,相山铀矿田的英安斑岩属于板内型钾玄质岩类,为钾玄质英安斑岩。
Studies of petrology and elemental geochemistry indicate that the Xiangshan uranium ore-field dacite porphyry belongs to intra-plate shoshonitic rock type and is a kind of shoshonitic dacite porphyry.
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