摘要
华北地台南缘燕山期花岗斑岩类小岩体形成于大陆板内环境,它具有类似岛弧—活动大陆边缘钙碱系列岩石地球化学特征,其成分在空间上呈现极性特征。本文探讨了这种成分极性与中、新生代俯冲带花岗岩类的可比性,并根据锶、钕同位素资料揭示成岩物质的可能来源及造成成分空间变化的可能原因。
The Yanshanian granite - porphyries along the southern margin of North China Craton were developed in an intraplate environment. They have geochemical characterstics similar to calc-alkaline suites of island-arc and active Continental margins and show spatial compositional polarity that is comparable to the polarity exhibited by the Mesozoic-Cenozoic subduction granites in the same region. Source of the intraplate porphyries and genesis of their polarity are discussed by Sr -Nd isotopic data.
出处
《地球科学（中国地质大学学报）》
EI
CSCD
北大核心
1994年第3期383-389,共7页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金
地质行业科学发展基金联合资助项目(项目号48970171)
关键词
花岗斑岩
地球化学
成分
变化规律
intraplate granite-porphyry
compositional polarity
geochemical characteristic
southern margin of North China Craton.
