摘要
庐枞火山岩系与由黄梅尖、城山和大龙山3个岩体组成的偏碱性石英正长岩带在野外紧密共生,他们的Rb-Sr等时线年龄在分析误差范围内相当一致,约为135 Ma,^(87)Sr/^(86)Sr初始比和Nd、Pb同位素组成也很相似,显示了成因上的渊源关系以及成岩物质来源较深且受到了上部地壳的混染等特征,反映了深部地质构造条件对岩浆活动的制约。
The Luzhong vocanic rocks and subalkaline quartz syenite rock-belt which consists of the Huangmeijian, Chengshan and Dalongshan batholiths are paragenetic and very similar in such characteristics as forming age, geology, mineralogy and petrology, petrochemistry, rare earth elements and trace elements,isotopic compositions of Sr,Pb,Nd etc. ,which shows that their origin may be alike. The magmas, which were related closely in genesis with the tectonic activities in the depth, were derived from the mantle through partial melting and contaminated by the crustal materials in the process of upward movement and emplacement along the deep faults.
出处
《地质论评》
CAS
CSCD
北大核心
1999年第S1期707-711,共5页
Geological Review
