庐枞火山岩系与偏碱性石英正长岩带的同源特征及成因探讨

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。

Comagmatic Characteristics of the Luzhong Vocanic Rocks and Subalkaline Quartz Syenite Rock-Belt and Their Genesis

The Luzhong vocanic rocks and subalkaline quartz syenite rock belt whi ch consis ts of the Huangmeijian, Chengshan and Dalongshan batholiths are paragenetic a nd very similar in such characteristics as forming age, ge ology,mineralogy and petrology, petrochemistry, rare earth elements and trace el ements,isotopic compositions of Sr,Pb,Nd etc.,which shows that their origin ma y be alike. The magmas, which were related closely in genesis with the te ctonic activities in the depth, were derived from the mantle through partial me lting and contaminated by the crustal materials in the process of upwar d movement and emplacement along the deep faults.