北京地区中元古代与中生代火山岩的酸度、系列、构造环境及岩浆成因

本文对北京地区中元古代及中生代火山岩的地质学、岩石学、矿物化学、地球化学、岩石成因学及构造环境学进行了综合研究。对火山岩的时空分布及成分变化进行了论述，对酸度频率及岩浆系列进行了分析，对构造环境及拉张距离进行了估算，对岩浆的来源及演化机理进行了探讨。

The Acidity,Series,Tectonic Settings and Magmatic Origin of Middle Proterozoic and Mesozoic Volcanic Rocks from Beijing Area

In this paper,the authors has studied the geology, petrology, mineral chemistry, geochemistry,petrogenesis,tectonic environment of Middle Proterozoic and Mesozoic volcanic rocks from Beijing area, discussed the spatial and temporal distribution and compositional variation of volcanic rocks, analysed the acidity frequency and magma series, estimated the tectonic settings and pull-apart distance,and evaluated sources and evolutional mechanism of magma.