摘要
浙江青田地区广泛发育一套中生代的火山─侵入杂岩。本文详细地研究了该火山岩、侵入岩类的岩石化学和地球化学等特征．通过岩石的化学成分和痕量元素等判别，青田地区火山岩与钙碱性花岗岩同源，属大陆弧火山岩、花岗岩类，青田碱性花岗岩属大陆造陆抬升花岗岩，它们均形成于拉张的构造背景。青田地区火山─侵入杂岩的形成与中生代库拉板块的运动有密切关系。
Mesozoic volcanic-intrusiver complex is widely distributed in Qinstisn area, Zhejiang Province.The characteristics of Petrochemistry and geochemistry of the volcanic - intrusive rocks are studied in thiS paper. According to the ChemiCal composition and trace elements of the rocks,there is a close genetic relation betWeen the cafe -alkaline granites and the volcanic rocks. They belong to continental ars’volcanic rocks and sranites. The Qinstian alkaline sranite is continental epeirogenteic uplift granite. They formed in the extensive tectonic setting. The formation of the volcanic intrusive complex is related tl the Mesozoic Pacific plate’s activity.
关键词
火山-侵入杂岩
地球化学
板块构造
volcanic - intrusive complex
active continental margin
plate tectonic setting
