济阳-昌潍坳陷火山岩地球化学特征及其动力学意义

通过对济阳-昌潍坳陷中、新生代火山岩的岩石化学、稀土元素和微量元素地球化学特征研究，进一步厘定了火山岩的产出环境。研究表明，该区火山岩以玄武岩、玄武安山岩和粗面玄武岩类为主，为大陆拉张背景下裂谷环境的产物。盆地演化至少经历了4个转型期，即中生代与孔店组沉积时期、孔店组与沙河街组沉积时期、沙河街组三段与沙河街组二段沉积时期、东营组与馆陶组沉积时期。

Geochemical behavior and its dynamics significance of the volcanics in Jiyang - Changwei Depression

Occurrence environment of the volcanics was determined through the research on the geochemical behavior of rock chemistry, rare earth element and microelement of Mesozoic and Caenozoic volcanics in Jiyang - Changwei Depression. The research showed that the dominant volcanics in this area was basalt, basaltic - an-desite and rough surface basalt type,which was the result of rift environment at the background of continental tension. Basin evolution went through four transition stages at least: Mesozoic and Kongdian formation depositional stage, Kongdian formation and Shahejie formation depositional stage,the third member and second member of Shahejie formation depositional stage, Dongying formation and Guantao formation depositional stage.