【摘要】 地壳深部结构开始引起重视。中地壳与油气、金属矿床、地震之间的关系特别受到关注。地震低速、高导低阻、低密度是中地壳的主要地球物理特征。研究表明:当中地壳地震波速vp<6.0km/s,密度ρ<2.75g/cm3时,有油气生成及油气藏;而当中地壳地震波速vp>6.0km/s,密度ρ>2.75g/cm3时,则有金属Fe、Cu、Ni、Au等成矿。深入研究中地壳的地球物理体的地质属性对油气、金属成矿、地震等的预测有重大意义,特别对大型、超大型油气田、金属矿床的勘探有重要意义。更多还原

【Abstract】 The de ep structure of the earth crust is a topic focus.The relation among petroleum,me tal deposit,earthquake and mid-crust is con-cerned.Low seismic velocity,hig h conductivity(low resistance),low density are the important geophysical fea tures of the mid-crust.The investi-gation shows that when the seismic veloci ty of the mid-crustí P <6.0km/s,?<2.75g/cm 3 ,there exist hydrocarbon generation and oil-gas reser-voirs;whení P >6.0km/s,?>2.75g/cm 3 ,there exist Fe,Cu,Ni,Au and other metal deposits.To study the geologic al features of the mid-crust is of significance for exploration of oil-gas and metal deposits,particularly,for big and giant oil-gas fields and metal depo sits,and for pre diction of the earthquakes as well.更多还原