【摘要】 通过对新疆塔里木盆地、准噶尔盆地地震转换波地震速度的统计和地质分析,并与云南扬子地台、宁夏—内蒙古的鄂尔多斯地台、华北地台的地震纵波速度特征对比后认为,准噶尔盆地缺失硅铝层,浅变质的下古生界“褶皱基底”直接覆盖于硅铝镁层之上,缺失深变质岩系即“结晶基底”。塔里木盆地、云南扬子地台、宁夏—内蒙的鄂尔多斯地台、华北地台具有相似的壳幔速度特征。这一研究成果为研究准噶尔盆地、塔里木盆地的基底结构及演化提供了新的看法。更多还原

【Abstract】 This paper makes statistics and analysis of seismic velocity in seismic transformed wave in Junggar basin and Tarim basin,and comparison of these with compressional wave velocity features from Yangzi platform(Yun-nan province),Erdos platform(Ningxia-InnerMongolia)and Huabei platform(North China).It is considered that in Junggar basin sialic layer is absent,and epimetamorphic"folded basement "of Lower Paleozoic directly overlapped on sialma,without hypometamorphic rock formation(i.e.,"crystalline basement ").However,Tarim basin,Yangzi platform,Erdos platform and Huabei platform are all characterized by similar crust-mantle velocity.更多还原