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大别山造山带前陆深地震反射剖面
A Deep Seismic Reflection Profile across a Foreland of the Dabie Orogen
【摘要】 在大别山南部和扬子地块前陆实施的深地震反射剖面(140 km)揭示出大别山造山带前陆地壳的精细结构。总体北倾的地壳内部结构与向北缓倾的叠瓦状莫霍面反射揭示出扬子陆块向北俯冲的行迹。莫霍面向北插入大别山造山带下与南大别山地壳内南倾反射震相叠置,构成交叉反射图像,刻画出扬子前陆与大别山造山带的碰撞构造面貌。
【Abstract】 A 140km seismic reflection profile across the southern Dabie orogen and the Yangtze foreland reveals the detailed structures of the crust beneath the region. The generally north-depping crustal structures and the gently north-dipping Moho interface with several imbricate segment are referred to as the traces of a northward underthrusting of the Yangtze block. The Moho that underthrusts beneath the Dabie orogen and the south-dipping reflections of southern Dabie create a crossed reflection image, depicting the collisional structure beneath the collision of the Yangtze foreland and Dabie orogen.
【Key words】 Dabie orogen; foreland; deep seismic reflection profile; Yangtze block; ultrahigh-pressure metamorphic rocks; continental underthrust;
- 【文献出处】 地质学报 ,Acta Geologica Sinica , 编辑部邮箱 ,2005年05期
- 【分类号】P545
- 【被引频次】40
- 【下载频次】433