Abstract—

The geological and sedimentological interpretation of several time and deep seismic profiles within junction zone of the Volga‒Ural area of the East European Platform, Pre-Caspian Depression, Ural Foredeep, Bashkir Anticlinorium, and northern margin of the Scythian Platform allowed us to identify a number of previously unknown structural features of Later Precambrian and Early Paleozoic formation. On this basis, structural-facies maps were compiled for the Riphean and Vendian stages of development. It was shown that as a result of the collision of the southeastern passive margin of the continent Baltica with Scythia in the Early Vendian and with the Timanides of the Urals in the Later Vendian, a complex tectonic structure of the Orenburg tectonic node was formed, which forms the foundation of the Caspian oil and gas province. The results obtained substantially clarify the structure of the sedimentary cover of the East European Platform and the Pre-Caspian Basin, the stages of the formation and evolution of their structure, and the degree of influence on the sedimentation of structural changes in the adjacent territories of the folded Urals and the Scythian Platform.

中文翻译：

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前寒武纪—早古生代东欧平台东南部和里海盆地构造与发育特征

摘要—

在东欧平台伏尔加河地区的里加交界处，里海前凹陷，乌拉尔·福里迪普，巴什基尔反clinorium和Scythian平台北缘对几个时间和深部地震剖面的地质和沉积学解释，使我们能够确定一个后寒武纪和早古生代构造的许多先前未知的结构特征。在此基础上，为里菲安和文迪安发展阶段编制了结构相图。结果表明，由于波罗的海大陆的东南被动边缘与早文迪亚的Scythia和晚文迪亚的乌拉尔的Timanides碰撞，形成了奥伦堡构造节点的复杂构造结构，形成了里海油气省的基础。