Abstract

This study summarizes the most recent geological and geophysical data on the Zeya–Bureya sedimentary basin (Russian Far East). The sedimentary cover stratigraphy is described. Based on a comparative analysis of the Zeya–Bureya sedimentary basin and the Songliao basin (China) located to the south that is similar in its tectonic nature, structure, and geological history, the Ekaterinoslavka Formation that makes up the sedimentary cover base and was formerly assigned to the Jurassic, is of Lower Cretaceous in age. The old CDP data (2014–2018) were reinterpreted to infer the seismostratigraphic characteristics of the section and to identify six geoseismic sequences. The wave pattern of the constructed sections confirms the synrift nature of the grabens at the base of the sedimentary cover of the Zeya–Bureya sedimentary basin. Thickness maps of the Cretaceous formations and a tectonic map of the sedimentary cover were compiled from the core and deep drilling data, as well as from the 2D and 3D CDP seismic survey results, taking the integrated interpretation of gravity, magnetic, and geological survey information into account. The evolution of the study area was subdivided into four stages: synrift, early syneclise, late syneclise, and neotectonic.

中文翻译：

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基于钻井资料和地震地层综合解释结果的泽亚-布列亚沉积盆地地质结构

摘要

本研究总结了 Zeya-Bureya 沉积盆地（俄罗斯远东）的最新地质和地球物理数据。描述了沉积盖层地层学。通过对泽亚—布列亚沉积盆地与南部松辽盆地在构造性质、结构和地质历史上相似的对比分析，构成沉积盖层基底的叶卡捷琳诺斯拉夫卡组是以前的沉积盆地。属于侏罗纪，年龄属于下白垩纪。对旧的CDP数据（2014-2018）进行了重新解释，以推断该剖面的地震地层特征并识别出六个地质序列。构造剖面的波浪模式证实了 Zeya-Bureya 沉积盆地沉积盖底部地堑的同裂谷性质。根据岩心和深钻数据以及2D和3D CDP地震勘探结果，综合解释重、磁和地质勘探信息，编制了白垩系地层厚度图和沉积盖层构造图考虑到。研究区演化可细分为同裂谷、早划线、晚划线和新构造运动四个阶段。