关键词: 沉积体系, 物源方向, 红层沉积期, 东营凹陷

Abstract:

Based on the detailed analysis of geological data，seismic data and geochemical data，through the method of the dividing of structure evolution stages and recovery of palaeogeomorphic，combined with provenance sedimentary system，the paper studied the temporal and spatial evolution features of sedimentary system and provenance orientation in the red-bed sedimentary period in the western area of Dongying Sag. The period in the western area of Dongying Sag was divided into the 1st of Kongdian Formation and the lower part of the 4th member of Shahejie Formation. Before deposition of the 1st member of Kongdian Formation，the Luxi uplift，Guangrao bump，Chenjiazhuang bump，Binxian bump and Wudi bump were formed. The main faults are Chennan Fault，Binnan Fault，Yangxin Fault，Shicun Fault and Gaoqing-Pingnan Fault and so on. The whole basin presents the palaeogeomorphic of bumps around，east low，and w est high and flat terrain in the west. The provenance of the western area of Dongying Sag in the early stage of Kongdian-Shasi is mainly from the northwest and the south orientations. There are two further provenance systems of Wudi to Binxian bump，Luxi uplift，and one provenance system of Pingnan Fault.  There are sedimentary systems such as alluvial fan-braided river-lake system，alluvial fan-alluvial plain-lake system，lake-beach bar and subaqueous fan-lake system. The changes of palaeogeomorphic，provenance and ancient climate influence the temporal and spatial evolution of the sedimentary system with the characteristics of inheritance and difference.

Key words: sedimentary system, provenance orientation, red-bed sedimentary period, Dongying Sad