Sedimentary Dynamics of Windfield-Source-Basin System by Zaixing Jiang

Author:Zaixing Jiang
Language: eng
Format: epub, pdf
Publisher: Springer Singapore, Singapore

The late initial rifting episode corresponds to sedimentation of Sha-4 Member (Es4), which was governed by NWW faults that were still active, and this episode stayed in a transition from dry climate to humid climate. In the early stage (Es4x), the interbeds of red mudstone, gray mudstone, and sandstone intercalated with halite and gypsum were deposited. In the late Upper Sha-4 Member, a set of shallow lacustrine to semi-deep lacustrine biolithite limestone, shallow lacustrine beach bar, and oil shale was developed, accompanied by erupted subalkaline tholeiite. The target horizon, i.e., Upper Sha-4 Submember in the study was in this very stage of tectonic evolution.

Occurrence of both early and late initial rifting episodes was controlled by NWW faults resulted from NE-SSE tensile stress. Besides the main controlling faults intensively developed in northern boundary, a series of large-scale sedimentation-controlling faults were developed inside the Dongying Sag, resulting in multiple subsidence centers in the same sag.(3)Rifting extensional episode

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