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Geometry and Kinematics of Wensu Swell in North Tarim Uplift(PDF)

《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

Issue:
2018年03期
Page:
318-
Research Field:
Publishing date:

Info

Title:
Geometry and Kinematics of Wensu Swell in North Tarim Uplift
Author(s):
CHEN Jiajun HE Dengfa SUN Fangyuan HE Lei
(School of Energy Resources, China University of Geosciences, Beijing 100083, China)
Keywords:
Tarim basin North Tarim uplift Wensu swell geometry kinematics fault-related fold
PACS:
P542
DOI:
10.7657/XJPG20180309
Abstract:
Wensu swell is located in the northwestern margin of Tarim basin, which belongs to western segment of North Tarim uplift. As a part of paleo-uplift in the cratonic basin, Wensu swell is an ideal object for studying the deformation behaviors in the interior of tectonic plates. Based on drilling data, logging information, 2D seismic data, Digital Elevation Model(DEM)and geological map and combining with the stratigraphic texture of periphery areas, the paper characterizes the geometries of Shajingzi boundary fault and Wensubei fault detailedly, and establishes a geometric and kinematic model with the guidance of fault-related fold theories. The study results suggest that Wensu swell is an inherited upwarping zone controlled by Shajingzi fault, Wensubei fault and basement uplift. Shajingzi fault was developed as fault propagation fold mode at the early stage, then broke through along the forelimb of the fold at the late stage and transtensional faults occured during the late Quaternary. Wensu swell formed at the end of Early Ordovician; its structure was shaped under the influence of the closing of South Tianshan Ocean at the end of Permian; Wensu swell stepped in relative tectonic silence stage during Mesozoic and strongly deformed due to the South Tianshan orogenesis during Cenozoic. Wensu swell and the peripheral area are shortened by about 35.40 km totally. Fine fault analysis, especially the staged fault analysis can be a breakthrough method to analyze complicated structures

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Last Update: 2018-05-31