Paleozoic Fault Feature and Its Formation Mechanism in YM 1-2 Block District of Tabei Uplift
Received date: 2011-11-29
Revised date: 2012-02-01
Online published: 2012-04-10
The YM 1-2 structural belt in the Yingmaili low bump tectonic unit of the western Tabei uplift is a large dome anticline on the Cambrian salt.The anticline was formed in the Haixi period and was shaped in the Indosinian period.Several periods of tectonic movements made a lot of faults with kinds of tectonic styles formed.The mechanisms of fault formation are complicated.The application of the ant tracking technology to interpret the faults in the Yingmai 1-2 3D block gives effective guidance to describe and understand these faults.In the work area,we divide all faults into four phases,i.e.middle Caledonian,Early Hercynian period,late Hercynian,and Hercynian-Indosinian.We illustrate the formation mechanism of each fault at different periods.This result will provide the evidence for building relationship between faults and hydrocarbon accumulation.
Key words: Tabei uplift; YM 1-2 block; Fault feature; Formation mechanism.
ZHOU Jun-Feng, ZHANG Hu-Quan, LIU Jian-Xin, YAO Qing-Zhou, WANG Jin-Xi . Paleozoic Fault Feature and Its Formation Mechanism in YM 1-2 Block District of Tabei Uplift[J]. Natural Gas Geoscience, 2012 , 23(2) : 237 -243 . DOI: 10.11764/j.issn.1672-1926.2012.02.237
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