Structural features and evolution in the piedmont belt in the middle segment of Longmen Mountains
Online published: 2008-12-15
The basic structural features in the piedmont belt in the middle segment of Longmen Mountains and the geological evolution are discussed. The research shows that the piedmont belt in the middle segment of Longmen Mountains is composed of Beichuan-Yingxiu fault, Anxian-Dujiangyan Dam fault and the nappe between them.Beichuan-Yingxiu fault was weakly thrusted in the early stage and was deformed in the late stage. Anxian-Dujiangyan Dam fault was deformed. Thrust plane developed well in the nappe, which was thrusted from NW to SE. The geological evolution displays that it is stable continental margin environment from Sinian to Middle Triassic and is continental clastic sedimentary stage in Late Triassic, and the foreland basin associated with the thrust tectonic appeared at the end of the Xujiahe Formation in Upper Triassic, the thrust activities further developed and entirely uplifted, which finally formed the current complex structure pattern.
Key words： reservoir; dual-porosity media; carbonate rocks; well test; production
LI Chuanliang . Structural features and evolution in the piedmont belt in the middle segment of Longmen Mountains[J]. Lithologic Reservoirs, 2008 , 20(4) : 59 -64 . DOI: 10.3969/j.issn.1673-8926.2008.04.011
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