|Table of Contents|

Deformation Characteristics and Genetic Simulation of Xiaoquan-Fenggu Structural Belt in West Sichuan Depression(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2011年第01期
Page:
45-53
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Deformation Characteristics and Genetic Simulation of Xiaoquan-Fenggu Structural Belt in West Sichuan Depression
Author(s):
YU Fu-sheng1WANG Yan-hua2LI Xiao-jian1FENG Zi-cheng1LI Xue-liang1
1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China; 2. No.5 Geological Brigade, Hebei Bureau of Geo-exploration and Mineral Development, Tangshan 063000, Hebei, China
Keywords:
West Sichuan Depression Xiaoquan-Fenggu structural belt deformation characteristic genetic mechanism physical simulation
PACS:
P542
DOI:
-
Abstract:
Based on structure maps of top surface of different members in Triassic Formation and typical profile interprtation, the deformation characteristics in Xiaoquan-Fenggu structural belt are regarded as horizontal zonation and vertical lamination. NNE trend structure belt that is vertical to the SN trend anticline belt of Hexingchang-Shiquanchang includes Xiaoquan anticline, Xinchang anticline, Hexingchang anticline and Fenggu anticline.Upper and lower structural layers have been divided on the basis of gypsum rock within Leikoupo Formation. Decollent faults and related folds that formed anticline trap developed in the upper layer, and fault-related fold did not develop in the lower part. According to the analyses of simulation result, main control factors of deformation since Mesozoic Era are the compress stress from two sides and non-homogeneous decollement layers. Four conclutions have been drawn as follow: ①strike zonation and vertical lamination is the typical deformation style in the study area; ②NEE detachment fold-fault system developed in the early-middle period of Yanshan Movement in Xiaoquan-Fenggu structural belt, which was controlled by combination process of compress stress from Longmenshan in the west part and Dabashan in the north part; ③SN anticline belt of Hexingchang-Shiquanchang which superimposed in Xiaoquan-Fenggu structural belt was controlled by the compress stress coming from Longmenshan from Late Yanshan Movement to Himalayan Movement; ④plane and profile simulation results indicate that non-homogeneous distribution of gypsum rock located on the bottom of Leikoupo Formation may be the main material factor to cause horizontal zonation and vertical lamination.

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Last Update: 2011-03-20