Abstract:Shunnan area, located in the northern Tazhong uplift of Tarim Basin, is affected by multi-stage tectonic stress with a large number of developed strike-slip faults. Detailed interpretation and deep analysis of 3D seismic data show the faults are varied in vertical and plane views with multi-stage structural superposition. There are mainly 3 groups, i.e. NE, NEE, and NW, of strike-slip faults developed in the study area. The NE-trending faults are highly active, with en echelon and horsetail structures developed on the plane, and composite flower structures of symmetric flower, positive and negative flowers superimposed on the profile; while the NEE and NW faults are less active, with single vertical strike-slip fault dominated on the profile, and linear extension or multi-section synthetic strike-slip faults connected on the plane. According to the structural style and stress property, the FSN1 can be divided into 4 segments along the strike, including 2 composite flower-tensional segments and 2 simple flower-compressional segments, which occur alternately along the strike. The strike-slip faults mainly went through 5 stages of tectonic movements:the Early Caledonian, Episode I of Middle Caledonian, Episode III of Middle Caledonian, Late Caledonian-Early Hercynian and Late Hercynian, among which, the second and third are the main stages for fault activity.
孔永吉, 吴孔友, 刘寅. 塔里木盆地顺南地区走滑断裂发育特征及演化[J]. 地质与资源, 2020, 29(5): 446-453.
KONG Yong-ji, WU Kong-you, LIU Yin. DEVELOPMENT AND EVOLUTION OF THE STRIKE-SLIP FAULTS IN SHUNNAN AREA, TARIM BASIN. GEOLOGY AND RESOURCES, 2020, 29(5): 446-453.
Deng S, Li H L, Zhang Z P, et al. Structural characterization of intracratonic strike-slip faults in the central TarimBasin[J]. AAPG Bulletin,2019,103(1):109-137,doi:10.1306/06071817354.
Dooley T P, Schreurs G. Analogue modelling of intraplate strike-slip tectonics:a review and new experimental results[J]. Tectonophysics, 2012,574-575:1-71.
[13]
Xiao Y, Wu G H, Lei Y L, et al. Analogue modeling of through-going process and development pattern of strike-slip fault zone[J]. Petroleum Exploration and Development, 2017,44(3):368-376.