塔里木盆地中北部斷裂體系劃分及形成機(jī)制探討
[Abstract]:Based on seismic geological interpretation, the flat and profile characteristics of fault system in the central and northern part of Tarim Basin are described, and the structural models, formation mechanism and evolution history of different fault systems are analyzed. The results show that the area is divided into four fault systems: (1) the "X" type strike-slip fault system of Toputai, in which the NNE,NNW conjugate shearing fracture to "X" type and the "1" zigzag vertical structure are mainly developed in the Lower Paleozoic. The Mesozoic and Cenozoic strata are characterized by NNE echelon extensional positive faults, negative flower-like and graben structures. (2) in the NW thrust fault system in the tower, the near NW basement involvement type or slip thrust fault is dominant, and the "y" zigzag structure is developed; (3) in Shunto NE strike-slip fault system, Ordovician and its lower layers show near NE strike-slip and "1" vertical, orthotypic structure, while Silurian Devonian mainly developed near NE extensional positive faults and negative flowers. Graben structure; (4) the "T" type fault system under Tahe salt, the Lower Paleozoic strata are composed of near EW thrust fault and near SN,NNE strike-slip fault, the Mesozoic strata mainly develop NEE direction, and the near SN oriented Yanliang type tensional normal fault group. (4) the lower Paleozoic strata are composed of near EW thrust fault and near SN,NNE strike-slip fault. The study of the fault system clarifies the superposition and transformation process of the compression-torsional strike-slip and the tension-torsional strike-slip in the studied area, and it is considered that it is mainly controlled by the subtractive closure and collision orogeny of the Paleo-oceanic basin in the margin of the basin. Based on the tectonic dynamic background analysis of the study area, the evolution process of the fault system in this area is divided into the strong compression and weak strike-slip period of the Middle late Ordovician and the strong compressive strong strike-slip period of the late Silurian and the Middle Devonian. The late Carboniferous early Permian strong extensional weak strike-slip period, the late Permian-Triassic strong compression-weak strike-slip period and the Jurassic-Neogene weak compression-weak strike-slip period.
【作者單位】： 西南石油大學(xué)地球科學(xué)與技術(shù)學(xué)院;中國石化西北油田分公司勘探開發(fā)研究院;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃“973計(jì)劃”項(xiàng)目(2012CB214800) 國家科技重大專項(xiàng)(2011ZX05005-004)資助
【分類號(hào)】：P618.13
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