塔中隆起古生代构造演化的分段差异性分析

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应用平衡剖面技术探讨了塔中隆起东、西段古生代构造演化的时空差异性。结果表明,早奥陶世塔中西段在伸展背景下拉张沉降,而塔中东段已出现隆起雏形。中奥陶世-晚奥陶世,塔中隆起构造形态基本定型,东段构造变形和隆升强度高于西段。该区东强西弱的分段差异性持续到中泥盆世末期。推测与来自阿尔金方向的压扭应力自东向西逐渐递减有关,同时形成了塔中隆起东敛西散的构造形态。 By using the balanced profile technique, the spatial and temporal differences of Paleozoic tectonic evolution in the eastern and western segments of the Tazhong uplift are discussed. The results show that the central and western parts of the Early Ordovician pull stretch and sink in the extensional setting, while the uplifted rudiments have emerged in the middle part of the tower. Middle Ordovician - Late Ordovician, Tazhong uplift tectonic configuration basic stereotypes, the eastern section of structural deformation and uplift intensity higher than the western section. The weakness of the eastern part of the area and the weak of the west part of the area continued to the end of the Middle Devonian. It is speculated that the compressive-torsional stress from the direction of Altun is gradually decreasing from east to west, meanwhile, the tectonic form of East Convergence Xisan in the Tazhong uplift is formed.
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