里德尔剪切的组合型式与走滑盆地组合型式的相似性

发布时间：2018-05-28 23:15

本文选题：里德尔剪切 + 走滑盆地　；参考：《地质论评》2017年02期

【摘要】：走滑断裂体系中经常发育里德尔剪切的断裂组合,世界上不同构造背景下与走滑断裂相关的盆地(走滑盆地)也很多见。因此里德尔剪切是地质构造研究中的重要方面。我们从三个方面对里德尔剪切的节理构造组合及盆地组合进行了对比:(1)里德尔剪切构造组合与比例尺无关。里德尔剪切带的(转换)拉张区与沉积盆地的分布区是相似的;(2)断裂的最大位移区与断陷盆地的沉积中心是一致的,断陷盆地长轴平行于断裂走向;(3)物理模拟试验及数学模拟试验都证实了走滑盆地的演化。基于上述认识,我们通过厘米级岩芯标本的观察,结合已发表的盆地资料,提出了6类与里德尔剪切有关的构造组合及断陷盆地组合。(1)雁列状构造及盆地组合:许多盆地发育雁列状构造。同时,与里德尔剪切相关的雁列状盆地的宽度与主剪切断裂的剪切位移呈正相关。(2)帚状或马尾状构造及盆地组合:二者在形态上相似,所以归为一类。成因上,马尾状构造及盆地主要发育在走滑断裂的拉张端部,而帚状构造或盆地反映走滑断裂的旋扭作用,可以在走滑断裂影响区域的任何部位。(3)串珠状构造及盆地组合:该类型的盆地主要是指释压盆地的组合,拉分盆地也可以形成串珠状盆地。(4)S状或Z状构造或盆地组合:左行走滑形成Z状构造或盆地,而右行走划形成S状构造或盆地。(5)多字型构造及盆地组合:是拉分盆地的典型组合,可以过渡到串珠状盆地。(6)复杂的网状构造及盆地组合:通常是由于分布型简单剪切的作用结果。以上盆地组合类型包括大型盆地内次级单元(次级盆地或更次级盆地)的组合,但不包括多成因、多期活动的构造及盆地。
[Abstract]:The fault assemblages of Rydell shear are often developed in strike-slip fault systems, and there are many basins (strike-slip basins) related to strike-slip faults in different tectonic settings in the world. Therefore, Rydell shear is an important aspect in the study of geological structure. We have contrasted the joint structural assemblages and basin assemblages of Rydell shear from three aspects: 1) the Rydell shear tectonic assemblage is not scale independent. The maximum displacement of the (transition) extensional zone of the Rydell shear zone and the distribution area of the sedimentary basin is similar to that of the Guanzao 2) fault, and the maximum displacement area of the fault is consistent with the sedimentary center of the faulted basin. The evolution of the strike-slip basin is confirmed by physical simulation tests and mathematical simulation tests of the long axis parallel to the fault strike. Based on the above understanding, we use the observation of centimeter core specimens, combined with published basin data, Six types of structural assemblages related to Riedel shear and faulted basin assemblages. At the same time, the width of the Yanriform basin associated with Riedel shear is positively correlated with the shear displacement of the main shear fault. In origin, the Mawei structure and basin are mainly developed at the extension end of the strike-slip fault, while the broomlike structure or basin reflects the spin-torsion of the strike-slip fault. Beaded structures and basin assemblages can be found in any part of the zone affected by strike-slip faults: this type of basin mainly refers to the combination of pressure relief basins, The pull-apart basin may also form a series of beaded basins or Z-shaped structures or basin assemblages: left strike-slip to form Z-shaped structures or basins, On the other hand, the right-hand strike-striding formed S-shaped structure or basin. 5) Multi-glyph structure and basin assemblage: it is a typical assemblage of pull-apart basins. Complex reticular structures and basin assemblages: usually as a result of distributed simple shear. The above types of basin assemblages include the assemblages of subunits (secondary basins or subbasins) in large basins, but do not include polygenesis, multi-stage active structures and basins.
【作者单位】：墨西哥国立自治大学地球科学中心;中国地质科学院地质力学研究所;中国石油大学(北京)地球科学学院;
【基金】：墨西哥自然基金资助项目(编号:08967) 中国石油化工股份有限公司石油勘探开发研究院项目(编号:GSYKY-B09-32)的成果~~
【分类号】：P542

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