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首页> 外文期刊>Chinese science bulletin >Late Tertiary faults and their paleostress along the boundary between the Kuqa Basin and the Tianshan Mountains
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Late Tertiary faults and their paleostress along the boundary between the Kuqa Basin and the Tianshan Mountains

机译：库车盆地与天山交界处第三纪晚期断裂及其古应力

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摘要

Field investigation shows that the boundary between the Kuqa Basin and the Tianshan Mountains can be divided into two sections with the Vanbulak area as the dividing point. In the western section, the Mesozoic strata overlie unconformably on the Paleozoic rocks. The basin-dipping faults developed in both Mesozoic and Paleozoic rocks. The eastern section is characterized by basin-dipping normal faults separating the Paleozoic strata and Tertiary. The brittle structural analysis was carried out along the basin-range boundary. 360 measurements of striations have been obtained at a total of 25 sites. Paleostress reconstruction indicates that the basin-range boundary was in an exten-sional condition, with some superimposed strike-slip, during the Late Tertiary. The extension could be explained by the vertical block uplift of the Tianshan Mountains.
机译：野外调查表明，以旺布拉地区为分界点，库车盆地与天山之间的边界可分为两段。在西部，中生代地层不整合地覆盖在古生代岩石上。中生代和古生代都发育了盆地倾角断层。东部地区的特征是将古生代地层和第三系分隔的盆地浸润型正断层。沿盆地范围边界进行了脆性结构分析。在总共25个部位获得了360条条纹的测量结果。古应力重建表明，在第三纪晚期，盆地范围边界处于扩张状态，并且有一些叠加的走滑。扩展可以用天山的垂直块状隆升来解释。

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