徐州地区冲断褶皱带研究

A PRELIMINARY STUDY ON THE THRUST AND FOLD BELT OF THE XUZHOU REGION

  • 摘要: 通过研究徐州地区构造的几何学特征,指出其构造为一薄皮型式的向北西逆掩的冲断褶皱带。其构造变形具有东西分带和南北分段的特征。东西可分为东部滑脱带、中部锋带和西部外缘带。这种分带性为在区内冲断层和推覆体下找煤指明了方向。锋带紧密的叠互式冲断层和褶皱与震旦系碳酸盐岩地层楔状体沿底部拆离带向北西滑脱有关。冲断褶皱带是在与郯庐断裂活动有关的挤压力和重力的联合作用下,形成于印支-燕山运动早期。

     

    Abstract: The geometric characters of the structure of the Xuzhou region is studied in this paper. And it is put forword that the structure of the reserch area is a NW-verging thrust and fold belt of the thin-skinned tectonics type. There are characters of disparting zones in E-W direction and segments in S-N direction. There are eastern detachment zone, frontal zone and out-edge zone in E-W direction. These characters indicate the ori entation for the coal survey. Formation of close inbricate thrusts and folds of the frontal zone relates to northwestern moving of the wedge terrance of the sinian carbonatite stratum along a sole datachment zone. The Xuzhou thrust and fold belt were formed by associated effect of compressive stress and gravity related to the action of the Tanchen-Lujiang fault zone during the Indo-China and Early Yanshanian Movements.

     

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