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    中国百强科技报刊

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    Volume 29 Issue 5
    Sep.  2004
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    Article Contents
    REN Jian-ye, LU Yong-chao, ZHANG Qing-lin, 2004. Forming Mechanism of Structural Slope-Break and Its Control on Sequence Style in Faulted Basin. Earth Science, 29(5): 596-602.
    Citation: REN Jian-ye, LU Yong-chao, ZHANG Qing-lin, 2004. Forming Mechanism of Structural Slope-Break and Its Control on Sequence Style in Faulted Basin. Earth Science, 29(5): 596-602.

    Forming Mechanism of Structural Slope-Break and Its Control on Sequence Style in Faulted Basin

    • Received Date: 2004-07-12
    • Publish Date: 2004-09-25
    • Faulted basin is a kind of typical tectonic active basin, in which there are various kinds of tectonic slope-breaks controlled by different tectonic backgrounds and mechanisms. Based on the researches on Mesozoic and Cenozoic faulted basinsin eastern China, classification system on structural slope-break of faulted basin is put forward, basic characteristics and forming mechanism of various kinds of structural slope-break have been described in detail and synthetic models of sequence stratigraphic development in continental faulted basin are set up in this paper. Structural slope-break in faulted basin can be divided into fault slope-break, bend slope-break, flexure slope-break and pivotal slope-break. The fault slope-break is controlled by syndepositional faulting within the basin, the formation of the bend slope-break is related to listric geometry of major boundary fault in faulted basin, while the flexure slope-break often results from activity of blind normal fault in the basin basement. Different from above three slope-breaks, the formation of the pivotal slope-break is a result of rotational tilting of hanging wall of normal fault, the development is mainly controlled by main boundary normal fault with steep dip and plane geometry. Development, distribution in space, evolution process and assemblage pattern of structural slope-break determind accommodation and sediment influx system in faulted basin, further it restricts sediment disperse process and distributional pattern of sand bodies in faulted basin. The researches on relationship between structural slope-break and depositional facies will be a great help to illustrate distribution of depositional systems and promote prediction availability of sand bodies in sedimentary basin.

       

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