| 试论构造因素对泌阳断陷陆相层序形成的影响机制 |
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| 引用本文： | 胡受权.试论构造因素对泌阳断陷陆相层序形成的影响机制[J].大地构造与成矿学,1997,21(4):315-322. |
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| 作者姓名： | 胡受权 |
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| 作者单位： | 西南石油学院博士后流动站 |
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| 摘 要： | 构造作用是控制泌阳断陷湖盆陆相层序发育的关键性因素，它制约着低频层序（盆地充填序列、构造层序、层序组及层序）的发生、发展与形成。区域性构造运动控制着盆地充填序列及构造层序；盆地边界断裂的脉动性控制着层序组及层序。在陆相断陷湖盆中，盆地基底构造沉降是非线性或间断函数；由盆缘控盆边界断裂向盆地中心，沉降速率逐渐减小，呈“反铰链式”沉降。在从假定湖平面变化呈一正弦函数曲线、物源供给速率中等且匀速的条件下，采用计算机分别模拟了加速沉降和减速沉降两种过程的陆相层序响应特征。研究结果表明，一个构造沉降旋回过程控制着一个陆相层序及其体系域的发育和形成。
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| 关 键 词： | 构造因素 构造旋回曲线 “反铰链式”沉降 低频层序 陆相层序 层序地层模拟 |
DISCUSSION ABOUT INFLUENCING MECHANISM OF STRUCTURE FACTOR ON THE FORMATION OF TERRIGENOUS SEQUENCE IN BIYANG FAULT-DEPRESSION |
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| Abstract: | Tectonic event which is a key factor to control terrigenous sequence developmentbrought about the formation and evolution of low frequency sequence (including basin-fillsequence, tectonic sequence, sequence sets and sequence)in Biyang fault-depressed lacustrinebasin. Regional tectonism caused the formation of basin-fill sequence and tectonic sequenceand pulsation of basin boundary faults led to the evolution of sequence sets/sequence. Interrigenours fault-depressed lacuserine basin, the tectonic descent of basement presented anonlinear or disconnected function, and the descent rate gradually decreased from thebasinmargin where the boundary fault to control basin was developed to the basin-ceter, namelyanti-hinge-typed subsidence. The responsed charateristics of terrigenous sequence with theprocedure of accelerated/decelerated structural subsidence has respectively been simulatedbased on the hypothetical condition that lacustrine level change presents a sinusoid curve,and recharge of land-source fragmental material is in middle and uniform velocity. Theresearch result in this paper shows that a cycle of structure subsidence corresponds withtheformation of a terrigenous sequence and its system tract. |
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| Keywords: | structure factor structure cycle curve anti-hinge-typed subsidence low frequency sequence terrigenous sequence sequence stratigraphy simulation |
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