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通过岩心观察在蒙古国南贝尔凹陷发现大量泥质软沉积变形构造,个体构造形态可分为眼状、螯状、拖曳状和波状4种类型;组合构造形态可分为阶梯状、叠瓦状、梅花状、地堑式、地垒式和定向排列6种类型。通过与震积岩的特征类比和对地震作用特征分析可知,蒙古国南贝尔凹陷白垩系形态多样的泥质软沉积变形构造是地震作用的产物,其垂向序列自下而上为地震活动衰减期形成的地垒式组合构造和波状构造单元、地震活动停滞期形成的地堑式组合构造和阶梯状组合构造单元及波浪作用形成的泥质软沉积变形构造(组合)准原地沉积单元(包括眼状、螯状构造和叠瓦状、梅花状、定向排列等组合构造)。这些泥质软沉积变形构造主要分布在白垩系下宗巴音组,说明这一时期是控盆边界断裂和盆内主要断裂(如中央断裂)活动相对强烈的时期。
Through the core observation, a large amount of muddy soft sedimentary deformation structures were found in the South Bell Depression of Mongolia. The individual structures can be divided into four types: eye-shaped, chelate-shaped, towed and undulated. The combined structural forms can be divided into stair-like and shingled , Plum-shaped, graben, basement and directional arrangement of six types. Based on the feature analogies with seismites and the characterization of seismicity, we can see that the cretaceous soft sedimentary deformation structure of Cretaceous in South Beier Sag of Mongolia is the product of earthquake action. The vertical sequence is the seismic activity decay The formation of the barrier-type combination of structural and wavy structural units, the formation of seismic activity stagnant graben assemblage and ladder-like combination of structural units and the formation of the wave action of muddy soft sedimentary deformation (combination) quasi-original deposition unit ( Including the eye, chelate-like structure and shingles, plum-shaped, directional arrangement and other combination of structure). These muddy soft sedimentary deformation structures are mainly distributed in the Lower Cretaceous Zongba sound group, indicating that this period is a period during which the boundary between the controlled basin and the main faults in the basin such as the central fault have a relatively strong activity.