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为了研究灵山岛的沉积物软变形构造特征,利用野外露头考察、沉积岩石学、地球化学等方法,根据形态学、驱动力、沉积物液化及变形机制等因素进行了深入分析。识别出多种类型沉积物软变形:卷曲变形、液化底辟、负载构造、挤入构造、液化角砾岩、球—枕构造、泄水构造,并详细描述了这些沉积物软变形的表面特征和分布规律。依据各种地质记录,本区构造活动频繁、附近的五莲—烟台断裂于早白垩世是最活跃的时期,认为本文所描述的沉积物软变形是由地震触发引起的。根据不对称负载构造受横向剪切力分析,验证了吕洪波[1]推断早白垩世盆地古斜坡方向SE高NW低的观点。早白垩世巨厚白色凝灰岩可能系本区存在深切至下部岩浆囊的大断层所致,在这个深切过程中诱发一系列地震活动与沉积物的软变形。
In order to study the structural features of soft deformation of sediments in Lingshan Island, the paper made an in-depth analysis by using the methods of field outcrop investigation, sedimentary petrology and geochemistry, according to the morphology, driving force, sediment liquefaction and deformation mechanism. Various types of sediment soft deformations have been identified: curly deformation, liquefaction diapirs, load structure, squeeze structure, liquefaction breccia, ball-pillow structure, drainage structure, and describe in detail the surface features of these deposits soft deformation And distribution. Based on various geological records, the tectonic activities are frequent in this area. The nearby Wulian-Yantai fault was the most active period in the Early Cretaceous, and the soft deformation of the sediments described in this article is caused by the earthquake. According to the analysis of the transverse shear force under the asymmetric load structure, it is verified that Lv Hongbo [1] deduces the viewpoint that the SE of the Early Cretaceous basin was low in SE height NW. Early Cretaceous thick white tuff may be due to the existence of deep faults to the lower magma pockets in this area, during which a series of seismic activities and soft deformation of sediments are induced.