【摘要】 中扬子台地南缘是台地斜坡分布地带,水介质较深,均为深水沉积,特征明显。斜坡上重力沉积发育,尤以滑塌沉积最为突出。滑塌沉积有整体块状滑移体、碎裂砾质滑移体和部分碎裂砾质滑移体。滑塌构造明显,沉积序列具旋回结构。纵向分布规律为:在陡山沱期,滑塌沉积多集中在陡山沱组第二段和第三段的下部;在灯影期,滑塌沉积均分布在灯影组的第一段中,平面上呈近东西向带状展布,反映出台地斜坡的展布规律,滑塌构造和滑塌变形等特征,表明其斜坡倾向于南或南偏东方向,滑塌角砾岩中具有良好的油、气储集空间。更多还原

【Abstract】 The south margin of Central Yangtze Platform is a slope zone of platform margin, dominated by deep-water deposits. In this area, the gravity deposits, especially, the slump deposits are well developed. The slump deposits include the slumpy slide blocks, cracked and partially cracked conglomeratic slide blocks. The studied strata are characteristic of slump sedimentary structures and the depositional sequences are cyclic. The vertical distribution of slump deposits is common. During the Dou Shah Tuo period, the slump deposits mostly occured in the lower part of the second and third member of the Dou Shan Tuo formation, whereas during the Deng Ying period they occurred in the first member of the Deng Ying formation. The slump deposits distribute along the zone, following nearly a W-E trend and reflecting the distribution of platform margin slope. The features of slump structures and slump deformation show that the slope dips in S or SE direction. The slump breccias may contain well developed reservoir space for oil and gas.更多还原