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在柴达木盆地西部红沟子的侏罗系中发育了一种特殊的软沉积变形构造,与类双重构造和双曲构造有些相似,但又明显不同,除了叠片外,还有软变形褶皱及微型断层,这三者构成了滑叠构造的主体,我们把这种构造称之为“滑叠构造”。滑叠构造的主体是叠片,多呈直片状,少数呈“Z”形,有的尾部发育了燕尾构造或变形结。叠片的平均倾向301.2°,平均倾角54.71°。滑叠构造与软斜歪变形褶皱、砂岩岩脉、包卷层理等十余种软沉积变形构造一道产出。滑叠构造产在一套河道细砾岩、河道间炭质泥岩(页岩)、浅水三角洲砂泥岩、浅湖钙质泥岩、滑积岩和浊积岩序列中,其底部为棕红色的浅湖钙质泥岩和炭质泥岩,顶部为滑积岩,其成因密切与滑动牵引有关。结合其它共生、伴生构造认为滑叠构造是由地震引起的三角洲前缘半固结性沉积物沿滨浅湖沉积底层强力滑动牵引形成。滑叠构造的产状经过校正后平均倾向358°,倾角48°,指示滑动方向是自北向南,与目前阿尔金山的位置关系很匹配,也说明了侏罗纪时阿尔金山(可能是古隆起)就已经存在了。阿尔金山的造山作用在持续加强,并常常伴随地震作用,是滑叠构造形成的主要诱发因素。
A special soft-sedimentary deformation structure is developed in the Jurassic of the Honggouzi area in western Qaidam Basin. It is somewhat similar to the double-structure and double-curvature structures of the Qaidam Basin but distinctly different. In addition to the laminations, there are also soft deformation folds And micro-faults, all of which constitute the main body of the sliding structure, we call this structure “sliding structure ”. Sliding structure of the main body is laminated, mostly straight sheet, a few were “Z ” shape, and some developed tail dovetail deformation or deformation knot. The average orientation of the lamination was 301.2 ° with an average inclination of 54.71 °. The slip-slip structure is produced in combination with more than ten kinds of soft-sedimentary deformation structures such as soft oblique crooked deformation folds, sandstone dikes and reeling layers. In a sequence of fluvial conglomerates, inter-fluvial clay shale (shale), shallow delta sands and shales, shallow lacustrine calcareous mudstones, syn-syncrites and turbidites, the bottom of the slip stack is light brownish red Lake calcareous mudstone and carbonaceous mudstone, with the top of the syndezones. Its origin is closely related to sliding traction. In combination with other symbiosis and associated structures, the slip tectonics is thought to be caused by the strong sliding of the delta front semi-consolidated sediments along the shallow and shallow lake sediments caused by the earthquake. The slip-tectonic structure has a corrected average propensity of 358 ° and a dip angle of 48 °, indicating that the slip direction is from north to south and is well aligned with the current Altunian position and also suggests that the Jurassic Altun (probably paleohigh) Already exists. The orogenic activity of the Altun Mountains is continuously strengthened and often accompanied by the earthquake, which is the major inducing factor for the formation of the slip tectonics.