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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Sedimentology of a prograding delta complex: The Jurassic succession of the Wagad Uplift in the Kachchh Basin, western India
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Sedimentology of a prograding delta complex: The Jurassic succession of the Wagad Uplift in the Kachchh Basin, western India

机译：促进三角洲复合体的沉积学：印度西部Kachchh盆地Wagad隆起的侏罗纪连续

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摘要

The Wagad Uplift is a region in the eastern part of the Kachchh Basin of western India which exposes Middle to Upper Jurassic sedimentary rocks. The more than 520 m thick succession is dominated by third-order cycles with highstand systems tracts being composed of coarsening-upwards parasequences. The Callovian to Lower Oxfordian succession is dominated by asymmetric couplets of comparatively thick highstand systems tracts and thinner transgressive systems tracts reflecti g a general sea-level rise. The Middle-Upper Oxfordian Kanthkot Ammonite Beds are characterized by condensed, fossiliferous, bioturbated, poorly sorted silt- to sandstones and represent deposits of the maximum fooding zone. While sediment starvation continued in the westernmost Wagad Uplift until mid-Kimmeridgian times, a delta complex prograded into the basin from the east. These strata reflec the flling and continuous shallowing of the basin towards the end of the Jurassic. The sedimentary unit is characterized by stacks of highly asymmetric transgressive-regressive cycles, the transgressive part being represented only by thin lag deposits. Seven facies could be distinguished in the Jurassic sedimentary succession, which refect different energy conditions, water depths, and sedimentation rates.
机译：Wagad Chrexift是西印度Kachchh盆地东部的一个地区，其揭露了中部侏罗纪沉积岩。超过520米的连续继承是由第三阶周期的主导，具有高昂的系统束，由粗化 - 向上的假释组成。 Callovian以降低牛津甸的继承是由相对较厚的高升高系统的不对称对联，较薄的泛型系统暗影反射率造成一般海平面上升。上上部牛津汉卓·am氨型床的特点是浓缩，化纤，生物稳定，对砂岩分类不良，硅灰岩分类，并且代表最大食品区的沉积物。虽然沉积物饥饿在最西方的Wagad隆起中持续到中间 - 以中间 - 以中间的时代，达到从东方的盆地寄进盆地的三角洲复合物。这些Strata反映了河流朝向侏罗纪末端的瓶子和持续的浅浅。沉积单元的特征在于堆叠高度不对称的逐渐回归循环，几乎是由薄的滞后沉积物表示的近似滞后部分。在侏罗纪沉积连续中可以区分七个相，这将不同的能量条件，水深和沉降率进行了分析。

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