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A reappraisal of the Jharol Formation in the context of stratigraphy of Aravalli Supergroup, Rajasthan, India
Journal of Earth System Science ( IF 1.3 ) Pub Date : 2020-07-08 , DOI: 10.1007/s12040-020-01415-y
H N Bhattacharya , Amrita Mukherjee

The enormously thick sedimentary succession exposed between Rishabhdev Lineament and rocks of the Delhi Supergroup constitutes Jharol Formation of the Aravalli Supergroup in Udaipur region of Rajasthan. The whole sedimentary succession is named Jharol Formation and designated as deep water turbidites. A detailed field examination indicates presence of two distinctly different litho successions juxtaposed across a crustal level fault along which brecciated ultramafics are tectonically emplaced. The sedimentary successions exposed immediate west of the Rishabhdev Lineament are deep water sediments with distinct facies types characterizing inner to outer lobe stacked turbidites. These turbidites are similar to the turbidites of the Udaipur Formation and Tidi Formation exposed east of the Rishabhdev Lineament. However, the sedimentary succession exposed west of these deep water sediments across the aforesaid fault contains facies types that represent continental to shallow marine deposits. This basin marginal sediments continue up to the contact with rocks of the Delhi Supergroup. Such litho-association suggests that a separate formation status of the sediments lying west of the Rishabhdev Lineament should be dropped and the turbidites of the Udaipur Formation should be considered as the youngest formation of the Aravalli Supergroup.

中文翻译:

在印度拉贾斯坦邦Aravalli超群地层学背景下对Jharol地层的重新评估

里沙卜德杰夫Lineament和德里超群岩石之间露出的极其厚厚的沉积层序构成了拉贾斯坦邦乌代浦地区Aravalli超群的Jharol组。整个沉积演替过程被称为Jharol组,并被称为深水浊度。详细的现场检查表明,在地壳水平断层上并置着两个截然不同的岩相演替体,沿其构造构造了角砾状的超基性岩体。在利沙布杰夫线西缘附近暴露的沉积层序是深水沉积物,具有不同的相类型,其特征是内叶到外叶堆叠的浊质。这些浊度类似于在利沙布杰夫线阵以东暴露的Udaipur组和Tidi组的浊度。然而,在上述断层中,这些深水沉积物以西露出的沉积层序包含了从大陆到浅海沉积物的相类型。该盆地边缘沉积物一直持续到与德里超群的岩石接触为止。这种岩石学联系表明,应该放弃位于里沙卜德杰夫台风西部以西的沉积物的单独形成状态,应将乌代浦组的浊度视为阿拉瓦利超群的最年轻的组。
更新日期:2020-07-08
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