Soft‐sediment deformation (SSD) structures are the syn‐sedimentary structures that can form by seismic as well as non‐seismic processes. The SSD structures commonly occur in the Semri Group of the Vindhyan Supergroup in the Kajrahat Limestone, Chopan Porcellanite and Rohtas Limestone formations, and the Glauconitic Sandstone Member. The SSD structures include, slump folds, kink bands, chevron folds, convolute beddings, contorted cross‐beds, flame structures, pinch‐and‐swell structures, breccias, sagging structures, water‐escape structures, and dykes of varying dimensions. The lagoonal and tidal depositional environments of the Kajarahat Limestone Formation (not the continental slope environment) lead to suggest that the SSD structures formed as a result of the seismic activities in them. The SSD structures of the Chopan Porcellanite Formation associated with rhyolite might have originated as a result of volcanic activities or seismicity, while those occurring in the Glauconitic Sandstone Member (Kheinjua Formation) adjacent to the Son Lineament might have formed as a tectonics‐related seismicity. The convolute bedding with large lateral extent in the Rohtas Limestone Formation looks related to seismicity in the light of its deposition along the shelf. Thus, the upper Palaeo‐Mesoproterozoic Semri Group, Vindhyan Supergroup represents varieties of the SSD structures formed mostly by seismic processes. These imply that the Central India was unstable and was a place for tectonically controlled seismic events during the upper Palaeo‐Mesoproterozoic (1,700–1,600 Ma).

中文翻译：

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印度中部Vindhyan超群古上中元古代Semri组软沉积变形结构的地震成因

软沉积变形（SSD）结构是可以通过地震过程和非地震过程形成的同沉积结构。SSD的结构通常出现在Kajrahat石灰岩，Chopan钙钛矿和Rohtas石灰岩地层的Vindhyan超群的Semri组中，以及青釉质砂岩中。SSD结构包括坍落度褶皱，扭结带，人字形褶皱，回旋状被褥，扭曲的交叉床，火焰结构，夹压膨胀结构，角砾岩，下垂结构，泄水结构和尺寸不同的堤坝。Kajarahat石灰岩组的泻湖和潮汐沉积环境（不是大陆斜坡环境）表明，SSD结构是由于其中的地震活动而形成的。与流纹岩相关的Chopan镁橄榄石地层的SSD结构可能是由于火山活动或地震活动而产生的，而与Son Lineament相邻的青花岗砂岩段（Kheinjua地层）中发生的SSD构造可能是与构造有关的地震活动。Rohtas石灰岩地层中具有较大横向范围的回旋地层从其沿陆架的沉积角度看与地震活动有关。因此，上古古生界Semri组，Vindhyan超群代表了主要由地震过程形成的SSD结构的变体。这意味着印度中部是不稳定的，并且是上古中元古代（1,700–1,600 Ma）期间构造控制地震事件的场所。