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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Convergence rates along the Himalayan Frontal Thrust inferred from terraces at Chandidevi Temple Hill, Hardwar, Northwestern Himalaya
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Convergence rates along the Himalayan Frontal Thrust inferred from terraces at Chandidevi Temple Hill, Hardwar, Northwestern Himalaya

机译：从喜马拉雅西北部Hardwar的Chandidevi寺山的梯田推算出的喜马拉雅山顶推力收敛速度

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摘要

Four Ganga river terraces have been recognized in the Chandidevi Temple Hill in the pilgrim town of Hardwar, in the eastern part of the Dehradun Valley, Northwestern Himalaya, India. These terraces that are close to the Himalayan Frontal Thrust have been formed due to movements along this thrust. Dating of the sediments underlying the upper three terraces gives overall uplift, slip and convergence rates of 6.23 ± 1.29 mm/yr, 12.46 ± 2.58 mm/yr and 10.79 ± 2.23 mm/yr respectively. These rates are similar to those reported from the western part of the valley and are significantly less than those published from Eastern Nepal Himalaya. Differences in results are considered to be due to high rates of convergence and maintenance of the highest relief in the Himalaya, resulting in high sediment loads of rivers in the Nepal Himalaya and high rates of subsidence and narrow width of the adjoining Gangetic Plains. The reverse is true of the NW Himalaya and these differences are considered to be due to thesegmented nature of the Himalaya and the adjoining Gangetic Plains. Also, rates of uplift caused by movements along a thrust in a particular cycle of activity decrease with time.
机译：在印度喜马拉雅西北部Dehradun谷东部的朝圣小镇Hardwar的Chandidevi寺山中，已经确认了四个Ganga河阶地。这些靠近喜马拉雅前冲断层的阶地是由于沿该冲断运动而形成的。上部三个阶地下面的沉积物的年代分别使总体上升，滑移和收敛速率分别为6.23±1.29 mm / yr，12.46±2.58 mm / yr和10.79±2.23 mm / yr。这些比率与山谷西部报道的比率相似，但远低于尼泊尔东部喜马拉雅山脉公布的比率。结果的差异被认为是由于喜马拉雅山的最高收敛速度和较高的维持率，导致了尼泊尔喜马拉雅山河流的高泥沙量以及高沉降率和毗邻的恒河平原的狭窄。喜马拉雅山西北部的情况则相反，这些差异被认为是由于喜马拉雅山和毗邻的恒河平原的隆升性质。而且，在特定的活动周期中，沿着推力运动所引起的抬升率会随着时间而降低。

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