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A study on textural characteristics,heavy mineral distribution and grain-microtextures of recent sediment in the coastal area between the Sarada and Gosthani rivers,east coast of India

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International Journal of Sediment Research 2020年第5期35卷 484-503页

作者： Ali Mohammad Parvathaneni Bhanu Murthy Edupuganti Naga Dhanamjaya Rao Hari Prasad Department of Geology Andhra University

The current study aimed to describe textural characteristics,heavy mineral composition,and grain microtextures of the sediment from three micro-environments(foreshore,berm,and dune).A total of forty-one(41) representative surficial sediment samples have been collected from fifteen(15) locations along the beach area between the Sarada and Gosthani rivers on the east coast of India,where the length of the stretch is more than 100 *** study reveals that most of the coastal sediment is medium to fine sand with relatively high ratios of coarse sand at Yarada beach,and the nature of the sediment is moderately to well *** characteristics indicate a high energy *** heavy mineral analysis of the sediment in the current study was done for coarse(+60#) and fine(+230#) size *** the weight percentage(WT%) reveals that a high percentage of heavy minerals is associated with fine ***,sillimanite,garnet,zircon,and rutile are the major heavy minerals identified in the current *** concentrations of these heavy minerals show great variations from south to north of the study *** an economic point of view,a considerable amount of heavy minerals(average 48.41%) are present on both sides(north and south) of the Gosthani River *** the Sarada Estuary,the concentration of the economic heavy minerals was found under the minimum economic *** grain microtextures of the major heavy minerals from the different locations along the study area demonstrate the variation in grain microtextures,which is controlled by the chemical and mechanical *** microtextures reflect moderate to high wave energy on the beach area,in addition to high mechanical impact on the grains from the estuary point.

关键词： Textural characteristics Heavy minerals grain microtexture Coastal sediment Visakhapatnam Coast

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