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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Nature of flow patterns of Rajahmundry lava, Gowripatnam area, West Godavari, India: Insights from AMS studies
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Nature of flow patterns of Rajahmundry lava, Gowripatnam area, West Godavari, India: Insights from AMS studies

机译：Rajahmundry熔岩的流质，Gowripatnam地区，西罗瓦里，印度：来自AMS研究的见解

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摘要

Anisotropy of magnetic susceptibility (AMS) data for a single basaltic lava flow, herein named the Gowripatnam lava flow from the Rajahmundry Traps, are evaluated for determining precisely the mechanism of lava flow. At Rajahmundry, lava flows are found on both banks of the Godavari River and sandwich inter-trappean sedimentary layers in between. The ones on the west bank of the river are studied here. This study has an implication as the mechanism of lava flow or nature of lava flow patterns of Rajamundry Trap basalt is still a debatable issue. AMS directions is a powerful tool for investigating the source and direction of lava. Its application to single lava flow from Rajahmundry indicates maximum direction of susceptibility axes in almost all possible directions, indicating radial flowage from radial vent source(s). Two AMS directions (towards north-west -14%, and north -7%), however, have the maximum number of petals. This indicates that at least there were palaeo-flowage patterns towards these directions. Incidentally the Godavari lineament strikes NW-SE and the flow dip is due south. However, the two dominant magnetic lineation directions are due north. Hence, the possibility of the earlier suggested river piracy model for lava flow can be ruled out. The fissure eruption near Rajahmundry is pointed out as the then prevailing lava flow mechanism. This is further supported by an overall random distribution of maximum susceptibility axes apart from two dominant flow directions.
机译：磁化率的各向异性（AMS）用于单一玄武岩熔岩流的数据，这里被评为从Rajahmundry陷阱的Gowripatnam熔岩流量被评估，以确定熔岩流动的机制。在Rajahmundry，浪漫流动位于罗阿维河两岸的银行，介于两者之间的三明治间。这里研究了西岸的河岸。本研究有所内容，因为拉贾崎陷阱玄武岩熔岩流动模式的熔岩流或性质仍然是一个可贬值的问题。 AMS方向是一种强大的工具，用于调查熔岩的来源和方向。它在Rajahmundry的单一熔岩流中的应用表明了几乎所有可能的方向上的敏感性轴的最大方向，表示径向通气源的径向流量。然而，两个AMS指示（向西北-14％，北-7％）有最大数量的花瓣。这表明至少有普拉诺流动模式朝向这些方向。顺便提一下，戈达瓦里谱系罢工NW-SE，流量垂度到南部。然而，两个主导的磁性线eationions是北方的。因此，可以排除早期建议的河流盗版模型的可能性。 Rajahmundry附近的裂缝爆发被指出，然后是当时的旱地熔岩流动机制。这是通过除两个主要流动方向之外的最大敏感性轴的总体随机分布进一步支持。

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