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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Occurrence of pseudotachylites in thevicinity of South Almora Thrust zone,Kumaun Lesser Himalaya
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Occurrence of pseudotachylites in thevicinity of South Almora Thrust zone,Kumaun Lesser Himalaya

机译：库玛恩小喜马拉雅山南阿尔莫拉冲断带附近的假速滑石的发生

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摘要

Thin veins of pseudotachylites are observed within theSouth Almora Thrust (SAT) zone of the Almora crystallines, Kumaun Lesser Himalaya. The SAT zonepresents a relatively wide variety of mylonite types.Within this zone thin, dark-coloured veins of pseudotachylites are found. Folded veins of irregular thickness are also observed. The pseudotachylites are formedby rapid crystallization of melts. Intense deformationand friction-related heating is generated during thethrust sheet movement, which is responsible for producing the melts. Small amount of melts generatedduring the frictional heating cool rapidly in association of the wall rock and form thin veins, which havesharp boundaries (or folded) within the wall rock.Quartz, K-feldspar and plagioclase occur as porphyroclasts in the host rocks.
机译：在Kumaun小喜马拉雅山的Almora晶体的South Almora推力（SAT）区内观察到了伪速闪石的细脉。 SAT区域代表了相对广泛的my石类型，在该区域内发现了细的，深色的假速滑石脉。还观察到不规则厚度的折叠静脉。假速滑石通过熔体的快速结晶形成。推力板运动期间会产生剧烈的变形和与摩擦有关的加热，这是产生熔体的原因。摩擦加热过程中产生的少量熔体与围岩结合并迅速冷却并形成细脉，这些脉在围岩内具有锋利的边界（或折叠）。石英，钾长石和斜长石在基质岩中以卟啉体形式存在。

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