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1976年9月菲律宾马尼拉南部60km 处的塔阿尔(Taal)火山岩浆蒸气爆发形成了爆发角砾岩筒.在爆发中拍摄了这些角砾岩筒的活动,它们是由一系列小爆发组成,其活动高峰间隔为10秒。四个角砾岩筒均产在塌陷断层上。1965年9月28日发生的一次更为强烈的喷发形成了一条直径为800m,具有明显边缘的火山通道。1977年10月一个角砾岩筒冲破封闭的火山颈再次喷发。在火山碎屑物中有各个蚀变阶段的角砾碎块。这些角砾碎块呈弱结块状至强胶结状、泥化和黄铁矿化乃至完全被硅质和黄铁矿所交代。这些角砾岩与许多矿区所发现的碎屑难以区分。猛烈的初始岩浆蒸气爆发导致岩筒壁强烈破碎。这些破碎带可能成为矿化区(如智利的布雷登)。喷发之后,在
The Taal volcanic magma burst at 60 km south of Manila, the Philippines, in September 1976 formed an efflorescent breccia cylinder in which the activities of these breccia cylinders were shot and consisted of a series of small explosions, Activity peak interval of 10 seconds. All four breccia tubes are produced on the collapsed fault. A more intense eruption on September 28, 1965, formed a volcanic channel with a clear edge at a diameter of 800 meters. In October 1977 a breccia tube burst through a closed volcanic neck erupted again. In volcanic debris there are various alteration stages of brecciated fragments. These brecciated fragments are weakly lumpy to strongly cemented, muddy and pyritized and are even fully accounted for by siliceous and pyrite. These breccias are indistinguishable from those found in many mines. The violent initial magma vapor explosion caused the rock tube wall to crush strongly. These broken belts may become mineralized areas (eg, Breton, Chile). After the eruption, at