石炭系火山岩主要是流纹岩-英安岩-安山岩建造,它们产出于海陆过渡相-陆相环境,属于地壳成分。
赋矿围岩为塔木兰沟组粗面安山质岩石,主要矿体为沿着NWW方向断裂构造就位的石英脉体。
莺山断陷侏罗系火山岩主要为安山岩、玄武岩、英安岩、火山角砾岩及凝灰岩。
喷出岩单元不仅仅由玄武岩组成,还包括安山岩、玻安岩、钠长岩以及角砾岩、凝灰岩等。
其原岩可能为玄武安山岩-安山岩-英安岩-流纹岩组合。
火成岩产生于火山喷发和在地表或接近地表的地方凝固;流纹岩或安山岩或玄武岩的。
台湾北部的火山群,包括大屯山、七星山、观音山,其组成结构就是以安山岩为主。
1·The volcanic rocks in the study area all belong to sub alkaline series including olivine basalt, andesite and dacite, from basic to intermediate, and to acid.
研究区内火山岩从基性—中性—中酸性都有出露,包括橄榄玄武岩、安山岩和英安岩,且都属于非碱性系列。
2·The (examination) of the petrography shows that the volcanic terrains in Tengchong are typical of the basalt - (andesite) - (dacite) arc volcanic rock associations of the calc-alkaline series.
岩相学特征表明,该火山群为典型的钙碱性系列玄武岩安山岩英安岩弧火山岩组合。
3·The pyroclastic rock fragments comprise quartzite, schist, gneiss, basalt, andesite, rhyolite and quartz.
火成岩的碎块成分主要为石英岩、片岩、片麻岩、玄武岩、安山岩和流纹岩。
4·Mainly is basalt and tuff, secondly become for the alteration basalt and andesite.
主要为玄武岩和凝灰岩,其次为蚀变玄武岩和安山岩。
5·Saint Helens seemed at the time of the 1980 eruption, it was actually a relatively small eruption compared to other Andesite volcanoes such as Mt.
圣海伦斯似乎在当时的1980年喷发,它实际上是一个相对小的喷发较之其他安山岩火山如山。