酸性熔岩

熔体结构与酸性熔岩的某些特征

The Melt Structure and Some Characteristics of Acidic Lava

但关于珍珠岩矿床的成因，习惯认为：珍珠岩是由火山口喷发的酸性熔岩，经急速冷却而成的玻璃质岩石。

With regard to the genesis of perlite deposits , it is considered conventionally that " perlite is a glassy rock which is formed by rapid cooling of the acidic lava erupted from volcanic crater " .

汪903、升深4井为酸性熔岩；

Wang 903 、 4 well presented acid lava ;

酸性熔岩的塑性流变

Plastic flowage deformation of acid lavas

熔岩相以玄武质熔岩为主，在火山口附近有少量酸性熔岩。

The lava facies is dominated by basaltic lava , with minor acid lava near the vent .

该火山岩系主要由玄武质熔岩组成，其次还包含有中性和酸性熔岩及火山碎屑岩。

The volcanic successions consist predominantly of basaltic lavas with subordinate intermediate and acid lavas and pyroclastic rocks .

本区可能存在的中酸性熔岩海山是长英质轻碎屑物质的主要源区。

The intermediate and acid seamount which maybe exist , may be the main origin of felsic detritus .

基性、中性、酸性熔岩和火山碎屑岩均有，以拉斑玄武岩、钙碱性火山岩和碱性火山岩系列为主，极少量过碱性火山岩。

The basic , intermediate , acidic lava-and associated volcaniclastic rock are of widespread occurence , which are dominanted by tholeiite , alkali-lime and alkaline volcanic series , and some ultra-alkaline volcanic rock .

中酸性火山熔岩或次火山岩；

2 , intermediate - acid volcanic rock or subvolcanic rock ;

它标志着酸性火山熔岩在特定的古地理环境下所形成的原生构造的特殊性。

It shows that acidic volcanic lava has a specific characteristic of the primary structure in the specific paleogeographic environment .

沸石矿的生成与酸性火山熔岩及酸性火山碎屑熔岩有关。

The for - mation of zeolite has a connection with the acid volcanic lava and the acid volcanic clastic lava .

结果认为，白垩纪火山岩以中酸性火山熔岩和火山碎屑岩为主，局部发育基性熔岩；

The study shows that Cretaceous volcanics mainly consist of medium acidic volcanic lava and volcanoclastic rocks , with locally developed basic lava ;

大庆深层火成岩层段岩性复杂，不仅具有从基性到酸性的各种熔岩，还包括不同喷发期次的凝灰岩。

The lithology of igneous rocks of Daqing area is so complicated that not only basic to acidic lavas were drilled , but also tuffs erupted in different times .

火山岩是一套中-酸性凝灰岩及熔岩，其元素地球化学特征类似于活动大陆边缘或弧火山岩；

The volcanic rocks consist of a suite of intermediate to siliceous tuff and lava , its geochemistry indicates that it is similar to active continental marginal or arc volcanic rocks .