volcanics

Rock fragments, including volcanics, are common, and the matrix consists largely of kaolin and illite.

常见有岩石碎块, 包括火山岩屑, 基质大部分为高龄土和伊利石.

The volcanics are most commonly andesitic in composition.

火山岩的组成最通常是安山岩.

ReHeTai oil field has many oil-bearing strata, among them the volcanics is one the important reservoir.

热河台油田具有多套含油层系, 其中火山岩也是热河台油田的重要储层之一.

Gold deposits in the Pingxiang area are controlled by faults and hosted in acid volcanics.

凭祥地区金矿床受断层构造与酸性火山岩的双重控制.

Marine volcanics of Early Ordovician was found in Zhifang region.

摘要纸房地区具有早奥陶世海相火山岩存在.

Its petrochemical characteristics show that the volcanics was formed in oceanic island tectonic environment.

岩石化学特征表明火山岩形成于洋岛构造环境.

Granite greenstone-hosted , meta-clastics-hosted , volcanics-subvolcanics hosted and sedimentary rock-hosted micro-disseminated gold deposits are of industrial value.

具有工业价值的金矿类型以花岗岩 - 绿岩型、变碎屑岩型 、 微细 浸染型 、 火山-次火山岩型为主.

The subdivision has both scientific and practical significance on studying volcanics, geological structures and minerals.

火山岩分区的划分对火山岩 、 地质构造和矿产的研究具有重要的意义和实用价值.