volcanics

volcanics mainly growth gas pocket, primary rift and secondary rift, the secondary porosity of clastic rocks is much more developed.

火山岩储层主要发育气孔、原生裂缝、次生裂缝；碎屑岩则以次生孔隙为主。

The volcanics are most commonly andesitic in composition.

火山岩的组成最通常是安山岩.

Basic characteristics of tectonics in the Qilian Mountains and its neighbourings ── on genetic environments of Early Paleozoic marine volcanics another generation to carry on the Stewart name.

祁连山及其邻区大地构造基本特征&兼论早古生代海相火山岩的成因环境这是承继Stewart家族香火的新一代。

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.

Studies show that bimodal volcanics constitute the most favorable host rock association for volcanogenic massive sulfide deposits.

整理结果表明，双峰式火山岩是火山成因块状硫化物矿床的最佳含矿岩石组合；

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.

K-Ar dating of the Cenozoic volcanics from East China and their petrochemistry indi-cate that early Tertiary volcanism is represented mainly by the eruptions of tholeiitic and calc-alkaline magmas.

中国东部新生代火山岩K-Ar年龄与岩石化学研究表明，早第三纪（40&55Ma）均为拉斑与钙-碱性岩浆喷发，代表了弧后引张环境。

The Palaeoproterozoic Erdaowa Group distributed in the north Hohhot, Nei Mongol is composed of metamorphic detrital sediment and carbonate with intermidiate basic volcanics.

出露于内蒙古呼和浩特北部的二道洼群，为一套陆源碎屑岩碳酸盐岩夹中基性火山岩变质建造。

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.

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.

It discusses the temporal and spatial distribution, plate tectonic setting and genetic mechanism of the volcanoes and volcanics, and also the recent research of Somma-Vesuvius volcano.

其中包括火山及火山岩的时空分布规律、构造环境及成因机理和索马-维苏威火山的研究现状；

A LA-ICP-MS chronological study of basic volcanics in Baiyin orefield, Gansu, China

甘肃白银矿田基性火山岩的LA-ICP-MS同位素年代学

The geochemical characters mentioned-above indicate that potassic volcanics in study areas should be drived from enriched mantle sources.

上述特征表明这些火山岩来源于富集的地幔源区。

The volcanicity times are summarized, it provided basis for researching basin evolution, hydrocarbon generation, migration and accumulation. The volcanics fractured reservoir with a fair scale is discovered.

总结了该区火山岩活动期次，为盆地演化、油气生成、运移、聚集的研究提供了依据，并发现一定规模的火山岩裂缝油藏；

The basic end-member of the bimodal volcanics can be divided to alkaline and sub-alkaline series, and the sub alkaline series can be subdivided to calc-alkaline and tholeiitic series.

基性端员属碱性系列和亚碱性系列，亚碱性系列又可分为钙碱性系列和拉斑玄武岩系列。

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.

Its contents are similar to those of EM ⅰ OIB from the Gough islands, and show ocean island alkaline basalt characteristics including the discriminant diagrams of tectonic settings for volcanics, which implies that the Hercynian volcanics were formed in tectonic environment of ocean island.

以其不相容元素比值，相当于Gough岛EMⅠOIB型洋岛玄武岩，其构造环境判别图进一步印证了海西期火山岩形成于洋岛碱性玄武岩环境。

With the evaluating result of single well, the plane classified chart of volcanics reservoir is drawn, the beneficial distributing area of reservoir is discriminated and distribution rule of each type of volcanics reservoir is revealed.

基于单井评价结果，绘制火山岩储层平面分级图，判别有利的储层分布区，揭示示各类储层分布规律。

firstly, the volcanics and shaly sand were separated with fmi static images and conventional logging data.

首先利用FMI静态图像和常规测井曲线将砂泥岩与火山岩区分开来；

Early Cretaceous Andean type arc volcanics in SE Xizang, China

藏东南地区早白垩世的安第斯型弧火

Petrochemical study suggests the volcanics are of calc alkalic to high potassium calc alkalic suite;

岩石化学研究表明属钙碱&高钾钙碱系列；

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.

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.

The volcanics are commonly andesitic in composition, but basaltic and rhyolitic volcanics are abundant in some areas.

火山岩的组成通常是安山岩，但在某些地区玄武岩质和流纹岩质也很丰富。