查询词典 volcanics

This study shows that there are 4 kinds of volcanic facies in deep volcanics in north Songliao Basin: eruptive facies, overflow facies, volcanic vent facies and volcanic sedimentary facies. There are 4 volcanic eruption cycles: Huoshiling period, Shahezi period, Yingchengzi period and Quantou period. There are 4 structural evolution stages: north-south accumulation, west-east subduction, uplift mantle and thin crust, alternative open and close. There are 4 kinds of pool-forming patterns:(1) pattern with the migration along the unconformity and fault to the near crater;(2) pattern with the migration along unconformity and fault to the rift margin;(3) pattern with the migration along unconformity, fault and fracture to the source rock;(4) pattern with the migration of the deep gas along the deep and large fault to the volcanic trap.

研究认为，松辽盆地北部深层火山岩主要存在四种火山岩相：即爆发相、溢流相、火山通道相、火山沉积相，划分为四个火山喷发旋回：即火石岭期、沙河子期、营城子期、泉头期，经历了四个构造演化过程：即南北夹攻、东西俯冲、幔隆壳薄、开合交替，具有四种成藏模式：即沿不整合面和断层运移至近火山口处火山岩圈闭聚集成藏模式、沿不整合面和断层砂岩疏导层运移至断陷边部火山岩圈闭聚集成藏模式、沿不整合面及断层、裂缝运移至源岩区内凹中隆火山岩圈闭聚集成藏模式、深部无机成因天然气沿深大断裂运移至火山岩圈闭聚集成藏模式。

The volcanics are most commonly andesitic in composition.

火山岩的组成最通常是安山岩。

The study of their precise UPb geochronology and characteristics of rock associations shows that (1) small amount of EarlyTriassic (~248 Ma) volcanic rocks were preserved and cropped out in the area, which consist mainly of thin bed of andesitic rocks intercalated with minor basaltic andesites; that (2) the MiddleTriassic magmatism was characterized by extensive felsic igneous rocks with minor basalts interbedded in the middle of volcanic sections in part of areas, and the late MiddleTriassic rhyolites and main body of Lincang granitic batholith have the same extrusive/intrusive time with the age of ~230 Ma; that (3) the LateTriassic volcanic sequences are principally composed of basalts with minor interlayered rhyolites, exhibiting typical characteristics of bimodal volcanics.

三叠纪岩浆作用广泛发育于澜沧江南带，锆石UPb年代学结果及岩石组合特征显示：(1)该区残留有少量的早三叠世火山岩(约248 Ma)，主要为一套薄层的以安山岩为主的火山岩；(2)中三叠世以大规模的酸性岩浆作用为主，部分地段的中部夹有少量的玄武岩，其中晚期的流纹岩与该区出露巨大的临沧花岗岩基主体具有一致的形成时代(约230 Ma)；(3)晚三叠世则以基性火山岩为主，夹少量流纹岩为特征的&双峰式&火山岩组合。

In east adjacent regions Toudaogou of Hami, Zhou Ji yuan found brachiopoda fossil of Early Ordovician in the same stratum of pyroclastic rock with intemediate-basic volcanics: Orthambonites sp., O.

东邻区哈密头道沟，周济元等在相当于火山岩建造的上部层位的火山碎屑岩夹中基性火山岩中发现早奥陶世腕足化石：Orthambonites sp。， O。

The epicontinental arc volcanics related to the Permo-Triassic activities suggest the subduction of the Jinshajiang oceanic crust,and the ocean-continent tectonic regime transformation and the northward accretion of continental crust.

与二叠纪和三叠纪活动陆缘有关的陆缘弧火山岩带反映金沙江洋壳发生消减、洋-陆构造体制转换和大陆地壳向北增生的过程。

Youfangxi-Erbahuo area is situated in Late Hercynian Nanxingan geosynclinal fold belt and developed with Mesozoic volcanics, strong Yanshanian intermediate-acid magrnatism and a series of volcanic-subvocanic hydrothermal Ag polymetal ore deposits.

摘要内蒙油房一二把伙地区位于华北地台北缘南兴安晚华力西期地槽褶皱带，中生代火山岩系发育，燕山期中酸性岩浆活动强烈，形成了一系列火山、潜火山热液型银多金属矿床。

The three volcanics are of kalium alkaline series,with their chemical elements showing the same magma origin.

三种火山岩均属钾质钙碱性系列，岩石化学成分显示为同源岩浆产物。

In volcanics reservoir evaluation, lithologic identification directly affects the reliability of evaluation results.

在火山岩储层评价中，岩性识别的正确与否直接影响评价结果的可靠性。

The magmatite in the area consist mainly of granite, monzonitic granite, syenogranite and acid volcanics.

研究区出露的岩浆岩主要为花岗岩、二长花岗岩、正长花岗岩和酸性火山岩，岩石化学成分上以富铝钾、贫镁铁，且经历了较大的分离结晶作用为特征。

Voluminous volcanic rocks of the Tiaojishan Formation outcrop in the Western Hills of western Beijing, which are unconformably overlain by the volcanics of the Donglingtai Formation.

北京西山地区分布着大量的髫髻山组火山岩，区域上髫髻山组被东岭台组角度不整合覆盖。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。