火山岩系

丰富的铜质来自巨厚的裂谷火山岩系（橄榄拉斑玄武岩）。

Abundant copper material was derived from volcanic rock series ( olivine tholeiite ) in the rift .

蛇绿岩由变质橄榄岩、堆积辉长岩和上部层位基性火山岩系构成。

The ophiolite is composed of metamorphic peridotite , accumulative gabbro and the upper-seated basic volcanic rock series .

该火山岩系底部超镁铁岩的REE分布模式为轻稀土富集型，有小的Eu正异常；细碧岩-石英角斑岩也是轻稀土强富集型，Ce和Eu有轻微的正异常；

REE patterns of spilites , keratophyres and ultramafic rocks under the volcanic rocks show strong enrichment in LREE with unobvious Ce and Eu positive anomalies .

通过主元素、稀土元素、Sr、Nd、Pb同位素地球化学特征并结合板块俯冲模式来讨论长白山地区新生代火山岩系的形成和演化。

Major element , REE and Sr , Nd , Pb isotope geochemistry is dealt with for the cenozoic volcanic rocks in Changbaishan area , Northeast China .

稀土、微量元素和Sr、Nd同位素特点揭示：该火山岩系形成于大陆裂谷环境；

Studies on REE , trace elements and Sr , Nd isotopic compositions reveal that the Qi'eshan Group volcanic rocks were formed in a continental rift setting ;

北桐柏地区镁铁质麻粒岩锆石U-Pb年代学及变质作用东秦岭-桐柏-大别山碰撞造山带北部早古生代变质火山岩系特征及其形成环境

Zircon U-Pb geochronology and metamorphism of mafic granulite from North tongbai , central china . the characteristics of the metavolcanic rock series of Early Palaeozoic era and the structural environment of their genesis in the northern part of the East qinling-tongbai-dabie collision type orogenic belt

伸展盆地的晚期阶段，在中酸性火山岩系与上覆碳酸盐岩接触带中产出赵卡隆式VHMS矿床，具有Ag-Fe-Pb-Zn金属组合特征，形成于浅水环境；

In the late stage of the extension basin , the " Zhaokalong-type " VHMS deposits showing the association feature of elements ( Ag-Fe-Pb-Zn ) formed in the contract strip between the intermediate-acidic volcanic rocks and the overlying carbonate rocks and developed in the shallow-water facies .

浙江寿昌地区中生代火山岩系的地球化学特征

Geochemistry of Mesozoic volcanic rock series in shouchang , Zhejiang Province

中国东南部白垩纪火山岩系的划分与对比

The division and correlation of Cretaceous volcanic series in Southeast China

晚中生代火山岩系包括4个火山旋回；

The late Mesozoic volcanic series includes 4 volcanic cycles .

山东省白垩纪岩石地层序列与火山岩系地层划分

Division of the Cretaceous lithostratigraphic and volcanic sequences of Shandong

基性火山岩系具有同一岩浆源区。

The volcanic rock series has same magma source .

主要为中、高钾钙碱性火山岩系；

The volcanic rocks are mainly middle and high - k calc-alcaline series .

根据同位素年龄讨论侏罗、白垩纪火山岩系地层的时代

On the ages of Jurassic and Cretaceous volcanic rocks by the radiometric dating

中朝边境地区新生代火山岩系对比

Comparison of Cenozoic volcanic rocks at the Sino-Korean boundary

昌宁-孟连地区火山岩系基本特征及构造环境的认识

Basic features of volcanic rock series in Changning Menglian region and their structural environment

熊耳裂谷火山岩系金-多金属矿床成矿模式

The genesis model of the gold-polymetal deposit from the volcanic rocks in the Xiong'er rift

厚达几千米的火山岩系为成矿提供了丰富的矿源；

The volcanic rocks thousands meters in thickness serve as the ore source for the metallization .

根据沉积夹层，将火山岩系划分为四个火山喷发&沉积旋回。

They can be divided into four volcano & sedimentary cycles according to the sedimentary beds .

自下而上的地层序列是火山岩系-火山碎屑灰岩-生物碎屑灰岩；

Special stratigraphic sequence ( from bottom upwards ): volcanic rocks , pyroclastic limestone and bioclastic limestone ;

也不属于北祁连加里东构造带南带变质火山岩系的一部分。

They also do not belong to the south meta-volcanic rock series of Northern Qilian Caledonides tectonic belts .

宁芜北段姑山组火山岩系的时代讨论

A Discussion on the Time of Volcanic Rock System for Gushan Fm . , North Section of Ning-Wu

有关长江下游中生代晚期火山岩系中铁矿的若干问题

Problems concerning the iron ore deposits in the late Mesozoic volcanic formations of the lower Yangtze Valley Region

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 .

北秦岭北祁连（天水宝鸡）间早生古代火山岩系及其构造连接关系的研究

The early Palaeozoic volcanic rock series and its interconnection relationship between the North Qinling and the North Qilian orogens

萑香洼金矿床产于华北陆块南缘中元古界熊耳群火山岩系中。

Huanxiangwa gold deposit is formed in Proterozoic Xionger group volcanic rock in the southern range of North China landmass .

北祁连山系内，分布着一套类型十分齐全的新元古代-早古生代海相火山岩系。

A sequence of Neoproterozoic-early Palaeozoic marine volcanic rocks with a full range types is distributed in the North Qilian Mountains .

通过1∶5万区调填图，在原划上石炭统奇尔古斯套组内发现一套火山岩系。

Through the1 ∶ 50000 regional geological mapping , a suite of volcanic rocks was discovered in the original Upper Carboniferous Qirgustaw Formation .

其古水流方向为NNW&NNE向，物源区为南侧的碧口火山岩系。

The paleocurrents were oriented in a NNW-NNE direction , which indicates that the provenance was the Bikou volcanic series to the south .

桂北丹洲群厚度大，岩相纵向演化复杂，含有浊流沉积和海相火山岩系，并发育顺层韧性剪切变形。

Danzhou Group of Guangxi with a great thickness contains turbidity current deposit and marine volcanic sequence with ductile shear deformation in it .