basic rocks

The basic volcanic rocks of the first cycle belong to the alkali basalt magma series and those of the second and the third cycles the tholeiitic magma series.

第一旋回基性火山岩属碱性系列，第二、三旋回基性火山岩属拉斑玄武岩系列。

Taking Mesozoic volcanic rocks in Eastern Fujian as an example, the authors put forward a new cartographic unit of volcanic terrains ( volcanic cycle, volcano tectonic element and lithofacies assemblage), in which the volcano tectonic element is a basic cartographic unit.

以福建省东部中生代火山岩为例，提出以火山旋回-火山构造单元-岩相（组合）作为火山岩区的三级填图单位，其中火山构造单元为基本的填图单位。

The basic idea is that rocks are enormous, strong and suggest eternity.

根本的观念是:石头是伟大的, 坚固的,而且具有永久性.

The basic slope failure pattern of tension fissure-circular surface slip-plane failure is obtained for study of slope failure of flat rock strata by use of double bottom friction model by which the difference in strength of various rocks can be reflected.

采用双层底面摩擦模型，研究近水平岩层边坡破坏模式，能体现出不同岩体在强度上的差异，得到近水平岩层边坡破坏为张裂缝圆弧面平面的边坡滑动破坏的基本模式。

The Cretaceous is an intraplate-rifting stage, characterized by representative geological elements such as AA-type granite, red down-faulted basins, bimodal subvolcanic rocks and basic volcanic rocks.

白垩纪为陆内裂谷阶段，形成的代表性地质要素有AA型花岗岩、大量陆相红色断陷盆地、基性火山岩、双峰式次火山岩等。

Research on gem deposit mineralization related to basic rocks

与基性岩有关的宝石矿床成矿作用的研究

The basic rocks, which belong to alkali and tholeiitic magma series, enriched in LREE and LIL. The magmatic source of basic volcanic rocks was enrichment mantle being analogous to oceanic island basalts sources.

基性火山岩有磁性玄武岩与拉斑玄武岩两个岩浆系列，且富集LREE与LIL，其岩浆源区为与洋岛玄武岩源相似的富集地幔柱源。

According to the difference of Pb isotopic characteristics, Jiao-Dong Group rocks are divided into two units ie. acidic rock with high μ value of Pb isotopic characteristics and basic rock with "old" Pb characteristics.

按Pb同位素特征划分，胶东群应分为两个单元，一是具有高μ值Pb同位素特征的较酸性岩石，另一个是具有老Pb特征的较基性岩石。

Geological features of BASIC-ULTRABASIC rocks and its prospecting direction in Jilin Province

吉林基性超基性岩的地质特征及找矿方向

Study of strontium isotopic geochemical characteristics and genesis of certain pegmatites and basic rocks in China

中国若干伟晶岩和基性侵入岩的Sr同位素特征及成因探讨

Some of basic rocks contaminated by the crust materials could be formed by the AFC process, but the magma source are N-MORB compostion, rather than alkaline OIB or E-MORB compostions.

而受到地壳组分混染的基性岩，部分可能是通过AFC作用形成，但是其岩浆源非本研究中的碱性OIB或E-MORB样品，而是类似于N-MORB成分。

Preliminary study on metamorphic basic rocks in the Grove Mountains, East Antarctica

东南极格罗夫山变基性岩初步研究

At the Paleo-Mesoproterozoic era, the meta-basic-ultrabasic rocks on eastern Hainan are oceanic low K arc tholeiite with the features of mafic-basaltic komatiite evidently, originated from highly depleted mantle and are formed under the tectonic setting of volcanic arc.

古中元古代时，琼中屯昌变基性-超基性岩，为大洋型火山岛弧低钾拉斑玄武岩，明显具有镁铁质-玄武质科马提岩特征，来源于高度亏损的地幔；

The studies show that the rocks in Okinawa Trough is of a subalkaline rock series. The basic rocks belong to a transitional form between tholeiite series and calc alkalic series while most of the intermidiate rocks and acid rocks belong to calc alkalic series.

研究表明，冲绳海槽火山岩均属亚碱性系列，基性岩具有拉斑玄武岩系列和钙碱性系列的过渡性，中、酸性岩多属钙碱性系列；