玄武岩的

This conclusion, combined with the data obtained from the short-lived Hf-W and Sm-N d isotopic systematics, suggests that the Moon was initially accreted at 4.5 Ga, followed by development of the global lunar magma ocean. The primary lunar crust is composed by ferroan anorthosite which was produced by flotation of plagioclase during crystallization of the LMO. However, the mafic minerals, coevally crystallized with the plagioclase, sank to the base of the LMO due to their high density, and made up the main part of the lunar mantle, which served as the source during later mare basaltic magmatism.

根据这一年代资料，结合对月岩样品进行的短半衰期Hf-W与Sm-Nd同位素体系的研究结果，认为月球大致形成于45亿年，其后开始由岩浆海导致的内部核－幔－壳的分异，岩浆结晶的低密度斜长岩构成最初的月壳，而密度大的岩石构成月幔，而此月幔则成为后来月海玄武岩的主要岩浆源区。

Stepping stones into the sea, these basaltic columns of the Giant's Causeway in Northern Ireland formed from volcanic activity some 50 million to 60 million years ago.

供踏脚的石头到海洋里，这些玄武岩的柱状物的巨大的堤道在北部的爱尔兰形成的从火山的活动约5000万年到6000万年以前。

Photo Gallery: Rocks Stepping stones into the sea, these basaltic columns of the Giant's Causeway in Northern Ireland formed from volcanic activity some 50 million to 60 million years ago.

供踏脚的石头到海洋里，这些玄武岩的柱状物的巨大的堤道在北部的爱尔兰形成的从火山的活动约5000万年到6000万年以前。

Two REE distributed pattern, LREE-depleted and flat, which display a specific character of typical mid-ocean ridge tholeiite, indicate that primary magma may be derived from near primary or a typical large ion lithophile element-depleted mantle.

岩石稀土元素配分模式可分为LREE平坦型和LREE亏损型两类，指示了其原始岩浆起源于近原始或典型的大离子元素亏损型的地幔，为典型的大洋中脊拉斑玄武岩的特征。

In addition, the features of elemental geochemistry of all samples suggest that (1) the EarlyTriassic andesitic rocks, characterized by characteristic natures of island arc volcanics, likely erupted in the subduction setting; that (2) the generation of LateTriassic rhyolites with an affinity of Alike granite and synchronously main body granites in the Lincang batholith displaying similar geochemical features, is closely related with the postcollision or latecollision setting; that (3) although the LateTriassic basic rocks partly show island arc volcanics such as highAl contents and NbTa depletion, some of them possessing highMg contents and mostly having traceelement ratios similar to intraplate basalt, which indicates that they erupted in the postcollision rift environment.

元素地球化学特征表明，早三叠世火山岩具有典型的岛弧火山岩的特征，暗示其很可能形成于俯冲的构造环境；中三叠世晚期的流纹岩与临沧花岗岩基主体具有非常相似的地球化学特征，结合其流纹岩具有A型花岗岩属性，表明该区中三叠世火成岩形成于碰撞后的构造背景；而晚三叠世基性火山岩虽然在地球化学特征上显示出与岛弧火山岩相似的高铝和NbTa的亏损，但其中部分火山岩具有高镁和板内玄武岩的微量元素比值特征，说明这些火山岩可能形成于碰撞后裂谷环境。

Petrogenesis simulation indicates that the Tianheyong primitive basaltic magma may have been the product of polybaric melting column with nonmodal partial melting processes of enriched lherzolite, which straddle the boundary of garnetand spinelfacies lherzolite.

岩石成因模拟表明，形成天和永玄武岩的原生岩浆是在变压、部分熔融的条件下富集地幔源区岩石非实比熔融的产物，变压熔融柱穿切了Sp/Gt二辉橄榄岩相边界。

PGE parameters of the Dashibao Formation basalts are identical to the general trend of the Zhengziyanwo intrusion, and this might infer that there is a genetic link between them.

大石包组玄武岩的PGE参数与正子岩窝岩体的总体趋势具有很好的吻合性，暗示着两者之间具有一定的成生联系。

We examined the origin and source of both high-Ti and low-Ti basalts of most large igneous provinces on Earth and found that they are generated from distinct mantle sources, rather than time-dependent.

根据对地球上两类玄武岩的源区和成因研究，发现它们应该是来自不同的地幔源区，而与其形成的时间没有关系。

Distribution scope of the Emeishan basalt is quite broad, and the most main rock type is low-Ti basalts and high-Ti basalts, and has the few picritic basalts, picrites and meymechites.

峨眉山玄武岩分布范围比较广，最主要的岩石类型是低钛玄武岩和高钛玄武岩，并有少量的苦橄质玄武岩、苦橄岩和麦美奇岩。

Three classes of MORBs are distinguished in the transform domain: E-MORBs,Primitive N-MORBs and N-MORBs.Two mantle sources are identified in the Siqueiros region.

转换断层内的洋中脊玄武岩可分三类：富化的洋脊玄武岩、原始的正常洋脊玄武岩(PrimitiveN-MORB)和正常洋脊玄武岩。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。