一般来说，下地壳的成分接近于玄武岩，而上地壳的物质成分与花岗岩相似。
In general, the composition of lower crust is close to basalt and the composition of upper crust is similar to granite.
地幔物质的上隆及上侵作用使上地壳裂解断陷，而中地壳在地幔、下地壳的影响下形成相间展布的低速—高导层。
Under the influences of mantle and lower crust, the low-velocity layers alternating with high conductive layers distribution occurred in middle crust.
在下地壳下部有一数公里厚的高速致密的壳-幔混合物层，其形成原因是由于上地幔物质上涌并迁移到下地壳的结果。
It is a mixture of crust and mantle materials which resulted from the upwelling and transporting of the upper mantle material.
对地球引力的研究表明，在不寻常的负荷之下地壳和地幔会发生位移。
Studies of thegravity field of the Earth indicate that its crust and mantle yieldwhen unusual weight is placed on them。
OBS记录到了包括莫霍面在内的地震波，可以识别地壳内沉积层、上地壳层、下地壳层等多个层位的折射波地震相。
The OBS has recorded Moho and other seismic waves, the sedimentary layer, the upper crust layer and the lower crust layer can be identified from it.
上地壳表现为脆性变形，中、下地壳为韧性的流动变形。
The middle crust and the lower crust is in the ductile field.
老湾花岗岩的岩石化学、稀土元素和同位素特征指示出老湾花岗岩源于下地壳经部分熔融作用形成。
The lithochemistry, REE and isotope characteristic of strontium, oxygen and lead of Laowan granite show that the granite originates from lower crust by partial melting.
这种北倾的反射为松潘地块向西秦岭下地壳俯冲提供了地震学证据。
The north-dipping reflection constitutes seismic evidence for the northward subduction of the lower crusts of the Songpan block and West Qinling orogen.
形成晶体的碳质来源不均一，反映了中元古代华北陆台下地壳岩浆成分的不均一性。
Heterogenity of the carbon source implies the magma beneath the North China platform was not homogeneous at Late Mesoproterozoic.
它是分布于过渡性地壳上的、由起源于下地壳—上地幔的过渡性岩浆的衍生物形成的斑岩型铜银锡矿床。
It is a porphyry copper-silver-tin deposit that occurs in the transitional crust and was formed by derivatives of the lower crustal-upper mantle transitional magma.
东沙高磁异常含一定的高频成份，与新生代玄武岩及中生代岩浆岩有关，而其低频成份可能反映了发育的下地壳高速层。
The high frequency part of Dongsha high-value magnetic anomaly may be related with Cenozoic basalt and Mesozoic magmatic rocks, and the low frequency part developing high-velocity lower crust.
岩石主要由幔源岩浆与中下地壳物质部分熔融形成的花岗质岩浆的混合形成的。
They were formed by mixing of the partial melting granitic magma of crust-derived material and mantle-derived basic magma.
本文着重介绍了在中下地壳温度、压力条件下进行的几种岩石半脆性蠕变的实验研究结果。
This paper deals with some results of experimental study on semi-brittle behavior of rocks at the conditions relevant to the middle-lower crust.
捕虏体的加权平均值比基于麻粒岩地体资料估算的下地壳平均组成偏基性，揭示了二者可能的成因差异。
The weighed average composition of xenoliths shows a more mafic composition of the lower crust than that estimated from granulite data, which may imply the difference in the genesis.
笔者们认为二辉麻粒岩包体是下地壳中某种基性岩发生部分熔融，形成中酸性斑岩后的难熔残体，并且利用微量元素的定量模式计算了部分熔融的程度。
The writers think of the two-pyroxene granulite enclaves as the undissolved renains while some kind of basic rock in crust is partly dissolving and after the mid-acid porphyry formed.
造成断裂分期活动的原因是藏东地区下地壳流体的存在。
The faulting might be attributed to the ascending lower crust-derived fluids after the Late Miocene epoch.
青藏高原不是印度板块与欧亚板块碰撞的结果，而是形成于下地壳流动驱动的板内盆山作用。
The formation of the Qinghai-Tibet Plateau was not caused by the collision between India plate and Eurasia plate, but by intraplate basin-mountain coupling driven by lower crustal flow.
多方面的结果表明，地震学方法为当前流行的下地壳流动模型提供了深部证据。
From other researching aspects, the seismological method provides the evidences to support the flowing model of low mantle, which are popular in the researchers.
本文的研究成果再次证实了下地壳流体对大坪金矿成矿的贡献。
The results in this study reconfirmed that the lower crust fluid played an important role in the mineralization of Daping mine.
松散土体是自然条件下地壳表层系统不断演化的产物，土的生成环境及其演化决定着土体的基本特性。
As soil is the product of the nature, the property of soil is determined by the evolutionary environment.
上述资料表明本区的麻粒岩是形成于晚元古代前后的中下地壳产物。
The data mentioned above lead to suggest that the granulites are the representatives of middle to lower crust formed round about late Proterozoic era.
总体北倾的莫霍面和同样北倾的下地壳结构记录了中生代扬子陆块的向北俯冲。
The North-dipping structure recorded northward subduction of the Yangtze block happened in Mesozoic.
由此说明，是下地壳环境的产物。
Thus it is indicated that they are the products of lower crust environment.
我们的研究结果显示，一半的据称深源地震确实始于中部地壳和下地壳地区。
Our results show that half of the purportedly deep earthquakes are indeed originating from depths attributable to middle-crust and lower-crust regions.
大别地区富k岩系的源区与富集地幔密切相关，下扬子地区的则与下地壳有更多亲缘关系。
The source area of K-rich magmatic rocks in the Dabie area is closely related to the enriched mantle, while the rocks in the lower Yangtze Valley area are more affined to the lower crust.
建立了南北地震带北段下地壳部分熔融几何形状和分布的模型。
Partial melt models in different geometrical configuration and distribution are established.
本文认为，大洋岩石圈拆沉和大陆下地壳拆沉是不一样的：(1)拆沉的物质不同。
The author thinks that the ocean lithosphere delamination (OLD) is different from the continental lower crustal delamination (CLCD) in the paper: (1) the different delamination material.
复杂的岩石类型和不同的形成条件表明女山的下地壳是由多期岩浆活动的产物组成。
Complex granulite facies xenolith types and distinct formation conditions indicate that the lower crust beneath Nushan was constructed by multi-periodic magmatism in different tectonic Settings.
复杂的岩石类型和不同的形成条件表明女山的下地壳是由多期岩浆活动的产物组成。
Complex granulite facies xenolith types and distinct formation conditions indicate that the lower crust beneath Nushan was constructed by multi-periodic magmatism in different tectonic Settings.
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