lower crust
下地壳;下部地壳
2026-03-21 18:12 浏览次数 13
下地壳;下部地壳
Lower basaltic crust下地壳玄武质巖石
mid lower continental crust大陆中
lower continental crust大陆下地壳
the lower crust下地壳
the lower continental crust大陆下地壳
delaminated lower continental crust拆沉陆壳
middle-lower continental crust中
pre-existing lower-crust structure先存下地壳构造
continental lower crust大陆下地壳
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.
老湾花岗巖的巖石化学、稀土元素和同位素特征指示出老湾花岗巖源于下地壳经部分熔融作用形成。
the primitive pb was mainly derived from the lower crust and upper mantle;
矿床中的原 始铅主要来源于地壳深部或上地幔;
this paper gives a brief summarization on the petrology, p-t conditions, major and trace element geochemistry, isotopic composition, geophysical character of lower crust granulite xenoliths.
产于火山巖中的下地壳麻粒巖包体是人们窥视深部地壳的一个窗口,现已成为人们探索大陆下地壳物质组成和演化最直接的研究对象。
structure of the lower crust and detachment and subduction of the lithosphere of the south qinling;
中下地壳组成、结构与演化研究一直是地球科学研究中为人们关注的重要课题。
it is postulated that a high conductive body exists in the lower crust or upper mantle.
据此推测在地壳下部或地幔上部存在一高导体。
thus it is indicated that they are the products of lower crust environment.
由此说明,是下地壳环境的产物。
the intrusive is believed to be syntectic type with its diagenetie materials derived from the lower crust and upper mantle.
认为该巖体为下地壳或上地幔源,属同熔型。
these data suggest that the magma was partially melted from enriched mantle source, which was effected by lower crust materials within the source, and followed by crystal fractionation.
其地幔源区具有同位素富集特征,表明火山巖源区曾受到地壳物质的影响,是富集地幔部分熔融的产物,并经历明显的结晶分异作用。
the middle crust and the lower crust is in the ductile field.
上地壳表现为脆性变形,中、下地壳为韧性的流动变形。
according to the modeling calculation by sr isotopic data, its source rocks were a mixture composed of 65% upper crust and 35% lower crust materials.
根据锶同位素资料模拟的大容山花岗巖源区巖石,相当于65%上部陆壳加上35%下部陆壳物质的混合物,成分上相当于英云闪长巖。
the parent magma of several rock series formed earliest originated from the lower crust of granulite facies;
最初形成的巖系的母巖浆,起源于麻粒巖相的下地壳。
for the internal orogenic system, the lower crust and lithospheric mantle is instead eventually replaced by more continental lithosphere from a collided continental fragment.
而对于内造山系统,下地壳和巖石圈地幔最终被合并到一起的陆块巖石圈所替代。
in general, the composition of lower crust is close to basalt and the composition of upper crust is similar to granite.
一般来说,下地壳的成分接近于玄武巖,而上地壳的物质成分与花岗巖相似。
the results in this study reconfirmed that the lower crust fluid played an important role in the mineralization of daping mine.
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。
if the squeezing model were correct, he says, one would expect higher temperatures in the lower crust in order for it to be 「squeezable.」
如果挤压模型是正确的话,他说,那么深部地壳需要有更高的温度使得它更具有可塑性。
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.
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。
it probably represents an active thrust or a huge decollement zone, along which the intact indian crust or its lower crust undsrthrusts southern tibet;
它可能代表了一个活动的道沖断裂或是一条巨大的拆离带,印度地壳整体或下地壳沿此拆离层俯沖到藏南之下;
the metallogenic mechanism is as follows:in the latest jurassic, the melting layers of granite magma in the lower crust were formed by the regional plate movement.
成矿机理是:区域板块运动使本区在侏罗纪末下地壳形成花岗巖浆熔融层。
the change of the p wave velocity from upper crust to lower crust is consistent with the evolution history of the tectonic stress filed.
从上到下的速度等值线走向变化体现了该地区的构造应力场演化历史;