lower crust造句

• The velocity difference between the two layers of the lower crust is not obvious
  下地壳的两构造层速度差异不明显。
• ( 3 ) the mineral source was provided by both lower crust , upper mantle and upper crust , obviously from crust - mantle mixing
  ( 3 )矿田中的成矿物质的不仅来自于下地壳和上地幔，而且还来自于上地壳，具有壳幔混合特征。
• N2 - rich inclusions were first founded in ore area ; it may form by upper mantle or lower crust material during oxidation - devolatilization reactions
  铁矿体被铜矿体包围，铁矿石被铜矿细脉穿插，说明铜矿化的形成晚于铁矿化。
• The formation of the enriched mantle ( em1 ) is attributed to the strong metasomatism - taking place between subducted yangtze lower crust and nc ( north of china ) ancient lithosphere
  2 、火山岩、碱性超基性脉岩和基性脉岩(除少数外)都形成于大陆板内拉张环境。
• Studies on the metamorphic history of the granulites on a very old platform provide us some important information of the properties , status and forming processes of the lower crust and forming mechanism of the early continent crust
  古老地台麻粒岩的变质历史研究可以为我们深入了解下地壳性质，状态及形成过程，探讨早期大陆地壳的形成机制提供重要的信息。
• One is the effect of quick stretching of lithosphere , upwelling and temperature raising of upper mantle , the other is result of the flexibility discrepancy among upper , lower crust and lithosphere under crust during the lithosphere cooling
  该运动以及渤海湾盆地在伸展裂陷阶段的多次构造运动说明渤海湾盆地呈现出幕式沉降过程，东营运动则具有更重要的动力学意义。
• Finally , some possible physical mechanisms , for example the coulomb stress - triggering mechanism , the dynamic stress - triggering mechanism and the lower crust and upper mantle flow deformation mechanism , which may generate these coseismic and post - seismic anomalies , are discussed
  同时，还从库仑破裂应力触发、动态应力触发以及下地壳和上地幔流动变形机制等方面，对这些大震效应作了一些成因机理讨论。
• All of the mafic samples have age - corrected moderate enriched sr and enriched nd isotopic ratios and the felsic rocks span larger range in the initial sr and nd isotopic ratios than mafic volcanics , similar to isotopic compositions of lower crust of north china block
  在sr - nd同位素组成上，中基性火山岩为中等富集的sr和低的nd同位素比值；中酸性火山岩的sr同位素比值总体较中基性岩高且变化大，类似华北陆块下地壳岩石的同位素组成特征。
• While there is no distict evidence to prove the tanlu fault ' s noted deep and dynamic behavior within the lower crust or even on the upper mantle . thus there still exists a necessary to research and check the understanding about the boundary ' s location and the dynamic background
  作为一级构造单元分界线的红河断裂、怒江断裂是超壳断裂，而昌宁双江断裂显示为低角度铲式断层，中下地壳无与之对应的速度异常，可能意味着该断裂切割不深。
• Geologists and geophysicists have carried out substantial work on petrology , geochemistry , chronology and geophysics , et al . , which yields important reference material and constrains for explanations of questions , such as the delamination and exhumation mechanism for the lower crust , models of the rapid uplift of himalayan orogen and deep subduction of india - eurasia plate . while only a little has been done to study the eastern syntaxis at present
  地质学家和地球物理学家已经对西构造结进行了大量的岩石学、地球化学、年代学和地球物理学等方面的研究，为解释下地壳的拆沉、折返机制，喜马拉雅造山带的快速隆升和印度-欧亚板块的大陆深俯冲模式等提供了重要的参考信息和约束条件。
• A ree partition simulation suggests that the tianzhushan intermediate rocks can be generated by partial melting , in coupling with fractional crystallization , of dioritic gneiss which is similar in chemical compositions to the mafic rocks in the lower crust in north dabie ; partial melting of intermediate grey gneiss which is similar in chemical compositions to the middle crust in north dabie can generate the tianzhushan felsic rocks
  Ree配分的定量模拟计算结果表明，与基性下地壳相似的北大别基性闪长质片麻岩部分熔融并经过结晶分异能够形成与天柱山中性岩类似的稀土元素组成，而与中性地壳相似的北大别中性灰色片麻岩部分熔融能够形成与天柱山花岗岩类似的稀土元素组成。
• There are distributed a great number of cenozoic basalts and mantle derived xenoliths in north china and south china . for understanding the materials constitutes , evolution , mantle metasomatism , and inhomogeneity of the lower crust and upper mantle , there is a must of doing some research on these host basalts and the xenoliths
  华北、华南地区发育大量新生代玄武岩及幔源包体，对其进行研究，有利于进一步深入了解下地壳和上地幔的物质组成、演化、地幔交代和不均一性以及地球物理反演结果的可靠性等。
• It shows that the resolution of the crust interface ' s shape on this four profiles is very good , nevertheless that of the velocity structure is relatively poor . the crust and upper mantle ' s fine configuration on the hq - 13 profile is obtained by our tomography , which reveals some important structure and dynamic features of this region : the velocity structure of the crust consists of three layers , the upper crust , the middle crust and the lower crust . however it also can be divided into six lateral blocks , each of them " s velocity is always higher or lower than that of its neighboring blocks
  本文第五章利用有限差分反演和射线反演的方法获得了符离集?奉贤地震测深剖面( hq - 13线)精细的地壳上地幔结构剖面，揭示出下扬子地区一些重要的结构和动力学特征：地壳速度结构在纵向上大致可分上地壳、中地壳和下地壳三部分，横向上可划分为6个块体，各块体的p波速度沿测线方向呈现高速?低速?高速的组合。
• Ree partition simulation suggests that the tianzhushan intermediate rocks can be generated by partial melting , in coupling with fractional crystallization , of dioritic gneiss which is similar in chemical compositions to the mafic rocks in the lower crust in north dabie ; partial melting of intermediate grey gneiss which is similar in chemical compositions to the middle crust in north dabie can generate the tianzhushan felsic rocks
  Ree配分的定量模拟计算结果表明，与基性下地壳相似的北大别基性闪长质片麻岩部分熔融并经过结晶分异能够形成与天柱山中性岩类似的稀土元素组成，而与中性地壳相似的北大别中性灰色片麻岩部分熔融能够形成与天柱山花岗岩类似的稀土元素组成。
• Alkali basite , which came from upper mantle or lower crust , invaded through those structure , which not only bring cu et al mineralizing elements , but also the most important is that thermal energy . it cycled the formation water ( yinmin fonnation and luoxue formation ) , and form alkali - rich , middle - high temperature and salinity fluid mixed with alkali - rich magmatic water . there were high rate of percolation and well voidage in the contact zone between yinmin purple stratum and yinmin rubblerocks , which is in favor of the transposition and mineralization of minerogenetic fluids
  因此，总结东川稀矿山式铜矿成矿模式为沉积( fe 、 cu ) ?热液叠加( cu )改造：晋宁-澄江期，小江深大断裂发生走滑运动，在东川矿区造成右行旋扭及其派生构造，形成“ z ”字形落因破碎带，同时来自深源(下地壳或上地幔)碱基性岩浆侵入，不仅带来了大量cu等成矿物质，更重要的是提供了热源，促使地层水(落雪组白云岩和因民组紫色层)循环，与富碱( na和k )岩浆水混合，形成富碱中高温高盐度流体。