地壳构造的
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Is the short crack structure may explain certain landform growth origin question in the short crack structure aspect's significance; The short crack structure causes the epeirogenesis causes the earth's crust material to be destructed this to contain the ore solution to provide the good migration channel and stores the place and so on five aspects.
在短裂构造方面的意义是短裂构造可以解释某些地貌发育的成因问题;短裂构造引起的地壳变形,使地壳物质遭到破坏,这就为含矿溶液提供了良好的迁移通道和贮存场所等五个方面。
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By means of different subjects and te chniques,the paper makes an overall study on the crustal stability of Beihuaiyang region and its adjace nt areas from the aspects of current t ectonic stress fields,principal fa ult structures,analysis of regional fa ults and neotectonic activity,seis mic activity and numerical modeling,etc.
运用多学科、多技术相结合的研究方法,从现今构造应力场特征、现代地壳形变特征、主干断裂构造以及区域断裂活动性分析、新构造运动、地震活动、数值模拟等方面入手,对北淮阳及其邻接区地壳稳定性进行了全面而系统的研究,指出本区地震活动受走滑活动断裂控制,中、强地震集中于区内东南部和西北部NW向与NE向断裂交汇处;第四纪无大规模差异升降运动;数值模拟等综合分析表明,信阳地区的区域构造稳定性高,现代地壳形变量小,应力平缓,地震活动少且弱。
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In this project, we have deduced the joint inversion model of geodetic data, seismic data and geological data considering about their weight ratio; presented Bayes-iterative search inversion algorithm which improved on the traditional Bayes algorithm and strengthen the stability of inversion solutions; enriched and developed geodetic joint inversion theory and method of tectonic stress field; joint with geodetic, seismic, geological and geophysical data, we have inverted the temporal and spatial variation characteristics of crustal deformation of active tectonic blocks in North China and the present-day cruatal movement and strain-stress field by FEM, DDA and bi-cubic spline function fit method; especial for the crustal deformation result in some typical areas, we have presented geodynamical interpretation and done some seismic dangerous estimations.
大地测量联合反演构造应力场属于大地测量与地球动力学和地震学的交叉研究领域,主要内容是研究用大地测量地壳运动监测数据定量研究地壳运动和变形的动力学问题及分析预测地震,本项目推导了兼顾权比确定的大地测量、地震和地质三类数据的联合反演模型;提出贝叶斯-轮回搜索反演算法,改进传统的贝叶斯方法,改善反演解的稳定性;丰富、发展了大地测量反演构造应力场理论及方法;联合大地测量、地震、地质、地球物理数据采用有限单元法、块体不连续变形分析法和双三次样条函数拟合方法反演分析了华北地区活动地块运动时空变化特征以及中国大陆现今地壳运动与应变-应力场,对典型地区地表形变结果进行地球动力学解释并进行地震危险性估计。
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The average heat production rate of the crust also exhibits lateral heterogeneity among geotectonic units, implyin...
中国大陆各构造单元的地壳生热率亦表现出横向非均匀性,这意味着各构造单元的地壳平均成分存在显著的横向变化。
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Bounding in eastern Fenghuang, similar to Te, the crustal thickness can also be divided into two sections: northwest high value section and southeast low value section, and there is roughly a positive correlation between crustal thickness and effective elastic thickness of the lithosphere, namely higher crustal thickness value corresponding to relatively higher Te value and lowerer crustal thickness value to relatively lower Te value, which reflects that the lithospheric strength is directly proportional to the crustal thickness in regional tectonic background.
以凤凰东为界,与Te值类似,地壳厚度也可以宏观分为南东低值段与北西高值段,地壳厚度大体上与Te值呈正相关关系,相应较大地壳厚度对应较高的Te值,较小地壳厚度对应较低的Te值,说明在大的区域构造背景下,岩石圈强度与地壳厚度成正比。
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However, relating to investigate the modes, courses and characteristics of the orogenetic process in Paleozoic and after orogenetic process, the cognitive divergence have still occurred.
通过对新疆北东部地区不同构造区带构造作用的方式、过程和特点的研究,确定:①南天山榆树沟高压麻粒岩地体的正变质原岩是一个基本完整的蛇绿岩套,其经历了俯冲至下地壳的高压麻粒岩相、构造抬升至深地壳麻粒岩相以及快速构造折返至角闪岩相的变质过程,代表了南天山洋壳俯冲、变质、随后折返的过程,并首次确定了变质过程的PTt轨迹;②奥陶纪末期中天山北缘发生洋盆俯冲、地体增生作用,此时萨日达拉地区处于岛弧活动带;中石炭世晚期中天山小型洋盆关闭,准噶尔地块与伊犁—中天山板块斜向对接随后发生脆韧性质近水平高温低速右行走滑剪切;③根据巴音沟地区不构成蛇绿岩套有效成分的硅质岩具有与活动大陆边缘密切相关的地球化学特征以及洋中脊玄武岩显示其岩浆源区受到消减带流体交代作用的影响,结合区域地质资料,首次提出巴音沟蛇绿岩带所代表的洋盆古构造环境为弧后盆地,并于早石炭世至中石炭世末期间,经历了扩张、收缩和闭合过程;④首次在克拉麦里蛇绿混杂岩带中分解出具有N-MORB、T-MORB与OIB三种不同类型的火山岩岩石组合,反映了洋盆俯冲
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In the upper crust the fast wave directions follow geological trends. In the low velocity zones of lower crust and uppermost mantle, remarkable anisotrpy depicts the large-scale horizontal flow around east Himalayan syntaxis.
在上地壳内,快波方向与地表构造形迹基本一致;在中下地壳和上地幔顶部低速层内,各向异性非常显著,表明围绕喜马拉雅东构造结发生大规模的水平向流动。
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Based on the regional tectonic evolution, combined with the high precision isotopic ages from this paper and other geologists, we have some new acquaintances as follows: 1 There has no Caledonian granite belt distributed in north margin of North China Craton. So, the traditional evolving model of North China Carton, which formed on this idea and the acquaintance about the collision of North China plate and Siberian plate, must be incorrect; 2 The age date show that the earliest magmatic activity began since late-Palaeozoic Permian, which is inconsistent with the previous idea that there were Caledonian and Hercynian active continental margin in the north of North China Craton and in the south Xingkai Massif. 3 the crust and lithosphere were thickened by the subduction and collision of Siberia plate and North China plate during Late Paleozoic. The magma is formed when the crust is heated and melts caused by thickened lithosphere delamination and caused the Asthenosphere upwelling. But only a little basaltic magma erupted, most magma underplate under the bottom of the crust. Thermal energy derived from basaltic magma underplating made the middle and lower crust melt partially and the late Permian-early Triassic granites is formed in large scale.
根据区域构造演化分析,并结合本文及他人高精度同位素年龄,我们对延边花岗岩形成的大地构造环境有了新的认识:1在华北地台北缘并不存在所谓的加里东花岗岩带,因此,建立在此之上的传统的华北地台北缘演化模式及有关西伯利亚板块与华北板块的碰撞拼合的认识也必然是不正确的;2华北地台北缘和兴凯地块南缘不存在加里东期和海西期花岗岩带,表明两地块边缘最早的花岗质岩浆活动始于晚古生代的二叠纪,即不存在传统观点所认为的加里东期或海西期活动陆缘;3晚古生代由于西伯利亚板块与华北板块的俯冲碰撞,致使地壳和岩石圈增厚,导致加厚岩石圈发生拆沉作用,使得软流圈上涌,加热地壳使之熔融形成岩浆,但玄武质岩浆少量喷出地表,大部分底侵于地壳底部,形成下地壳高密度的玄武质底侵层,玄武质岩浆底侵的热能引起中下地壳广泛部分熔融,形成大面积分布的晚二叠世—早三叠世花岗岩。
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Important significance of regional tectonic regime to metallogenic capacity of Indosinian and Early Yanshanian granites in southeastern Hunan:A case study of Qianlishan and Wangxianling plutons;2. Yanshanian movement and conversion of tectonic regime s in East Asia;3. The Sm-Nd isotopic results indicate that the Archean tectonic regime and crust growth in Northern China Platform can be divided into two stages.
Sm-Nd同位素研究结果显示,华北地台太古宙构造体制与地壳生长可分为二个发展阶段:2800Ma以前,地壳以幔源物质垂向增生为主;进入2800Ma以后,地壳物质开始进入地幔,并以水平运动为主要构造体制,反映板块构造机制在太古宙晚期地质演化中具有十分重要的作用。
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The strike of Huanghai block and Huaihai block in the east mainly tends towards north-east, while the strike of Shanxi block and the eastern edge of Ordos block in the west mainly tends towards north-west.(3) According to the feature of Moho, the crust of the research zone can be divided into six parts in the Shanxi block, Moho looks like a nearly north-south sunk belt, and the crust is thick; at the southern edge of the Inner Mongolia block and in the south of Yanshan block, Moho presents the structural features of fold belt, tending nearly towards east-west; at the eastern edge of Ordos block, the structure of Moho is relatively complex with nearly northwest folds.
3根据莫霍面的形态特征,研究区地壳可大致划分为6个区块;在山西地块范围内,莫霍面呈近南北向的凹陷带,地壳厚度大;内蒙古地块南缘和燕山地块南部,莫霍面表现出褶皱带的构造特征,其延展趋势为近东西方向;鄂尔多斯地块东缘,莫霍面构造相对复杂,呈近北西向凸、凹相伴的褶皱;黄淮海地块为莫霍面隆坳区,隆、坳相间排列,构造较复杂,但从整体上看,这是全区莫霍面最浅的隆起区段;鲁西台背斜主要为莫霍面断陷区,其断陷带沿枣庄-曲阜一线向北西方向延伸。
- 推荐网络例句
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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether
年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。
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Eph. 4:23 And that you be renewed in the spirit of your mind
弗四23 而在你们心思的灵里得以更新
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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.
老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。