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地幔活动
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  mantle activity
     The features and distributions of some gold deposits in the crust of Qinling don't coincide with the process of crustal evolution, but are in close relationship with deep geological process,particularly mantle activity.
     秦岭地壳中一些金矿床其特征及分布与地壳演化过程不协调,而与深部地质过程,特别是地幔活动密切相关。
短句来源
     The mantle peridotites widely distributed along the Yarlung Zangbo River ophiolite zone are fresh rocks not subjected to serpentinization. Therefore, the observation under microscope and the whole rock chemical analysis are simple and convenient means for investigating their genesis and the mantle activity.
     广泛分布在雅鲁藏布江蛇绿岩带的地幔橄榄岩是没有蛇纹石化的新鲜岩石,因而通过显微镜下观察和全岩化学分析探索其成因和地幔活动,是十分有利和简便的。
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     The geochemical characteristics of the phosphate concretions indicate that the depositional environments of the two horizons of phosphate concretions are different: the base of the Fengtai Formation formed in a marine environment with relatively strong mantle activity, while the middle part formed in a closed environment with relatively weak mantle activity.
     凤台组底部与中部磷结核的地球化学特征分析表明,2个层位磷结核的沉积构造环境存在差异,凤台组底部形成于地幔活动较强的海相环境,而中部形成于地幔活动性较弱的闭塞环境。
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  “地幔活动”译为未确定词的双语例句
     MANTLE PLUME AND GOLD MINERALIZATION OF SOUTHEAST JILIN PROVINCE
     吉林东南部地幔活动与金的成矿作用
短句来源
     THE UPPER MANTLE ACTIVATION IN SOUTH CHINA SEA AND THE INDOSINIAN MANTLE PLUME
     南海区域的上地幔活动特征及印支地幔柱
短句来源
     A NUMERICAL MODELING STUDY ON THE “ASTHENOSPHERE UPWELLING” OF SOUTH CHINA SEA
     地幔活动在南海扩张中的作用数值模拟与讨论
短句来源
     Main metallogenic mechanisms for Cu(Ag)deposits are the Earth's crust evolution,the mantle movement,the dis-trbution,superposition and reformation of source bed.
     且地洼区的地壳演化、地幔活动、矿源层(岩)的广布、叠加、改造矿化则是形成富铜(银)矿床的主要机制。
短句来源
     and how to evaluate such a behavior? Our results indicate that asthenosphere upwelling is much more efficient for the lithospheric thinning in the upper mantle but is still inefficient for crust thinning.
     本文采用数值模拟方法对地幔活动在南海扩张中的作用和影响进行了考查,结果表明:地幔上涌作用能引起南海岩石圈很大程度的减薄,但对南海地壳减薄影响很小;
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  相似匹配句对
     Activities
     活动
短句来源
     (3) difference in activity of mantle plume;
     (3)地幔活动差异;
短句来源
     Thermal activity in the mantle is less important than that in the crust.
     地幔活动比预期要差;
短句来源
     The activity of the nerve fibers
     神经纤维的活动
短句来源
     MANTLE METASOMATISM
     地幔交代作用
短句来源
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  mantle activity
It has been shown that mantle processes become more intense during periods of the synchronous activation of endogenic events in both shells; mantle activity sharply decreases in the epochs when endogenic processes in these shells are waning.
      
This difference may serve as an objective criterion for estimating the maximum duration of cycles of mantle activity, which is distinct in the Early-Middle Archean, Late Archean-Proterozoic, and Phanerozoic.
      
It is argued that African volcanic activity is related to linear, rather than circumscribed, areas of mantle activity.
      
Hot mantle activity, crustal roots, isostasy, and late-stage extensive lithosphere thickening together with volcanic building have been in combined response to the high-elevated Tharsis bulge.
      
A preponderance of evidence suggests that ocean chemistry responds to long-term changes in mantle activity.
      


Three stages, geosynclinal, platform and diwa, can be singled out in the history of tectonic development of North Xinjiang, Based on the differences in development history and tectonic features, the study area can be divided into three tectonic regions, the Altay, Junggar and Tianshan diwa regions. They were transformed from a post-Hercynian pla- tform.Three factors have controlled the generation and evolution of the diwa regions in North Xinjiang: (1) Inhomogeneity in crustal structure. There is a relatively...

Three stages, geosynclinal, platform and diwa, can be singled out in the history of tectonic development of North Xinjiang, Based on the differences in development history and tectonic features, the study area can be divided into three tectonic regions, the Altay, Junggar and Tianshan diwa regions. They were transformed from a post-Hercynian pla- tform.Three factors have controlled the generation and evolution of the diwa regions in North Xinjiang: (1) Inhomogeneity in crustal structure. There is a relatively thin but "stable" Precambrian rigid basement in central North Xinjiang, which is surrounded by thick but weak ancient Hercynian geosynclinal fold belts. Such an inhomogeneity in crustal structure played an decisive role in the generation and evolutionof the diwa regions. (2) Existence and pattern of a "crust-mantle mix-melted layer". This layer is closely related to mantle activity. Its existence has exerted an important influence on tectonism and magmatism in North Xinjiang. (3) Mutual pressure of neighbouring crustal blocks in North Xinjiang. Lateral compression caused by crustal expansion and impedance or active compression of neighbouring crustal blocks have resulted in various folds and fractures and tectonic systems composed of them.The structures formed in North Xinjiang since Early Pleistocene time have resulted from the strong crustal expansion of the Tianshan diwa region and the compression, in a varying degree, of crustal blocks from south and north.

北疆可划分为三个各具不同特征的大地构造发展阶段,即地槽阶段、地台阶段和地洼阶段。根据地质发展史和构造特征的不同,本区现阶段可划分为三个构造区,即阿尔泰地洼区、准噶尔地洼区和天山地洼区。它们是由后海西地台转化而来的地洼区。 控制北疆各地洼区的形成演化的重要因素,一是地壳结构的不均一性:北疆中部存在厚度相对较小,但较为“稳定”的前寒武纪刚性基底,其周围存在厚度大、但较软弱的海西古地槽褶皱带,它对本区地洼区的形成演化起决定作用;二是“壳幔混熔层”的存在和分布状况:“壳幔混熔层”与地幔活动紧密相关,它的存在对北疆地壳运动和岩浆作用有重大影响;三是北疆各相邻壳体的相对推挤作用。由于地壳膨胀造成侧向的挤压作用,加上相邻壳体的阻挡作用或主动的挤压作用,致形成各种褶皱和断裂及由其组成的各种构造系。 北疆早更新世以来所形成的构造,主要是由于天山地洼区地壳的急激膨胀和来自南北方壳体不同程度的挤压作用所造成。

This paper sums up preliminarily the basic geotectouic characteristics of North Xinjiang as fellows:(1) The geosyncline-platform-diwa (geodepression) evolution history is different in the Altay, Junggar and Tianshan regions and the development inhomogeneity of these crustal blocks is remarkable.(2) The Precambrian rigid basement plays an important role in the regional tectonics of North Xinjiang and the generation and evolution of the Junggar basin.(3) The generation and evolution of the diwa regions in North...

This paper sums up preliminarily the basic geotectouic characteristics of North Xinjiang as fellows:(1) The geosyncline-platform-diwa (geodepression) evolution history is different in the Altay, Junggar and Tianshan regions and the development inhomogeneity of these crustal blocks is remarkable.(2) The Precambrian rigid basement plays an important role in the regional tectonics of North Xinjiang and the generation and evolution of the Junggar basin.(3) The generation and evolution of the diwa regions in North Xinjiang are closely related to the crustal structure and the upper mantle actitity, and inhomogeneity in crustal structure, existence of a "crust-mantle mix-melted layer" and mutual pressure of neighbouring blocks are three controlling factors.

对新疆北部大地构造演化的基本特征,作了初步总结。它们是:①阿尔太、准噶尔和天山地区,各自经历有不同时限的地槽、地台和地洼演化阶段,壳体间发展演化的不平衡性突出;②准噶尔前塞武纪刚性基底,对北疆区域构造、及准噶尔盆地的形成和演化,起着重要作用;③北疆各地洼区的形成和发展,与该区地壳结构特点和上地幔的活动密切有关。地壳结构的不均一性;“幔壳混熔层”的存在;各相邻壳本的相互作用;是三个主要的控制因素。

Tonggutang Cu(Ag)deposit,a blind deposit, developed mainly during Diwa period,with complicated control ore factors,mult sources of substances,mult geneses,mult period and stage metallogeny, should belong to Diwa polgenetic compoundore deposits. Main metallogenic mechanisms for Cu(Ag)deposits are the Earth's crust evolution,the mantle movement,the dis-trbution,superposition and reformation of source bed.

铜鼓塘铜(银)矿床是一个隐伏富矿。主要形成于地洼期。具有控矿因素复杂、物质来源多、成因类型多、多期多阶段成矿等特征,应属地洼型多因复成矿床;且地洼区的地壳演化、地幔活动、矿源层(岩)的广布、叠加、改造矿化则是形成富铜(银)矿床的主要机制。

 
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