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tectonic thickening
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  构造加厚
     (2) crustal tectonic thickening based on evidence from contractional deformation, igneous rock assemblages and lower crustal xenoliths;
     (2)收缩构造变形、火成岩构造组合和下地壳岩石捕虏体3个独立证据提出陆壳的构造加厚;
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  相似匹配句对
     Criticize and Tectonic
     批判与建构
短句来源
     and tectonic movement.
     (3)与深部地质作用有关;
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     Thickening cosmetic formula
     如何增稠化妆品配方
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     THE THICKENING OF VINYLESTER RESIN
     乙烯基树脂的增稠
短句来源
     "Crust Thickening" and "Continent Escape" are two most important ones among the models on continental tectonic deformation.
     “地壳增厚”和“大陆逃逸”假说是长期以来关于大陆内部变形的最主要的两种观点。
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  tectonic thickening
The recorded kinematic indicators suggest that early subhorizontal compressional tectonics gave rise to tectonic thickening of the crust, progressively followed by oblique transcurrent shearing within a transpressional regime.
      
The process is justified within the scope of a model for the tectonic thickening of the crust via rapid thrusting and subsequent rapid exhumation and erosion.
      
This supports the fact that tectonic thickening cannot explain all the observed elevation, and also precludes crustal thickening by magmatic addition.
      
Tectonic thickening of the crust can be assumed to conserve volume locally.
      


The study of intracontinental deformation is an important field of Continental Dynamics. The characteristics of deep crust level intracontinental deformation used to be difficult to obtain.The Smugou transpressional shear zone provides a typical example.As a primary part of the large granulite facies zone in the northern edge of the North China platform ,the Jianping metamorphic complex area is divided into S area and N area by the Semugou transpressional shear zone based on metamorphism,deformation,rock assemblages,mineral...

The study of intracontinental deformation is an important field of Continental Dynamics. The characteristics of deep crust level intracontinental deformation used to be difficult to obtain.The Smugou transpressional shear zone provides a typical example.As a primary part of the large granulite facies zone in the northern edge of the North China platform ,the Jianping metamorphic complex area is divided into S area and N area by the Semugou transpressional shear zone based on metamorphism,deformation,rock assemblages,mineral assemblages,and magmatism. S area is composed of the charnocikitic gneiss and the upper rocks reworked by granulite facies metamorphism,wheres N area is composed of TTG series which has undergone the ambhibolite facies metamorphism and the ductile deformation. Several conclusions can be dervied form detail studies including field works,petrology,petrochemistry,fabric analysis,and structural analysis:(1)The Semugou transpressional shear zone is a lateral and thrusting ductile zone.It occured not only in the lower crust(720℃,0.86GPa;)but also in the middle upper crust(less than 550℃ and 0.6GPa). From south to north in the Jianping metamorphism rock complex area,the crustal depth indicated by the character of the metamorphic and deformional rocks is increasing.(2) According to the age and the distribution in relation to the Semugou transpressional shear zone,the Sanzuomiao intrusive sequence is syntectonic.Being compositionally expanded granitic melts that rise up in the shear zone, the syntectonic Sanzuomiao intrusive sequence indicates that the Semugou transpressional shear zone reached the boundary between crust and mantle.The Sanzuomiao instrusive Sequence resulted from melting of crust mantle mixed layers due to the Semugou transpressional shear zone. (3) The Semugou transpressional shear zone is produced by tectonic thickening and uplifting and can be used as the evidence of Proterozic intracontinental deformation of the Jianping metamorphic complex area. (4) Comparing to Pan-scandamerican event recorded by many ancient continental shield and the characteristics of young orogenic belt ,the activity of the Semugou transpressional shear zone is an adjustment of the Jianping metamorphic complex area to adopt stress and deformation of the ancient continental margin.

建平变质杂岩区被色木沟剪切带划分为南(S区)北(N区)两个构造-岩性单元。剪切带的运动学、岩石学研究和变形组构分析都表明右行走滑-逆冲性质的色木沟剪切带,发育有自下地壳(720℃,0.86GPa)到中、浅地壳(<550℃,<0.6GPa)不同地壳层次的变形作用。三座庙侵入岩序列是色木沟剪切带的同变形岩浆岩,指示该剪切带波及的岩石圈深度可能已经达到了壳幔边界(壳-幔混合层),从而具有复杂的成分特点。色木沟剪切带是建平变质杂岩区克拉通化后古陆块在构造增厚抬升过程中发生陆内变形的实例,它可能是在1800-1900Ma间与Laurentia超大陆有关的Pan-Scandamerican事件的记录。

The region studied lies in the northern segment of Helan Mountain, which is located at the western margin of the North Chlna Platform. The khondalite series is widespread in the Zong-bieli area. Four tectono-deformational episodes in two stages and six metamorphic episodes in three stages are recognized in the khondalite series. The first deformational episode in the early stage in the extentional environment was the bedding shear deformation- resulting in a series of tectonic patterns such as blasto-plastic...

The region studied lies in the northern segment of Helan Mountain, which is located at the western margin of the North Chlna Platform. The khondalite series is widespread in the Zong-bieli area. Four tectono-deformational episodes in two stages and six metamorphic episodes in three stages are recognized in the khondalite series. The first deformational episode in the early stage in the extentional environment was the bedding shear deformation- resulting in a series of tectonic patterns such as blasto-plastic deformational and interlayer recumbent folds- ln the later stage the second, third and fourth deformational episodes occurred in the shortening environment.ln the second deformatlonal episode were formed EW giant recumbent folds (D21 ) and NW broad folds (D22) based on the former. In the third deformatlonal episode were formed NE tight lsoclinal folds (D31 ), of which the axial planes are deeply plunglng and the NE high temperature plastic shear zone (D32 ), which brought ahout the tectonic framework of the northern segment of Helan Mountain. In the fourth deformational episode were formed the giant plastic shear helts related to the emplacement of granite bod1es- The evolution of metamorphism involved six episodes in three stages. In the early stage of prograde metamorphism (M1 - M2 ), the typical equilibrium assem-blage of M1 episode is Bi+Pl+Qz which was left in the center of garnet; M, episode is character-ized by an assemblage of Ky+(;t+Bi+Mus+Pl+Qz, which was left in the intercalation of minor two-mica schist; at the peak temperature of the metamorphism stage (M3 - M4 ), the characteristic mineral assemhlages of M, episode are Sil +Gt +Cord+Bi+Kf+Pl+Qz in Al-rich gneiss and Opx +Cpx±Bi + Pl +Qz, Opx+ Bi +Gt + Pl + Qz in minor granulite, reaching granulite facles; in the M4 episode the react1on of Bi-Sil + Melt widely occurred, and it is related to the dehydrational anatexis of khondalite. At the post-peak metamorphic and later stages (M5-M6), M5 episode was related to the formation of strongly deformed belt (D4 ), as ls evidenced hy the metamorphic reac- tions: Gt +Sil+Qz+H2O-Cord and Sil-And, equal to low-pressure amphlbolite facles; and the late low-tenlperature stage (M6) is characterized by the reaction of Sil-Mus. On the basls of the mineral paragenesis and geothermoubarometric estimates, the clockwise p-T-t-D path similar to the pattern of collislon orogenic belt is determined and it was caused by tectonic thickening.

通过对贺兰山北段孔兹岩系宏观及微观构造和典型变质矿物的详细研究,识别出该区曾经历了两个阶段四幕变形作用和三个阶段六幕变质作用,并结合矿物温历的估算,建立了该区变质作用演化的顺时针p-T-t-D轨迹,其反映本区孔兹岩系形成于陆陆碰撞的造山环境中,构造增厚作用是其发生的诱因。

The detailed study of metamorphism from the original North Jingangku Formation of the Wutai Group indicates three metamorphic evolutionary stages: initial tectonic burial metamorphism (M1) probably related to collision between island arc and continent, subsequent high pressure metamorphism (M2) extending 0.8~1.4GPa down to a depth of 42km from the peak metamorphism in response to crustal tectonic thickening, and isothermal decompression process (M3) as a result of rapid exhumation. A clockwise P T...

The detailed study of metamorphism from the original North Jingangku Formation of the Wutai Group indicates three metamorphic evolutionary stages: initial tectonic burial metamorphism (M1) probably related to collision between island arc and continent, subsequent high pressure metamorphism (M2) extending 0.8~1.4GPa down to a depth of 42km from the peak metamorphism in response to crustal tectonic thickening, and isothermal decompression process (M3) as a result of rapid exhumation. A clockwise P T evolutionary path is similar to the P T t path of the typical orogenic belt.

根据对原五台群北金岗库组变质作用的深入研究 ,表明它们经历了三期变质作用 ,即经历了弧陆碰撞导致的初始的构造埋藏变质作用 (M1)以及随后深埋到 42 km深度的峰期高压变质作用 (M2 ) ,压力可达 0 .8~ 1.4GPa,随后经历了快速抬升所导致的近等温的降压过程 (M3)到 0 .5~ 0 .7GPa,整个过程为顺时针方向演化的 P- T轨迹 ,与造山带型 P- T- t轨迹型式相同

 
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