俯冲

The basic view of the model that the intense subduction of the Indian plate beneath tbe Eurasian plate would result in inhomogeneity of the fabric and deformation of the lithosphere and repeated alternations of normal transformation from collision to contraction to stretching and reverse transformation from stretching to contraction.

其基本观点是强调由于印度板块向欧亚板块的强烈俯冲造成岩石圈组构和变形的不均一性及岩石圈中存在的碰撞→收缩→伸展的正向转变和由伸展→收缩的逆向转变的反复交替。

New available geological and geochemical data of volcanic rocks indicate the coexistence of an islandarc system in the Gangdese and an extensional setting in the Himalayas during the Early to Middle Permian. Peraluminous Stype granites near Pikang (~263 Ma), the Songdo eclogite of the same metamorphic age (~262 Ma), and the regional angular unconformity between the Middle and the Upper Permian from the same geotectonic location suggest that the presentday Gangdese Retroarc Uplift Belt experienced a syncollisional orogeny at the latest Middle Permian (~263 Ma).

新的地质和地球化学资料显示早-中二叠世时俯冲背景和伸展背景共存于现今的冈底斯带和喜马拉雅带，中二叠世末期(大约263 Ma)侵位的皮康过铝质S型花岗岩以及同期发生的松多榴辉岩的高压变质作用和区域性角度不整合指示现今的冈底斯弧背断隆带在那时经历了同碰撞造山事件。

Its main aims include:(1) understanding the magmatic processes of the volcanic rocks and their petrogeneses;(2) discussing the possible enrichment processes induced by subduction of continental slab;(3) providing geochemical constraints on the nature of lithosphere (including the subcontinental lithospheric mantle and lower crust) of the different tectonic units confined by the major faults across the belt; and (4) geochemical comparison of the lithosphere in an attempt to define the possible boundary between the North China and Yangtze Blocks during Mesozoic time.

中文摘要：项目开展了穿越苏鲁造山带南北向晚中生代火山岩及相关火成岩的廊带剖面(包括苏鲁带的胶东、青岛、滁州和下扬子地区的溧水盆地)的地球化学研究，理解各区块晚中生代岩浆作用过程和成因，探索大陆俯冲作用的地幔富集过程以认知各主要断裂围限地区的岩石圈性质；通过对比不同地区的岩石圈性质来限定苏鲁地区华北与扬子陆块的中生代碰撞边界。

Firstly, based on the distribution of global earthquakes and their kinematic and dynamic characteristics, the most active global-scale tectonics can be divided into three first-order tectonic system: the circum-Pacific deep subduction tectonic system, which is the region that oceanic lithosphere subduct under continental lithosphere; the mid-oceanic ridge tectonic system, where the joint tectonics of rift valleys and transform faults distribute widely; and the continent-continent shallow underthrusting tectonic system, where the different kinds of continental faults affect each other.

其中，环太平洋构造系以大洋岩石圈向大陆岩石圈俯冲为构造特征；大洋中脊构造系以大洋岩石圈内裂谷-转换断层的组合构造为特征；大陆构造系则以大陆岩石圈的边缘和内部各种断裂的相互作用为特征。

This is called a subduction zone.

这被称为俯冲带。

It is believed that thermal and isostatic activity related to the subduction zone caused this differential vertical uplift and subsidence.

据认为，热等静压和相关活动的板块俯冲带造成这一差别的垂直抬升和沉降。

In particular, 373 selected deep earthquakes are believed to play an important role in increasing the reliability of inversion for upper mantle and subduction zone.

尤其是，所数据中的373个深源地震对提高上地幔和俯冲带反演结果的可靠性起到重要的作用。

In Cenozoic typical back-arc rift basins are formed in NE China where is the back-arc area of pacific plate subduction zone.

新生代，东北地区作为太平洋板块俯冲带的弧后地区，形成了典型的弧后裂谷盆地。

It provides us an opportunity to make a systematic study on distribution of REE-bearing accessory minerals in continental subduction zone.

中国大陆超深钻主孔从100米到3000米切穿含柯石英榴辉岩，为系统研究大陆深俯冲过程中含稀土元素副矿物提供了机会。

In all, slippage during the Dec. 26 quake occurred along a 1,200-to-1,300-km-long stretch of the two plates' intersection, or subduction zone.

总之，延误在12月26日发生的地震，沿着1200 - 1多功能公里长的河段两个板块的交汇，或俯冲带。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。