查询词典 subduction

With the constraints from published paleopmagnetic data on motion rates of continental blocks prior to their collision, this work firstly proposed the ultra-fast subduction rate could assist the underthrust of low-density continental crust into mantle depth to some extents.

在综合古地磁和地球物理资料的基础上，本文首次提出快速俯冲过程是一种驱动陆壳进行俯冲的因素，在超高压变质带的形成过程中，快速俯冲过程可能起到了某种程度的驱动作用。

When the dip angle is equal to or greater than75°, subduction and obduction movements between two continents become undistinguishable.

当断裂带倾角≥5°，两个大陆板块之间的相对俯冲和仰冲作用变得不明显。

There are high-velocity density layers in the lower crust, which would be represent crust-mantle mixing layer formed by mantle material upwell The model of lithosphere subduction and underplating of mafic magma is supported by all geophysic data

在下地壳下部存在高速致密物质层，可能代表了上地幔物质上涌形成的壳-幔混合层，上述地球物理资料均支持岩石圈消减作用和玄武岩浆底侵作用。

This study shows that there are 4 kinds of volcanic facies in deep volcanics in north Songliao Basin: eruptive facies, overflow facies, volcanic vent facies and volcanic sedimentary facies. There are 4 volcanic eruption cycles: Huoshiling period, Shahezi period, Yingchengzi period and Quantou period. There are 4 structural evolution stages: north-south accumulation, west-east subduction, uplift mantle and thin crust, alternative open and close. There are 4 kinds of pool-forming patterns:(1) pattern with the migration along the unconformity and fault to the near crater;(2) pattern with the migration along unconformity and fault to the rift margin;(3) pattern with the migration along unconformity, fault and fracture to the source rock;(4) pattern with the migration of the deep gas along the deep and large fault to the volcanic trap.

研究认为，松辽盆地北部深层火山岩主要存在四种火山岩相：即爆发相、溢流相、火山通道相、火山沉积相，划分为四个火山喷发旋回：即火石岭期、沙河子期、营城子期、泉头期，经历了四个构造演化过程：即南北夹攻、东西俯冲、幔隆壳薄、开合交替，具有四种成藏模式：即沿不整合面和断层运移至近火山口处火山岩圈闭聚集成藏模式、沿不整合面和断层砂岩疏导层运移至断陷边部火山岩圈闭聚集成藏模式、沿不整合面及断层、裂缝运移至源岩区内凹中隆火山岩圈闭聚集成藏模式、深部无机成因天然气沿深大断裂运移至火山岩圈闭聚集成藏模式。

Direct observations and measurements on deformational and sedimentary structures, fluid activities, physical properties, and chemical compositions of core samples from accretionary prisms at different pressure and temperature settings are critical to understanding seismogenic mechanisms of subduction zone earthquakes.

对增生楔不同压力-温度条件下的构造变形、流体活动、沉积特征、岩石物性和化学组成等多方面的直接观测，可以帮助分析俯冲带地震的蕴育和发生的环境与机理。

In addition, the features of elemental geochemistry of all samples suggest that (1) the EarlyTriassic andesitic rocks, characterized by characteristic natures of island arc volcanics, likely erupted in the subduction setting; that (2) the generation of LateTriassic rhyolites with an affinity of Alike granite and synchronously main body granites in the Lincang batholith displaying similar geochemical features, is closely related with the postcollision or latecollision setting; that (3) although the LateTriassic basic rocks partly show island arc volcanics such as highAl contents and NbTa depletion, some of them possessing highMg contents and mostly having traceelement ratios similar to intraplate basalt, which indicates that they erupted in the postcollision rift environment.

元素地球化学特征表明，早三叠世火山岩具有典型的岛弧火山岩的特征，暗示其很可能形成于俯冲的构造环境；中三叠世晚期的流纹岩与临沧花岗岩基主体具有非常相似的地球化学特征，结合其流纹岩具有A型花岗岩属性，表明该区中三叠世火成岩形成于碰撞后的构造背景；而晚三叠世基性火山岩虽然在地球化学特征上显示出与岛弧火山岩相似的高铝和NbTa的亏损，但其中部分火山岩具有高镁和板内玄武岩的微量元素比值特征，说明这些火山岩可能形成于碰撞后裂谷环境。

Ma,and lithosphere delamination and thermal exhumation during 196～163?Ma.The rapid thermal exhumation,co\|occurred with extensive regional metamorphism and intermediate\|acidic magmatism,implied that the subducted slabs had broken off and delaminated.The p T t path of UHPM consists of two curves,i.e.,a barrette\|like curve reflecting the process of cold slab subduction and exhumation,and a crescent curve representing the thermal exhumation after slab breakoff.

通过全面评述该区变质岩研究成果，作者认为：超高压变质岩的形成和剥露经历了240～200 Ma的板片冷俯冲冷折返和196～163 Ma的岩石圈拆沉热折返；热折返伴随了广泛而强烈的区域变质作用和中酸性岩浆活动，指示板片断离拆沉的发生；超高压变质岩p-T-t轨迹由两部分组成，即反映板片冷俯冲冷折返过程的发夹状曲线和指示板片断离拆沉热折返过程的新月形曲线。

The structural features of the Cenozoic contractional deformation in the transition belt between Kuche depression and southern Tianshan uplift have been revealed by geological outcrop, seismic data, welllog and CEMP(Continuous Electromagnetic Profile)data; it is found that these features are difficult to be interpreted by the typical "Atype" subduction model. This article advances a "nonsubduction" contractional deformation model, i.e., the "delaminating contraction and vertically stacking" model.

用地面露头、地震和CEMP勘探资料揭示的库车坳陷-南天山盆山过渡带构造变形特征难以用经典的&A型俯冲&冲断褶皱楔变形模型来解释，因而文中提出一种&分层变形、垂向叠置&的&非俯冲&收缩构造解释模型。

The distribution characteristic of igneous rocks is similar to the magmatic activity in Cordilleran orogen, it is caused by variance of dip angle of subduction slab from 10～20° in Ca.

这种火成岩随时间的带状迁移特征与北美西部科迪勒拉造山带火成活动特征相似，它们都是俯冲板块倾角变化导致岩浆弧迁移形成的。

This provides an evidence for discrimination and epoch of syn-orogenic granitoid, and also serves as a new chronological restriction for the subduction-orogeny of Altay orogen in Eopaleozoic (Ordovician-Devonian).

这为阿尔泰造山带的同造山花岗岩的鉴别和时代确定提供一个证据，也为阿尔泰造山带在早古生代的俯冲造山提供了一个新的年代学制约。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。