俯冲

During these events, the potassic volcanic rocks of Oulituozi were produced during extension stage of the rift with subsequent fractional crystallization and derived from basaltic magma.

欧利坨子富钾质火山岩的形成是裂谷期岩石圈伸展作用的产物，是玄武质岩浆经过大比例分离结晶作用的产物，可能与晚中生代太平洋板块俯冲残片的部分熔融有密切关系。

During these events, the potassic volcanic rocks of Oulituozi were produced during extension stage of the rift with subsequent fractional crystallization and derived from basaltic magma. The genesis of the volcanic rocks possibly had a close relation with partial melting of the subducted slab of Pacific Plate oceanic crust.

欧利坨子富钾质火山岩的形成是裂谷期岩石圈伸展作用的产物，是玄武质岩浆经过大比例分离结晶作用的产物，可能与晚中生代太平洋板块俯冲残片的部分熔融有密切关系。

The metal elements of the volcanic-hosted massive sulfide deposit have two sources, the copper and zinc are derived from rhyolitic magmas whereas the lead are probably related to old sediments overlying the rhyolites.(4) It is suggested here that the volcanic rocks hosting massive sulfide deposit in the north Qilian orogen, which are previously considered as a bimodal suite of Neo-proterozoic to middle Cambrian age in a continental rift, are virtually related to subduction magmatism in Ordovician age, and there might have no continental rift magmatism of Neo-proterozoic to middle Cambrian in the north Qilian.

Th/Ta比高(5.0～11.7)，εNd为较大的负值(-2.6～-8.4)，流纹岩的形成可能是两个端元组分混合的过程、或是上地壳混染的结果，形成在活动陆缘环境；(3)北祁连块状硫化物矿床成矿金属物质具有两种来源，Cu、Zn等来源于流纹岩，而Pb的来源可能与古老沉积物有关；(4)本文认为，前人厘定的北祁连新元古代-中寒武纪赋存块状硫化物矿床的大陆裂谷双峰式火山岩应是与俯冲作用有关的奥陶纪火山岩，说明北祁连可能不存在新元古代-中寒武纪的大陆裂谷活动。

I-type granite occurs on north of HongliugouLapeiquan Fault, its chemical composition is similar to that of trondhjemite arisen by Barker (1979), maybe also a product of subduction and collision of oceanic basin in early Paleozoic.

根据SiO〓-Al〓O〓和SiO〓-FeO〓/图解判别显示造山后花岗岩的特征；后者分布在红柳沟—拉配泉断裂以北，其成分与巴克尔1979年提出的奥长花岗岩的成分非常相似，也可能是区内早古生代洋盆俯冲碰撞的产物。

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。

Sulu UHP eclogites are products of collision between South and North blocks. Subduction-exhumationof volumetrically continental materials gave rise to formation of diverse UHP metamorphic rocks, and simultaneously titanium mineralization with rutile as principle ore mineral.

苏鲁地区超高压榴辉岩是华南-华北板块碰撞的结果，巨量陆壳物质俯冲-折返形成了多样式的高压-超高压岩石，与此同时也发生了以金红石为主要矿石矿物的钛成矿作用。

The difference between MORS- and SSZ-type ophiolites in terms of igneous petrotectonic assemblages is discussed.

探讨了识别洋中脊扩张型和洋俯冲带上面蛇绿岩在火成岩组合上的差别。

And so far, the only consequence of that particular plunge is love.

到目前为止，这一次&特殊的俯冲&唯一的果实就是爱。

For improving the survivability of the guided weapons in target district,aggrandizing its damaging power to target,and to satisfy the demand of the actual military tactics,the guided weapon must attack targets in the desired impact angle,thus the problem of homing guidance with impact angle constraints is put forward.

为提高制导武器在目标区域的生存能力，增大对目标的杀伤威力，以及实际战术应用的需要，需要武器按期望的方位角、俯冲角对目标实施攻击，因此提出了带有碰撞角约束的导引问题。

Its swooping form, which suggests two boomerangs placed side by side, has been compared to a dragon.

它的形状好比一个俯冲下去的龙，两个飞去来器形状的建筑支撑着。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐