In this paper, we mainly use plate subduction model to calculate and simulate some major subduction boundaries all over the world, and discuss the problem of the dip angle.

文中主要通過平板俯沖模型來計算模擬全球范圍內(nèi)一些大的俯沖邊界，并對俯沖角等問題作了一些討論一级黄色网址。

90Ma. The variance of dip angle of subduction slab was caused by the velocity change of subduction slab.

造成俯沖板塊傾角隨時間變大的主要原因是板塊俯沖速度減小92婬黄看大片。

The intra-continent subduction occurred under the influence of distant compressure of subduction and collision taking place between the Indian plate and the Eurasia plate in the Mesozoic-Cenozoic.

天山山系是中國西北地區(qū)的一個復(fù)合造山帶，中国产情侣作爱视频免费观看、新生代以來在印度板塊與歐亞板塊俯沖碰撞的遠(yuǎn)程擠壓效應(yīng)影向下亚洲开心色，發(fā)生了陸內(nèi)俯沖。

The age of adakitic dacite is about 514.2±8.5 Ma, and the age of eclogite from the northern margin of Qaidam basin is 494.6±6.5 Ma. Therefore, it is considered that the slab started its subduction in Late Cambrian, that the adakitic magma was formed at the subduction depth of about 75~85 km, and that the partial melting residues with garnet facies continued subducting and finally formed eclogite in Early Ordovician.

據(jù)其地球化學(xué)研究結(jié)果并結(jié)合該區(qū)埃達(dá)克質(zhì)英安巖(5 14.2± 8.5Ma)和榴輝巖(494.6± 6 国产口爆视频。5Ma)的年齡數(shù)據(jù)日韩欧美一区中文字母视频，推測柴北緣板片在晚寒武世開始俯沖，俯沖板片在 75～ 85km深處開始部分熔融形成埃達(dá)克質(zhì)巖漿免费网站看av片在线观看，而熔融殘留部分繼續(xù)俯沖在线看羞羞视频，在早奧陶世形成含石榴石殘留相的榴輝巖。

The higher subduction velocity advantages the low temperature in the subduction belt. In addition, it takes less time for the crust rock to subduct the deep and then return to shallow. The low temperature and the short time are benefit to forming and reserve the ultrahigh\|pressure metamorphic rocks.

板塊持續(xù)的高速俯沖欧美xxxx极品第一视角，不僅可以使得俯沖帶形成低溫環(huán)境久久久久久免费大片，而且在陸殼巖石俯沖到地幔經(jīng)受超高壓變質(zhì)作用后返回地表淺部的過程中，超高壓變質(zhì)巖在地幔滯留的時間短禁18在线免费观看网站软件，為超高壓變質(zhì)巖的形成提供了必要條件人人操人人爱人人摸人人看。

The authors believe that the diversification of rock zonation and lithology of these high pressure rocks can be attributed to the metasomatism that took place between deep melt and ultrabasic rocks in the subduction zone, and thus propose a hypothesis of subduction melt metasomatism to explain jadeite formation.

筆者認(rèn)為俯沖帶中形成的深部熔體與超基性巖之間的交代變質(zhì)是導(dǎo)致巖石分帶和巖性多樣化的根本原因，提出了俯沖帶熔體交代成因說中文字幕三级片，認(rèn)為俯沖帶欧洲一站免费视频、深部流體和超基性巖體是形成翡翠及其過渡品種的3個必要條件91尤物国产线观看免费，并因此指出在人工合成過程中引入流體相很可能是降低實驗條件的苛刻程度、從而合成出真正具有商業(yè)意義的翡翠的途徑www.色色。

With a dip angle between 15° and 30°, the uplift of an obducted plate during continental collision is much higher, and able to form a high mountain. The uplift is greatest with a dip angle of 15°; whereas with a dip angle between 30° and 45°, the subduction depth of a plate is much deeper, and able to form a deep basin. The subduction depth is greatest with a dip angle of 45°. When the dip angle is equal to or greater than 75°, subduction and obduction movements between two continents become undistinguishable.

當(dāng)斷裂帶傾角在15~30°時嗯啊慢点好疼，兩個大陸板塊碰撞導(dǎo)致的仰沖板塊一側(cè)隆升高度相對更大，利于形成高大的山脈最新欧美爆乳日韩精品视频，其中以15°傾角對應(yīng)的仰沖板塊一側(cè)隆升最高一级黄片婬片在线观看视频；當(dāng)斷裂帶傾角在30~45°時，兩個大陸板塊碰撞導(dǎo)致的俯沖板塊的俯沖深度相對更深污色视频在线观看，利于形成深陷的盆地欧美黄色一、二区性交，其中以45°傾角對應(yīng)的俯沖陸塊一側(cè)俯沖最深；當(dāng)斷裂帶傾角≥75°時一本在线香蕉高清在线，兩個大陸板塊之間的相對俯沖和仰沖作用變得不明顯北京熟女大叫喊爽视频。

The banded-augengranitic complex(476-413Ma) and charnokites (435Ma) in Yunkai upwelling area are formed in active continental margin Volcanic arc tectonic environment of subduction-collision in Caledonian and the augen granite and charnokiteare formed in the post-orogeny environment,and the intrusive gabbro(392Ma) are fromed in extensional environment of the end of Subduction-collision orogeny.

云開隆起區(qū)條帶-眼球狀花崗質(zhì)雜巖（467-413Ma）及紫蘇花崗巖（435Ma）形成于加里東期俯沖-碰撞活動大陸邊緣火山弧構(gòu)造環(huán)境，其中眼球狀花崗巖欧美强奸网站、紫蘇花崗巖形成于碰撞造山后環(huán)境91中文字幕国产，侵入輝長巖（392Ma）則是俯沖-碰撞造山作用階段結(jié)束伸展環(huán)境下的產(chǎn)物。

According to the variation in the components of intermediateacid igneous rocks coming from the lower crust, it is possible to restrain the depth of the source area and the minimum thickness of the crust, and thus to provide important information for the study of the deep process of the continental intraplate mineralizationGlobally, many world level porphyry copper deposits and metallogenic systems formed by hypabyssal hot liquid have their close relationship with the synchronous adakite in spacetime and genesis; domestically, the adakitelike rocks have been identified to be related to the metallogenesis in the main metallogenic areas in ChinaThe recognition of adakitelike rocks having no relationship with the process of subduction makes it possible to construct a metallogenic model of continental intraplate porphyry metal deposits by combining other geological evidences, and this model is totally different from the metallogenic model of porphyry copper deposits with Bsubduction setting constructed by Sillitoe (1972)The existence of adakitelike rocks may be the necessary condition but not the sufficient one for forming the largescale porphyry deposits and the hypabyssal hotliquid deposits, whose metallogenic elements mainly came from the mantleThe metallogenic potential of adakitelike rocks is achieved by the entering of the mantle material, and the metallogenic specialization of adakitelike rocks is decided by the distribution characteristics of the metallogenic elements in the upper mantleAn important reason for the adakitelike magma related to subduction being advantageous to mineralization is that there were abundant high pressure and high temperature liquid coming from the subducted platepieces and the magma of high fO2 coming from the melting of subducted platepiecesHowever, for those adakitelike rocks, whose occurrence has continental plate background but does not relate to the subduction, their metallogenic mechanism is not clear yetBased on the concept of modern mineral exploration and combined with the analysis of integrated geological information, we may better realize the practical prospecting significance of the adakitelike rocks

根據(jù)起源于下地殼的中酸性巖漿巖的成分變化A级黄色毛片免费看，可以約束其源區(qū)深度以及地殼最小厚度男女交性无遮挡在线观看，為大陸板內(nèi)成礦作用的深部過程研究提供重要信息。全球范圍內(nèi)免费A级毛片无码免費视频，許多世界級斑巖銅礦和淺成熱液礦化系統(tǒng)與同期的埃達(dá)克質(zhì)巖存在密切的時空與成因聯(lián)系精品国产欧美一区二区五十路，在國內(nèi)主要成礦區(qū)帶也識別出與金屬成礦作用有關(guān)的埃達(dá)克巖。與俯沖過程無關(guān)的埃達(dá)克質(zhì)巖的識別99久强奸久久9毛片，使我們有可能結(jié)合其他地質(zhì)證據(jù)構(gòu)建完全不同于Sillitoe(1972)B型俯沖環(huán)境的斑巖銅礦成礦模式的大陸板內(nèi)斑巖型金屬礦床成礦模式日韩性爱视频中文字幕。對于規(guī)模巨大、礦質(zhì)主要源自地幔的熱液礦床的形成另类日韩高清精品视频在线观看免费，埃達(dá)克巖可能是必要條件a级a片，但不是充分條件。埃達(dá)克巖的成礦潛力通過地幔物質(zhì)加入而獲取国产色网站农村，埃達(dá)克巖的成礦專屬性由上地幔成礦元素分布特征決定超碰人人免费人妻。與俯沖有關(guān)的埃達(dá)克質(zhì)巖漿之所以有利于成礦，重要的原因是存在大量來自俯沖板片的高壓国产每日、高溫流體以及俯沖板片熔融形成高氧逸度(fO2)的熔體在线A级网站，但產(chǎn)出在大陸板內(nèi)背景、與俯沖無關(guān)的埃達(dá)克巖的成礦機制還不清楚男人插女人b动态图。根據(jù)現(xiàn)代資源勘查理念一级欧美一级日韩α片，結(jié)合綜合地質(zhì)信息分析，埃達(dá)克質(zhì)巖具有實際找礦意義。

Pacific plate subduction was dominated in study area since late Jurassic, stress regime was then transited from compression into extension associated with the steepening of subduction angel and retreat of subduction zone ocean inward; due to the difference in basement properties, extensional rifting basins dominated by depression basins developed within the Yangtze block, while volcanic faulting bounded basins for the Cathaysia block, and a series of red faulting bounded basins with half graben shape for the areas within the boundary zone between these two blocks.

晚侏羅世以后亚洲音影先锋在线，太平洋板塊對研究區(qū)的影響占主導(dǎo)地位国产一级A片午夜无码免费视频，隨著俯沖角度的變陡和俯沖帶向洋的后撤，全區(qū)由擠壓為主轉(zhuǎn)變?yōu)橐岳瓘垶橹鞯膽?yīng)力環(huán)境99re6，由于基底屬性有所差異丝袜脚交一区二区免费看，在揚子地塊區(qū)域形成以拗陷盆地為主的伸展裂陷盆地，在華夏地塊區(qū)域形成了火山斷陷盆地A片在线视频免费看，而在兩大地塊邊界附近www.日韩免费，則形成了一系列半地塹式的紅色斷陷盆地。