subduction 中文意思是什麼

Chagan sag is a secondary tectonic unit in chagandelesu depression, northeastern yingen - eji ' naqi basin, and the basement of the basin is a paleozoic fold belt of continental margin or island arc at the connection region of north china plate * tarim plate and kazakstan plate, with the character of erogenic belt. in working area and its adjacent area, the forming tectonic setting of indosinian intrusion was that orogenic belt pressed strongly, intracontinental subduction ; that of early yanshan movement epoch was the stress field transferred from compression to extension meanwhile the incrassate crust of orogenic zone turned to extensional collapse ; and that of early cretaceous volcanics was that the area structure extensional collapse further more during the post period of orogenic phase

查干凹陷屬于銀根?額濟納旗盆地東北端查干德勒蘇坳陷內的一個次級構造單元，其盆地基底為古生代時期華北板塊、哈薩克斯坦板塊和塔里木板塊交接部位形成的陸緣或島弧褶皺帶，具有古生代造山帶的性質。研究區及鄰區印支期侵入巖形成於造山帶強烈擠壓陸內俯沖的構造環境；燕山早期侵入巖形成於由擠壓轉向拉伸、造山帶的增厚陸殼開始發生伸展垮塌的構造環境；早白堊世火山巖形成於造山期后進一步發生伸展垮塌的區域構造環境。

In this case during paleozoic, nearly east west trending arc structures resulted from the interaction between china plate and siberian plate. in mesozoic the westward subduction of kula - pacific plate under the china continental plate resulted in the nne and ne trend structures ( duimadao fault, diaoyudao fault, okinawa fault, uplifts belts and subsidence belts ) as well as volcano - magmatic belts in eastern of china plate

本文所涉及近東西向展布的弧形構造形成於古生代時期中國板塊與西伯利亞板塊的碰撞帶，而在中生代，中國板塊下的kula - pacific板塊向西俯沖導致了北北東向和北東向構造（如duimadao斷層、 diaoyudao斷層、 okinawa斷層、隆起帶和沉降帶）以及位於中國板塊東部的火山巖漿帶。

Thus, the paper focuses on mineralogy, petrology, petrogeochemistry, isotopic chorology, and sr - nd - pb isotopes of the mafic intrusions and dikes in fujian province, se china. in addition, we also discussed the process of the plate subduction, mantle evolution, crust - mantle interaction, lithospheric thinning and extension, and the reaction for crustal extensi on in fujian province, se china. ( 1 ) daiqianshan mafic intrusion is situated along the changle - nanao fault, which intruded in the metamorphic rocks

基於此，本文以中國東南部福建省的基性脈巖、巖體為研究對象，運用系統的礦物學、巖石學、巖石地球化學、同位素地球化學及同位素年代學證據，詳細論述了晚中生代中國東南部板塊俯沖、地幔演化、殼幔相互作用及巖石圈伸展減薄的地球動力學過程，探討了地殼拉張期次在福建省區域構造上的響應。

Secondly, based on the microbeam analytical technique, on the one hand, through investigating the characteristic of major elements in the mantle minerals the author acquired the static information from mantle ; on the other hand, through multi - point analysis of a part of the minerals from mantle, the auther got dynamic information from mantle. finally, generalizating the fruits of this study and predecessors, the autor holds that the constituents of lithospheric mantle possibly includes spinel lherzolites, clinopyroxenites, websterite, dunite, harzburgites, garnet lherzite, phlogopite lherzite, eclogites, clinopyroxene megacrysts ; compared with east china and north china platform, the research field mantle shows the characteristics of higher degree of partial melting processes and more depleted mantle ; the. upper mantle beneath north hetian area is heterogeneous, with a tendency of deficit in a12o3 and lree from kaliyang in west hetian to the river basin of kalakshi river and yulongkashi river ; the subduction of the crust beneath north hetian has ever occurred in geological history and caused the mixing of mantle - crust ; the depth of the origination of basaltic magmas beneath north hetian exceeds 73km ; the thickness of the lithosphere beneath the research area amounts to 204. 9km ; the mantle beneath north hetian has geological condtions for forming diamond deposits

最後，綜合本區幔源礦物和地幔巖石的特徵以及地球物理資料，得出如下結論：本區上地幔的物質組成有尖晶石二輝橄欖巖、二輝巖、單斜輝石巖、純橄欖巖、方輝橄欖巖、石榴石二輝橄欖巖、金雲母二輝橄欖巖、榴輝巖；與中國東部以及華北地臺上地幔相比，研究區上地幔具有富集主元素中相容元素和虧損其中的不相容元素的特徵，局部熔融程度較高；上地幔存在橫向和縱向的不均一性，從西部的克里陽到喀拉喀什河和玉龍喀什河流域， al和lree富集程度呈下降趨勢，不同來源的相同礦物中主元素的含量差異較大；地質歷史時期這里可能發生過地殼俯沖並產生殼幔混合作用；玄武巖漿的起源深度73km ；從幔源重砂礦物的溫壓估算結果，可以推斷出巖石圈厚度可達204 . 9km ；綜合巖石圈物質組成特徵、巖石圈熱狀態、地幔溫壓狀態、氧逸度以及幔源巖石和幔源礦物的化學成分，認為研究區具備了金剛石成礦地幔地質條件。

At the course of subduction, collision and collage among the siberia, khazakstan and junggar blocks, the geotectonic environment underwent a few evolutional stages, they provided good congenital, parturient and postnatal conditions for the deposit

在西伯利亞、哈薩克斯坦準噶爾板塊多階段的俯沖、碰撞、拼合過程中，礦床所處的大地構造環境經歷了多個開合演化階段，為該礦床提供了良好的先天、臨產及後天條件。

The temporal and spatial evolution of orogenic granitic belt shows certain kind of regularities : subduction type granites collision type granites extensional type granites

造山帶花崗巖的時空演變規律是：俯沖型碰撞型伸展型。

Due to the subduction of pacific palte under eurasian in early cretaceous, at about 140 ma, fast collapse ( delamination ) took place and the mantle plume emerged, both resulted in the large - scale crustal extension in ludong

3 、富集地幔源區（ em1 ）的產生是俯沖並熔融的揚子下地殼物質進入華北巖石圈地幔並與之相互交代作用形成的。

The pges abundance patterns of residual mantle rock with a peleo - subduction background is characterized by pd, pt depletion and ir, ru relatively enrichment, while the basalt and basic dyke by the processing of partial melt in the same background take an opposite feature of pd, pt enrichment and ir, ru depletion. the existence of fluid in the subduction zone increases the degree of partial melt on the one hand, and on the other, activates the activity of pd, pt compare to ir, ru, and thus reduces the pd ir and pt ru in residual mantle rock. the pges patterns for basalt and basic dyke from two carboniferous volcano zones to south qoltag and north turpan - hami basin, xinjing uigur autonomous region, take a shape of gentle positive inclined curve with lower pt and pd differentiation and lower pges. all these features are obviously different from that of basic dyke and basalt from typical ophiolite and therefore the author believe that their fluid - rich paleo - subduction zone environment can be ruled out

古俯沖帶背景下的殘餘地幔巖的pges配分以pd ， pt明顯虧損和ir ， ru相對富集為特徵，而部分熔融產物的玄武巖和基性巖脈則呈現相反的ir ， ru明顯虧損和pd ， pt相對富集特徵。俯沖帶中流體的參與一方面增加了部分熔融程度，有利於pd ， pt從原始地幔進入熔融相另一方面，流體的作用使得pd ， pt相對于ir ， ru遷移活動性效率提高，造成地幔巖中

In terms of their geological and geochemical characteristics as well as the ages of these plutons, these three sub - belts from south to north are interpreted as syn - subductional, syn - collisional and post - collisional plutons respectively. composed of quartz diorite and quartz monzonite, the syn - subduction plutonic rocks are confined only to the south kunlun massif

俯沖期侵入巖僅出露于蛇綠巖帶之南的昆南地塊上，巖性組合為石英閃長巖-石英二長巖，三個主要巖體獲鋯石u - pb年齡值為481ma 、 461ma 、 452ma ，均為奧陶紀。

Among different opinions, the most popular one is that the temporal and spatial distribution and evolution of the gangdise plutonic - volcanic belt are controlled by the northward subduction of the yarlung zangbo oceanic crust and the southward subduction of the bangong - nujiang oceanic crust

在眾多的觀點中較權威的觀點，是岡底斯巖漿帶的時空分佈與演化受控于雅魯藏布江洋殼和班公湖-怒江洋殼分別向北向南俯沖。

If all goes well, the hybrid rov will let scientists better understand fundamental processes occurring at the deep subduction zones along the continental margins where geochemical recycling of the earth ' s crust takes place

如果一切都進行得很順利，復合型遙控探測器將可使科學家更清楚地了解，發生在大陸邊緣海洋深處隱沒帶的地質變化，以及此處地殼物質所進行的地球化學循環內容。

The southern hainan mafic dykes are strongly enriched in lile with high nb / ta ratios, indicating a magma source reconstructed by silicic - melt through partial melting of ancient subducted slides. however, the northern hainan mafic dykes with chondritic nb / ta ratio should be derived from the fiuid - metasomatized mantle related to ancient subduction zone

瓊南基性巖脈強烈富k _ 2o等lile和具有較高nb ta比值，其地幔源區應受到了古俯沖板片部分熔融形成的硅質熔體的改造；而瓊中基性巖脈的nb ta比值接近於球粒隕石和morb值，應為古俯沖帶含水流體交代的地幔源區的產物。

Certain parts of the plate boundaries along subduction zones appear to be aseismic.

沿消減帶的某些板塊邊界似乎長期無震。

Subduction factory and subduction recycling of continental material

俯沖工廠和大陸物質的俯沖再循環研究

Accretionary subduction complex

加積俯沖復合體

Continental deep subduction

大陸深俯沖作用

Back - arc subduction

弧后俯沖

Mountain building occurs during rapid subduction of one plate under another

當一個板塊迅速地擠壓到另一個板塊下面時會發生造山運動。

Ages of generation and subduction of shiquan river ophiolite : restriction from shrimp zircon dating

測年對獅泉河蛇綠巖形成和俯沖的時間約束

The site of this destruction is another kind of plate boundary : a subduction zone

銷毀舊巖石圈的地方形成另外一種板塊邊界：一塊潛沒的區域。