查询词典 peridotite

Well-documented Lu-Hf isotope data from the oceanic basalts show that,the starting area of magma melting for the MORBs derived from the DMM component would be in the the depth of garnet peridotite,i.e.at the depth of 80―90 km instead of less than 60 km,which is at the depth of spinel peridotite as proposed early.The HIMU component,which is characterized by its high rediogenic lead,is refered as a special mantle component differentiated at some time in geological history from the lower mantle.A correlation study of Hf-Nd isotope between the chondrite and oceanic basalts implies that no isolated primitive mantle might have remained.

大量的大洋玄武岩Lu-Hf同位素研究表明：具亏损地幔端元来源的洋中脊玄武岩岩浆部分熔融的初熔区位于石榴石稳定场深度，即深度为80-90 km的石榴石二辉橄榄岩地幔，而不是原来所认为的尖晶石二辉橄榄岩区(深度小于60 km)；以高放射成因Pb为特征的高U地幔端元应代表了下地幔物质在某一特定时期发生分异作用的结果；球粒陨石与大洋玄武岩Hf同位素对比研究表明，没有原始地幔物质能保留至今的迹象。

In this paper ophiolites in the Western Zhungeer are divided into two types: One of them is assemblage of metamorphic peridotite troctolite gabbro; another is that of metamorphic peridotite pyroxenite gabbro.

本文将西准噶尔地区蛇绿岩分为两类：一类是变质橄榄岩橄长岩辉长岩岩石组合；另一类则是变质橄榄岩辉石岩辉长岩岩石组合。

Genetic mechanism of metamorphic peridotite in the ophiolites is partial melting of the upper mantle peridotite. Difference between two types ophiolites is dicided by degree of the partial melting.

两类蛇绿岩中变质橄榄岩的成因机制是上地幔岩部分熔融，两者之间的差异则是由部分熔融程度决定的。

Our project is based on Cenozoic volcanic rocks and deep seated xenoliths in it to reconstruct the source composition and ctructure. We did field investigation, collection of samples, determination of age and composition characteristics of selected samples. The new achievements are following. 1 recognized a potassic metasomatic source of the Cenozoic volcanic rocks through an integrated research of volcanic rocks and their sources. 2 analysis of TM images suggests the Tuoyun basin is a basin with a volcano group instead of a simple volcano-tectonic basin. We found several volcanic craters and cone, and detected three such craters. 3 systematic reseach of volcanic sections and collection of samples both of volcanic rocks and xenoliths, the later includes peridotite, granulite, gneiss and variety of megacrysts. This is propitious to our further research at this rigion. We would like to point that we collected some peridotite large than 20cm in diameter. It could used to variety of analysis and end the history without mantle chemistry records in the region. 4 we got a U-Pb SHRIMP age of 3.87 Ma for the Kangxiwa basalt.It is the youngest record of U-Pb SHRIMP age in China and provide a chronology restriction for last uplifting of Tibet plateau. 5 the investigation of alkali syenite-synogranite in Taxkogan suggests that the origin of Parmir syntex is related to the Cenozoic magmatism.

本项目立足于从火山岩属性和深源捕掳体反演源区成分与结构两个途径，利用火山岩综合研究成果对地幔源区进行了初步反演，提出源区经受过强烈钾质交代的观点；对重点工作区TM图像进行了初步解译，新发现若干了火山口，并对其中三个火山口作了实地查验，为进一步全面深入开展该区的火山地质学及相关科学问题打下了良好基础，认为托云盆地是一个火山群，而不是一个单一的火山构造盆地；系统测制了火山岩剖面，新采集了一批重要的火山岩和深源岩石捕虏体样品，为下一步工作打下基础，特别是采集到了直径打20cm的幔源橄榄岩包体，可用于各种测试，将可以结束西部造山带没有地幔岩化学分析结果的历史；对康西瓦玄武岩进行了测年分析，取得了我国目前最年轻的锆石U-Pb SHRIMP年龄，对青藏高原挽近地质时期的隆升提供了年代学约束；对帕米尔东缘塔什库尔干碱性岩体的动力学意义进行了探讨，提出青藏高原西部构造结的形成与岩浆活动有关的观点。

Based on the study of correlativity of Ol-Opx-Cpx contents in North China and South China, it shows that some peridotite xenoliths from Hannuoba, Pingquan, Nvshan, Puning, Qiongbei, and Niutoushan area may represent the older mantle material compositions, and some peridotite xenolith from Ximeng, Penglai, Linqu, Quzhou, Mingxi, and Liuhe area may represent the younger mantle material compositions.

通过对华北、华南两区橄榄岩包体中的O1与Opx及Cpx的相关关系的分析研究认为，华北汉诺坝和平泉地区，以及华南女山、普宁、琼北、牛头山等地区的部分橄榄岩包体，代表了老地幔；锡盟、蓬莱、临朐及衢州、明溪、六合等地区的部分橄榄岩包体代表了较新地幔。

This study wants to perform researches on the Kangjinla chromitite and its host rock-mantle peridotite, to determine the existence of special mantle minerals, to discuss the origin of the chromtite and mantle peridotite together with the genetic relation between them.

本论文拟开展罗布莎地幔橄榄岩体中的康金拉铬铁矿床及其围岩地幔橄榄岩的研究，查明该铬铁矿矿体，尤其矿体围岩的地幔橄榄岩中是否也存在金刚石等特殊地幔矿物；通过详细的矿物学和岩石学的研究，探讨铬铁矿和地幔岩的成因，以及两者之间的成因联系。

Basing on detailed field survey and laboratory researches on lithological features, mineralogical composition, geochemical and zircon SHRIMP U-Pb data, together with the mineralogical study of chromitite and mantle peridotite heavy mineral bulk sample, various proceedings and recognitions have been achieved:(1) The mantle peridotite is the remnants of partial melted MOR mantle altered by SSZ fluids.

通过详细的野外调查和室内岩石薄片的岩相学、矿物成分、岩石地球化学和锆石SHRIMP U-Pb同位素年代学，铬铁矿和地幔橄榄岩的人工重砂大样的矿物学研究，取得以下进展和认识：(1)认为康金拉地幔橄榄岩为部分熔融MOR地幔残余，叠加了SSZ流体的改造。

According to the geochemical data, the formation of mantle peridotite might be: during the spreading of ocean floor, the MOR mantle underwent variable degrees of partial melting and formed the depleted mantle peridotite with podiform chromitite; during the spreading of ocean basin, intra-ocean subduction happened, REE and LILE rich fluids containing water derived from the subduction slab migrated upwards and metasomatism happened to peridotite relic.

康金拉矿区的地幔橄榄岩的地球化学特征反映了其形成过程的复杂性，表现为：洋底扩张期间，扩张脊下的MOR型地幔的经历了不同程度的部分熔融，形成了亏损地幔橄榄岩，该地幔橄榄岩中赋存了来自深部的豆荚状铬铁矿。

The deep origin of Kangjinla podiform chromitite is suggested by: that for the Kangjinla chromitite and the mantle peridotite rocks, the compositions of the chrome spinel, olivine and clinopyroxene are rather different, which indicates that the chrome spinel in the chromitite is neither the simple concentration of that in the host rocks nor with certain genic relation with mantle peridotite. Though the chromitite might be exotic for host rocks, both of them were carried from deep mantle to the shallow place by mantle plum.

康金拉铬铁矿石与矿体围岩地幔橄榄岩的铬尖晶石、橄榄石和单斜辉石等成分方面明显不同，认为矿石铬尖晶石并非是由副矿物铬尖晶石富集而成，与地幔橄榄岩也不存在成因联系，认为豆荚状铬铁矿床对于近矿围岩地幔橄榄岩而言为外来体，但两者可能均是由地幔深部被地幔柱带到上部。

GroupⅠ, the peridotite inclusions with typical pyrolite textures (metamorphic and deformation textures);(2) GroupⅡ, the peridotite and olivine-pyroxenite inclusions with metamorphic and deformation textures and overlaid mineral reaction textures or relic magmatic crystalline textures or/and cumulate textures; and (3) GroupⅢ, the pyroxenite inclusions with crystalloblastic texture and cumulate textures.

深源岩石包体的岩相学表明，鲁西深源岩石包体具有三种结构类型：①具有典型地幔岩结构的橄榄岩类岩石包体；②具有变质变形结构，并叠加有矿物反应结构以及残留有岩浆结晶结构的橄榄岩、橄辉岩类岩石包体；③具有变晶结构或堆晶结构的辉石岩类包体。

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。