捕虏岩

Based on the petrological and geochronological study of metamorphic complexes from the Grove Mountains, the following conclusions are reached.(1)Exsolution texture is widely found in clinopyroxene in mafic granulites. A peak metamorphic temperature of 850 C was obtained from the reintegrated compositions of exsolved clinopyroxene. The preservation of augite megacrysts suggests a single episode of high-grade metamorphism for the Grove Mountains.(2)The compositional comparison of garnet from pegmatites with that from country rocks demonstrates that garnet in pegmatites is of xenocryst origin, and late amphibolite facies metamorphism does not occur in this area.(3)The Pan-African charnockite and post-tectonic sheet-like granite were first recognized in East Antarctica. Their occurrences suggest a collisional orogeny during the Pan-African time.(4)The SHRIMP U-Pb zircon dating on various rock types indicates that the major metamorphism in the Grove Mountains occurs at c. 550 Ma, and the tectonothermal evolution terminated at c. 500 Ma. The Grenvillian granulite facies metamorphism did not develop in the studied area.(5)The Prydz belt, the second Pan-African suture within the Gondwana suppercontinent, was further comfirmed based on this study. The Gondwana suppercontinent was not formed by the simply juxtaposition of East and West Gondwana, but by the collision of several blocks during the Pan-African time.

本项目通过格罗夫山地区高级变质杂岩的变质岩石学和同位素年代学研究，获得如下重要认识：（1）发现辉石出溶结构，由此获得峰期变质温度为850 C，并根据火成普通辉石的识别确定该区只存在单相麻粒岩相变质；（2）通过伟晶岩中石榴石斑晶与围岩中石榴石的对比研究提出了石榴石的捕虏晶成因，进而确定该区不存在晚期角闪岩相变质作用；（3）在东南极首次识别出泛非期紫苏花岗岩和后构造层状花岗岩，为泛非构造热事件的碰撞造山成因提供了重要佐证；（4）对不同岩石类型的锆石SHRIMP定年精确地限定了格罗夫山地区主期变质作用发生于泛非期，～550 Ma，热事件结束于～500 Ma，年代学数据没有揭示在该区存在格林威尔期麻粒岩相变质作用的迹象；（5）进一步确认了东南极内部普里兹带的存在，它属于冈瓦纳超大陆内部的第二条泛非期缝合带，据此认为冈瓦纳超大陆并不是由东、西冈瓦纳陆块的简单拼合而成，而是多个不同块体拼合的结果。

On the basis of petrography and mineral chemistry of the xenoliths, the amphiboles in them can be subdivided into four kinds of occurrences ,i.e., 1 the early amphibole inclusions within garnet, being maganesio-hornblende; 2 the primary amphiboles equilibrated with omphacite and garnet in eclogite, belonging to pargasite and pargasitic hornblende; 3 the retrograde amphiboles around garnet and clinopyroxene, mainly being edenitic and actinolitic hornblendes; and 4 the exsolving amphiboles within clinopyroxenes, mainly being edenite, edenitic hornblende and/or ferroan pargasitic hornblende.

对该类捕虏体的岩相学和矿物化学研究表明，其中的角闪石具有4种产状：1位于石榴石中的早期角闪石包裹体，为镁质普通角闪石；2与榴辉岩中矿物平衡存在的原生角闪石，为韭闪石或韭闪石质普通角闪石；3位于石榴石和单斜辉石周边的退变角闪石，主要为浅闪石质和阳起石质普通角闪石；4沿单斜辉石解理分布的出溶角闪石，主要为浅闪石、浅闪石质角闪石和含亚铁韭闪石质普通角闪石。

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。

The Chengzihe Formation in Zhangxin area of Jixi basin,Heilongjiang Province is intruded by the algorite sill. The mafic rocks are pure, porphyritic and contain no xenolith.

黑龙江省鸡西盆地张新地区辉绿玢岩呈岩床状侵入晚中生代城子河组地层中；辉绿玢岩较纯净，无捕虏体，呈斑状结构，斑晶由普通辉石、斜长石组成，斑晶体积分数为35%～40%；基质由微晶斜长石、辉石、磁铁矿及玻璃质组成。

The harzburgite inclusions in western Liaoning could be relicts of partial melting of the mantle-derived peridotites; the amphibole-bearing spinel lherzolites could be representative of Phanerozoic accreted lithospheric mantle; the pyroxenite xenoliths with cumulate textures would be the cumulates of magma derived from asthenosphere in the upper mantle; the granulite and gneisses with crystalloblastic textures could be derived from the lower crust in the region.

辽西尖晶石方辉橄榄岩为地幔橄榄岩部分熔融的残留体；含角闪石的尖晶石二辉橄榄岩可能代表了显生宙新增生的岩石圈地幔；具有堆晶结构的辉石岩类包体为源于软流圈的母岩浆在上地幔顶部的堆积层；而具有变晶结构的麻粒岩和片麻岩类岩石包体则代表了本区下部地壳的物质组成，是岩浆上升过程中捕虏的深部地壳岩石包体。

The lherzolite, wehrlite and pyroxenolite are three main kinds of xenoliths in Yitong upper mantle shear belt, Northeastern China. Spinels in the xenoliths are characterized by aluminumenriched in compositions.

伊通上地幔剪切带中辉石岩、二辉橄榄岩和易剥橄榄岩是3个主要地幔捕虏体，其中尖晶石的化学成分以富铝为特征。

Following evidences indicate that lherzolite and garnet pyroxenite xenoliths in basalts are captures of mantle fragments when host magma ascending: crystallizing temperatures and pressures of cpx megacrysts and some phenocrysts in host magmas are greater than equilibrium temperatures and pressures of xenoliths; calculated REE partition pattern of assumed equilibrium melts is not comparable with that of studied host basalt rocks; olivine in xenoliths is not in equilibrium with basalt rocks.

寄主玄武岩的单斜辉石斑晶—熔体平衡温度高于石榴石二辉橄榄岩和石榴石辉石岩包体的平衡温度，单斜辉石巨晶和部分斑晶—熔体平衡压力大于包体平衡压力，寄主碱性玄武岩的稀土配分型式和所计算的与尖晶石二辉橄榄岩包体平衡的熔体的稀土配分型式不同，包体橄榄石与寄主岩浆之间的Fe-Mg交换系数低于0.30，均表明包体与寄主玄武岩浆之间不存在平衡关系，因此，包体是被寄主玄武岩浆捕虏的上地幔碎块。

Mafic, ultramafic and/or alkaline volcanic rocks and their entrained mantle peridotitic xenoliths and xenocrysts are known as samples directly from the lithospheric mantle.

基性、超基性火山岩捕获的地幔橄榄岩捕虏体和捕虏晶是直接源自岩石圈地幔的样品。

These peridotitic xenoliths show clear deformed textures and their major minerals show excellent orientation.

橄榄岩捕虏体具有明显的的变形结构，矿物定向排列，属于典型的变形橄榄岩。

These peridotitic xenoliths show clear deformed textures and their major minerals show excellent orientation. Thus, these peridotites are typical deformed peridotites.

橄榄岩捕虏体具有明显的的变形结构，矿物定向排列，属于典型的变形橄榄岩。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。