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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。

It was no longer necessary to use thick walls of stone or brick for multistory buildings, and it became much simpler to build fire-resistant floors.

它不再需要使用石头或多层建筑物的砖头厚的墙壁,也成了简单得多建立防火层。

Seepage proof facing plate or watertight concrete layer often locates in stone masonry arch dam .

在上游面或内部偏上游处设置了混凝土防渗层的砌石拱坝为成层异弹模坝。

To investigate the influence of st ratified characters of soil , numerical examples of single pile in representative soil st rata were studied.

为考察地基土成层性对单桩性状的影响,还对几种典型层状地基中的单桩进行了参数分析。

A new SOI LDMOS with folded silicon is proposed,in which the silicon substrate surface is trenched to form a folded shape from the channel to the drain electrode and the gate is extended to the drain.

提出了一种具有折叠硅表面SOI-LDMOS新结构。它是将硅表面从沟道到漏端的导电层刻蚀成相互排列的折叠状,且将栅电极在较薄的场氧化层上一直扩展到漏端。

In cross-sectioned root form 2 middle bark layer next Internal bark layer especial structure of regularly array; epidermis cell of stems and leaves have developed thickened epiderm, leaves epidermis covers hair, it formed developed vascular bundles.(4)Chromosomes of Agropyron cristatum is tetraploid .

根横切面上形成了在紧靠内皮层的两层中皮层细胞有规则整齐排列成两环的特殊结构;茎和叶表皮细胞均具有发达的角质层,叶表皮多密被毛,其形成了发达的维管束及维管束鞘。

The square-built dolomite flat containing karstenite and karstenite-dolomite flat in the Ordovician of middle-eastern Ordos Basin provide the favorable condition for the stratify development of pores and holes and the large acreage distributing.

鄂尔多斯盆地中东部奥陶系呈现出宽缓的盆缘含硬石膏白云岩坪与盆缘硬石膏白云岩坪相带,为孔洞型储层的成层发育、大面积展布创造了良好的条件。

Also, Petrologic features, diagenesis and pore evolution features, and reservoir feature were worked and evaluated. The study direction of Neopaleozoic reservoir geology in this area was pointed out too.

同时,对区内砂岩储层的岩石学特征、成岩作用及孔隙演化特征和储集特征方面等进行了综合研究和客观评价,并分析讨论了今后该区上古生界油气储层地质的研究方向。

A method for evaluating the performance of capacitance-based tomographic imaging system is discussed in this Thesis.

作者在论文中从判断电容成象系统性能这一角度,提出了电容层析成象系统的评测指标和评测方法。

On the basis of the topological structure of FBB and their polymerization in borates(isolate, chain, layer and framework), a new systematic borate-classification is put forward,and all available borates are classified.

依据FBB自身的拓扑结构不同和在晶体结构中的排布方式不同(孤立、成链、成层、成三维网架)对所有可用的硼酸盐进行了系统的分类。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。