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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。
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Of or relating to a dialect of Sotho or the Bantu people who it .
属于或关于茨瓦纳方言或说茨瓦纳的人的。
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Of or relating to a dialect of Sotho or the Bantu people who speak it .
属于或关于茨瓦纳方言或说茨瓦纳语的班图人的。
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Our results support the hypothesis that the early cladogenesis of the Gekkota was associated with the split of Eastern Gondwanaland from Western Gondwanaland.
我们的结果支持壁虎类在早期分化为东冈瓦纳支系(絮趾虎科+刺尾虎科+鳞脚虎科)和西冈瓦纳支系。
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Our results support the early divergence of the Gekkota into Eastern Gondwanaland lineage (Diplopodactylidae, Pygopodidae and Carphodactylidae) and Western Gondwanaland lineage.
我们的结果支持壁虎类在早期分化为东冈瓦纳支系(絮趾虎科刺尾虎科鳞脚虎科)和西冈瓦纳支系。
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Tarim massif, and its like Yangzi massif, cratonized in Neo-proterozoic, was affinitive to Gondwanaland, possibly a slice of Gondwanaland deduced from the research of breakup of Rodinia.
在晚元古代中期完成克拉通化的塔里木地块,与当时的扬子地块一样,和岗瓦纳古陆具有较强的亲缘性。从Rodinia古陆的拼合研究中推断它们可能同为岗瓦纳古陆的一部分。
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We consider the Xijinwulan- Jinshajiang suture as an additional Indosinian suture which developed within the Yangtze plate. The Bangong Co-Nujiang and Yarlung Zangbo sutures developed within the Gondwanaland domain, but neither can be con- sidered to define the northern boundary of Gondwanaland.
西金鸟兰-金沙江缝合带是发育在扬子板块内部的印支期缝合带,班公湖~怒江和印度河一雅鲁藏布江缝合带是发育在冈瓦纳大陆框架下新特提斯阶段的缝合带,构不成冈瓦纳北界。
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Differently, among the Cenozoic alkaline-enriched porphyries in Jianchuan, Beiya et al., Pb isotope composition is dominated by Yangtze block and Gondwana continent together,〓Pb/〓Pb ratios increase, and most of them approach 18.5, average 18.556, which is apparently of the characteristics of hybrid composition of Yangtze Pb isotope province and Gondwana Pb isotope province.
与此不同的是,剑川、北衙一带的新生代富碱斑岩中,Pb同位素组成明显地表现为扬子地台与冈瓦纳大陆共同作用,〓Pb/〓Pb比值增加,多数接近18.5,平均值为18.556,明显具有扬子Pb同位素省与冈瓦纳Pb同位素省混染杂交的特征。
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During the period of the astronomical evolution the Gondwana land formed at the south pole and high latitude areas. At the early stage of geological evolution the horizontal motion of magma might have driven the original crust to split and its northern edge might have drifted to where the outer-core liquid converged i.
在天文演化阶段,冈瓦纳古陆形成于南极;在地质演化阶段,南半球表层液核流体获得向东北的速度,同时导致了冈瓦纳古陆的分裂和漂移。
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Salt Lake City — When the package arrived at Thevananth Thevanayagam's office in Jaffna, it seemed like a miracle.
盐湖城-当一个包裹运抵沙瓦纳斯 E 沙瓦纳亚加在贾夫纳的办公室时,似乎已是一项奇迹。
- 更多网络解释与瓦纳相关的网络解释 [注:此内容来源于网络,仅供参考]
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bw : Botswana:伯兹瓦纳
bv : Bouvet Island , 布韦群岛 | bw : Botswana, 伯兹瓦纳 | by : Belarus, 白俄罗斯
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Copacabana:科帕卡瓦纳
从那里,车队转战巴西,在里约热内卢世界著名的科帕卡瓦纳(Copacabana)海滩展开了一场精彩的市内挑战赛. 之后车队从低地穿过乌尤尼盐沼(Salar de Uyuni)广袤的盐层平原,比赛在玻利维亚境内的崎岖而美丽的安第斯(Andes)山地达到高潮,
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HAVANA, Cuba:哈瓦纳(古巴)
弗里波特(巴哈马)----FREEPORT,BAHAMAS | 哈瓦纳(古巴)----HAVANA,CUBA | 金斯顿(牙买加)----KINGSTON,JAMAICA
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CHAVANNES, Nestor:内斯托.夏瓦纳
CHAVANAVIRAJ, Saroj;沙罗.查瓦那威拉;; | CHAVANNES, Nestor;内斯托.夏瓦纳;; | CHAVARRIA, Carlos Enrique;卡洛斯.恩里克.查瓦里亚;;
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Talcahuano:南美西岸 智利 塔尔卡瓦纳
南美西岸 智利 瓦尔帕莱索 Valparaiso | 南美西岸 智利 塔尔卡瓦纳 Talcahuano | 南美西岸 智利 圣文申特 San Vicente
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Rudra Varna MahaviHar:鲁德拉瓦纳佛寺
金廟 Hiranya Varna MahaviHar | 鲁德拉瓦纳佛寺 Rudra Varna MahaviHar | 孔贝斯瓦尔寺 Kumbheshwor
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Singh,Viswanath Pratap:辛格,维什瓦纳特.普拉塔普
Singh,Shekhawat Bhairon 辛格,谢科瓦特.巴伊隆437 | Singh,Viswanath Pratap 辛格,维什瓦纳特.普拉塔普437 | Singha Durbar 辛格.杜尔巴尔 437
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Gondwana land:冈瓦纳古陆
根据在印度中东部的标准地质区冈瓦纳(Gondwana)发现的舌羊齿类植物化石,在印度、南美、南非、澳洲和南极都被发现,所以,设想这些南半球陆地是曾经拼合在一起的单一的巨大陆块,命名为冈瓦纳古陆(Gondwana land).
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Gondwana land:冈瓦纳古陆,冈瓦纳大陆
Gondwana land - 冈瓦纳古陆,冈瓦纳大陆 | gradient - 梯度,斜率 | gravity - 重力
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Tswana:茨瓦纳族
茨瓦纳族(Tswana) 索托人南迁的西支,人口330万. 操茨瓦纳语. 现主要分布于西北省和北开普省. 聪加族(Tsonga) 恩古尼人的北支,操聪加语,与莫桑比克境内的聪加人同族. 人口176万,现主要分布于北方省. 斯威士族(Swazi) 恩古尼人的北支,