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The Pb-Pb isochron of metamorphic argillite in Shuangqiaoshan Group is 1 490±68 Ma, while the Nd mode ages of Zhanggongshan Group, Shuangqiaoshan Group, Chenglang Group and Xiushui Group are 1.57 Ga, 1.89 Ga, 1.77 Ga, 1.60 Ga,respectively, less than 1.6-1.9 Ga, which suggest that they formed in Middle Proterozoic Subera.
研究结果还显示，双桥山群变质泥质岩的Pb-Pb等时线年龄为（1 490±68）Ma，而障公山群、双桥山群、程浪群和修水群的钕模式年龄分别为1.57 Ga、1.89Ga、1.77Ga和1.60 Ga，均分布在1.5～1.9 Ga之间，表明这些地层的形成年龄应小于1.9 Ga，是中—晚元古代的产物，同时表明扬子古陆南缘存在古元古代的基底。
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These results indicate that both the second type leucosome in the biotite gneisses and the first type leucosome were produced synchronously in the Paleoproterozoic granulite-facies metamorphism, and that both the melt-derived and the metamorphic Paleoproterozoic zircons suffered significant lead-loss in the Triaasic, suggesting that both felsic granulite and biotite gneisses be responses to the Triassic deep subduction event.
这表明，第二类浅色体和第一类浅色体都是古元古代麻粒岩相变质作用同期深熔产物。古元古代熔体结晶和变质结晶锆石在三迭纪发生了严重的放射性成因铅丢失，可反映长英质麻粒岩和黑云母片麻岩都响应了三迭纪深俯冲事件。
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The basal continental crust of Tarim-Tianshan area in Xinjiang consists of the continental nucleus, which is composed of grey gneisses, greenstones, and potass granites similar to charnockites, and its accretionary belts mainly of the early Proterozoic and partly the Middle Proterozoic.
塔里木－天山地区基底陆壳由太古宙灰色片麻岩、绿岩和可能是紫苏花岗岩的含钾花岗岩类组成的陆核及其古元古代和少量中元古代增生带组成。
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In the northwestern part of North China Craton, there is a series of the Early Proterozoic thrust structure s.
华北克拉通西北部发育一系列早元古代的逆冲构造，它们在岩石组成、构造样式、产状、运动方式和时代等方面的特征具有明显的一致性，表明该地区在早元古代经历了一次强烈的造山作用。
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Boron deposits of eastern Liaoning occur in a suite of Early Proterozoic metamorphic rocks, with boron orebodies existent in magnesian marble.
辽东硼矿床产于早元古代的一套变质岩内，硼矿体赋存于镁质大理岩中。
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The sixth chapter studies the relationship between MMs and stylistic feature, taking a dynamic perspective to study style, with the second section of this chapter analyzing the usages of MMs in report text and comment text of news style, the third comparing the different usage of three Chinese translations of Uncle Toms Cabin, the fourth analyzing the usage of MMs in three kinds of modern Chinese text , the fifth comparing the usage of MMs in three disciplines academic text and The sixth discussing the interactional rehtorical model, including the establishment of self-identity of speaker/writer, the expectation to reader/hearer, and the intertextuality interaction.
第六章讨论元话语和各语体语篇语体特征的关系，认为从元话语的角度来分析语体是从动态的角度来探讨言语行为和语体类型之间的关系，第二节讨论了报道体和时评体语篇中元话语使用情况，第三节比较了Uncle Tom's Cabin的文言文、古代白话和现代汉语三个译本中元话语标记使用的差异，第四节比较现代汉语三种语体文本中元话语标记使用情况，第五节讨论三个专业的学术论文中元话语标记的使用差异；第六节讨论元话语与语篇的互动修辞，讨论了语篇中表达者自我身份的确立、语篇对接受者的期待和呼吁和语篇的互动模式，说明元话语研究对探讨语篇的修辞互动模式和结构具有重要的意义。
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Several main results on the evolutions of the life and environment on early earth are summarized as follows:(1) the oxygenation of surface environment didn''t cease until a stable stage for 0.4Ga appeared after 1.6Ga;(2) compared to the isotopic compositions of kerogens and coexisted carbonates, the differences between two can effectively carrier the signals from local environments and bio-assemblages;(3) multiple isotopic relationships between kerogens and individual alkanes in Proterozoic samples were observed, which would depend on the specific biogeochemical processes;(4) repeated biogeochemical changes were observed accompanying Neoproerozoic glaciations, which suggesting that environmental rather than evolutionary forces were driving the biogeochemical changes;(5) the bio-radiations after Neoproterozoic glaciations were definitely suggested by molecular and isotopic data to be at the early Cambrian and after the middle of Doushantuo deposition with different triggers for them.
研究获得以下重要认识：（1）古元古代地表环境的氧化可能一直持续到中元古代早期(约1.6Ga)，而在此之后的4亿年里则保持相对稳定；（2）相对于传统的干酪根和碳酸盐的碳同位素组成，二者之差则能更好反映区域环境的演化特征；（3）在元古代干酪根与单体烷烃类之间存在多种碳同位素组成关系；而其与不同的生物地球化学过程有关；（4）全球海洋生物地球化学特征随新元古代多次冰期出现循环波动，这显然为环境因子的驱动；（5）在新元古代大冰期之后，分子与同位素数据显示地球生命在陡山沱中后期和早前寒武纪出现两次大辐射，然而两次生命辐射的本质却是不同的。
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The banded iron-bearing quartzite etc., evidentely show the metamorphic strata of whole Proterozoic and probably even of Archaeozoic.
结合隆起带内具条带状构造的含铁石英岩等资料，论证了中天山隆起带出露有整个元古代的变质岩层。
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Of, belonging to, or being the later of two divisions of Precambrian time, during which sponges, sea worms, and other forms of sea life appeared.
原生代的，元古代的前寒武纪两个时期中的后一个时期的，属于这个时期的，在这个时期的在这个时期海绵、海洋蠕虫和其它形式的海洋生命出现
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The data show the following ages: 1894±17 Ma and 1847±59 Ma for garnet pyroxenite of the Tiantangshan Group complex, indicating a Paleoproterozoic age; 1462±28 Ma for the metabasic volcanic rocks of the Yunkai Group complex, indicating the presence of fragments of the Meso- and Neoproterozoic oceanic crust in the Yunkai area; 906±24 Ma for the granitic gneiss intrusion is, which should be the product of the global Grenville collisional orogeny occurring around 1000 Ma BP. In addition, an inherited detrital zircon age of 2702±13 Ma was also obtained, which is the oldest age in the Yunkai area and even in Cathaysia, proving the presence of Neoarchean continental crustal material in Cathaysia.
获得天堂山岩群石榴辉石岩的形成年龄为1894Ma±17Ma和1847Ma±59Ma，表明其时代为古元古代；云开岩群洋中脊型变质基性火山岩的喷发年龄为1462Ma±28Ma，证明该地区存在中元古代的古洋壳残片；获得花岗质片麻岩的侵入年龄为906Ma±24Ma，应为1000Ma前后发生的全球性Grenville期造山作用的产物，并获得2702Ma±13Ma的继承碎屑锆石年龄，这是云开地区乃至华夏古陆目前获得的最古老年龄，证明华夏古陆曾存在新太古代陆壳物质。
- 更多网络解释与元古代的相关的网络解释 [注：此内容来源于网络，仅供参考]
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algonkian：阿尔冈纪 元古代的
algondon | 棉花 | Algonkian | 阿尔冈纪 元古代的 | Algonkin | 阿尔冈琴族(语, 人)
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archean：太古代
带状铁岩(Banded ironstone或Banded iron)是由薄层磁铁矿或赤铁矿等氧化铁反覆堆叠,并夹杂带状页岩或燧石所组成,其构成的岩层称为带状铁岩层(Banded ironstone formations,简称BIFs),主要形成年代以太古代(Archean)和元古代早期(early Proterozoic)为主,
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Aristippus：亚里斯提卜
西元[[前5世纪]]的[[亚里斯提卜]](Aristippus)、前4世纪的[[伊比鸠鲁]]、中国古代的[[墨子]]及其追随者的伦理学中都存在著如何促使最大的快乐的思维,他们是古人中的功利主义先驱.
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phanerozoic eon：显生宙
古生代(Paleozoic era)地质年代名称,显生宙(Phanerozoic Eon)的第一个代,距今约5.7亿年至2.3亿年前,占显生宙时期的2/3. . --地质年代的第3个代(第1、2个代分别是太古代和元古代). 约开始于5.7亿年前,结束于2.3亿年前. [1]第四纪(Quaternary) . 第三纪(Tertialy)
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proterogyny：雌蕊先熟的
proterogynous flower 雌蕊先熟花 | proterogyny 雌蕊先熟的 | proterozoic era 元古代
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proterozoic era：元古代
元古代(Proterozoic Era)开始于大约24亿年以前,结束于大约5.7亿年以前的"生命大爆炸",这时细菌和蓝藻开始繁盛,后来又出现了红藻,绿藻等真核藻类. 藻类在生长过程中粘附海水中的沉积物颗粒形成层纹状结构物,称作叠层石,叠层石是地球上最早的生物礁,
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proterozoic stratum：元古代层
proterandrous 雄蕊先熟的 | proterozoic stratum 元古代层 | prothallium 原叶体
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runic：古代北欧文字的
sound absorbent lining 吸音衬层 | runic 古代北欧文字的 | planar element 平面元
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unknown number：未知数
未知数(unknown number)是在解方程中有待确定的值. 我国古代并不用符号来表示未知数,而是用筹算来解方程. 至宋、元时代的「天元术」,用「立天元」表示未知数,并在相应的系数旁写一个元字以为记号. 至元朝朱世杰(约13 世纪)用天、地、人、物表示四个未知数,
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proterandrous：雄蕊先熟的
proteometabolism 蛋白质代谢 | proterandrous 雄蕊先熟的 | proterozoic stratum 元古代层