太古代
- Archaean;Archeozoic;archaeozoic;Archaeozoic era
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研究区花岗岩外带型铀矿化受太古代混合岩化花岗岩控制,主要分布在岩体内外接触带。
Granite take-out type of uranium mineralization in research area be controlled with Archaeozoic era mix granite , mainly distributed in internal and external contact belt . 6 .
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根据野外接触关系和一组锆石Pb-Pb蒸发年龄(2451Ma),确定其成岩时代为太古代。
According to the relation of contact in the field and Pb Pb evaporation age of a set of zircon ( 2451 Ma ), its diagenetic age can been ascertained the Archaeozoic Era .
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大面积的华北地区,在太古代的基底下具有明显的Pn波低速度。
A large area of North China shows prominent low P_n velocities beneath the Archean basement .
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张家口宣化地区太古代麻粒岩退变质作用与RbSr等时年龄证据
Retrogressive Metamorphism of Archaean Granulites and the Evidence of Rb-Sr Isochron Age in Zhangjiakou and Xuanhua Regions
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富铝片麻岩和榴线英岩的微量元素分配形式与澳大利亚后太古代页岩(PAAS)接近。
Trace element spide-grams of aluminum-rich gneisses and garnet-sillimanite-quartzites are close to PAAS .
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辽西&赤峰一带太古代变质岩中锆石U-Pb年龄
The Zircon U-Pb Ages of Archean Metamorphic Rocks in Western Liaoning Province-Chifeng Area
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华北晚太古代-早元古代高级变质区的变质PTt轨迹及其地壳热动力学演化模式
PTt Path and Crustal Thermodynamic Model of Late Archaean Early Proterozoic High grade Metamorphic Terrain in North China
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辽东清原地区太古代岩石Rb-Sr年代
Rb-Sr geochronology of Archaean rocks in the Qingyuan area , Eastern Liaoning
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这表明华北太古代的构造体制有可能使大量地壳物质重新进入地幔从而保持ε(Nd)值的恒定。
These observations suggest that the tectonic regime in the Archaean would cause large quantities of continental material to enter into the mantle , thus maintaining a fairly constant value of ε Nd .
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稀土元素标准化配分曲线呈现出轻稀土富集、重稀土平坦和明显Eu、Ce负异常特征,类似于上地壳和典型太古代页岩,具有海相沉积特征。
The REE patterns of analyzed sediment rocks in the Pingxiang basin are similar to those of the upper crust and typical Archean shales , and show enriched LREE and flat HREE with obvious Eu-and Ce-anomalies .
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内蒙古固阳晚太古代赞岐岩(sanukite)&角闪花岗岩的SHRIMP定年及其意义
SHRIMP dating and geological significance of Late Achaean high-Mg diorite ( sanukite ) and hornblende-granite at Guyang of Inner Mongolia
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河南中部太古代登封花岗-绿岩地体中TTG质片麻岩与绿岩带关系及其地壳演化意义
Relationships between the tTG gneisses and the greenstone belt in the Archean Dengfeng granite-greenstone terrane , central Henan and their implications for crustal evolution
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在野外1∶10000地质填图及室内研究工作基础上,认为夹皮沟地区太古代主体岩石是中酸性侵入体(TTG),已变质成为长英质片麻岩。
According to field geological mapping ( scale 1:10000 ) and comprehensive study in laboratory , the major archaeozoic rocks are intermediate-acid intrusives , which were metamorphosed into the felsic gneisses .
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通过对其地质特征、岩石学特征、地球化学特征的讨论,初步认为是一套古老的(晚太古代)偏基性TTG岩套。
It is suggested that Long Cao Ping gneiss might be an old ( late Archean era ) and basic TTG suite after discussing the characteristics of geology , petrology and geochemistry .
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矿床产于太古代建平群深变质岩中,矿体产出受NW向断裂构造控制,金矿化与中生代侵入岩关系密切,矿石类型主要为石英脉型。
The deposit occurs in the deep metamorphic rock of Archean Jianping formation , with the orebodies controlled by NW fault structure . The gold mineralization is closely related to the Mesozoic intrusion rock and the ore is mainly of quartzite vein type .
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太古代时形成若干规模有限的陆核,地壳增长的主要时期为1.8~2.2Ga,1.5~1.8Ga期间的地壳增长主要发生在赣东北、皖南和浙东、闽东地区。
The growth during 1.5 ~ 1.8 Ga A. C. occurred in northeastern Jiangxi , southern Anhui , eastern Zhejiang and eastern Fujian .
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东海陆架东部凹陷带渐新统砂岩锆石的U-P年龄表明陆架东部渐新世物源以元古代变质岩为主,其次为中生代母岩及少量太古代变质岩与古生代母岩。
The U-P dating data of zircons from Oligocene sandstones in the east of East China Sea shelf indicate that most zircon grains are Proterozoic , and then are Mesozoic , including sporadic Archean and Paleozoic ones .
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该韧性剪切系统发生于晚太古代至早元古代的五台运动期间,经历过两期次韧性剪切作用,早期的差异应力约为12MPa,晚期的差异应力约为30MPa。
This giant ductile shear system was formed during Wutai Movement from late Archean to Early Proterozoic and experienced two periods of ductile shearing . The differential stress in early period of shearing is about 12 MPa and the late is about 30 MPa .
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太行山太古代阜平群中的刚玉、矽线石型矿床的成因
Origin of corundum-sillimanite deposit in Archean Fuping group , Taihang Mountains
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太古代岩石的定年&方法学和局限性的讨论
Dating of Archean rocks : a discussion of methodology and limitations
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从太古代片麻岩系推测地球的成因和发展
On the origin and development of earth from the Archaean gneisses
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中国辽宁北部太古代绿岩建造
THF Archaean greenstone formation in northern Liaoning province , china
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鞍山地区太古代岩石同位素地质年代学研究
Geochronological study of Archaean rocks in anshan , Liaoning Province
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增量成本,边际成本、新增成本.亦见averageincrementalcost内蒙古中部太古代麻粒岩递增变质成因
Incremental cost Progressive Metamorphic Genesis of Archaean Granulites in Central Nei Mongol
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大同&集宁地区太古代变质基性岩墙群的基本特征
Features of the Archean Meta-Basic Dyke Swarms in Datong-Jining Region
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太古代脉状金矿研究的某些新进展
Advances in the study of Archean lode gold deposits
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太古代上地壳的双峰式模型
A bimodal mixing model of the Archean upper crust
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论清源北部太古代地质几个基本问题
Some basic problem on Archean geology in North Qingyuan county , Liaoning Province
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清原太古代花岗岩-绿岩地体的常量和微量元素地球化学证据
Major and trace element geochemistry of the Archean Qingyuan granite - greenstone terrane
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冀东太古代麻粒岩相变质岩中的K/Rb比值
K / rb ratios in Archaean granulites in the eastern part of Hebei Province