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锆石     
相关语句
  zircon
     SHRIMP U-Pb Zircon Geochronology, Geochemistry and Nd-Hf Isotope of Neoproterozoic Magmatic Rocks in Western Sichuan
     川西新元古代岩浆岩的SHRIMP锆石U-Pb年代学、元素和Nd-Hf同位素地球化学
短句来源
     THE COMPLETE SEMIMICRO ANALYSIS OF ZIRCON
     锆石半微量全分析
短句来源
     THE FACTORS OF ZIRCON METAMICTIZATION IN GRANITES
     花岗岩中锆石变生因素的研究
短句来源
     TECHNIQUE OF FISSION TRACK DATING OF ZIRCON
     锆石的裂变径迹年龄测定技术
短句来源
     A STUDY ON THE CODING OF ZIRCON CRYSTAL FORMS
     锆石晶形的编码研究
短句来源
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  zircons
     LA_ICP_MS analysis shows that the inherited zircons are characterized by high concentrations of Y (1121×10 -6), HREE (641×10 -6) and MREE (182×10 -6), and low abundances of U (207×10 -6), Th (171 ×10 -6) and Hf (0.96%).
     LA_ICP_MS分析表明残留锆石的特点是Y(1121×10-6)、HREE(641×10-6)和MREE(182×10-6)含量高,U(207×10-6)、Th(171×10-6)和Hf(0.96%)含量低。
短句来源
     SHRIMP U-Pb dating of zircons from the diorite yields an apparent 206Pb/238U age of 316±3 Ma.
     对其中一个闪长岩中的锆石进行SHRIMP U-Pb定年,获得了316±3 Ma的206Pb/238U表面年龄。
短句来源
     (2)Magmatic euhedral zircons,they give an upper intercept age of 1784±11Ma and lower intercept age of 448±13 Ma.
     (2)岩浆结晶锆石,它的不一致线上下交点年龄分别为1784±11Ma和448±13Ma。
短句来源
     There are also residual zircons in the two igneous bodies, ie of 2. 64-2. 70 Ga, 2. 82 Ga, 2. 93 Ga and 3. 07 Ga in Caiyu body, and 2. 63 - 2. 67 Ga and 2. 82 Ga in Dashan body.
     两个岩体中均含有数量不等、时代不同的古老残余锆石,其中在蔡峪岩体中获得 2.64~2.69 Ga、2.70 Ga、2.82 Ga、2.93 Ga和 3.07 Ga 5 组年龄,在大山岩体的残留锆石中获得 2.63~2.67 Ga和 2.82 Ga两组年龄。
短句来源
     Ion microprobe U-Pb dating of zircons from the tonalitic gneiss and quartz dioritic orthogneiss yielded statistically distinguishable 206 Pb / 238 U crystallization ages of 58.5±0.7Ma and63.5±0.8Ma ,respectively.
     对2颗片麻岩中的锆石进行了离子探针U-Pb测年,测得英云闪长质和石英闪长质片麻岩中的锆石206Pb/238U结晶年龄分别为58.5Ma±0.7Ma和63.5Ma±0.8Ma。
短句来源
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  single zircon
     From Rb- Sr isochronic age and2 0 7Pb/ 2 0 6Pb age of single zircon acquired by surface evaporation,the subvolcanics were formed at30 0~ 2 82 Ma.
     从次火山岩的Rb- Sr等时线年龄及单颗粒锆石表面蒸发法 2 0 7Pb/2 0 6Pb年龄资料看 ,次火山岩形成于 30 0~ 2 82 Ma。
短句来源
     DIRECT DETERMINATION OF ~(207) Pb/~(206)Pb APPARENT AGE BY SINGLE ZIRCON EVAPORATION
     直接蒸发单颗粒锆石测定~(207)Pb/~(206)Pb年龄的方法
短句来源
     Single zircon U Pb, 40 Ar / 39 Ar,Sm Nd and Rb Sr isochron ages suggest that the greenstone belt was formed 2700—2800 Ma ago. The ages of three types of syntectonic granites associated with the greenstone belt are (2555±35)Ma,(2515±4)Ma and 2505—2400Ma,respectively.
     单颗粒锆石UPb、40Ar/39Ar、SmNd和RbSr等时线年龄表明绿岩带形成时代为2700~2800Ma,三类同构造期花岗岩的形成时代分别为(2555±35)Ma、(2515±4)Ma和2500~2400Ma。
短句来源
     A single zircon U-Pb age of 282.3±4.6 Ma was obtained from the quartz-diorite,indicating that the suite formed in the Early Permian.
     石英闪长岩中单颗粒锆石U-Pb年龄为(282.3±4.6)Ma,表明其形成时代为早二叠世。
短句来源
     The Bainhalatu suits, however, have strong contrast between LREE and HREE, an important negative Eu abnormality and a single zircon U Pb age of 363Ma, and are typical of high SiO 2, K 2O, Rb and low CaO, FeO, MgO, Co, Sr.
     后者主要由花岗闪长岩、二长花岗岩和钾长花岗岩组成,化学成分以富SiO2、K2O、Rb和贫CaO、FeO、MgO、Co、Sr为特征,轻重稀土较强分馏,负铕异常明显,单颗粒锆石U-Pb同位素年龄为363Ma。
短句来源
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  grain zircon
     Its Pb Pb age of single grain zircon is (1 370.6±14.3) Ma.
     其单颗粒锆石PbPb同位素年龄是(1370.6±14.3)Ma。
短句来源
     The sedimentary age (2050-2400Ma) and metamorphic age (1900±100) were obtained using grain zircon U-Pb,common zircon U-Pb,zircon evapolating Pb,Sm-Nd and Rb-Sr isochron methods.
     利用单颗粒锆石U-Pb法、常规锆石U-Pb法、锆石蒸发Pb法、Sm-Nd、Rb-Sr等时线法确定八都群的成岩时代为2050-2400Ma,区域变质作用和克拉通化时间为1900±100Ma。
短句来源
     Grain zircon U-Pb dating shows that the Nankunshan granite was intruded in the middle Late Jurassic period (147±0.8 Ma).
     花岗岩锆石 U- Pb定年为 1 4 7± 0 .8Ma,应为中侏罗世—晚侏罗世侵入的。
短句来源
     Different isotopic dating methods such as K-Ar,Rb-Sr,U-Pb (including the single grain zircon Pb-Pb dating) and Sm-Nd have been used to identify Denfeng Group.
     对登封群人们先后采用过K Ar、Rb Sr、U Pb、单颗粒锆石Pb Pb、Sm Nd等多种同位素定年方法。
短句来源
     The single grain zircon UPb age (sample No. 4P28TW271) yielded an up intercept age of 2519±4Ma, 2453±59Ma,interpreted as the formation age of charnockite.
     单颗粒锆石UPb法年龄测定得到不一致线上交点年龄2519±4Ma、2543±59Ma,代表了紫苏花岗岩的形成时期;
短句来源
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  zircon
Geochemical characteristics and zircon U-Pb isotopic ages of island-arc basic igneous complexes from the Tianshui area in West Q
      
By means of the single-zircon U-Pb isotopic method, the intrusion age is reported in this paper, which is (151.7±1.6) Ma for a patched granite body (the source granite for Nb-Ta).
      
It was found that the background signal depends on the composition of the zircon crystal, including the concentration of hafnium.
      
Determination of Uranium and Thorium in Zircon, Apatite, and Fluorite: Application to Laser (U-Th)/He Thermochronology
      
Digestion procedures for apatite and fluorite are relatively straightforward, but zircon decomposition requires the use of pressure vessels or fusion.
      
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  zircons
Potentials of Electron Probe Microanalysis in Studying Zircons
      
Potentials of electron probe microanalysis in determining hafnium, uranium, thorium, lead, niobium, titanium, manganese, iron, chromium, calcium, aluminum, tin, tungsten, yttrium, and lanthanide impurities in zircons have been studied.
      
Sources of Zircons from Cretaceous and Lower Paleogene Terrigenous Sequences of the Southern Koryak Upland and Western Kamchatka
      
Age of Detrital Zircons from Sandstones of the Mesozoic Flysch Formation in the South Anyui Suture Zone (Western Chukotka)
      
This work presents first data on age estimates of detrital zircons from Upper Mesozoic terrigenous sequences of the South Anyui suture zone obtained by the fission-track method.
      
更多          
  single zircon
Early Proterozoic age of the Tyrkandin fault zone, the Aldan Shield: U-Pb dating of fragments of single zircon grains
      
First Th-U-Pb single zircon dating of metasomatites from the Belomorian mobile belt
      
Single zircon evaporation ages from Obudu Plateau: First evidence of archaean components in the schists of south-eastern Nigeria
      
single zircon ages and Sm-Nd systematics for precambrian rocks from Madagascar: Significance for correlations in East Gondwana
      
U-Pb zircon dating of metamorphic rocks of the West-Tatra using single zircon grains under cathodoluminescence control
      
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