|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | High precision in-situ Pb isotopic analysis of sulfide minerals by femtosecond laser ablation multi-collector inductively coupled plasma mass spectrometry显示文摘An in-situ microanalysis of Pb isotopic compositions in sulfide minerals is carried out by using femtosecond laser-ablation multi-collector inductively coupled plasma mass spectrometry(fs LA-MC-ICP-MS).High-temperature-activated carbon was used to filter Hg contained in the carrier gas,which reduced the Hg background signal by 48%and also lowered the detection limit of the analysis.Fractionation and mass discrimination effects existing in the ICP-MS analytical processes were corrected using an internal reference Tl in conjunction with an external reference NIST SRM 610.The proposed method was used to analyze the Pb isotopic compositions of chalcopyrite,pyrite,and sphalerite from the Dulong Sn-Zn-In polymetallic ore district.The results showed that in this ore district,the sulfide minerals and different grains of the same sulfide mineral show a large variation in Pb content up to 1000-fold.The studied pyrites show relatively higher Pb contents and homogeneous Pb isotopic compositions,whereas the sphalerites have low Pb contents but most variable Pb isotopic compositions.It is suggested that the large variation of Pb isotopic composition may reflect a late hydrothermal superimposition on the primary sulfide formation.In addition,radiogenic Pb accumulated by radioactive decay of trace amounts of U over time in the host minerals may also be one of the causes for the large variation range of Pb content and Pb isotopic composition of those low-Pb sphalerites.Chalcopyrite and sphalerite grains with Pb content greater than 10 ppm presented a consistent Pb isotopic distribution,whereas all the sulfide grains with Pb content greater than 100 ppm had consistent Pb isotopic composition within 2s measurement uncertainties.The in-situ analysis of Pb isotopic composition agreed well with the results obtained by conventional chemical methods within2s measurement uncertainties,indicating that the data obtained by fs LA-MC-ICP-MS are reliable.Additionally,this study indicates that the Pb isotopic composition could truthfully record the source of ore-forming minerals only for sulfide minerals with high Pb content.On the contrary,the Pb isotopic composition of low-Pb sulfide minerals may be affected by trace amounts of U in the host minerals that may lead to a highly radiogenic Pb isotope ratio.Alternatively,it is also possible that late fluid metasomatic overprinting may alter the Pb isotopic compositions. | YUAN HongLin YIN Cong LIU Xu CHEN KaiYun BAO ZhiAn ZONG ChunLei DAI MenNing LAI ShaoCong WANG Rong JIANG ShaoYong | 2015 | Science China Earth Sciences2015，58，10： | 14 |
| 2 | Determination of lead isotope compositions of geological samples using femtosecond laser ablation MC-ICPMS显示文摘Lead isotopic compositions of international silicate glasses,feldspar and copper-based samples are obtained using femtosecond laser ablation multiple collector inductively coupled plasma mass spectrometry(fLA-MC-ICPMS).Some international glass standards for the microanalysis are applied to evaluate the method reported here.The Pb isotopic composition of these NIST glasses(SRM 610,612,614),USGS(BHVO-2G,BCR-2G,BIR-1G and GSD-1G)and MPI-DING glasses(GOR132-G,KL2-G,T1-G,StHs60/80-G)agree well with recommended values in 2 s error.One of 15 copper-based metals is found to have homogenized Pb isotope data and can be used as an external calibration standard and quality control sample for chalcopyrite,ancient coins,etc.,to trace the genesis of metal deposit and culture exchange among different dynasties(GBW02137,208Pb/204Pb=37.9661±0.0005(2 s),207Pb/204Pb=15.5770±0.0002(2 s),206Pb/204Pb=17.7462±0.0002(2 s)).We also prepared a feldspar glass to serve as the external calibration standard/QC for Pb isotope analysis using fLA-MC-ICPMS. | YUAN HongLin CHEN KaiYun BAO ZhiAn ZONG ChunLei DAI MengNing FAN Chao YIN Cong | 2013 | Chinese Science Bulletin2013，58，32： | 5 |
| 3 | A Fast Separation Method for Isotope Analysis Based on Compressed Nitrogen Gas and Ion-Exchange Chromatography Technique--A Case Study of Sr-Nd Isotope Measurement显示文摘High-purity N_2 was used to increase the mobile phase flow rate during ion purification of ion-exchange resin. This was performed to improve the efficiency of isotope separation and purification, and to meet the efficiency requirements of rapid multiple-collector-inductively coupled plasma mass spectrometry(MC-ICPMS) analysis. For Cu isotope separation, our results indicated that at a gas flow rate >60 m L/min, the separation chromatographic peaks broadened and the recovery rate decreased to <99.2%. On the other hand, no significant change in the Cu peaks was observed at a gas flow rate of 20 m L/min and the recovery rate was determined to be >99.9%. The Cu isotope ratio, measured by the standard-sample bracketing method, agreed with reference data within a ±2 SD error range. The separation time was reduced from the traditional 10 h(without N_2) to 4 h(with N_2), indicating that the efficiency was more than doubled. Moreover, Sr and Nd isotope separation in AGV-2(US Geological Survey andesite standard sample) accelerated with a 20 m L/min gas flow, demonstrating that with the passage of N_2, the purified liquid comprised Rb/Sr and Sm/Nd ratios of <0.000 049 and <0.000 001 5, respectively. This indicated an effective separation of Rb from Sr and Sm from Nd. MC-ICPMS could therefore be applied to accurately determine Sr and Nd isotope ratios. The results afforded were consistent with the reference data within a ±2 SD error range and the total separation time was shortened from 2 d to <10 h. | Honglin Yuan Xu Liu Zhian Bao Kaiyun Chen Chunlei Zong | 2018 | Journal of Earth Science2018，29，1： | 4 |
| 4 | Simultaneous Measurement of Major, Trace Elements and Pb Isotopes in Silicate Glasses by Laser Ablation Quadrupole and Multi-Collector Inductively Coupled Plasma Mass Spectrometry显示文摘A method was developed for the rapid in situ analysis of major and trace elements and Pb isotopes in silicate glass samples that combines laser ablation quadrupole and multi-collector inductively coupled plasma mass spectrometry(LA-Q-ICP-MS/MC-ICP-MS). Major, trace elements, and Pb isotope ratio compositions were clearly affected by laser conditions. Using a laser spot size of 160 μm, a laser ablation frequency of 15 Hz, an energy density 18 J/cm^2, and a 1 : 9 ratio of laser ablation aerosol to the corresponding makeup gas, we obtained accurate major and trace element contents and Pb isotope ratios. Using Ca as the internal standard element, and GSE-1G and NIST 610 as the external standards for calibration, element contents generally matched the preferred values within 15%. Higher relative errors for some elements(e.g., Cr, Ga, Ge) may have been caused by lower than recommended values in some standards. The exponential law correction method for Tl normalization, with optimum adjusted Tl ratio, was utilized to obtain Pb isotopic data with good precision and accuracy. Pb isotopic ratios of the glass reference materials were in good agreement with the reference or published values to within 2 s measurement uncertainties, and the analytical precision was better than 0.17%(e.g., ^(208)Pb/^(206)Pb). The developed method is a simple, reliable, and accurate technique for determining major, trace elements, and Pb isotope compositions of silicate glasses and minerals within a single ablation event. | Mengning Dai Zhi'an Bao Kaiyun Chen Chunlei Zong Honglin Yuan | 2017 | Journal of Earth Science2017，28，1： | 4 |
| 5 | Determination of Hf–Sr–Nd isotopic ratios by MC-ICP-MS using rapid acid digestion after flux-free fusion in geological materials显示文摘In this study, we established a rapid acid digestion for determining Hf–Sr–Nd isotopic ratios of geological samples by using MC-ICP-MS. Conditions of 1600 °C for 1 min and 1400 °C for 1 min were adopted for fusing intrusive rocks and extrusive rocks, respectively. The rapid acid digestion technique is superior in digestion time compared with high-pressure PTFE bomb method. The procedural blanks of the method were also lower than that flux fusion. Replicate analyses of international certified reference materials(CRMs) indicate that isotopic ratios of ^(176)Hf/^(177)Hf,^(87)Sr/^(86)Sr and^(143)Nd/^(144)Nd agree well with previously published data. The external reproducibility(2 SD, n = 5) of ten CRMs are ±0.000030 for87 Sr/86 Sr,±0.000030 for ^(143)Nd/^(144)Nd, and ±0.000018 for ^(176)Hf/^(177)Hf. | Zhian Bao Chunlei Zong Linru Fang Honglin Yuan Kaiyun Chen Mengning Dai | 2018 | Acta Geochimica2018，37，2： | 3 |
| 6 | Geo- chemical constraints on a mixed pyroxenite - peridotite source for East Pacific Rise basalts显示文摘 | ZHANG Guoliang ZONG ChunLei YIN Xuebo | 2012 | Chemical Geology2012，，： | 1 |
| 7 | In-situ synthesis of gadolinium niobate quasi-binary composites with balanced mechanical and thermal properties for thermal barrier coatings显示文摘Yttria-stabilized zirconia(YSZ)has been used as a thermal barrier coating(TBC)material in gas turbines for several decades.Although continuous efforts have been made to develop novel TBC materials that can work at a higher temperature,no single material other than YSZ has all the desired attributes for the TBCs.In this paper,we report the in-situ synthesis of quasi-binary GdNbO_(4)/Gd_(3)NbO_(7)composites based on the simple Gd_(2)O_(3)-Nb_(2)O_(5)binary phase diagram.The fracture toughness of these quasi-binary composites is remarkably enhanced compared with the value predicted by the rule of mixtures because the ferroelastic domain switching is more activated due to the residual stress in the quasi-binary composites,which triggers more crack defections due to the enlarged process zone.Additionally,the Gd_(3)NbO_(7)phase provides a low thermal conductivity due to the substantial chemical inhomogeneity,which diffuses phonons.Gd_(3)NbO_(7)/GdNbO_(4)exhibits a balanced thermal conductivity of 1.6 W/(m·K)at 1073 K and a toughness value of 2.76 MPa·m0.5,and these values are among the best comprehensive properties that have been obtained for new TBC materials.The work demonstrates a feasible approach of designing a new TBC material with balanced properties and can be easily fabricated. | Yi HAN Peng-an ZONG Muzhang HUANG Zesheng YANG Yingjie FENG Wei PAN Peng ZHANG Chunlei WAN | 2022 | Journal of Advanced Ceramics2022，11，9： | 0 |
| 8 | Magnesium Isotopic Homogeneity of GSR-1 and RGM-2: Two Potential Standards for Mg Isotope Analysis of Low MgO Felsic Rocks显示文摘In sample preparation and mass spectrometry analysis,sample dissolution,column chemistry,concentration mismatches,and matrix effects have significant potential for introducing analytical artifacts during Mg isotope analysis.Based on the low MgO content and undesirable matrix elements in felsic rocks,the development of well-characterized felsic standards is essential to reduce inter-laboratory mass bias,enable the assessment of data accuracy,and facilitate the comparison of chemical separation procedures in different laboratories.In this work,the homogeneity and long-term stability of two felsic rock standards,GSR-1 and RGM-2,were evaluated due to their low MgO contents.Furthermore,synthetic solutions with doped matrix elements were used to evaluate potential Mg isotope analytical artifacts using multi-collector inductively coupled plasma mass spectrometry.The accuracy and precision of Mg isotopic compositions in GSR-1 and RGM-2 were assessed by repeated measurements over twelve months.The long-term tests show that the Mg isotopic compositions of the two low MgO felsic rocks(GSR-1 and RGM-2)are homogenous among batches and can be used as low MgO reference materials for accuracy assessments of Mg isotopic analyses.The Mg isotopic compositions(δ26Mg)of GSR-1 and RGM-2 were marked as-0.223‰±0.053‰(2s,n=50)and-0.184‰±0.058‰(2s,n=50)respectively. | Lu Chen Zhian Bao Honglin Yuan Kaiyun Chen Chunlei Zong | 2020 | Journal of Earth Science2020，31，2： | 0 |
| 9 | HIGH PIEZOELECTRIC PERFORMANCE AND RELEVANT PHYSICAL MECHANISM OF CuO-MODIFIED Ba(Ti_(0.96)Sn_(0.04))O_(3)CERAMICS显示文摘Ba(Ti_(0.96)Sn_(0.04))O_(3)and CuO-modified Ba(Ti_(0.96)Sn_(0.04))O_(3)ceramics were prepared by the solid state reaction technique.Their piezoelectric properties were investigated and compared with those of the recently obtained high-d_(33)BaTiO_(3)ceramic.It has been found that simply substituting Ti4t with Sn4t worsens severely the piezoelectric properties whereas a combined usage of CuO additive greatly improves the overall piezoelectric performance.CuO-modified BaeTi_(0.96)Sn_(0.04)TO_(3)ceramic shows excellent piezoelectric properties of d_(33)=390 pC=N;kp=0.49 and k33=0.67 at room temperature.Furthermore,it possesses weak temperature dependences of electromechanical coe±cients between20 and 55 and a good thermal aging stability down to a low experimental temperature limit of50℃and up to 90.Detailed analysis suggests that its high piezoelectric performance should be largely ascribed to the ideal microstructure of high relative density and small grains and the corresponding domain configurations. | JIALIANG ZHANG ZONG ZHANG SHOUFU SHAO PENG ZHENG CHUNLEI WANG | 2011 | Journal of Advanced Dielectrics2011，1，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员