搜索结果: 1-15 共查到“地质学 spectroscopy”相关记录82条 . 查询时间(0.246 秒)
中国科学院广州地球化学研究所崔泽贤等-Atomic Spectroscopy：SIMS测试锆石氢同位素组成和水含量的分析方法以及标准物质的开发（图）
崔泽贤 锆石氢 同位素 岩浆演化
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2023/8/4
确定水的含量和同位素组成对理解行星体的形成和演化具有重要意义。锆石是一种普遍存在于各类岩石中具有稳定的物理化学性质的副矿物，耐高温（1000℃）、耐机械磨蚀和化学腐蚀，且具有较低的扩散系数，因此被广泛应用于U–Pb定年、Li–O–Hf同位素体系以及Ti温度计等多种地球化学研究。此前，本研究课题组成功开发出利用二次离子质谱仪（Secondary ion mass spectroscopy, SIMS...
Comparison of water isotope analysis between cavity ring-down spectroscopy and isotope ratio mass spectrometry
oxygen isotopes hydrogen isotopes water isotope ratio mass spectrometry (IRMS) cavity ring-down spectroscopy (CRDS)
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2017/4/10
δD and δ18O of natural waters with δ18O ranging from –24 to –6‰ were measured using a cavity ring-down spectroscopy
(CRDS) in order to confirm that the CRDS method can be an alternative to convention...
High-precision measurements of water isotopes using laser absorption spectroscopy
oxygen isotopes hydrogen isotopes water laser absorption spectroscopy Off-Axis Integrated Cavity
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2017/4/11
Hydrogen and oxygen isotopic analysis using an off-axis integrated-cavity output spectroscopy (OA-ICOS) was carefully
checked for long-term stabilities, dependence on the injected water volume, inter...
Thermal analysis and Hot-stage Raman spectroscopy of the basic copper arsenate mineral
Copper Arsenate Olivenite Cornwallite Cornubite Clinoclase thermal stage Raman spectroscopy Euchroite
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2011/11/10
The thermal analysis of euchroite shows two mass loss steps in the temperature range 100–105 °C and 185–205 °C. These mass loss steps are attributed to dehydration and dehydroxylation of the mineral. ...
Thermogravimetric analysis and hot-stage Raman spectroscopy of cubic indium hydroxide
Thermogravimetry Hot-stage Raman spectroscopy Indium hydroxide Indium oxide
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2011/11/10
The transition of cubic indium hydroxide to cubic indium oxide has been studied by thermogravimetric analysis complimented with hot-stage Raman spectroscopy. Thermal analysis shows the transition of I...
Temporal variation in chemical composition of the volcanic plume from Aso volcano, Japan, measured by remote FT-IR spectroscopy
volcanic gas hydrothermal interaction crater lake remote FT-IR spectroscopy Aso volcano
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2017/8/10
Remote measurements of chemical compositions of the Aso volcanic plume using an FT-IR spectral radiometer were carried out at the 1st crater of Mt. Nakadake, Aso volcano, Japan, for six times from 199...
On the structure of palygorskite by mid- and near-infrared spectroscopy
IR spectroscopy palygorskite NIR spectroscopy Fe-rich hormite hydration
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2011/11/4
The OH-structural characteristics of an iron-rich palygorskite from Western Macedonia, Greece (Gr-1) and an aluminous palygorskite from Florida (PFl-1) were examined by combined Fourier-transform near...
Chromate Removal by Dithionite-Reduced Clays: Evidence from Direct X-Ray Adsorption Near Edge Spectroscopy (Xanes) of Chromate Reduction at Clay Surfaces
Illite IMt-2 Kaolinite KGa-2 Montmorillonite Reduction Smectite Sorption SWa-1 SWy-1 XANES
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2011/12/6
Abstract: Chromium(VI) in the environment is of particular concern because it is toxic to both plants and animals, even at low concentrations. As a redox-sensitive element, the fate and toxicity of ch...
Dielectric-Relaxation Spectroscopy of Kaolinite, Montmorillonite, Allophane, and Imogolite under Moist Conditions
Allophane Bound Water Complex Permittivity Dielectric-Relaxation Spectroscopy Imogolite Interfacial Polarization Kaolinite Montmorillonite Time-Domain Reflectometry
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2011/12/2
Abstract: The dielectric behavior of kaolinite, montmorillonite, allophane, and imogolite samples adjusted to a water potential of 33 kPa was examined using a time-domain reflectometry method over a w...
Structural Chemistry of Fe, Mn, and Ni in Synthetic Hematites as Determined by Extended X-Ray Absorption Fine Structure Spectroscopy
EXAFS Fe Oxides Hematite Metal Substitution Trace Elements XAS XRD
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2011/12/6
Abstract: The incorporation of transition metals into hematite may limit the aqueous concentration and bioavailabity of several important nutrients and toxic heavy metals. Before predicting how hemati...
Iron-Oxide Mineralogy of a Mollisol from Argentina: A Study by Selective-Dissolution Techniques, X-Ray Diffraction, and Mossbauer Spectroscopy
Ammonium-Oxalate Dissolution Treatment Chemical Analysis Dithionite-Citrate-Bicarbonate Dissolution Treatment Dithionite-Ethylenediaminetetraacetic Acid Dissolution Treatment
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2011/12/6
Abstract: Selective-dissolution techniques by ammonium oxalate (OX), dithionite-citrate-bicarbonate (DCB), and dithionite-ethylenediaminetetraacetic acid (D-EDTA), and X-ray diffraction and M鰏sbauer s...
Reduction and Sorption of Chromium by Fe(II)-Bearing Phyllosilicates: Chemical Treatments and X-Ray Absorption Spectroscopy (XAS) Studies
Absorption Chromium EXAFS Phyllosilicates Reduction XANES
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2011/12/6
Abstract: The reduction of hexavalent chromium species in aqueous solutions by interaction with Fe(II)-bearing solid surfaces was studied using a 0.96 × l0−3 M Cr(VI) solution and iron-rich clay...
Characterization of Octahedral Substitutions in Kaolinites Using Near Infrared Spectroscopy
Kaolinites Near Infrared Spectroscopy Octahedral Substitution
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2011/12/2
Abstract: Fourier transform infrared (FTIR) spectroscopy investigations in the near infrared (NIR) region of synthetic and natural kaolinites with various octahedral substitutions have been carried ou...
Local Ca-Mg distribution of Mg-rich pyrope-grossular garnets synthesized at different temperatures revealed by 29Si MAS NMR spectroscopy
Local Ca-Mg distribution Mg-rich pyrope-grossular garnets synthesized different temperatures revealed 29Si MAS NMR spectroscopy
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2012/4/1
Pyrope-grossular solid solutions, (Mg,Ca) Al Si O , of composition Py Gr and Py Gr were3 2 3 12 85 15 75 25
synthesized at 1000, 1200, and 1400 ?C and 30 kbars in a piston-cylinder device. The synt...
Spectroscopy Study of Arsenite [As(III)] Oxidation on Mn-Substituted Goethite
Arsenate Arsenite Mn-Substituted Goethite Oxidation XANES
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2011/12/7
Abstract: Mn-substituted goethite was synthesized and the interaction between arsenite (As(III)) and Mn-substituted goethite was investigated by both solution chemistry and X-ray adsorption near edge ...