Measurements of water content and D/H ratio in apatite and silicate glasses using a NanoSIMS 50L

Hu, Sen; Ye, Lin; Zhang, Jianchao; Hao, Jialong; Yang, Wei; Deng, Liwei

doi:10.1039/c4ja00417e

Cited by 31 publications

(57 citation statements)

References 26 publications

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“…(), Hu et al . (), where the measured mass fractions are low. Since a small number of publications have dealt with hydrous minerals, it is necessary to see whether vacuum also has a measurable effect when analysing hydrous minerals.…”

Section: Resultsmentioning

confidence: 93%

Accurate Measurements of H₂O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry

Siron

Baumgartner

Bouvier

et al. 2018

Geostandard Geoanalytic Res

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Five biotite reference materials (RMs) currently used for oxygen isotope measurements at the SwissSIMS laboratory (University of Lausanne) were investigated for their H2O, F and Cl contents using secondary ion mass spectrometry in negative mode. The homogeneity of these RMs, as well as that of the international reference material NBS30, was tested by exploiting the high sensitivity of the SIMS technique. No crystal orientation dependency was discovered at the level of the homogeneity of the RMs. Normalisation schemes with 28Si−, 30Si− 16O− and 18O− were explored. A matrix effect is documented here for H2O measurements, which depended on SiO2 and XMg compositions of the different biotite RMs. A successful multivariate fit was obtained that reproduces the H2O content of the six biotite RMs, this within error of 0.15% m/m and with a reduced χ2 (or MSWD) of 0.672. Fluorine and Cl contents were calibrated using a linear fit for F content between 0% and 4% m/m and Cl content below 0.3% m/m. Accuracy for H2O measurements is expected to be 3–4% (1SE). Accuracy for F content was about 3% (1s) and typically about 15% (1s) for Cl content.

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Section: Resultsmentioning

confidence: 93%

Accurate Measurements of H₂O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry

Siron

Baumgartner

Bouvier

et al. 2018

Geostandard Geoanalytic Res

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“…; Hu et al. , ). After baking for 12 h at ~60 °C in the NanoSIMS airlock, the sample was stored in the sample chamber before analysis.…”

Section: Sample and Experimentsmentioning

confidence: 98%

“…The multi‐collection isotope mode was used to count the secondary ions 1 H − , 2 D − , 12 C − , and 18 O − (Hu et al. ). Each 10 × 10 μm 2 analysis area was rastered with a Cs + beam with ~0.5 nA current and a probe diameter of ~500 nm.…”

Section: Sample and Experimentsmentioning

confidence: 99%

Ancient geologic events on Mars revealed by zircons and apatites from the Martian regolith breccia NWA 7034

Lin

Zhang

et al. 2019

Meteorit & Planetary Scien

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Zircons and apatites in clasts and matrix from the Martian breccia NWA 7034 are well documented, timing ancient geologic events on Mars. Furthermore, in this study, zircon trace elemental content, apatite volatile content, and apatite volatile isotopic compositions measured in situ could constrain the evolution of those geologic events. The U‐Pb dates of zircons in basalt, basaltic andesite, trachyandesite igneous clasts, and the matrix are similar (4.4 Ga) suggesting intense volcanism on ancient Mars. However, two metamict zircon grains found in the matrix have an upper intercept date of ~4465 Ma in crystalline, whereas amorphous areas have a lower intercept date of 1634 ± 93 Ma. The younger date is consistent with the date of apatites (1530 ± 65 Ma), suggesting a metamorphic event that completely reset the U‐Pb system in both the amorphous areas of zircon and all apatites. δD values in all apatites negatively correlate with water content in a two‐endmember mixing trend. The D (δD up to 2459‰) and 37Cl heavy core (3.8‰) of a large apatite grain suggest a D‐, 37Cl‐rich fluid during the metamorphic event ~1.6 Ga ago, consistent with the trace elements Y, Hf and Ti and P in zircons. The fluid was also therefore P‐rich. The D‐, 37Cl‐poor H2O‐rich rim (<313‰) suggests the degassing of water from the Martian Cl‐poor interior at a later time. This D‐, 37Cl‐poor Martian mantle reservoir could have derived from volcanic intrusions postdating the younger metamorphic event recorded in NWA 7034.

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“…Redeposition of sputtered materials is another major source of water surface contamination, which can be recognized by a higher OH − intensity along the margins of the analyzed area . The blanking technique can eliminate this interference in NanoSIMS 50L, which integrate signals only from the predefined inner region of the sputtering area.…”

Section: Optimization Of Sims Parametersmentioning

confidence: 99%

“…This requirement limits the application of FTIR to small‐sized samples (<100 μm) . Secondary ion mass spectrometry (SIMS) provides insitu micromeasurements of elemental and isotopic compositions in selected millimeter‐ to centimeter‐sized solid sample for almost all elements in nature and is ideal for measuring the water content in NAMs . Moreover, SIMS can simultaneously yield water content and oxygen isotope compositions, which are essential to trace the origin of water .…”

Section: Introductionmentioning

confidence: 99%

Optimization of SIMS analytical parameters for water content measurement of olivine

Zhang

Xia

Takáhashi

et al. 2019

Surface & Interface Analysis

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Secondary ion mass spectrometry (SIMS) has a wide range of applications in Earth Science research, thanks to its high precision and sensitivity, and its capacity in direct insitu micromeasurement. The technique is operated in ultra‐high vacuum (UHV) conditions, especially for the measurement of volatiles such as hydrogen, or the water content in nominally anhydrous minerals (NAMs). To minimize the water background and obtain accurate and precise water contents in NAMs (eg, olivine) critical parameters such as presputtering time, field aperture (FA), dynamic transfer on/off, and primary beam current intensity were investigated for a CAMECA IMS 1280‐HR system. When the chamber vacuum reaches approximately 2 × 10−9 mbar, we set the DTOS OFF, raster size to 50 μm and primary beam current to 5 nA, and used 2000 μm FA and 170‐second presputtering time. Consequently, an approximately 1.2 ppmw water background and 3.6 ppmw limit of detection (LOD) were yielded, from analyzing the San Carlos olivine. Meanwhile, the water content and homogeneity of a range of olivine minerals were characterized for potential use as reference materials for SIMS water content measurement. Olivine water content calibration curve was also established by comparing the Fourier transform infrared (FTIR) results with the SIMS‐measured 16O1H−/16O− ratios. Accuracy and precision of water content measurement were estimated to be better than approximately 10% in this study.

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Measurements of water content and D/H ratio in apatite and silicate glasses using a NanoSIMS 50L

Cited by 31 publications

References 26 publications

Accurate Measurements of H₂O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry

Accurate Measurements of H₂O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry

Ancient geologic events on Mars revealed by zircons and apatites from the Martian regolith breccia NWA 7034

Optimization of SIMS analytical parameters for water content measurement of olivine

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Measurements of water content and D/H ratio in apatite and silicate glasses using a NanoSIMS 50L

Cited by 31 publications

References 26 publications

Accurate Measurements of H2O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry

Accurate Measurements of H2O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry

Ancient geologic events on Mars revealed by zircons and apatites from the Martian regolith breccia NWA 7034

Optimization of SIMS analytical parameters for water content measurement of olivine

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Accurate Measurements of H₂O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry

Accurate Measurements of H₂O, F and Cl Contents in Biotite Using Secondary Ion Mass Spectrometry