Determination of diffusion coefficients of hydrogen in fused silica between 296 and 523K by Raman spectroscopy and application of fused silica capillaries in studying redox reactions

Shang, Liang; Chou, I‐Ming; Lü, Wanjun; Burruss, Robert C.; Zhang, Youxue

doi:10.1016/j.gca.2009.06.001

Cited by 39 publications

(23 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We note that Chou et al (2008) conducted their experiments in fused silica capillaries, which are permeable to hydrogen and therefore promotes the hydrogen-producing reaction (i.e., formation of methanol). Shang et al (2009) also reported that the diffusion coefficient of hydrogen in fused capillaries at 296 K is about an order of magnitude higher than that of platinum at 723 K (our experimental temperatures were 573-773 K). This may explain why methanol was detected in the experiments of Chou et al (2008) but not in ours.…”

Section: Effect Of Formation Conditions On Fluid Compositionsupporting

confidence: 50%

Synthetic fluid inclusions XVIII: Experimental determination of the PVTX properties of H2O–CH4 to 500°C, 3 kbar and XCH4 ⩽4 mol.%

Lin

Bodnar

2010

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Section: Effect Of Formation Conditions On Fluid Compositionsupporting

confidence: 50%

Synthetic fluid inclusions XVIII: Experimental determination of the PVTX properties of H2O–CH4 to 500°C, 3 kbar and XCH4 ⩽4 mol.%

Lin

Bodnar

2010

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

“…The D/H ratios were analysed in the H 2 gas using a Thermo Finnigan delta XP mass spectrometer using a GASBENCH II equipment as a tube-cracker and inlet port (see Demény and Siklósy (2008) for the manual measurement protocol). As one of the reviewers kindly called our attention, hydrogen can diffuse through heated silica even at rather low temperature (<300 °C, Shang et al 2009), contamination from the ambient atmosphere may occur especially at the high temperatures used in this study, thus, determination of blank level is important to assess the analyses' accurracy. Blank measurements were conducted twice during this study, yielding about 0.5 micromole H 2 .…”

Section: Samples and Analytical Techniquesmentioning

confidence: 99%

Hydrogen isotope compositions in carbonado diamond: constraints on terrestrial formation

Demény

Nagy

Bajnóczi

et al. 2011

Central European Geology

View full text Add to dashboard Cite

In this study we report the first hydrogen isotope composition analyses on carbonado diamond along with cathodoluminescence and scanning electron microscopic imaging, electron microprobe analyses, and stable (H and C) and radiogenic (Sr) isotope measurements. The hydrogen of bulk carbonado (consisting diamond and pore-filling minerals) yielded ~ -4‰, consistent with usual crustal or mantle-derived fluids. The diamond-related hydrogen component is about 70 ± 30 ppm and shows a D-depletion down to -200‰. Determined H isotope values -together with C isotope compositions -overlap the ranges for mantle-derived hydrocarbons. Textural characteristics and Sr isotope ratios of pore-filling florencite indicate that the carbonado was formed in a fluid-rich environment, underwent a significant high-temperature influence and finally suffered thorough alteration. Based on these observations, a terrestrial formation during interaction of mantle rocks/melts or subducted crustal materials and reduced C-H fluids seems to be more plausible than an extraterrestrial origin.

show abstract

“…As a result, FSCCs are used in many research fields. For example, in addition to construction of synthetic fluid inclusions [46,53,118], FSCCs were used in studying the properties of hydrothermal fluids as optical and Raman spectroscopic cells [115][116][117][119][120][121]. FSCCs were also used as reactors in investigating the mechanism of thermochemical sulfate reduction [114] and the decomposition of organic matter [57].…”

Section: Implications For High P-t Experiments Using Fused Silicamentioning

confidence: 99%

An Experimental Study of the Formation of Talc through CaMg(CO₃)₂–SiO₂–H₂O Interaction at 100–200°C and Vapor-Saturation Pressures

et al. 2017

Self Cite

View full text Add to dashboard Cite

The metamorphic interaction between carbonate and silica-rich fluid is common in geological environments. The formation of talc from dolomite and silica-rich fluid occurs at low temperatures in the metamorphism of the CaO-MgO-SiO 2 -CO 2 -H 2 O system and plays important roles in the formation of economically viable talc deposits, the modification of dolomite reservoirs, and other geological processes. However, disagreement remains over the conditions of talc formation at low temperatures. In this study, in situ Raman spectroscopy, quenched scanning electron microscopy, micro-X-ray diffraction, and thermodynamic calculations were used to explore the interplay between dolomite and silica-rich fluids at relatively low temperatures in fused silica tubes. Results showed that talc formed at ≤200 ∘ C and low CO 2 partial pressures (PCO 2 ). The reaction rate increased with increasing temperature and decreased with increasing PCO 2 . The major contributions of this study are as follows: (1) we confirmed the formation mechanism of Mg-carbonate-hosted talc deposits and proved that talc can form at ≤200 ∘ C; (2) the presence of talc in carbonate reservoirs can indicate the activity of silica-rich hydrothermal fluids; and (3) the reactivity and solubility of silica require further consideration, when a fused silica tube is used as the reactor in high P-T experiments.

show abstract

Determination of diffusion coefficients of hydrogen in fused silica between 296 and 523K by Raman spectroscopy and application of fused silica capillaries in studying redox reactions

Cited by 39 publications

References 27 publications

Synthetic fluid inclusions XVIII: Experimental determination of the PVTX properties of H2O–CH4 to 500°C, 3 kbar and XCH4 ⩽4 mol.%

Synthetic fluid inclusions XVIII: Experimental determination of the PVTX properties of H2O–CH4 to 500°C, 3 kbar and XCH4 ⩽4 mol.%

Hydrogen isotope compositions in carbonado diamond: constraints on terrestrial formation

An Experimental Study of the Formation of Talc through CaMg(CO₃)₂–SiO₂–H₂O Interaction at 100–200°C and Vapor-Saturation Pressures

Contact Info

Product

Resources

About

Determination of diffusion coefficients of hydrogen in fused silica between 296 and 523K by Raman spectroscopy and application of fused silica capillaries in studying redox reactions

Cited by 39 publications

References 27 publications

Synthetic fluid inclusions XVIII: Experimental determination of the PVTX properties of H2O–CH4 to 500°C, 3 kbar and XCH4 ⩽4 mol.%

Synthetic fluid inclusions XVIII: Experimental determination of the PVTX properties of H2O–CH4 to 500°C, 3 kbar and XCH4 ⩽4 mol.%

Hydrogen isotope compositions in carbonado diamond: constraints on terrestrial formation

An Experimental Study of the Formation of Talc through CaMg(CO3)2–SiO2–H2O Interaction at 100–200°C and Vapor-Saturation Pressures

Contact Info

Product

Resources

About

An Experimental Study of the Formation of Talc through CaMg(CO₃)₂–SiO₂–H₂O Interaction at 100–200°C and Vapor-Saturation Pressures