Quantitative analysis of trace OH in garnet and pyroxenes

Bell, David R.; Ihinger, Phillip D.; Rossman, George R.

doi:10.2138/am-1995-5-607

Cited by 430 publications

(405 citation statements)

References 15 publications

Supporting

Mentioning

357

Contrasting

Unclassified

Order By: Relevance

“…The infrared spectra were integrated from 3300 to 3700 cm À1 . For pyrope-rich garnet, the water content obtained from the extinction coefficient of [Bell et al, 1995] is approximately 2-3 times greater than the water content determined from the [Paterson 1982] calibration. The reason for this difference is not well understood and we use both calibrations to compare our results with others.…”

Section: Methodsmentioning

confidence: 80%

“…The absorption spectra showed no evidence of saturation. The absorption coefficient of e = 6700 ± 670 (Lmol À1 cm 2 ) [Bell et al, 1995] was used to calculate the water contents in pyrope-rich garnet. In addition, the absorption coefficient function of [Paterson, 1982] was also used to calculate the water contents.…”

Section: Methodsmentioning

confidence: 99%

“…The lines represent the thermodynamic model of water solubility for mantle minerals [Keppler and Bolfan-Casanova, 2006], broken line for olivine shows the 3.5x [Kohlstedt et al, 1996] model; open circles, filled circle, and rhombs are from present work. We have assumed 10% uncertainty associated with measurement of sample thickness and absorption coefficient of e = 6700 ± 670 (Lmol À1 cm 2 ) [Bell et al, 1995].…”

Section: Geophysical Significancementioning

confidence: 99%

See 2 more Smart Citations

Solubility of water in pyrope‐rich garnet at high pressures and temperature

Mookherjee

Karato

2010

Geophysical Research Letters

View full text Add to dashboard Cite

[1] The water solubility in pyrope-rich garnet was determined between pressures of 5-9 GPa and temperatures of 1373 -1473 K under silica activity and oxygen fugacity similar to those expected in the Earth's upper mantle. We found that pyrope-rich garnet has substantial water solubility up to $0.1 wt% under these conditions. In addition, the water content in garnet varied as a function of chemical conditions. In particular, the variation in water fugacity (and Mg#) caused a variation in water partitioning with olivine (D H 2 O ol/py ). The substantial water solubility in pyrope-rich garnet under deep upper mantle conditions might have significant influence on physical and transport properties.Citation: Mookherjee, M., and S. Karato (2010), Solubility of water in pyrope-rich garnet at high pressures and temperature, Geophys. Res. Lett., 37, L03310,

show abstract

Section: Methodsmentioning

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Section: Geophysical Significancementioning

confidence: 99%

See 1 more Smart Citation

Solubility of water in pyrope‐rich garnet at high pressures and temperature

Mookherjee

Karato

2010

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…To quantitatively estimate the water content of the aggregates from 150-Hm-thick samples, we used Beer-Lambert's law and a molar extinction coefficient of 32 L(H2O) mol -• crn -• [Beran, 1987]. This technique probably yields an upper limit for the water content [Bell et al, 1995]. Absorbance spectra for typical wet and dry samples are given in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Dislocation and diffusion creep of synthetic anorthite aggregates

Rybacki¹,

Dresen²

2000

J. Geophys. Res.

266

272

View full text Add to dashboard Cite

show abstract

“…Even in the fundamental papers concerning the extinction coefficient of H2O for NAMs in granulites the concentration is always given in ppm (wt. %) (Bell et al, 1995(Bell et al, , 2003Johnson and Rossman, 2003; Thomas et al 2009; Maldener et al, 2001). We admit that there are a few number of papers (i.e., Zhao et al, 2004) where the concentration of H2O is given in H/106Si, however, these papers are rather exceptional than usual from this points of view.…”

Section: Powered By Editorial Manager® and Produxion Manager® From Armentioning

confidence: 99%

Melting, fluid migration and fluid-rock interactions in the lower crust beneath the Bakony-Balaton Highland volcanic field: a silicate melt and fluid inclusion study

et al. 2015

View full text Add to dashboard Cite

Plio-Pleistocene alkali basalt hosted mafic garnet granulite xenoliths were studied from the Bakony-Balaton Highland Volcanic Field (BBHVF) to trace fluid-melt-rock interactions in the lower crust. Two unique mafic garnet granulite samples were selected for analyses (optical microscopy, microthermometry, electron microprobe, Raman and IR spectroscopy), which contain clinopyroxene-plagioclase vein and patches with primary silicate melt inclusions (SMI). The samples have non-equilibrium microtexture in contrast with overwhelming majority of previously studied mafic garnet granulite xenoliths. Primary silicate-melt inclusions were observed in plagioclase, clinopyroxene and ilmenite in both xenoliths. The SMI-bearing minerals located randomly in Mi26 and in a clinopyroxene-plagioclase vein on the edge of Sab38 granulites. Petrography, fluid and melt inclusion study suggests that at least three fluid events occurred in the deep crust represented by these xenoliths. 1. Primary CO2-dominated±CO±H2S fluid inclusions were observed in the wall-rock part of Sab38 xenolith. 2. The crystallization of new clinopyroxene from melt, with CO2+H2O fluid. 3. The crystallization of new plagioclase occurred in a heterogeneous fluid-melt system with additional N2 and CH4 during crystallization. A local reaction was observed between sphene and acidic melt, which formed ilmenite+clinopyroxene+plagioclase±orthopyroxene.The 'water' content of the rock forming minerals was determined by infrared spectroscopy. The calculated bulk 'water' content of the Mi26 xenolith is 171±51 ppm Powered by Editorial Manager® and ProduXion Manager® from Aries Systems Corporationwt. %. The bulk wall rock part of the Sab38 granulite contains 55±17 ppm wt. % of 'water', whereas the bulk plagioclase-clinopyroxene vein contains 278±83 ppm wt. %. These results imply a very dry lower crust, locally hydrated by percolating fluids and melts.Response to Reviewers: Replies to the comments of the Reviewer #1 and to the general comments of Reviewer #2.Reviewer #1: Page 2 Line 49: thinner or thicker?We corrected the word in question.Page 3 Line 18: Please describe the precision and accuracy of the energy-dispersive method.We clarified the asked method in the 'Analytical technique' section.Page 3 Line 46: "atmpspheric" should be "atmospheric". We corrected the word in question. Page 4 Line 6: Please delete the word "selected" or "studied". We deleted the unnecessary word.Page 6 line 7: Please describe how you estimate the errors of P-T. Sources of error considered include: accuracy of the experimentally located, barometric end-member reaction, volume measurement errors, analytical imprecision, uncertainty of electron microprobe standard compositions, thermometer calibration errors, variation in the different mineral assemblage activity models, and compositional heterogeneity of natural minerals (Kohn and Spear, 1991). We clarified the asked method in the 'Geothermo-barometry' section. Page 6 Line 50: "isochor" should be "isochore". We corrected the world in ques...

show abstract

Quantitative analysis of trace OH in garnet and pyroxenes

Cited by 430 publications

References 15 publications

Solubility of water in pyrope‐rich garnet at high pressures and temperature

Solubility of water in pyrope‐rich garnet at high pressures and temperature

Dislocation and diffusion creep of synthetic anorthite aggregates

Melting, fluid migration and fluid-rock interactions in the lower crust beneath the Bakony-Balaton Highland volcanic field: a silicate melt and fluid inclusion study

Contact Info

Product

Resources

About