Tony Withers: Research

 

Research

Obviously this page isn't finished. There's some fun stuff lurking here, though...


Water in the Earth's interior

Trace element partitioning

Volatiles in melts

D/H isotopes

Equation of state for water

High pressure experiments


Publication list


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Water in the Earth's interior

polarised IR


Trace element partitioning


Volatiles in melts

 


D/H isotopes in the Earth

poster presented at Fall AGU, 2003


Equation of state for water

Fugacity calculator


High pressure experiments

 

 
The multi-anvil at the University of Minnesota. Pressure and temperature control is fully automated: simply set the pressure and temperature for your experiment in the computer interface, go back to your office and check the progress of your experiment on the web. Look out for progress reports in your email inbox!

 


Publication list

View these publications in their own page

C. Crépisson, M. Blanchard, H. Bureau, C. Sanloup, A.C. Withers, H. Khodja, S. Surblé, K. Béneut, C. Leroy, P. Giura and E. Balan (2014). Clumped fluoride-hydroxyl defects in forsterite: Implications for the upper-mantle. Earth and Planetary Science Letters. 390: 287-295. doi: 10.1016/j.epsl.2014.01.020

B.D. Stanley, M.M. Hirschmann and A.C. Withers (2014) Solubility of C-O-H volatiles in graphite-saturated martian basalts. Geochimica et Cosmochimica Acta. 129: 54-76. doi: 10.1016/j.gca.2013.12.013

P. Ardia, M.M. Hirschmann, A.C. Withers and B.D. Stanley (2013) Solubility of methane in a synthetic basaltic melt, with applications to atmosphere-magma ocean-core partitioning of volatiles and to the evolution of the martian atmosphere. Geochimica et Cosmochimica Acta. 114: 52-71. doi: 10.1016/j.gca.2013.03.028

M.A. Bouhifd, A. Whittington, A.C. Withers and P. Richet (2013) Heat capacities of hydrous silicate glasses and liquids. Chemical Geology. 346: 125-134. doi: 10.1016/j.chemgeo.2012.10.026

A.C. Withers (2013) On the use of unpolarized infrared spectroscopy for quantitative analysis of absorbing species in birefringent crystals. American Mineralogist. 98: 689-697. doi: 10.2138/am.2013.4316

R. Dasgupta, A. Mallik, K. Tsuno, A.C. Withers, G. Hirth and M.M. Hirschmann (2013) Carbon-dioxide-rich silicate melt in the Earth's upper mantle. Nature. 493: 211-215. doi: 10.1038/nature11731

M.M. Hirschmann, A.C. Withers, P. Ardia and N.T. Foley (2012) Solubility of molecular hydrogen in silicate melts and consequences for volatile evolution of terrestrial planets. Earth and Planetary Science Letters. 345-348: 38-48. doi: 10.1016/j.epsl.2012.06.031

A.C. Withers, H. Bureau, C. Raepsaet and M.M. Hirschmann (2012) Calibration of infrared spectroscopy by elastic recoil detection analysis of H in synthetic olivine. Chemical Geology. 334: 92-98. doi: 10.1016/j.chemgeo.2012.10.002

P. Ardia, M.M. Hirschmann, T.J. Tenner, A.C. Withers and R.L. Hervig (2012) H2O storage capacity of olivine at 5-8 GPa and consequences for dehydration partial melting of the upper mantle. Earth and Planetary Science Letters. 345-348: 104-116. doi: 10.1016/j.epsl.2012.05.038

W. Yong, S. Botis, S.R. Shieh, W.Shi and A.C. Withers (2012) Pressure-induced phase transition study of magnesiochromite (MgCr2O4) by Raman spectroscopy and X-ray diffraction. Physics of the Earth and Planetary Interiors. 196-197: 75-82 doi: 10.1016/j.pepi.2012.02.011

C.B. Till, T.L. Grove and A.C. Withers (2012) The beginnings of hydrous mantle wedge melting. Contributions to Mineralogy and Petrology. 163: 669-688. doi: 10.1007/s00410-011-0692-6

W. Yong, E. Dachs, A. Benisek, A.C. Withers and R.A. Secco (2012) Heat capacity, entropy and phase equilibria of dmitryivanovite. Physics and Chemistry of Minerals. 39: 259-267. doi: 10.1007/s00269-012-0481-4

T.J. Tenner, M.M. Hirschmann, A.C. Withers and P. Ardia (2012) H2O storage capacity of olivine and low-Ca pyroxene from 10 to 13 GPa: Consequences for dehydration melting above the transition zone. Contributions to Mineralogy and Petrology. 163: 297-316. doi: 10.1007/s00410-011-0675-7

B.D. Stanley, M.M. Hirschmann and A.C. Withers (2011) CO2 solubility in martian basalts and martian atmospheric evolution. Geochimica et Cosmochimica Acta. 75: 5987-6003. doi: 10.1016/j.gca.2011.07.027

K. Umemoto, R.M. Wentzcovitch, M.M. Hirschmann, D.L. Kohlstedt and A.C. Withers (2011) A first-principles investigation of hydrous defects and IR frequencies in forsterite: The case for Si vacancies. American Mineralogist. 96: 1471-1479. doi: 10.2138/am.2011.3720

A.C. Withers, M.M. Hirschmann and T.J. Tenner (2011) The effect of Fe on olivine H2O storage capacity: Consequences for H2O in the martian mantle. American Mineralogist. 96: 1039-1053. doi: 10.2138/am.2011.3669

M.M. Hirschmann, T. Tenner, C. Aubaud and A.C. Withers (2009). Dehydration melting of nominally anhydrous mantle: The primacy of partitioning. Physics of the Earth and Planetary Interiors. 176: 54-68. doi: 10.1016/j.pepi.2009.04.001

T.J. Tenner, M.M. Hirschmann, A.C. Withers and R.L. Hervig (2009). Hydrogen partitioning between nominally anhydrous upper mantle minerals and melt between 3 and 5 GPa and applications to hydrous peridotite partial melting. Chemical Geology. 262: 42-56. doi: 10.1016/j.chemgeo.2008.12.006

E. Dachs, C.A. Geiger, A.C. Withers and E.J. Essene (2009). A calorimetric investigation of spessartine: vibrational and magnetic heat capacity. Geochimica et Cosmochimica Acta. 73: 3393-3409. doi: 10.1016/j.gca.2009.03.011

R. Dasgupta, M.M. Hirschmann, W.F. McDonough, M. Spiegelman and A.C. Withers (2009). Trace element partitioning between garnet lherzolite and carbonatitic melt in Earth's deep upper mantle and its influence on the geochemistry of the mantle and mantle-derived melts. Chemical Geology. 262: 57-77. doi: 10.1016/j.chemgeo.2009.02.004

C. Aubaud, H. Bureau, C. Raepsaet, H. Khodja, A.C. Withers, M.M. Hirschmann and D.R. Bell (2009). Calibration of the infrared molar absorption coefficients for H in olivine, clinopyroxene and rhyolitic glass by elastic recoil detection analysis. Chemical Geology. 262: 78-86. doi: 10.1016/j.chemgeo.2009.01.001

M.M. Hirschmann and A.C. Withers (2008). Ventilation of CO2 from a reduced mantle and consequences for the early Martian greenhouse. Earth and Planetary Science Letters. 270: 147-155. doi: 10.1016/j.epsl.2008.03.034

A.C. Withers and M.M. Hirschmann (2008). Influence of temperature, composition, silica activity and oxygen fugacity on the H2O storage capacity of olivine at 8 GPa. Contributions to Mineralogy and Petrology. 156: 595-605. doi: 10.1007/s00410-008-0303-3

C. Aubaud, M.M. Hirschmann, A.C. Withers and R.L. Hervig (2008). Hydrogen partitioning between melt, clinopyroxene and garnet at 3 GPa in a hydrous MORB with 6 wt.% H2O. Contributions to Mineralogy and Petrology. 156: 607-625. doi: 10.1007/s00410-008-0304-2

W. Yong, E. Dachs, A.C. Withers and E.J. Essene (2008). Heat capacity and phase equilibria of wadeite-type K2Si4O9. Contributions to Mineralogy and Petrology. 155: 137-1465. doi: 10.1007/s00410-007-0232-6

A.C. Withers and M.M. Hirschmann (2007). H2O storage capacity of MgSiO3 clinoenstatite at 8-13 GPa, 1100-1400 °C. Contributions to Mineralogy and Petrology. 154: 663-674. doi: 10.1007/s00410-007-0215-7

J.R. Allwardt, J.F. Stebbins, H. Terasaki, L-S. Du, D.J. Frost, A.C. Withers, M.M. Hirschmann, A. Suzuki and E. Ohtani. (2007). Effect of structural transitions on properties of high-pressure silicate melts: 27Al NMR, glass densities, and melt viscosities. American Mineralogist. 92: 1093-1105. doi: 10.2138/am.2007.2530

W. Yong, E. Dachs, A.C. Withers and E.J. Essene (2007). Heat capacity of γ-Fe2SiO4 between 5 and 303 K and derived thermodynamic properties. Physics and Chemistry of Minerals. 34: 121-127. doi: 10.1007/s00269-006-0133-7

C. Aubaud, A.C. Withers, M.M. Hirschmann, Y. Guan, L.A. Leshin, S.J. Mackwell and D.R. Bell (2007). Intercalibration of FTIR and SIMS for hydrogen measurements in glasses and nominally anhydrous minerals. American Mineralogist. 92: 811-828. doi: 10.2138/am.2007.2248

M.M. Hirschmann, A.C. Withers and C. Aubaud (2006). Petrologic Structure of a Hydrous 410 km Discontinuity. In Earth's Deep Water Cycle (ed. S. Jacobson and S. van der Lee) Geophysical Monograph Series, vol. 168, pp. 277-287. American Geophysical Union. doi: 10.1029/168GM21

W. Yong, E. Dachs, A.C. Withers and E.J. Essene (2006). Heat capacity and phase equilibria of hollandite polymorph of KAlSi3O8. Physics and Chemistry of Minerals. 33: 167-177. doi: 10.1007/s00269-006-0063-4

J.R. Allwardt, J.F. Stebbins, B.C. Schmidt, D.J. Frost, A.C. Withers and M.M. Hirschmann (2005). Aluminum coordination and the densification of high-pressure aluminosilicate glasses. American Mineralogist. 90: 1218-1222. doi: 10.2138/am.2005.1836

M.M. Hirschmann, C. Aubaud and A.C. Withers (2005). Storage capacity of H2O in nominally anhydrous minerals in the upper mantle. Earth and Planetary Science Letters 236: 167-181. doi: 10.1016/j.epsl.2005.04.022

R. Dasgupta, M.M. Hirschmann and A.C. Withers (2004). Deep global cycling of carbon constrained by the solidus of anhydrous, carbonated eclogite under upper mantle conditions. Earth and Planetary Science Letters. 227: 73-85. doi: 10.1016/j.epsl.2004.08.004

A.C. Withers, E.J. Essene and Y. Zhang (2003). Rutile/TiO2II phase equilibria. Contributions to Mineralogy and Petrology. 145: 199-204. doi: 10.1007/s00410-003-0445-2

A.C. Withers, S.C. Kohn, R.A. Brooker and B.J. Wood (2000). A new method for determining the P-V-T properties of high density H2O using NMR: Results at 1.4-4.0 GPa and 700-1100°C. Geochimica et Cosmochimica Acta. 64: 1051-1057*. doi: 10.1016/S0016-7037(99)00318-X

* see also Science Magazine Editors' Choice, Volume 288, Number 5464, Issue of 14 April 2000.

A.C. Withers, H. Behrens and Y. Zhang (1999). Reconciliation of experimental results on H2O speciation in rhyolitic glass using in-situ and quenching techniques. Earth and Planetary Science Letters. 173: 343-349. doi: 10.1016/S0012-821X(99)00228-9

A.C. Withers and H. Behrens (1999). Temperature induced changes in the NIR spectra of hydrous albitic and rhyolitic glasses between 300 and 100 K. Physics and Chemistry of Minerals. 27: 119-132. doi: 10.1007/s002690050248

A.C. Withers, M.R. Carroll and B.J. Wood (1998). The OH content of pyrope at high pressure. Chemical Geology. 147: 161-171. doi: 10.1016/S0009-2541(97)00179-4

 

 

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The contents of this page have been neither reviewed nor approved by the University of Minnesota.