Abstract
To investigate the effect of water on phase relations and compositions in a basaltic system, we performed crystallization experiments at pressures of 100, 200 and 500 MPa in a temperature range of 940 to 1,220°C using four different water contents. Depending on the water activity, the oxygen fugacity varied between 1 and 4 log units above the quartz-magnetite-fayalite buffer. Addition of water to the dry system shifts the solidus > 250°C to lower temperatures and increases the amount of melt drastically. For instance, at 1,100°C and 200 MPa, the melt fraction increases from 12.5 wt% at a water content of 1.6 wt% to 96.3% at a water content of 5 wt% in the melt. The compositions of the experimental phases also show a strong effect of water. Plagioclase is shifted to higher anorthite contents by the addition of water. Olivine and clinopyroxene show generally higher MgO/FeO ratios with added water, which could also be related to the increasing oxygen fugacity with water. Moreover, water affects the partitioning of certain elements between minerals and melts, e.g., the Ca partitioning between olivine and melt. Plagioclase shows a characteristic change in the order of crystallization with water that may help to explain the formation of wehrlites intruding the lower oceanic crust (e.g., in Oman, Macquarie Island). At 100 MPa, plagioclase crystallizes before clinopyroxene at all water contents. At pressures > 100 MPa, plagioclase crystallizes before clinopyroxene at low water contents (e.g. < 3 wt%), but after clinopyroxene at H2O in the melt > 3 wt%. This change in crystallization order indicates that a paragenesis typical for wehrlites (olivine–clinopyroxene–without plagioclase) is stabilized at low pressures typical of the oceanic crust only at high water contents. This opens the possibility that typical wehrlites in the oceanic crust can be formed by the fractionation and accumulation of olivine and clinopyroxene at 1,060°C and > 100 MPa in a primitive tholeiitic basaltic system containing more than 3 wt% water. The comparison of the experimental results with evolution trends calculated by the thermodynamic models “MELTS” and “Comagmat” shows that neither model predicts the experimental phase relations with sufficient accuracy.
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References
Adachi Y, Miyashita S (2001) Magmatic processes of layered gabbro in the northern Oman ophiolite inferred from the zoning of plagioclase. International conference geology of Oman Abstract, vol 6
Albarède F, Provost A (1977) Petrological and geochemical mass-balance equations: an algorithm for least-square fitting and general error analysis. Comput Geosci 3:309–326
Ariskin AA (1999) Phase equilibria modeling in igneous petrology: use of COMAGMAT model for simulating fractionation of ferro-basaltic magmas and the genesis of high-alumina basalt. J Volcanol Geotherm Res 90:115–162
Asimow PD, Langmuir CH (2003) The importance of water to oceanic mantle melting regimes. Nature 421:815–820
Auwera JV, Longhi J (1994) Experimental study of a jotunite (hypersthene monzodiorite): constraints on the parent magma composition and crystallization conditions (P, T, fO2) of the Bjerkreim–Sokndal layered intrusion (Norway). Contrib Mineral Petrol 118:60–78
Baker MB, Grove TL, Price R (1994) Primitive basalts and andesites from the Mt. Shasta region, N California: products of varying melt fraction and water content. Contrib Mineral Petrol 118:111–129
Behrens H, Schulze F (2000) Compositional dependence of water diffusivity in aluminosilicate glasses and melts. In: D. Rammlmair JM, Oberthür Th, Heimann RB, Pentinghaus H (eds) Applied mineralogy in research, economy, technology and culture, Proceedings of the 6th international conference on applied mineralogy, Balkema, Rotterdam, pp 95–98
Bell DR, Rossman GR (1992) Water in earth’s mantle: the role of nominally anhydrous minerals. Science 255:1391–1397
Benn K, Nicolas A, Reuber I (1988) Mantle crust transition zone and origin of wehrlitic magmas: evidence from the Oman ophiolite. Tectonophysics 151:75–85
Benoit M, Ceuleneer G, Polve M (1999) The remelting of hydrothermally altered peridotite at mid-ocean ridges by intruding mantle diapirs. Nature 402:514–518
Berndt J, Liebske C, Holtz F, Freise M, Nowak M, Ziegenbein D, Hurkuck W, Koepke J (2002) A combined rapid-quench and H2-membrane setup for internally heated pressure vessels: Description and application for water solubility in basaltic melts. Am Mineral 87:1717–1726
Berndt J, Koepke J, Holtz F (2005) An experimental investigation of the influence of water and oxygen fugacity on differentiation of MORB at 200 MPa. J Petrol 46:135–167
Bezos A, Humler E (2005) The Fe3+/σ Fe ratios of MORB glasses and their implications for mantle melting. Geochim Cosmochim Acta 69:711–725
Blatter DL, Carmichael ISE (1998) Plagioclase-free andesites from Ziticuaro (Michoacan), Mexico: petrology and experimental constraints. Contrib Mineral Petrol 132:121–138
Blundy JD, Holland TJB (1990) Calcic amphibole equilibria and a new amphibole-plagioclase geothermomemeter. Contrib Mineral Petrol 104:208–224
Bosch D, Jamais M, Boudier F, Nicolas A, Dautria JM, Agrinier P (2004) Deep and high-temperature hydrothermal circulation in the Oman ophiolite: petrological and isotopic evidence. J Petrol 45:1181–1208
Boudier F, Godard M, Armbruster C (2000) Significance of gabbronorite occurrence in the crustal section of the Semail ophiolite. Mar Geophys Res 21:307–326
Boudier FO, Nicolas A, Mainprice D (2005) Does anisotropy of thermal contraction control hydrothermal circulation at the moho level below fast spreading oceanic ridges? Int Geol Rev 47:101–112
Burnham WC (1979) The importance of volatile constituents. In: Yoder HS (ed) The evolution of the igneous rocks: fiftieth anniversary perspectives. Princeton University Press, Princeton, pp 439–482
Chou IM (1987) Oxygen buffer and hydrogen sensor techniques at elevated pressures and temperatures. In: Ulmer GC, Barnes HL (eds) Hydrothermal experimental techniques. Wiley, New York, pp 61–99
Christie DM, Carmichael ISE, Langmuir CH (1986) Oxidation states of mid-ocean ridge basalt glasses. Earth Planet Sci Lett 79:397–411
Coogan LA, Wilson RN, Gillis KM, MacLeod CJ (2001) Near-solidus evolution of oceanic gabbros: Insights from amphibole geochemistry. Geochim Cosmochim Acta 65:4339–4357
Danyushevsky LV (2001) The effect of small amounts of H2O crystallisation of mid-ocean ridge and backarc basin magmas. J Volcanol Geotherm Res 110:265–280
Danyushevsky LV, Eggins SM, Falloon TJ, Christie DM (2000) H2O abundance in depleted to moderately enriched mid-ocean ridge magmas; Part I: Incompatible behaviour, implications for mantle storage, and origin of regional variations. J Petrol 41:1329–1364
Devine JD, Gardner JE, Brack HP, Layne GD, Rutherford MJ (1995) Comparison of microanalytical methods for estimating H2O contents of silicic volcanic glasses. Am Mineral 80:319–328
Dick HJB, Natland JH, Alt JC, Bach W, Bideau D, Gee JS, Haggas S, Hertogen JGH, Hirth G, Holm PM, Ildefonse B, Iturrino GJ, John BE, Kelley DS, Kikawa E, Kingdon A, LeRoux PJ, Maeda J, Meyer PS, Miller DJ, Naslund HR, Niu Y, Robinson PT, Snow J, Stephen RA, Trimby PW, Worm H-U, Yoshinobu A (2000) A long in situ section of the lower ocean crust: results of ODP Leg 176 drilling at the Southwest Indian Ridge. Earth Planet Sci Lett 179:31–51
Dunn T, Sen C (1994) Mineral/matrix partition-coefficients for orthopyroxene, plagioclase, and olivine in basaltic to andesitic systems: a combined analytical and experimental study. Geochim Cosmochim Acta 58:717–733
Eggler DH, Burnham CW (1973) Crystallization and fractionation trends in system andesite-H2O − CO2 − O2 at pressures to 10 Kb. Geol Soc Am Bull 84:2517–2532
Ernst WG, Liu J (1998) Experimental phase-equilibrium study of Al- and Ti-contents of calcic amphibole in MORB: a semiquantitative thermobarometer. Am Mineral 83:952–969
Gaetani GA, Grove TL, Bryan WB (1993) The influence of water on the petrogenesis of subduction-related igneous rocks. Nature 365:332–334
Gaetani GA, Grove TL, Bryan WB (1994) Experimental phase relations of basaltic andesite from Hole 839B under hydrous and anhydrous conditions. In: Hawkins J, Parson L, Allan J, et al. (eds) Proceedings of the Ocean Drilling Program, scientific results, vol 135. Ocean Drilling Program, College Station, TX, pp 557–563
Ghiorso MS, Sack RO (1995) Chemical mass transfer in magmatic processes IV. A revised and internally consistent thermodynamic model for the interpolation and extrapolation of liquid–solid equilibria in magmatic systems at elevated temperatures and pressures. Contrib Mineral Petrol 119:197–212
Grove TL, Baker MB (1984) Phase-equilibrium controls on the tholeiitic versus calc-alkaline differentiation trends. J Geophys Res 89:3253–3274
Grove TL, Bryan WB (1983) Fractionation of pyroxene-phyric MORB at low pressure: an experimental study. Contrib Mineral Petrol 84:293–309
Grove TL, Juster TC (1989) Experimental investigations of low-Ca pyroxene stability and olivine pyroxene liquid equilibria at 1-atm in natural basaltic and andesitic liquids. Contrib Mineral Petrol 103:287–305
Grove TL, Kinzler RJ, Bryan WB (1990) Natural and experimental phase relations of lavas from Serocki Volcano. In: Bryan WB, Juteau T et al. (eds) Proceeding of the Ocean Drilling Program, vol 106/109 Part B. Ocean Drilling Program, College Station, TX, pp 9–17
Grove TL, Donnelly-Nolan JM, Housh T (1997) Magmatic processes that generated the rhyolite of Glass Mountain, Medicine Lake volcano, N California. Contrib Mineral Petrol 127:205–223
Hamilton DL, Burnham CW, Osborn EF (1964) The solubility of water and effects of oxygen fugacity and water content on crystallization in mafic magmas. J Petrol 5:21–39
Helz RT (1973) Phase relations of basalt in their melting ranges at P H 2O = 5 kb as a function of oxygen fugacity. J Petrol 14:249–302
Helz RT (1976) Phase relations of basalt in their melting ranges at PH2O = 5 kb. Part II: melt compositions. J Petrol 17:139–193
Hirschmann MM, Baker MB, Stolper E (1998) The effect of alkalis on the silica content of mantle-derived melts. Geochim Cosmochim Acta 62:883–902
Hirschmann MM, Aubaud C, Withers AC (2005) Storage capacity of H2O in nominally anhydrous minerals in the upper mantle. Earth Planet Sci Lett 236:167–181
Holloway JR, Burnham CW (1972) Melting relations of basalt with equilibrium water pressure less than total pressure. J Petrol 13:1–29
Holloway JR, Dixon JE, Pawley AR (1992) An internally heated, rapid-quench, high-pressure vessel. Am Mineral 77:643–646
Holtz F, Behrens H, Dingwell DB, Johannes W (1995) H2O solubility in haplogranitic melts - compositional, pressure, and temperature dependence. Am Mineral 80:94–108
Holtz F, Becker A, Freise M, Johannes W (2001) The water-undersaturated and dry Qz-Ab-Or system revisited. Experimental results at very low water activities and geological implications. Contrib Mineral Petrol 141:347–357
Housh TB, Luhr JF (1991) Plagioclase-melt equilibria in hydrous systems. Am Mineral 76:477–492
Huebner JS, Sato M (1970) Oxygen fugacity-temperature relationships of manganese oxide and nickel oxide buffers. Am Mineral 55:934–952
Ishikawa T, Nagaishi K, Umino S (2002) Boninitic volcanism in the Oman ophiolite: Implications for thermal condition during transition from spreading ridge to arc. Geology 30:899–902
Jurewicz AJG, Watson EB (1988) Cations in olivine: 1. Calcium partitioning and calcium-magnesium distribution between olivines and coexisting melts, with Petrologic Applications. Contrib Mineral Petrol 99:176–185
Juster TC, Grove TL, Perfit MR (1989) Experimental constraints on the generation of Fe–Ti basalts, andesites, and rhyodacites at the Galapagos spreading centre, 85°W and 95°W. J Geophys Res 94:9251–9274
Juteau T, Ernewein M, Reuber I, Whitechurch H, Dahl R (1988) Duality of magmatism in the plutonic sequence of the Sumail Nappe, Oman. Tectonophysics 151:107–135
Kagi R, Müntener O, Ulmer P, Ottolini L (2005) Piston-cylinder experiments on H2O undersaturated Fe-bearing systems: an experimental setup approaching fO2 conditions of natural calc-alkaline magmas. Am Mineral 90:708–717
Kawamoto T (1996) Experimental constraints on differentiation and H2O abundance of calc-alkaline magmas. Earth Planet Sci Lett 144:577–589
Kawamoto T, Hirose K (1994) Au-Pd sample containers for melting experiments on iron and water-bearing systems. Eur J Mineral 6:381–385
Kelemen PB, Koga K, Shimizu N (1997) Geochemistry of gabbro sills in the crust-mantle transition zone of the Oman ophiolite: implications for the origin of the oceanic lower crust. Earth Planet Sci Lett 146:475–488
Koepke J, Feig ST, Snow J, Freise M (2004) Petrogenesis of oceanic plagiogranites by partial melting of gabbros: an experimental study. Contrib Mineral Petrol 146:414–432
Koepke J, Feig ST, Boudier F, Hellebrand E (2005a) Experimental study on crustal wehrlites of the Oman ophiolite: experimental outline and microanalytical results. Ofioliti 30:197–198
Koepke J, Feig ST, Snow J (2005b) Hydrous partial melting within the lower oceanic crust. Terra Nova 17:286–291
Koepke J, Feig ST, Snow JE (2005c) Late stage magmatic evolution of oceanic gabbros as a result of hydrous partial melting: evidence from the Ocean Drilling Program (ODP) Leg 153 drilling at the Mid-Atlantic Ridge. Geochem Geophys Geosyst 6:2004 GC000805
Koga KT, Kelemen PB, Shimizu N (2001) Petrogenesis of the crust-mantle transition zone and the origin of lower crustal wehrlite in the Oman ophiolite. Geochem Geophys Geosyst 2:2000 GC000132
Kovalenko VI, Naumov VB, Yarmolyuk VV, Dorofeeva VA (2000) Volatile components (H2O, CO2, Cl, F, and S) in basic magmas of various geodynamic settings: Data on melt inclusions and quenched glasses. Petrology 8:113–144
Kress VC, Carmichael ISE (1991) The compressibility of silicate liquids containing Fe2O3 and the effect of composition, temperature, oxygen fugacity and pressure on their redox states. Contrib Mineral Petrol 108:82–92
Lachize M, Lorand JP, Juteau T (1996) Calc-alkaline differentiation trend in the plutonic sequence of the Wadi Haymiliyah section, Haylayn massif, Semail ophiolite, Oman. Lithos 38:207–232
Leake BE, Woolley AR, Arps CES, Birch WD, Gilbert MC, Grice JD, Hawthorne FC, Kato A, Kisch HJ, Krivovichev VG, Linthout K, Laird J, Mandarino JA, Maresch WV, Nickel EH, Rock NMS, Schumacher JC, Smith DC, Stephenson NCN, Ungaretti L, Whittaker EJW, Guo YZ (1997) Nomenclature of amphiboles: report of the subcommittee on amphiboles of the International Mineralogical Association, commission on new minerals and mineral names. Am Mineral 82:1019–1037
Leschik M, Heide G, Frischat GH, Behrens H, Wiedenbeck M, Wagner N, Heide K, Geissler H, Reinholz U (2004) Determination of H2O and D2O contents in rhyolitic glasses. Phys Chem Glass 45:238–251
Libourel G (1999) Systematics of calcium partitioning between olivine and silicate melt: implications for melt structure and calcium content of magmatic olivines. Contrib Mineral Petrol 136:63–80
Lindsley DH (1983) Pyroxene Thermometry. Am Mineral 68:477–493
Longhi J, Walker D, Hays JF (1978) Distribution of Fe and Mg between olivine and lunar basaltic liquids. Geochim Cosmochim Acta 42:1545–1558
Luhr JF (1990) Experimental phase-relations of water-saturated and sulfur-saturated arc magmas and the 1982 eruptions of El-Chichon volcano. J Petrol 31:1071–1114
Mandeville CW, Webster JD, Rutherford MJ, Taylor BE, Timbal A, Faure K (2002) Determination of molar absorptivities for infrared absorption bands of H2O in andesitic glasses. Am Mineral 87:813–821
Martel C, Pichavant M, Bourdier JL, Traineau H, Holtz F, Scaillet B (1998) Magma storage conditions and control of eruption regime in silicic volcanoes: experimental evidence from Mt. Pelee. Earth Planet Sci Lett 156:89–99
Miyashiro A (1974) Volcanic rock series in island arcs and active continental margins. Am J Sci 274:321–355
Natland JH, Dick HJB (2002) Stratigraphy and composition of gabbros drilled in Ocean Drilling Program Hole 735B, Southwest Indian Ridge: a synthesis of geochemical data. In: Natland JH, Dick HJB, Miller DJ, Von Herzen RP (eds) Proceedings of the ODP, scientific results, vol 176, pp 1–69 (online). http://www.odp.tamu.edu/publications/176_SR/VOLUME/ SYNTH/SYNTH.PDF
Natland JH, Meyer PS, Dick HJB, Bloomer SH (1991) Magmatic oxides and sulfides in gabbroic rocks from Hole 735B and the later development of the liquid line of descent. In: Von Herzen RP, Robinson PT et al. (eds) Proceedings of the ODP, scientific results, vol 118, Ocean Drilling Program, College Station, TX, pp 75–111
Nicolas A (1989) Structures of ophiolites and dynamics of oceanic lithosphere. In: Kluver Academic, Dordrecht, p 367
Nicolas A, Mainprice D (2005) Burst of high-temperature seawater injection throughout accreting oceanic crust: a case study in Oman ophiolite. Terra Nova 17:326–330
Nicolas A, Mainprice D, Boudier F (2003) High-temperature seawater circulation throughout crust of oceanic ridges: a model derived from the Oman ophiolites. J Geophys Res Solid Earth 108:2371
Nonnotte P, Ceuleneer G, Benoit M (2005) Genesis of andesitic-boninitic magmas at mid-ocean ridges by melting of hydrated peridotites: geochemical evidence from DSDP Site 334 gabbronorites. Earth Planet Sci Lett 236:632–653
Ohlhorst S, Behrens H, Holtz F (2001) Compositional dependence of molar absorptivities of near-infrared OH- and H2O bands in rhyolitic to basaltic glasses. Chem Geol 174:5–20
Panjasawatwong Y, Danyushevsky LV, Crawford AJ, Harris KL (1995) An experimental study of the effects of melt composition on plagioclase–melt equilibria at 5 kbar and 10 kbar: implications for the origin of magmatic high-An plagioclase. Contrib Mineral Petrol 118:420–432
Pearce JA, Lippard SJ, Roberts S (1984) Characteristics and tectonic significance of supra-subduction zone ophiolites. In: Kokelaar BP, Howells MJ (eds) Marginal basin geology. Blackwell, London, pp 77–94
Pitzer KS, Sterner SM (1994) Equations of state valid continuously from zero to extreme pressures for H2O and CO2. J Chem Phys 101:3111–3116
Pouchou JL, Pichoir F (1991) Quantitative analysis of homogeneous or stratified microvolumes applying the model “PAP”. In: Heinrich KFJ, Newbury DE (eds) Electron probe quantification. Plenum Press, New York, pp 31–75
Putirka K, Johnson M, Kinzler R, Longhi J, Walker D (1996) Thermobarometry of mafic igneous rocks based on clinopyroxene–liquid equilibria, 0–30 kbar. Contrib Mineral Petrol 123:92–108
Putirka KD, Mikaelian H, Ryerson F, Shaw H (2003) New clinopyroxene–liquid thermobarometers for maric, evolved, and volatile-bearing lava compositions, with applications to lavas from Tibet and the Snake River Plain, Idaho. Am Mineral 88:1542–1554
Robie RA, Hemingway BS, Fisher JR (1978) Thermodynamic properties of minerals and related substances at 298,15 K and 1 Bar (105 Pascals) pressure and at higher temperatures. Geol Surv Bull 1452, 456 pp
Roeder PL (1974) Activity of iron and olivine solubility in basaltic liquids. Earth Planet Sci Lett 23:397–410
Roeder PL, Emslie RF (1970) Olivine–liquid equilibrium. Contrib Mineral Petrol 29:275–289
Rollinson H, Appel PWU, Frei R (2002) A metamorphosed, early Archaean chromitite from west Greenland: implications for the genesis of Archaean anorthositic chromitites. J Petrol 43:2143–2170
Roux J, Lefevre A (1992) A fast-quench device for internally heated pressure vessels. Eur J Mineral 4:279–281
Saal AE, Hauri EH, Langmuir CH, Perfit MR (2002) Vapour undersaturation in primitive mid-ocean-ridge basalt and the volatile content of Earth’s upper mantle. Nature 419:451–455
Sano T, Fujii T, Deshmukh SS, Fukuoka T, Aramaki S (2001) Differentiation processes of Deccan Trap basalts: contribution from geochemistry and experimental petrology. J Petrol 42:2175–2195
Scaillet B, Pichavant M, Roux J (1995) Experimental crystallization of leukogranite magmas. J Petrol 36:663–705
Scholze H (1959) Über die quantitative ir-spektroskopische Wasserbestimmung in Silicaten. Angew Chem Int Edit 71:678–678
Schwab RG, Küstner D (1981) The equilibrium fugacities of important oxygen buffers in technology and petrology. N Jb Miner Mh 140:112–142
Shaw HR, Wones DR (1964) Fugacity coefficients for hydrogen gas between 0°C and 1000°C, for pressures to 3000 atm. Am J Sci 262:918–929
Shipboard Scientific Party (2004) Drilling mantle peridotites along the mid-atlantic ridge from 14° to 16°N. In: Kelemen PB, Kikawa E, Miller DJ et al. (eds) Proceedings of the Ocean Drilling Program, initial reports, vol 209. Ocean Drilling Program, College Station, TX, pp 1–139
Sisson TW, Grove TL (1993b) Temperatures and H2O contents of low-MgO high-alumina basalts. Contrib Mineral Petrol 113:167–184
Sisson TW, Grove TL (1993a) Experimental investigations of the role of H2O in calc-alkaline differentiation and subduction zone magmatism. Contrib Mineral Petrol 113:143–166
Snow JE (2002) Major and trace element evolution of Hole 735B gabbros. In: Natland JH, Dick HJB, Miller DJ, Von Herzen RP (eds) Proceedings of the Ocean Drilling Program, scientific results, vol 176, pp 1–18 (online). http://www.odp.tamu.edu/ publications/176_SR/VOLUME/CHAPTERS/SR176_12.PDF
Snyder D, Carmichael ISE, Wiebe RA (1993) Experimental study of liquid evolution in an Fe-rich, layered mafic intrusion: constraints of Fe-Ti oxide precipitation on the T − fO2 and T-ρpaths of tholeiitic magmas. Contrib Mineral Petrol 113:73–86
Sobolev AV, Chaussidon M (1996) H2O concentration in primary melts from supra-subduction zones and mid-ocean ridges: Implication for H2O storage and recycling in the mantle. Earth Planet Sci Lett 137:45–55
Spulber SD, Rutherford MJ (1983) The origin of rhyolite and plagiogranite in oceanic crust: an experimental study. J Petrol 24:1–25
Stormer JC (1983) The effects of recalculation on estimates of temperature and oxygen fugacity from analyses of multicomponent iron titanium-oxides. Am Mineral 68:586–594
Thy P (1995) Low-pressure experimental constraints on the evolution of komatiites. J Petrol 36:1529–1548
Thy P, Lesher CE, Fram MS (1998) Low pressure experimental constraints on the evolution of basaltic lavas from Site 917, southeast Greenland continental margin. In: Saunders AD, Larsen HC, Wise SW Jr (eds) Proceedings of the ODP, scientific results, vol 152. Ocean Drilling Program, College Station, TX, pp 359–372
Thy P, Lesher CE, Mayfield JD (1999) Low-pressure melting studies of basalt and basaltic andesite from the southeast Greenland continental margin and the origin of dacites at site 917. In: Larsen HC, Duncan RA, Allan JF, Brooks K (eds) Proceedings of the ODP, scientific results, vol 163. Ocean Drilling Program, College Station, TX, pp 95–112
Toplis MJ (2005) The thermodynamics of iron and magnesium partitioning between olivine and liquid: criteria for assessing and predicting equilibrium in natural and experimental systems. Contrib Mineral Petrol 149:22–39
Toplis MJ, Carroll MR (1995) An experimental study of the influence of oxygen fugacity on Fe-Ti oxide stability, phase relations, and mineral-melt equilibra in ferro-basaltic systems. J Petrol 36:1137–1170
Tribuzio R, Tiepelo M, Thirlwall MF (2000) Origin of titanian pargasite in gabbroic rocks from the Northern Apennine ophiolites (Italy): Insight into the late-magmatic evolution of a MOR-type intrusive sequence. Earth Planet Sci Lett 176:281–293
Wagner TP, Donnellynolan JM, Grove TL (1995) Evidence of hydrous differentiation and crystal accumulation in the low-MgO, high-Al2O3 Lake basalt from Medicine Lake volcano, California. Contrib Mineral Petrol 121:201–216
Watson EB (1979) Calcium diffusion in a simple silicate melt to 30 Kbar. Geochim Cosmochim Acta 43:313–322
Wertz K, Hellebrand E, Snow JE, von der Handt A, Mosher S (2004) Implications of spoon-shaped rare earth pattern in Macquarie Island depleted residual peridotites. Geological Society of Australia Ann. Mtg 2004, Hobart, Tasmania
Acknowledgments
Otto Diedrich’s careful sample preparation is gratefully acknowledged. The authors thank F. Costa Rodriguez and B. Scaillet for careful and thorough reviews of the manuscript. Valuable editorial advice from J. Hoefs is acknowledged. This research used sample was provided by the Ocean Drilling Program (ODP). ODP is sponsored by the US National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. The funding for this research was provided by a grant from the Deutsche Forschungsgemeinschaft (KO 1723/4-2). Jonathan E. Snow was supported by a Heisenberg Fellowship from the Deutsche Forschungsgemeinschaft.
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Feig, S.T., Koepke, J. & Snow, J.E. Effect of water on tholeiitic basalt phase equilibria: an experimental study under oxidizing conditions. Contrib Mineral Petrol 152, 611–638 (2006). https://doi.org/10.1007/s00410-006-0123-2
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DOI: https://doi.org/10.1007/s00410-006-0123-2