Proc. IODP, 335, Data report: lithologic diversity, mineral composition, and temperature and redox conditions in ODP/IODP Hole 1256D—a study of sand and gravels recovered during IODP Expedition 335

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Chapter contents Abstract Introduction Methods and material Samples Methods Results Lithologic abundance Mineral composition Temperature and redox conditions Acknowledgments References Figures F1. Image processing to estimate abundance, Run20BSJB-T. F2. Relative abundance of each lithology. F3. Pyroxenes, gabbroic lithologies, and granoblastic basalt. F4. Cr₂O₃, TiO₂, Al₂O₃, and Na₂O vs. Mg# cpx. F5. Anorthite content. F6. MgO vs. anorthite content. F7. Fe-Ti oxides. F8. Amphiboles. F9. Glasses in glass grains. Tables T1. Thin section characteristics. T2. Thermometry and oxybarometry results. PDF file			Previous \| Next doi:10.2204/iodp.proc.335.203.2016 References Abzalov, M.Z., 1998. Chrome–spinels in gabbro–wehrlite intrusions of the Pechenga area, Kola Peninsula, Russia: emphasis on alteration features. Lithos, 43(3):109–134. http://dx.doi.org/10.1016/S0024-4937(98)00005-X Alt, J.C., Laverne, C., Coggon, R.M., Teagle, D.A.H., Banerjee, N.R., Morgan, S., Smith-Duque, C.E., Harris, M., and Galli, L., 2010. Subsurface structure of a submarine hydrothermal system in ocean crust formed at the East Pacific Rise, ODP/IODP Site 1256. Geochemistry, Geophysics, Geosystems, 11(10):Q10010. http://dx.doi.org/10.1029/2010GC003144 Andersen, D.J., Lindsley, D.H., and Davidson, P.M., 1993. QUILF: a Pascal program to assess equilibria among Fe–Mg–Mn–Ti oxides, pyroxenes, olivine, and quartz. Computers & Geosciences, 19(9):1333–1350. http://dx.doi.org/10.1016/0098-3004(93)90033-2 Bézos, A., and Humler, E., 2005. The Fe3+/ΣFe ratios of MORB glasses and their implications for mantle melting. Geochimica et Cosmochimica Acta, 69(3):711–725. http://dx.doi.org/10.1016/j.gca.2004.07.026 Brey, G.P., and Köhler, T., 1990. Geothermobarometry in four-phase lherzolites, II. 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In Teagle, D.A.H., Alt, J.C., Umino, S., Miyashita, S., Banerjee, N.R., Wilson, D.S., and the Expedition 309/312 Scientists, Proceedings of the Integrated Ocean Drilling Program, 309/312: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.). http://dx.doi.org/10.2204/iodp.proc.309312.201.2008 Expedition 335 Scientists, 2012a. Expedition 335 summary. In Teagle, D.A.H., Ildefonse, B., Blum, P., and the Expedition 335 Scientists, Proceedings of the Integrated Ocean Drilling Program, 335: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). http://dx.doi.org/10.2204/iodp.proc.335.101.2012 Expedition 335 Scientists, 2012b. Methods. In Teagle, D.A.H., Ildefonse, B., Blum, P., and the Expedition 335 Scientists, Proceedings of the Integrated Ocean Drilling Program, 335: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). http://dx.doi.org/10.2204/iodp.proc.335.102.2012 Expedition 335 Scientists, 2012c. Site 1256. In Teagle, D.A.H., Ildefonse, B., Blum, P., and the Expedition 335 Scientists, Proceedings of the Integrated Ocean Drilling Program, 335: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). http://dx.doi.org/10.2204/iodp.proc.335.103.2012 France, L., Ildefonse, B., and Koepke, J., 2009. Interactions between magma and hydrothermal system in Oman ophiolite and in IODP Hole 1256D: fossilization of a dynamic melt lens at fast spreading ridges. Geochemistry, Geophysics, Geosystems, 10(10):Q10O19. http://dx.doi.org/10.1029/2009GC002652 France, L., Ildefonse, B., Koepke, J., and Bech, F., 2010a. A new method to estimate the oxidation state of basaltic series from microprobe analyses. Journal of Volcanology and Geothermal Research, 189(3–4):340–346. http://dx.doi.org/10.1016/j.jvolgeores.2009.11.023 France, L., Koepke, J., Ildefonse, B., Cichy, S.B., and Deschamps, F., 2010b. Hydrous partial melting in the sheeted dike complex at fast spreading ridges: experimental and natural observations. Contributions to Mineralogy and Petrology, 160(5):683–704. http://dx.doi.org/10.1007/s00410-010-0502-6 Holland, T., and Blundy, J., 1994. Non-ideal interactions in calcic amphiboles and their bearing on amphibole–plagioclase thermometry. Contributions to Mineralogy and Petrology, 116(4):433–447. http://dx.doi.org/10.1007/BF00310910 Jugo, P.J., Luth, R.W., and Richards J.P., 2005. Experimental data on the speciation of sulfur as a function of oxygen fugacity in basaltic melts. Geochimica et Cosmochimica Acta, 69(2):497–503. http://dx.doi.org/10.1016/j.gca.2004.07.011 Koepke, J., Christie, D.M., Dziony, W., Holtz, F., Lattard, D., Maclennan, J., Park, S., Scheibner, B., Yamasaki, T., and Yamazaki, S., 2008. Petrography of the dike–gabbro transition at IODP Site 1256 (equatorial Pacific): the evolution of the granoblastic dikes. Geochemistry, Geophysics, Geosystems, 9(7):Q07O09. http://dx.doi.org/10.1029/2008GC001939 Koepke, J., France, L., Müller, T., Faure, F., Goetze, N., Dziony, W., and Ildefonse, B., 2011. Gabbros from IODP Site 1256, equatorial Pacific: insight into axial magma chamber processes at fast spreading ocean ridges. Geochemistry, Geophysics, Geosystems, 12(9):Q09014. http://dx.doi.org/10.1029/2011GC003655 Leake, B.E., Woolley, A.R., Arps, C.E.S, Birch, W.D., Gilbert, M.C., et al., 1997. Nomenclature of amphiboles: report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names. Canadian Mineralogist, 35:219–246. Perfit, M.R., and Fornari, D.J., 1983. Geochemical studies of abyssal lavas recovered by DSRV Alvin from eastern Galapagos Rift, Inca Transform, and Ecuador Rift, 2. Phase chemistry and crystallization history. Journal of Geophysical Research, 88(B12):10530–10550. http://dx.doi.org/10.1029/JB088iB12p10530 Sano, T., Sakuyama, T., Ingle, S., Rodriguez, S., and Yamasaki, T., 2011. Petrological relationships among lavas, dikes, and gabbros from Integrated Ocean Drilling Program Hole 1256D: insight into the magma plumbing system beneath the East Pacific Rise. Geochemistry, Geophysics, Geosystems, 12:Q06013. http://dx.doi.org/10.1029/2011GC003548 Sauerzapf, U., Lattard, D., Burchard, M., and Engelmann, R., 2008. The titanomagnetite–ilmenite equilibrium: new experimental data and thermo-oxybarometric application to the crystallization of basic to intermediate rocks. Journal of Petrology, 49(6):1161–1185. http://dx.doi.org/10.1093/petrology/egn021 Teagle, D.A.H., Alt, J.C., Umino, S., Miyashita, S., Banerjee, N.R., Wilson, D.S., and the Expedition 309/312 Scientists, 2006. Proceedings of the Integrated Ocean Drilling Program, 309/312: Washington, DC (Integrated Ocean Drilling Program Management International, Inc.). http://dx.doi.org/10.2204/iodp.proc.309312.2006 Umino, S., 2007. Data report: textural variation of Units 1256C-18 and 1256D-1 lava pond, with special reference to recrystallization of the base of Unit 1256C-18. In Teagle, D.A.H., Wilson, D.S., Acton, G.D., and Vanko, D.A. (Eds.), Proceedings of the Ocean Drilling Program, Scientific Results, 206: College Station, TX (Ocean Drilling Program), 1–32. http://dx.doi.org/10.2973/odp.proc.sr.206.007.2007 Wilson, D.S., 1996. Fastest known spreading on the Miocene Cocos–Pacific plate boundary. Geophysical Research Letters, 23(21):3003–3006. http://dx.doi.org/10.1029/96GL02893 Top of page \| Previous \| Next

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