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Creator:: Fisk, Martin R., Thorseth, Ingunn H., Urbach, Ena, and Giovannoni, Stephen J.
Abstract:: During Leg 168 of the Ocean Drilling Program, basalts were recovered by drilling and subsurface water was collected with a water sampling tool at Hole 1026B on the east flank of Juan de Fuca Ridge. Microorganisms were found in both types of samples. The microorganisms in the basalt appear to...
Resource Type:: Article
Full Text:: FUCA RIDGE1 Martin R. Fisk,2 Ingunn H. Thorseth,3 Ena Urbach,4 and Stephen J. Giovannoni4 ABSTRACT

Creator:: Furnes, Harald, Thorseth, Ingunn H., Tumyr, Ole, Torsvik, Terje, and Fisk, Martin R.
Abstract:: Within the altered parts of the glass rim of pillow lavas of Hole 896A, at depths at least 432 m below seafloor (237 m below the top of volcanic basement), microbes have been identified. This is indicated by the size and shapes of alteration textures and verified by the presence...
Resource Type:: Article
Full Text:: FROM HOLE 896A1 Harald Furnes,2 Ingunn H. Thorseth,2 Ole Tumyr,2 Terje Torsvik,3 and Martin R. Fisk4

Creator:: Fisk, Martin R., Crovisier, Jean-Louis, and Honnorez, Jose
Abstract:: Microchannels in ocean basalt glass are often attributed to the activity of microorganisms, however, neither the mechanism of formation of microchannels in glass nor the involvement of microorganisms have been confirmed by experimentation. Experimental abiotic corrosion of basalt glass with 1% hydrofluoric acid (HF), a proxy for more slowly acting...
Resource Type:: Article
Full Text:: Furnes, H, Muehlenbachs, K, Torsvik, T, Thorseth, IH, Tumyr, O, (2001b) Microbial 432 fractionation of

Creator:: Fisk, Martin R. and Giovannoni, Stephen J.
Abstract:: Hydrothermal vents appear to be the tip of the subsurface biosphere in the ocean crust. The primary prducers in this biosphere are prokaryotes that tolerate a wide variety of physical and chemical conditions and are versatile in their use of inorganic compounds to drive metabolism. A synthesis of chemical and...
Resource Type:: Article
Full Text:: , 1994. Fisk, M. R., S. J. Giovannoni, E. Urbach, and I. H. Thorseth, Microbial weathering of the

Creator:: Nielsen, Mark E. and Fisk, Martin R.
Abstract:: These first measurements of specific surface area (SSA) of bulk samples of subsurface marine basalts were undertaken to determine the potential area available for microbial colonization. SSA ranged from 0.3 to 52 m2/g of basalt with the lowest value coming from pillow basalt and the highest value from breccia. The...
Resource Type:: Article
Full Text:: . Einen, J., I. H. Thorseth, and L. Ovreas (2008), Enumeration of Archaea and Bacteria in seafloor basalt

Creator:: Fisk, Martin R., Storrie-Lombardi, M. C., Douglas, S., Popa, R., McDonald, G., and Di Meo-Savoie, C.
Abstract:: The Hawaii Scientific Drilling Program (HSDP) cored and recovered igneous rock from the surface to a depth of 3109 m near Hilo, Hawaii. Much of the deeper parts of the hole is composed of hyaloclastite (fractured basalt glass that has been cemented in situ with secondary minerals). Some hyaloclastite units...
Resource Type:: Article
Full Text:: outcrop of hyaloclastite from an Icelandic subglacial eruption [Thorseth et al., 1992]. Further evidence

Creator:: Storrie-Lombardi, M. C. and Fisk, Martin R.
Abstract:: The alteration of subseafloor volcanic glass from three locations is qualitatively attributed to biological (biotic) or chemical (abiotic) reactions on the basis of microscopic morphology of the boundary between the unaltered and altered glass. Eleven-element composition of fresh basalt glass (sideromelane) and its alteration products were determined by electron microprobe....
Resource Type:: Article
Full Text:: Icelandic subglacial eruption [Thorseth et al., 1992]. Further evidence of microorganism ac- tivity in

Creator:: Giovannoni, Stephen J., Fisk, Martin R., Mullins, Thomas D., and Furnes, Harald
Abstract:: The majority of the Earth's shallow crust is composed of basalt that erupted on the seafloor and was subsequently altered by chemical exchange with seawater. One aspect of this alteration is the replacement of glass by secondary minerals, including clays. Petrographic thin sections from ODP Holes 504B and 896A revealed...
Resource Type:: Article
Full Text:: . Cosmo- chim. Acta, 47:337-350. Thorseth, I.H., Furnes, H., and Heldal, M., 1992. The importance of

Creator:: Smith, Amy, Popa, Radu, Fisk, Martin, Nielsen, Mark, Wheat, C. Geoffrey, Jannasch, Hans W., Fisher, Andrew T., Becker, Keir, Sievert, Stefan M., and Flores, Gilberto
Abstract:: The Integrated Ocean Drilling Program (IODP) Hole 1301A on the eastern flank of Juan de Fuca Ridge was used in the first long-term deployment of microbial enrichment flow cells using osmotically driven pumps in a subseafloor borehole. Three novel osmotically driven colonization systems with unidirectional flow were deployed in the...
Resource Type:: Article
Full Text:: 2011; Published 21 June 2011. Smith, A., R. Popa, M. Fisk, M. Nielsen, C. G. Wheat, H. W. Jannasch, A

Creator:: Heberling, Cara, Lowell, Robert P., Liu, lei, and Fisk, Martin R.
Abstract:: We estimate the depth of the 120°C isotherm by constructing crustal thermal gradients based on theoretical and observed conductive heat flux as a function of lithospheric age. We chose the 120°C isotherm because it is close to the upper limit for prokaryotic life, and therefore, the isotherm approximates the maximum...
Resource Type:: Article
Full Text:: –621, doi:10.1038/nature01352. Fisk, M. R., S. J. Giovannoni, and I. H. Thorseth (1998), Alter- ation

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