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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...
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Full Text:: FUCA RIDGE1 Martin R. Fisk,2 Ingunn H. Thorseth,3 Ena Urbach,4 and Stephen J. Giovannoni4 ABSTRACT

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...
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Full Text:: BASALTIC GLASS/SEA WATER INTERFACES1 Stephen J. Giovannoni,2 Martin R. Fisk,3 Thomas D. Mullins,2 and

Creator:: Fisk, Martin R., McNeill, Andrew W., Teagle, Damon A. H., Furnes, Harald, and Bach, Wolfgang
Abstract:: Ocean Drilling Program Hole 896A (1°13.01'N, 83°43.39'W) is in 3440 m of water east of the Galapagos Platform in the equatorial eastern Pacific Ocean. At this site in 5.9 Ma crust, basement rocks were recovered over the depth range of 195.1 meters below seafloor (mbsf) to 469 mbsf. These rocks...
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Full Text:: Martin R. Fisk,2 Andrew W. McNeill,3 Damon A.H. Teagle,4 Harald Furnes,5 and Wolfgang Bach6 INTRODUCTION

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...
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Full Text:: ABSTRACT Within the altered parts of the glass rim of pillow lavas of Hole 896A, at depths at least 432 m

Creator:: Fisk, Martin R.
Abstract:: The interaction of basalt melt with mantle harzburgite at low pressure might result in silica enrichment of the melt by assimilation of orthopyroxene. Experimental tests of this hypothesis show that silica-rich liquids (56 wt %) are produced by melt-orthopyroxene reaction at 1200° to 1250°C. These silica-rich liquids are enriched in...
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Full Text:: of the run. Fisk: Basalt Magma Interaction with Harzburgite 469 6ør [] m 52 o •x 0 •/ x x

Creator:: Abbott, Dallas and Fisk, Martin R.
Abstract:: We propose alternative mechanisms for the origin of three unusual rock suites, high-Mg andesites, NaTi basalts, and arclike rocks, that have been dredged from the Woodlark basin, southwest Pacific Ocean. We show that the high-Mg andesites and NaTi basalts are associated with an unusually cool ridge environment. The cooling is...
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Full Text:: CONTROLLED ORIGIN OF THREE UNUSUAL ROCK SUITES IN THE WOODLARK BASIN Dallas Abbott and Martin Fisk

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....
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Full Text:: Avenue, #117, Pasadena, California 91101, USA (mike@kinohi.org) M. R. Fisk College of Oceanic and

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...
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Full Text:: crust. Citation: Nielsen, M. E., and M. R. Fisk (2010), Surface area measurements of marine basalts

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...
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Full Text:: , Earth Planet. Sci. Lett., 61, 171-189, 1982. Fisk, M. R., S. J. Giovannoni, and T. D. Mullins

Creator:: Duncan, Robert A., Fisk, Martin R., White, William M., and Nielsen, Roger L.
Abstract:: The island of Tahiti, the largest in French Polynesia, comprises two major volcanoes aligned NW-SE, parallel with the general trend of the Society Islands hotspot track. Rocks form this volcanic system are basalts transitional to tholeiites, alkali basalts, basanites, picrites, and evolved lavas. Through K-Ar radiometric dating we have established...
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Full Text:: : Geochemical evolution of a French Polynesian volcano Robert A. Duncan and Martin R. Fisk College of

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