Journal of Conference Abstracts

General Session: Oral Presentations

Comparison of Gravity, Bathymetry, Mantle Tomography and Geochemistry of Basalts along the Northern Mid-Atlantic Ridge

(J.F. Casey, H. Zhou, E. Pavlenko, C. Xia, V. Golod and W. B. Bryan)

Methane Degassing, Hydrothermal Activity and Serpentinization Between the Fifteen-Twenty Fracture Zone Area and the Azores Triple Junction Area, (Mid-Atlantic Ridge)

(J.L. Charlou , H. Bougault, Y. Fouquet, J.P. Donval, E. Douville, J.R. Knoery, M. Aballéa,
H.D. Needham, P. Jean-Baptiste, P.A. Rona, C.H. Langmuir and C.R. German)

Water and Carbon Dioxide in Mid-Atlantic Ridge Glasses (22°N - 41°N): Implications for the Role of Water in the Generation of Mid-Ocean Ridge Basalt

(J.E. Dixon , C.H. Langmuir and S. Horan)

Geochemical Structure of the Mid-Atlantic Ridge Between 10°and 41°N

(L. Dosso , O. Bonnier, C. Bollinger, H. Bougault, J. Etoubleau and C.H. Langmuir)

Transforms and Non-Transform Offsets of the Central and Northern Atlantic Ocean Basin: Propagation and Stability Inferred from Satellite Gravity Data

(J. Escartín and J. Lin)

Comparison of Sulfide Mineralisation Related To Slow Spreading Ridges with High Magmatic Budget (Lucky Strike and Menez Gwen Sites) and Low Magmatic Budget (15°N Area)

(Y.Fouquet , P. Murphy, M.K. Tivey, K. Henry, F.J.A.S. Barriga, I. Costa, P. Cambon, H. Bougault,
C.H. Langmuir, D. Prieur, P.A. Rona, S.G. Krasnov and I.M. Poroshina)

Evidence of Focused Mantle Upwelling along Slow-Spreading Ridges

(P. Gente, M. Maia and C. Durand)

Hydrothermal Activity along the Mid-Atlantic Ridge: Tectonic vs. Volcanic Controls?

(C.R. German )

Short To Long-Range Monitoring of the Composition and Magnitude of Ridge Flank Geochemical Fluxes

(M. Kastner)

Influence of Spreading Rate, Magma Flux and Tectonic Setting on Crystallization and Assimilation Beneath Mid-Ocean Ridges

(P.J. Michael and W. Cornell)

Some Features of the North America - Africa Plate Boundary

(H.D. Needham)

Seismicity and Seismic Structure at Slow-Spreading Ridges: Implications for Seismic Deformation and Crustal Magmatism at the Segment Scale

(D.R. Toomey, S.C. Solomon , G.M. Purdy, A.H. Barclay and C.J. Wolfe)

General Session: Poster Presentations

Hydrothermal and Surface Geology along the Mid-Atlantic Ridge: Acoustic Classification of TOBI
Side-Scan Imagery from 27°N - 30°N and 36°N - 38°N

(P. Blondel, L.M. Parson, B.J. Murton and C.R. German)

Major and Trace Element Geochemistry of Basalts, Gabbros and Peridotites along the Northern
Mid-Atlantic Ridge: An Assessment of the Range of Subaxial Parental and Evolved Melt Compositions

(J.F. Casey, S. Silantyev, L. Dmitriev, S E Smith and W. Bryan)

Hydrothermal Activity on the Mid-Atlantic Ridge from 15°N To 65°N: Helium Isotopes Distribution and Constraints on Hydrothermal Fluxes

(P. Jean-Baptiste, J.C. Dutay, A. Dapoigny, P. Allard, H. Bougault, J.L. Charlou, Y. Fouquet,
J.R. Knoery, A. Vangriesheim, H.D. Needham and P.A. Rona)

Identifying Pathways of Late-Stage Silicate Liquids Through Adcumulate Gabbroic Rocks

(J.K. Meen and D. Elton)

Extent of Active Faulting from Sediment Scarps

(N.C. Mitchell and R.C. Searle)

Hydrogeologic Models of Mid-Ocean Ridge Flanks

(L. Reiser Wetzel and E.L. Shock)

Morphological Characteristics of the Segmentation along the Mid-Atlantic Ridge (15°20'N - 40°N): Constraints for the Formation of the Axial Valley

(R. Thibaud, P. Gente and M. Maia)

Biological Session: Oral Presentations

Sensory Neurobiology of Hydrothermal Vent Shrimp from the Mid-Atlantic Ridge

(S.C. Chamberlain , B.-A. Battelle, E.D. Herzog, R.N. Jinks, L.Kass and G.H. Renninger)

Mussel Population Structure and Recruitment on Two Hydrothermal Areas on the Mid-Atlantic Ridge: Lucky Strike (37°17'N, 1700 M) and Menez Gwen (37°50'N, 850 M)

(T. Comtet , D. Desbruyères, A. Khripounoff and A. Vangriesheim)

Symbiotic Mussels from the Mid-Atlantic Ridge: Adaptations To Trophic Resources

(A. Fiala-Médioni , C. Cavanaugh, P. Dando and C.L. Van Dover)

Respiration in the Deep-Sea Mussel Commensal Scaleworm, Branchipolynoe Seepensis

(S. Hourdez, C. Jouin-Toulmond and F.H. Lallier)

First Isolation of Thermophilic Aerobic Heterotrophic Bacteria and Spore-Forming Bacilli from the Snake Pit (Mid-Atlantic Ridge) Hydrothermal Area

(V.T. Marteinsson, J.L. Birrien, J.K. Kristjansson and D. Prieur )

Trophic Ecology of Rimicaris Exoculata from TAG As Revealed By Relative Abundances and Isotopic Compositions of Individual Fatty Acids

(G. Rieley , C.L. Van Dover, D.B. Hedrick and G. Eglinton)

Biological Session: Poster Presentations

Hemocyanin Structure and Function in Alvinocaridean Shrimps

(F.H. Lallier and J.-P. Truchot)

Bacteriology of Hydrothermal Plumes from the Mid-Atlantic Ridge

(J.D. O'Brien, D. Eardley, M. Carton and J. Patching

Azores Region (40°N to 33°N): Oral Presentations

Sediment Deposits and Tracers of Hydrothermal Activity South of the Azores, 37°N - 39°N

(G.A. Auffret, B. Dennielou, A. Boelaert, H.D. Needham, T. Richter, C. Organo, J. L. Reyss, C. Müller and P. Watremez)

Seismicity and Seismic Structure of the Axial High Near 35°N

(A.H. Barclay , D.R. Toomey, G.M. Purdy and S.C. Solomon)

Sea-Floor Mineral Deposits: The Ancient Examples

(F.J.A.S. Barriga )

Contrasted Volcano-Tectonic Activities at 34°N and 35°N on the Mid-Atlantic Ridge: A Submersible Study

(D. Bideau, R. Hékinian, C. Bollinger, M. Constantin, E. Gracia, C. Guivel and B. Sichler)

MARFLUX/ATJ. Hydrothermal Activity along the Mid-Atlantic Ridge Axis, in the Area of the Azores Triple Junction. Mn, CH4, He Plumes from Dynamic Hydrocasts

(H. Bougault, J.R. Knoery, J.L. Charlou, H.D. Needham, P. Appriou, M. Aballéa, P. Jean Baptiste,
C.R. German, J.M.A. Miranda and C.H. Langmuir)

Deformation Patterns of Oceanic Second-Order Discontinuities: Analog Modelling

(O. Dauteuil)

Near Seafloor Distribution of Hydrothermal Tracers (Sulfide, Methane, Manganese) in Lucky Strike and Menez Gwen Segments

(J.R. Knoery, J.L. Charlou, M. Aballéa, J.P. Donval and Y. Fouquet)

Petrological Systematics of Fourteen Ridge Segments Traversing the Azores Hot Spot

(C.H. Langmuir, J. Reynolds, H. Bougault, T. Planck, D. Dosonie, E. Gier and Y-L Niu)

Evidence for Discontinuous Melt Extraction and High Pressure Polybaric Crystallisation in AMAR/Narrowgate Lavas, 36°N - 37°N on the Mid-Atlantic Ridge

(A.P. le Roex, F.A. Frey and S.H. Richardson)

The Relationship Between Buoyant Mantle Flow and the Mantle Bouguer Anomaly Patterns Observed along the Mid-Atlantic Ridge from 33°N To 35°N

(L.S. Magde, D.W. Sparks and R.S. Detrick)

Azores Region (40°N to 33°N ): Poster Presentations

Seismic Anisotropy of Zero-Age Oceanic Crust at 35°N

(A.H. Barclay, D.R. Toomey, G.M. Purdy and S.C. Solomon)

Observation and Characterization of Hydrothermal Plume Signals from 23°N To 41°N on the Mid-Atlantic Ridge

(C.S. Chin and G. Klinkhammer)

Elastic Thickness of the Lithosphere of the Azores Plateau Deduced from Gravity Data

(J.F. Luis and J.M.A. Miranda)

Geochemistry of Sediments from the Neovolcanic Zone of the Mid-Atlantic Ridge, 33°N - 40°N:
An Effective Tool for Hydrothermal Prospecting

(E. Gier and C.H. Langmuir)

Volcanic and Morphological Features at the Mid-Atlantic Ridge Axis South of the Azores (37°N - 39°N): A Study at the Submersible Scale

(H. Ondréas, Y. Fouquet, I. Costa, N. Lourenço, M.K. Tivey and G.A. Auffret)

Sediment Sources and Metal Accumulation Rates at the Mid-Atlantic Ridge South of the Azores
(37°- 39°N)

(T.O. Richter, E. Suess, G.A. Auffret and M. Sarnthein)

Asthenosphere Flow Model of the North Atlantic

(M. Yale and J. Phipps Morgan)

Hayes FZ (33°N) to Kane FZ (24°N) Region:

Oral Presentations

Accretion Processes in the Axial Valley of the Mid-Atlantic Ridge 27°N - 30°N from TOBI Side-Scan Sonar Images

(A. Briais, H. Sloan, B.J. Murton and L.M. Parson)

Geological Studies at Sites of Presumed Hydrothermal Activity Between 25°30'N and 28°50'N,
Mid-Atlantic Ridge

(G.A. Cherkashev and I.M. Poroshina)

Seamount Production and Evolution in the Western North Atlantic Ocean, 25°30' - 27°10'N

(G.Jaroslow, D.K. Smith and B.E. Tucholke)

Evolution of the Mid-Atlantic Ridge Between 28°N and 31°30'N, During the Last 10 Ma: Implications from 3D Gravimetric and Magnetic Study

(C. Rommevaux, J. Pariso, P. Patriat, J.-C. Sempéré and C. Deplus)

Mafic- and Ultramafic-Hosted Hydrothermal Systems at the TAG (26°N) and Fifteen-Twenty Fracture Zone Areas of the Rift Valley of the Mid-Atlantic Ridge

(P.A. Rona, H. Bougault, J.L. Charlou, Y. Fouquet and P. Jean-Baptiste)

Detailed Volcanic Geology, Geochemistry and Tectonics of the MARNOK Area (Mid-Atlantic Ridge North of Kane)

(N.K. Lawson, R.C. Searle, J.A. Pearce, P. Browning, P.D. Kempton and S. Allerton)

Hayes FZ (33°N) to Kane FZ (24°N) Region:

Poster Presentations

Along-Axis Variations in Lithospheric Stress at Slow-Spreading Mid-Ocean Ridges

(D.K. Blackman)

Segmentation, Tectonism and Strength of the Oceanic Lithosphere on the West Flank of the Mid-Atlantic Ridge (25°30'N - 27°10'N) Inferred from Coherence Between Bathymetry and Gravity

(J. Escartín and J. Lin)

Fluxes 1: A BRIDGET Survey of the Broken Spur Segment, 29°N, Mid-Atlantic Ridge

(M.D. Rudnicki and C.R. German)

In-Situ Temperature and Gamma Spectrometry Measurements in Diffuse Flow from the TAG Hydrothermal Field at 26°N on the Mid-Atlantic Ridge

(D. Kadko)

High-Resolution TOBI Study of the Broken Spur Segment, Mid-Atlantic Ridge, 29°N

(R.C. Searle, N.C. Mitchell, J. Escartín, A.P. Slootweg, S. Russell, P.A. Cowie, S. Allerton,
C.J. Macleod, T. Tanaka, C. Flewellen and I. Rouse)

Variation of Bathymetric, Gravity and Magnetic Signals with Distance from the Ridge Axis: Implications for the Evolution of Young Oceanic Lithosphere

(H. Sloan, P. Patriat and C. Rommevaux )

Volcanological Insights Gained from Integrating TOBI Side-Scan Sonar and Surface Collected Magnetic and Multibeam Bathymetry Data at the Mid-Atlantic Ridge (24°- 30°N)

(D.K. Smith and M.A. Tivey)

Linking the Thermal and Chemical Composition of Hydrothermal Fluids with Vent Plume Processes for Cadmium, Copper, Lead and Zinc

(J.H. Trefry, S. Metz, R.P. Trocine, D.A. Butterfield, G.J. Massoth and R.A. Feely)

Microearthquake Characteristics and Crustal Velocity Structure at 29°N on the Mid-Atlantic Ridge:
The Architecture of a Slow-Spreading Segment

(C.J. Wolfe, G.M. Purdy, D.R. Toomey and S.C. Solomon)

Kane FZ (24°N) To 15°N Region: Oral Presentations

Ultramafic and Gabbroic Rocks Exposed in the 23°N Region (Mid-Atlantic Ridge): A Record of Melt Migration and Crystallization in a Sub-Axial Root of Mantle Lithosphere?

(M. Cannat, I. Ghose and C. Mével)

Time/Space Variations in Seafloor Spreading in the MARK Area: The Past 1 Ma of Crustal Accretion along 100 Km of the Mid-Atlantic Ridge

(J.A. Karson, S.D. Hurst, R.M. Lawrence and D. Gao)

15°N, Mid-Atlantic Ridge - Logatchev Hydrothermal Field

(S.G. Krasnov*, G.A. Cherkashev, I.M. Poroshina, Y. Fouquet, D. Prieur and A.M. Ashadze)

Ultramafic and Gabbroic Rocks Exposed in the 23°N Region Mid-Atlantic Ridge: Penetration of Seawater in the Oceanic Lithosphere

(C. Mével, P. Agrinier, M. Cannat and E. Marion)

Kane FZ (24°N) To 15°N Region: Poster Presentation

Deformation and Hydrothermal Alteration History of Progressively Cooled Gabbros in the MARK Area, and the Structural Evolution of Slow-Spread Lower Oceanic Crust

(Y. Dilek, P. Thy and P.D. Kempton)

Iceland and Iceland Region: Oral Presentations

The Dynamic Evolution of the Iceland Mantle Plume: The Lead Isotope Constraints

(B.B. Hanan* and J.-G. Schilling)

Prograding Transform Zone in an Overlapping Spreading Center, New Insights from Southern Iceland

(P. Luxey, P. Blondel and L.M. Parson)

Iceland and Iceland Region: Poster Presentations

U-Series Disequilibrium Study of Mid-Ocean Ridge Basalt Glasses from the Reykjanes Ridge

(D.W. Peate, P.W. van Calsteren, C.J. Hawkesworth, R.N. Taylor and B.J. Murton)

Kilometer-Scale Chemical Variations along the Middle Kolbeinsey Ridge Spreading Segment:
The Behaviour of the Sub-Axial Magmatic System on a Slow-Spreading Ridge

(M. Wieneke, C.W. Devey and D. Ackermand)

Other Oceans: Oral Presentations

Seismicity in the South Atlantic Near Ascension and St. Helena Islands

(J. A. Hanson and H.K. Given)

Petrological and Geochemical Variability of Basalts from Spreading Ridges in the Indian Ocean

(J.H. Natland, R.L. Fisher, H.J.B. Dick, J.J. Mahoney and S.H. Bloomer)

Other Oceans: Poster Presentations

Temporal Variation of Crustal Emplacement, 33°S on the Mid-Atlantic Ridge

(G.A. Neumann, P.J. Michael and B.B. Hanan)

Variations in Spreading Rates, Plate Boundary Geometry and Magnetic Structure of the Southern
Mid-Atlantic Ridge During the Past 12 Ma

(C.M. Weiland, N.R. Grindlay and P.J. Fox)