Goldschmidt 2000 Daily Programme

Cambridge Publications

Publishing for Science


Goldschmidt 2000

An International Conference for Geochemistry

September 3rd - 8th 2000

Oral Sessions, Monday, 4th September, 09:00 - 12:00



Symposium A

Terrestrial Planets and Meteorites

Convenors: Alex Halliday & Ed Young.

Location: Clarendon Lindemann.

09:00 Osmaston M:

A new Scenario for Forming the Solar Planetary System; Dynamics, Cores and Chemistry

09:15 Yin Q & Jacobsen S:

Supernova Isotopic Signatures in Carbonaceous Chondrites: Implications for CHUR Parameters

09:30 McKeegan KD, Chaussidon M & Robert F:

Lived 10Be in a Refractory Inclusion from the Allende Meteorite: A Case for Intense Irradiation of the Protosolar Nebula?

09:45 Leya I, Wieler R & Halliday AN:

The Influence of Cosmic Ray Production on Extinct Nuclide Systems

10:00 Münker C, Weyer S, Mezger K, Rehkämper M, Wombacher F & Bischoff A:

92Nb-92Zr in the Early Solar System

10:15 Sanloup C, Blichert-Toft J, Télouk P, Gillet P & Albarède F:

Evidence for Extinct 92Nb Radioactivity in Chondrites and SNC Meteorites

10:30 Dauphas N, Marty B & Reisberg L:

In Search of Live 97Tc in the Early Solar System

10:45 Henkel T, Stephan T, Jessberger EK, Hoppe P & Strebel R:

TOF-SIMS Analysis of Presolar SiC X-grains

11:00 Verchovsky A, Wright I, Fisenko A, Semjonova L & Pillinger C:

Ion Implantation into Presolar Diamonds: Experimental Simulation

11:15 Whitby J, Turner G, Russell S & Gilmour J:

I-Xe Dating of CAI's and Chondrules from CV3 Meteorites

11:30 Miller MF, Franchi IA & Pillinger CT:

A New Source of Mass Independent Fractionation of Oxygen Isotopes: Evidence and Geochemical Implications

11:45 Galy A & O'Nions RK:

Is There a CHUR for Mg?
Programme for the Next Session in Symposium A




Symposium C

Subduction Zone Processes

Convenors: Jon Blundy, Chris Hawkesworth & Dave Rubie.

Location: Clarendon Townsend.

09:00 Revillon S, Barr S, Brewer T, Harvey P, Tarney J & Leg 185 Shipboard Scientific Party:

The Importance of Core-log Integration in Calculations of Element Budgets; Mariana Subduction Factory, ODP Leg 185, Site 801C

09:15 Ishizuka O, Nesbitt RW, Taylor RN, Yuasa M, Uto K & Hochstaedter AG:

Spatial and Temporal Variation of Back-arc Volcanism in the Izu-Bonin Arc ­ Chemical Variation in Relation to Volcano-tectonic History

09:30 Morris J & Tera F:

Beryllium Isotope Systematics of Volcanic Arc Cross-chains

09:45 Kempton PD, Pearce JA & Tappin D:

Hf Isotope Evidence for Mantle Domain Boundaries in the Western Pacific

10:00 Dosseto A & Bourdon B:

238U-234U-230Th-226Ra and 235U-231Pa Radioactive Disequilibria in Volcanic Rocks from Kamchatka, Russia

10:15 Macpherson C, Forde E, Hall R & Thirlwall M:

Spatial and Temporal Evolution of Magmatism in an Arc -Arc Collision: The Halmahera and Sangihe Arcs, Eastern Indonesia

10:30 Brueckner HK:

Geochemistry and Age Patterns of Garnet Peridotite in Subducted Continental Crust

10:45 Discussion:

11:00 Davies JH:

KEYNOTE Thermal Structure, Water Transport, and Melt Propagation at Subduction Zones

11:30 Bourdon B, Turner S & Allègre C:

231Pa-235U Systematics and the Time Scales of Melting Processes beneath the Tonga-Kermadec Arcs

11:45 Asmerom Y, Mukasa S, Cheng H & Edwards RL:

Pa-Th-U Constraints on Melting and Material Recycling in Subduction Zones: A Case Study of the Philippine Arcs
Programme for the Next Session in Symposium C




Symposium D

Rapid Climate Change (Continents/Oceans)

Convenors: Edouard Bard & Frank McDermott.

Location: Physical Chemistry.

09:00 Sharma M:

Long-term Variations in Solar Magnetic Activity: Is There a Sun-Climate Connection?

09:15 Ihlenfeld C, Webb J, Maas R & Drysdale R:

The Record of El Niño Events in Terrestrial Carbonates: Preliminary Results of a High-resolution Isotope and Trace Element Study

09:30 Tamburini F, Adatte T, Steinmann P & Föllmi K:

Phosphorus Geochemistry of Marine Records: Examples from Diverse Oceanographic Settings

09:45 Kaljo D & Martma T:

Carbon Isotopic Test of Silurian Oceanic Episodes

10:00 Pomies C & Davies G:

Neodymium Isotopes in Modern Foraminifera from Indian Ocean: Assessment of the Use of Nd Isotope Composition of Foraminifera as a Tracer for Palaeo-oceanic Circulation Changes

10:15 Brassell S & Wang R:

Molecular Signals of Climatic Change Over the Last 30,000 Years in Zabuye Salt Lake Sediments, Tibet

10:30 Nagler TF & Eisenhauer A:

*44Ca-Temperature Calibration on Fossil and Cultured G. sacculifer: A new Proxy for the Reconstruction of Palaeo Sea Surface Temperature (SST) Fluctuations

10:45 Vlastélic I, Abouchami W, Galer S, Claude-Ivanaj C & Hofmann A:

The Distribution of Lead Isotopes in the Indian Ocean

11:00 Sarma VVSS, Bard E & Hamelin B:

Evidence for Diagenetic Re-distribution of Uranium in the Equatorial Arabian Sea

11:15 Cohen A & Coe A:

An Ultra-high Resolution Record of Miocene Climate Change: The Organic-rich Mudrock Successions of the Monterey Formation, California

11:30 Huang Y, McDermott F, Hawkesworh CJ & Fairchild IJ:

U Isotope Systematics in Four European Stalagmites: New Insights and Implications for Palaeoclimatic Reconstruction

11:45 Beets CJ & Beets DJ:

The Penultimate Deglaciation in Western Europe: A Case-study from Amsterdam Basin, The Netherlands
Programme for the Next Session in Symposium D




Symposium E

Biological Geochemistry

Convenors: Matthew Collins, Derek Lovely & Rob Raiswell.

Location: Oxford University Museum.

09:00 Knoll A:

KEYNOTE Biological Signatures in the Rock Record

09:30 Engel M & Macko S:

Life Prior to the Terrestrial Rock Record

09:45 McDonald G, Bada J, Brinton K, Glavin D, Dorn E & Storrie-Lombardi M:

Search Strategies for Organic Bio-signatures in Extraterrestrial Samples

10:00 Butterfield NJ:

The Early Evolution of Eukaryotic Heterotrophy

10:15 Love GD:

Exploring Biomarker Lipid Information Preserved in Complex Macromolecules

10:30 Fleck S, Michels R, Faure P, Schlepp L, Elie M, Ashkan S & Landais P:

Constraints on the Paleoenvironement Interpretation of Steranes from Ancient Sediments

10:45 Abbott G, Edwards D, Drage T & Vane C:

Molecular Characterization of Some of the Earliest Terrestrial Organisms

11:00 Schouten S, Özdirekcan S, van Dongen BE, van der Meer MT & Sinninghe Damsté JS:

Compound-Specific Stable Carbon Isotopes: The Effect of Biosynthetic Pathways

11:15 van Duin A & Collins M:

Investigation into Amino Acid Racemization Pathways Using Computational Chemical Methods

11:30 Nguyen R & Harvey R:

Preservation of Protein in Phytodetritus and Sediments via Macromolecular Aggregations

11:45 Schall M, Ostrom P, Leykam J, Gandhi H, McNulty T & Gage D:

New Insights into Ancient Proteins from Traditional and Novel Mass Spectrometric Approaches
Programme for the Next Session in Symposium E




Symposium G

Flow and Reaction of Fluids in Crust

Convenors: Marian Holness & Terry Seward.

Location: Zoology A.

09:00 Aranovich L:

KEYNOTE The Petrologic Case for a Fluid-Present High-Grade Metamorphism

09:30 Walther JV:

Darcy Flow at Fluid Pressure Equal Rock Pressure

09:45 Lewis S, Graham C, Thomas C, Bond C & Holness M:

Time-scales and Mechanisms of Metamorphic Fluid Flow from Integrated Textural and 18O/16O Micro-analysis Studies of Metacarbonates: Evidence for Transient Flow Events

10:00 Matthews A, Putlitz B, Gutkin V & Hamiel Y:

Volatile Transport and Fluid-Rock Interaction in Aplites and Pegmatites Associated with the Crystallization of Anatectic Melts, Naxos, Greece

10:15 McCaig AM, Guest R, Graham C & Banks D:

Generation of Permeability in Metamorphic Rocks by Reaction with Basinal Brines: Dolomitisation in the SW Highlands of Scotland

10:30 Jamtveit B, Malthe Sörenssen A & Austrheim H:

Retrogressive Metamorphism: Mechanisms of Fluid Introduction to Impermeable Rocks

10:45 Nabelek P:

Lithologically-controlled Fluid Pathways on Thin-section Scale in the Notch Peak Calc-silicate Contact Aureole, Utah, USA

11:00 Wada H:

Microscale Stable Isotopic Zonation in the Crust and Formation of Isotopic and Chemical Fronts During Contact Metamorphism

11:15 Touret JL:

Fluids and Melts in Lower Crustal Granulites: The Inclusion Evidence

11:30 Gleeson S, Grant K & Roberts S:

Fluid Inclusion *D in Quartz Does Not Always Indicate the Source of Palaeo-hydrothermal Fluids

11:45 Banks D & Yardley B:

Tracking Brines in Crustal Processes
Programme for the Next Session in Symposium G




Symposium J

Mantle Dynamics and Melting

Convenors: Tim Elliott & Erik Hauri.

Location: Clarendon Martin Wood.

09:00 Hauri E:

KEYNOTE Mantle Components and Mantle Reservoirs: Bridging the Disconnect

09:30 Michel L:

New Interpretation of Earth-mantle Heterogeneities Favoring a Whole Convective Mantle Structure

09:45 Joron J, Treuil M, Lewin É & Allègre C:

Trace Elements Systematics in Basalts: A Global Approach

10:00 Discussion:

10:15 Eiler J, Kitchen N, Gronvold K, McKenzie D, Stracke A & Zindler A:

Oxygen Isotope Variations in Recent Magnesian Lavas from Iceland's Northern Neovolcanic Zone

10:30 Elliott T & Koetsier G:

U-Th Disequilibrium from Picrites to Tholeiites in the Iceland Rift

10:45 Smit Y, Parkinson I, Hawkesworth C, Cohen A & Peate D:

Low 187Os/188Os Isotope Ratios in Icelandic Basalts

11:00 Kempton PD, Fitton JG, Francis D & Lass S:

N-MORB or a Depleted Plume Component? Evidence from Hf-Nd Isotope Systematics of Tertiary Picritic and Basaltic Lava Flows from Baffin Island

11:15 Regelous M, Hofmann AW, Abouchami W & Galer SJG:

The Geochemical Evolution of Hawaiian Magmatism Since the Mesozoic: Evidence from Lavas from the Emperor Seamounts

11:30 Abouchami W, Hofmann A & Galer S:

Lead Isotopic Evidence for Multiple Components in the Hawaiian Plume

11:45 Hofmann AW:

An Endangered Geochemical Paradigm? The Relationship of Melts to Sources
Programme for the Next Session in Symposium J




Symposium K

Life in Extreme Environments

Convenors: Mike Russell & Everett Shock.

Location: Earth Sciences.

09:00 Shock E:

KEYNOTE Characterizing the Biotic Fringe in Hydrothermal Ecosystems

09:30 Amend J:

Novel Hyper-thermophiles from Well-known and Previously Unexplored Shallow Marine Hydrothermal Sites

09:45 Summit M & Baross J:

Using Microbiology as a Tool to Explore Mid-ocean Ridge Sub-seafloor Systems

10:00 Meyer DR, Shock EL & Amend JP:

Geochemical Microenvironments in Hydrothermal Ecosystems

10:15 Manning DAC & Cross MM:

Rates and Mechanisms of Thermochemical Sulphate Reduction in Ocean Ridge Hydrothermal Systems: Implications for Nutrient Supply to Ocean Ridge Communities

10:30 Helgeson HC, Afonso GJ & LaRowe DE:

Thermodynamic Calculation of the Relative Stabilities of Enzymes, DNA, and Other Biomacromolecules Under Extreme Conditions of Temperature and pH

10:45 Russell MJ, Hall AJ & Mellersh AR:

The First Bacterial Habitats: What was Normal, What was Extreme?

11:00 Lovley D, Kashefi K, Tor J, Vargas M & Reysenbach A:

Microbial Reduction of Iron in Hot Environments: Implications for the Geochemistry of Ancient and Modern Environments

11:15 Konhauser K, Phoenix V & Adams D:

The Role of Biomineralization as an Ultraviolet Shield

11:30 Rosing M & Frei R:

Getting out of the Extreme: Possible Indications of Pre-3700 Ma Oxygenic Photosynthesis from Isua, West Greenland

11:45 Vreeland R, Rosenzweig W, Lowenstein T & Powers D:

Alive After 250 Million Years: Isolation of Live Permian Microorganisms
Programme for the Next Session in Symposium K




Symposium L

Computational Geochemistry

Convenors: John Brodholt & Keith Refson.

Location: Zoology B+C.

09:00 Sprik M & Boek E:

KEYNOTE Ab Initio Molecular Dynamics Simulation of Model Smectite Clay System

09:30 de Leeuw NH & Parker SC:

Modelling the Effect of Magnesium and Cadmium Ions on Calcite Growth and Dissolution

09:45 Ojo S, Slater B & Catlow R:

The Computer Simulation Of Calcite Growth Inhibition: A Monophosphonate Study

10:00 Becker U, Risthaus P & Bosbach D:

Molecular Simulations and AFM Observations on the Interaction of Organic Growth Inhibitors and Ionic Strength on the Crystal Growth of Barite and Celestite

10:15 Dysthe DK, Porcheron F & Rousseau B:

Molecular Simulation of Pressure Solution Interfaces ­ Diffusion and Dynamic Interface Structure

10:30 Chialvo A, Simonson JM & Cummings P:

KEYNOTE Molecular Simulation of Hydrothermal Solutions

11:00 Weare JH, Duan Z & Moller N:

Molecular Simulation of the Thermodynamic Properties of Natural Fluids: Liquid/Vapor Equilibria in and Around the Critical Region in the Water System

11:15 Tossell J:

Theoretical Studies on Synergistic Interactions between Transition Metals and Heavy Metalloids

11:30 Vinograd VL & Putnis A:

Spin Models of Aluminosilicates

11:45 Allan NL, Blundy JD, Purton JA & Lavrentiev MY:

Mineral Simulations at High Temperatures and/or High Pressures ­ Monte Carlo, Lattice Dynamics and Ab Initio Studies
Programme for the Next Session in Symposium L




Symposium O

Mantle Geochemistry

Convenor: Nigel Harris.

Location: Inorganic Chemistry.

09:00 Handler M, Wysoczanski R & Gamble J:

Lithospheric Mantle Evolution and Plume-Lithosphere Interaction in Marie Byrd Land, West Antarctica: Sr, Nd, Os and Pb Isotopes in Spinel Peridotite Xenoliths

09:15 Zhang H, Lu F, Liu Y, Zhou X, Sun M & Zhou M:

Fertile Lithosphere Mantle beneath Yangtze Craton: Evidence from a Garnet Lherzolite from Dahongshan Kimberlite, Hubei, China

09:30 Kadik A, Pineau F, Litvin Y, Jendrzejewski N, Martinez I & Javoy M:

Formation of Carbon and Hydrogen Species in Magmas at low Oxygen Fugacity

09:45 White RV, Crowley JL, Nowell GM & Parrish RR:

Probing the Hf Isotope Systematics of the Sub-Continental Mantle at 3.5 Ga: The Tarssartôq Dykes of the Isua Region, Southern West Greenland

10:00 Chinn I, Kyser K & Viljoen F:

Microdiamonds from the Thirsty Lake (Akluilâk) Dyke, Northwest Territories, Canada

10:15 Schmickler B, Jacob D & Foley S:

Sanidine and Orthopyroxene Bearing Eclogite Xenoliths from the Zero Kimberlite Pipe

10:30 Mueller W, Stachel T, Harris JW & Halliday AN:

Isotopic Composition of the Earth's Lower Mantle from Ca-silicate Inclusions in Diamonds

10:45 Koppers A, Phipps Morgan J & Staudigel H:

Contrasting Mantle Convection Models by Modeling their Geochemical Evolution with the Terra Nova Toolbox (TnT2000)

11:00 Gautheron C & Moreira M:

Helium Residence Time in the Subcontinental Mantle

11:15 Weyer S, Muenker C, Rehkaemper M & Mezger K:

Unusually low Zr/Hf and Nb/Ta Ratios in the Depleted Mantle: Precise ID Analysis of Ultra low Concentrations by MC-ICPMS

11:30 Luguet A, Alard O, Lorand J, Pearson N, Ryan C & O'Reilly S:

Platinum Group Elements Geochemistry of Abyssal Peridotites: An Integrated Study in the MARK Area (Mid-Atlantic Ridge, 20-24 N) Using ICP-MS, LAM-ICPMS, SEM and Nuclear Microprobe (NMP)

11:45 McDade P, Burgess S & Harte B:

The Continuing Problems of Ni in Garnet Thermometry: A SIMS Study of Ni in the Jagersfontein Peridotite Garnets
Programme for the Next Session in Symposium O



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