ERC Research Project
      
"Accretion and Early Differentiation of the
Earth and Terrestrial Planets"
(ACCRETE)
European Research Council Advanced Grant
(Contract Number 290568) 2012-2018



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International interdisciplinary workshop
"Accretion and Early Differentiation of the Terrestrial Planets"
Le Saint-Paul Hotel (formerly Maison du Séminaire),
Nice May 26-30, 2014.

Program   (download program )   (Visit the Le Saint-Paul Hotel)

Monday May 26

19.30-21.30  Welcome cocktail
 

Tuesday May 27

08.55Welcome by D. Rubie
Origins (Chair: M. Wieczorek)
09.00-09.30 Chambers: (invited) Planetary accretion - from dust to protoplanets
09.30-09.45 Lambrechts: The Jupiter levee: connecting pebble accretion in the outer disc to terrestrial planet formation
09.45-10.15 Levison: (invited) The Formation of terrestrial planets from the direct accretion of pebbles
10.15-10.30 Ogihara: Formation and dynamical evolution of close-in terrestrial planets
10.30-11.00 Coffee break
11.00-11.30 Walsh: (invited) Formation of the terrestrial planets with LIPAD - including dynamics, accretion and fragmentation
11.30-11.45 Jacobson: Planet formation within the Grand Tack model
11.45-12.00 Rubie: Chemical constraints on the Grand Tack accretion model
12.00-12.15 Discussion
12.15-14.15 Lunch break
Planetesimals and protoplanet precursors (Chair: G. Libourel)
14.15-14.45 Young: (invited) Oxygen isotopes and the oxidation states of the terrestrial planets
14.45-15.15 Chaussidon: (invited) Oxygen and Magnesium isotopic constraints on the presence of planetary fragments in meteoritic chondrules
15.15-15.30 Metzler: How fast did some chondrites accrete?
15.30-15.45 Guillot: Filtering of grains in the protosolar disk as a prerequisite to planet formation
15.45-16.15 Ciesla: (invited) The distribution of volatiles in primitive Solar System bodies
16.15-16.45 Coffee break
16.45-17.15 Bourdon: (invited) Volatile element depletion in early-formed planetesimals
17.15-17.30 Quitte: Metal-rich chondrites : insights into the first steps of metal segregation
17.30-17.45 Kruijer: Protracted core formation in protoplanets inferred from Hf-W chronometry of iron meteorites
17.45-18.00 Rushmer: Deforming chondrules as natural analogs for dynamic metal segregation: Analyses from 3D synchrotron imaging
18.00-18.15 Discussion
 

Wednesday, May 28

Collisions and giant impacts (Chair: P. Michel)
09.00-09.30 Jutzi: (invited) Consequences of global-scale collisions
09.30-09.45 Davison: Impact processing of heterogeneous meteorite parent bodies in the early solar system
09.45-10.00 Sarid: Mercury, the impactor: Fate of projectiles emerging from hit-and-run events in the inner Solar System.
10.00-10.30 Leinhardt: (invited) The origin of Earth’s non-chondritic composition?
10.30-11.00 Coffee break
11.00-11.15 Monteux: Consequences of giant impacts in early Mars: core merging and martian dynamo evolution
11.15-11.45 Melosh: (invited) Dispersion and chemical equilibration of planetesimal cores in accretionary collisions
11.45-12.15 Golabek: (invited) Towards coupled giant impact and long term interior evolution models
12.15-12.30 Discussion
12.30-14.30 Lunch break
Consequences of the Moon-forming collision on Earth (Chair: D. O’Brien)
14.30-15.00 Marty: (invited) Origin and early evolution of the terrestrial atmosphere: implications for the age of the Moon, the rate of continental crust growth, and the evolution of the young Sun
15.00-15.15 Nakajima: The initial state of Earth’s mantle after the Moon-forming impact
15.15-15.30 Lock: Was the atmosphere lost during the Moon-forming event?
15.30-16.00 Stewart: (invited) Atmospheric blow-off and melting during the giant impact stage of planet formation
16.00-16.15 Tucker: Terrestrial volatile abundances reflect different fates during giant impacts
16.15-18.30 Coffee break & Poster session
18.45: Buses leave for social event at Nice Observatory
 

Thursday, May 29

Moon formation and evolution (Chair: A. Crida)
09.00-09.30 Canup: (invited) Implications of the Moon-forming impact for late stage terrestrial accretion
09.30-10.00 Kleine: (invited) Tungsten isotopes and the origin of the Moon
10.00-10.30 Bottke: (invited) The evolution of giant impact ejecta and the age of the Moon.
10.30-11.00 Coffee break
11.00-11.15 Charnoz: Evolution of the protolunar disk from the impact to the assembling of the Moon
11.15-11.30 Pahlevan: Excitation of the lunar inclination via three-body interactions
11.30-12.00 Muenker: (invited) The evolution of the Earth-Moon system constrained from refractory and volatile trace elements
12.00-12.15 Discussion
12.15-14.15 Lunch break
Physical aspects of Core formation (Chair: J. Siebert)
14.15-14.45 Tackley: (invited) Influence of formation and early differentiation processes on long-term evolution of terrestrial planets
14.45-15.15 Deguen: (invited) Turbulent metal-silicate mixing, fragmentation, and equilibration in magma oceans
15.15-15.30 Landeau: Laboratory experiments on metal fragmentation in a magma ocean
15.30-15.45 Wacheul (Monteux): Fluid dynamics experiments on the breakup of liquid metal diapirs
15.45-16.00 de Vries: Melting during planetary formation
16.00-16.30 Coffee break
Chemical aspects of core formation (Chair: B. Wood)
16.30-17.00 Van Westrenen: (invited) Trace element constraints on core formation in the Moon and Mars
17.00-17.15 Savage: Copper isotopes and the role of sulphides during Earth’s differentiation
17.15-17.30 Fischer: Metal-silicate partitioning of Co, Ni, V, Cr, Si, and O up to 100 GPa and 5500 K
17.30-17.45 Vogel: The Dependence of siderophile element partitioning on pressure, temperature, fO2 and Si- and S-contents.
17.45-18.00 Piet: Accreting the Earth and Forming its Core: Experimental and Theoretical Constraints
18.00-18.15 Laurenz: Metal-silicate partitioning of highly siderophile elements in S-bearing systems- Implications for the formation of Earth’s core
18.15-18.30 Genske: Experimental investigation of Cr isotope fractionation during core formation
18.30-18.45 Dwyer: The influence of multi-modal collisional outcomes on bulk composition and Hf/W isotopic systematics
18.45-19.00 Discussion
 

Friday, May 30

Earth composition (Chair: M. Moreira)
09.00-09.30 Fitoussi: (invited) Mars: A major ingredient to the Earth’s recipe
09.30-09.45 Andrault: Early cosmochemical fractionation through collisional erosion, a solution to the enstatite chondrite Earth model
09.45-10.15 Stevenson: (invited) State of the core
10.15-10.30 Blanchard: Light elements in the core: Constraints from Gallium metal-silicate partitioning experiments
10.30-11.00 Coffee break
11.00-11.15 Campbell: Sulfur contents of planetary and protoplanetary cores
11.15-11.30 Caracas: Constraints on the inner core composition from mineral physics.
11.30-12.00 Ballhaus: (invited) Effect of core merging on the sulfur, selenium, and tellurium contents of the Earth’s mantle.
12.00-14.00 Lunch break
Late Accretion/Veneer (Chair: C. Dale)
14.00-14.30 Halliday: (invited) The origin of Earth’s volatiles : not a Late Veneer !
14.30-14.45 Marchi: The bombardment of the Earth during the Hadean and early Archean eras: A new look at the late accretion
14.45-15.15 Raymond: (invited) Dynamical and collisional constraints on a stochastic late veneer on the terrestrial planets
15.15-15.30 Andrews-Hanna: Geophysical constraints on the accretion, early thermal evolution and bombardment history of the Moon and Mars
15.30-15.45 Morbidelli: Late accreted mass: How much material?
15.45-16.00 Nimmo: Mantle heterogeneity and the late veneer
16.00-16.30 Coffee break
16.30-16.45 Becker: Terrestrial and lunar constraints on the composition of the late veneer: primitive, but slightly different from chondrites?
16.45-17.00 Fischer-Gödde: Origin of the late veneer inferred from Ru isotope systematics
17.00-17.15 Foing: Accretion and early evolution: what should future lunar missions tell us?
17.15-18.00 General conclusions and farewell.
Posters

Cartier: Redox control on Nb/Ta fractionation during planetary accretion

Delbo: Search for the metallic cores of differentiated planetesimals in the asteroid main belt

Elfers: In search for the Earth's building blocks: Hf and W composition of chondrite leachates and residues

Kremser: Investigation of Ga and Cd isotope fractionation during evaporation and re-condensation

Lourenco: Early evolution and dynamics of Earth from a molten initial stage

Matthes: Pd-Ag evidence for rapid cooling of iron meteorite parent bodies

Miyajima (Fisher): Quantitative chemical analysis of carbon and oxygen in molten Fe-rich alloy by analytical transmission electron microscopy

Myhill: Melting of a partially oxidised upper mantle: an oxygen filter for the Earth?

O’Rourke: Magnesium exsolution in Earth’s Core?

Peters: Studying late accretion and planetary differentiation using the 184Os-180W decay system

Petitgirard: P-V equation of state of deep Earth’s mantle-like glasses

Pfeifer: High-precision tantalum isotope measurements of meteorites by MC-ICPMS.

Posner: Si and Cr diffusion in liquid iron: kinetic implications for the chemical evolution of planetesimal cores

Pringle: Silicon isotopes in achondrites and clues to planetary differentiation

Salmon: Accretion of the Moon from the protolunar disk: canonical Vs non-canonical

Samuel: The early evolution of Mars’ mantle and crust

Seclaman: Minor elements in silicate melts from ab initio calculations

Siebert: Sulfur isotopes fractionation between metal and silicate at high pressure and high temperature

Sossi: Iron isotopes on Mars linked to the formation of the terrestrial planets

Suer: The metal/silicate partition coefficients of highly siderophile elements during core formation

Wang: New constraints on the abundances of siderophile volatile elements in Earth’s mantle