HighP Melts Grand Challenge

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High-P Melts Grand Challenge
Ultimate Goal A Universal Model of the Liquid
Phase Predict all relevant physical and
chemical properties and Assimilate all types of
data (structure, equilibria, physical properties,
etc.) Near term goal Physical Properties of
Simple Silicate Melts and Mantle Melts Partial
Molar Volumes/Compressibilities of Liquid Oxide
Components (P,T)
August Deadline NSF CSEDI Panel
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COMPRES sponsored workshop on High-P Melts Los
Poblanos Inn, Albuquerque NM July 22-23, 2005
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Workshop on High-P Melts
Carl Agee Tom Ahrens Paul Asimow Jay Bass Jiuhua
Chen Don Dingwell Yingwei Fei Zhicheng Jing Shun
Karato Becky Lange Chip Lesher Baosheng Li Jie
Li Bob Liebermann Murli Manghnani Dave Rubie Jim
Rustad Rick Secco Guoying Shen Jonathan
Stebbins Lars Stixrude Dave Tinker Yanbin
Wang Quentin Williams Yusheng Zhao
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High-P Melts Grand Challenge
High-P Melts Grand Challenge would be a highly
focused effort to carry out an array of
measurements/computations on simple silicate
melts and mantle melts. This activity would
produce the best available data set for
equation-of-state and other properties, that are
urgently needed to understand melting phenomena
during early differentiation of the Earth (e.g.
magma ocean) and in the modern Earths upper
mantle, transition zone, D layer, and CMB. The
new data set sets the gold standard that would
form the basis for the longer term goal of
establishing a Universal Model of the Liquid
Phase The Universal Model of the Liquid Phase
enables us to predict all relevant physical and
chemical properties of melting and embodies all
types of data (structure, equilibria, physical
properties, etc.) on melts and melting.
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Density Crossovers
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High-P Melts Grand Challenge Task 1 Simple Melts

• Determine the densities and compressibilities of
  liquids in the binary system fayalite-forsterite
  as a function of pressure and temperature.
• Determine the effect of added SiO2 to
  fayalite-forsterite liquids
• Establish a Bottinga and Weill style data base of
  partial molar volumes/compressibilities of liquid
  oxides for calculating melts at high pressure.

• Techniques/Teams
• Ex-situ static compression sink/float, fusion
  curve.
• In-situ (beamlines) static compression
  sink/float, falling sphere, ultrasonics
• Preheated shockwave (dynamic compression)
• Quantum molecular dynamics calculations
• Glass analysis techniques, if possible (SiO2-rich
  compositions)
• Centralized sample synthesis (Provided by D.
  Dingwell, Munich)

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High-P Melts Grand Challenge Task 2 Mantle Melts
Determine the physical properties of liquids
ranging from basalt to peridotite (controlled by
liquid olivine addition)
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High-P Melts Grand Challenge Additional Tasks

• Effect of H2O, CO2 on silicate melt properties
• Core/metallic melts
• Equipment and technique development