NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Metal-Silicate Partitioning of Tungsten from 10 to 50 GPaGeochemical models of core formation are commonly based on core and mantle abundances of siderophile elements that partitioned between silicate and metal in a magma ocean in the early Earth. Tungsten is a moderately siderophile element that may provide constraints on the pressure, temperature, composition, and oxygen fugacity conditions, and on the timing of core formation in the Earth. Previous experimental studies suggest that pressure exerts little to no influence over W metal-silicate partitioning up to 24 GPa, and indicate that the stronger influences are temperature, composition, and oxygen fugacity. However, core formation models based in part on W, predict metal-silicate equilibration pressures outside the available experimental pressure range, requiring extrapolation of parameterized models. Therefore, higher pressure experimental data on W were needed to constrain this important parameter.
Document ID
20140011744
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Shofner, G. A. (Towson Univ. Towson, MD, United States)
Campbell, A. J. (Chicago Univ. Chicago, IL, United States)
Danielson, L. (Jacobs Technology, Inc. Houston, TX, United States)
Rahman, Z. (Jacobs Technology, Inc. Houston, TX, United States)
Righter, K. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
September 16, 2014
Publication Date
March 17, 2014
Subject Category
Geophysics
Lunar And Planetary Science And Exploration
Report/Patent Number
JSC-CN-30389
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 17, 2014
End Date: March 21, 2014
Sponsors: Lunar and Planetary Inst.
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available