Award Abstract # 0407928
Quantitative Modeling of Gas Migration in Layered Intrusions

NSF Org: EAR
Division Of Earth Sciences
Recipient: DUKE UNIVERSITY
Initial Amendment Date: October 25, 2004
Latest Amendment Date: November 8, 2005
Award Number: 0407928
Award Instrument: Continuing Grant
Program Manager: Sonia Esperanca
EAR
 Division Of Earth Sciences
GEO
 Directorate for Geosciences
Start Date: January 1, 2005
End Date: December 31, 2007 (Estimated)
Total Intended Award Amount: $168,875.00
Total Awarded Amount to Date: $168,875.00
Funds Obligated to Date: FY 2005 = $90,678.00
FY 2006 = $78,197.00
History of Investigator:
  • Alan Boudreau (Principal Investigator)
    boudreau@duke.edu
Recipient Sponsored Research Office: Duke University
2200 W MAIN ST
DURHAM
NC  US  27705-4640
(919)684-3030
Sponsor Congressional District: 04
Primary Place of Performance: Duke University
2200 W MAIN ST
DURHAM
NC  US  27705-4640
Primary Place of Performance
Congressional District:
04
Unique Entity Identifier (UEI): TP7EK8DZV6N5
Parent UEI:
NSF Program(s): Petrology and Geochemistry
Primary Program Source: app-0105 
app-0106 
Program Reference Code(s): 0000, OTHR
Program Element Code(s): 157300
Award Agency Code: 4900
Fund Agency Code: 4900
Assistance Listing Number(s): 47.050

ABSTRACT

Boudreau
EAR-0407928

The main objective of this proposal is to improve the quantitative modeling of compaction and silicate liquid and gas infiltration and application of this modeling to layered intrusions. More specifically, this research will employ improved and more complex gas speciation models to study the effect of fluid migration and the formation of sulfide-hosted platinum-group element (PGE) deposits in layered intrusions. A second aspect of this work will be to expand quantitative modeling to include Cr components in pyroxene and applications to understanding the formation of chromitite layers in these intrusions. This latter work will include field, petrographic and geochemical study of chromites from the Bushveld Complex in South Africa to "ground truth" results and predictions from the modeling work.

The broader impacts of this work will be in the support of education and training of a graduate student and possibly of interested undergraduates doing independent research projects. Computer programs that result from this study will be made available for any interested party to use in both teaching and research. It will have implications also for the petrogenesis and exploration of economic mineral deposits (PGE and Cr) in layered intrusions.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Boudreau, A.E., and Simon, A. "Halogen variations and degassing in the Basement Ferrar sill, Antarctica." Journal of Petrology , v.48 , 2006 , p.1369
Lindstrum, C.C., Boudreau, A.E., and Pertermann, M. "Diffusion-reaction in a thermal gradient: Implications for the Genesis of anorthitic plagioclase, high alumina basalt and igneous mineral layering." Earth & Planetary Science Letters , v.273 , 2005 , p.829

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