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Browse MARGINS Awards in reverse chronological order after start date (most recent first):

Collaborative Research: Volatiles (H20 and CO2) in Mariana and Izu Arc Magmas

MARGINS Focus Area Subduction Factory
NSF Org OCE
Latest Amendment Date September 7, 2000
Award Number 0001821
Award Instrument Standard Grant
Program Manager Bilal U. Haq
OCE DIVISION OF OCEAN SCIENCES
GEO DIRECTORATE FOR GEOSCIENCES
Start Date September 1, 2000
Expires August 31, 2003 (Estimated)
Expected Total Amount $252140 (Estimated)
Investigator Timothy L. Grove
Sponsor MIT
77 Massachusetts Avenue
Cambridge, MA 02139
NSF Program 1620 MARINE GEOLOGY AND GEOPHYSICS
Field Application 0204000 Oceanography
Abstract Recommended project is for a study of the volatile flux in the Izu-Bonin-Mariana (IBM) arc system. Water and CO2 analyses will be done using the Fourier Transform Infrared Spectrometry (FTIR) method on glassy inclusions from olivines, laser-ablation, inductively-coupled plasma mass spectrometry (LA-ICPMS) trace element analysis on these same inclusions, and also will do experimental phase equilibrium studies with IBM basalts at pressures ranging from 100-800 megapascals in water saturated and undersaturated conditions. This work is very important for understanding mass balances in arc systems, addressing key unknowns in volatile flux budgets. The samples to be used are already well characterized. The research will address the relative role of decompression versus flux melting for these samples, determine key phase equilibria relationships under hydrous conditions, and develop melt geohygrometers to estimate water contents in IBM lava compositions.