OCE-09314647 In this project, the P.I.s will carry out a combined field (geochemical) and modelling study on two segments of the slow- intermediate spreading MAR at 31-35S. The P.I.s wish to capitalize on a possible window of opportunity of Ewing being in this part of the Atlantic around the proposed time. They will focus on two along axis geochemical anomalies near 33S: the first is a 206Pb/204Pb spike at segment 4, and the second is high Na8.0/low Fe8.0 anomaly at segment 3. The P.I.s contend that in the latter area they can obtain best constraints on the temporal component of a transform fault effect (TFE). Zero-age and off-axis sampling (to 8 Ma old crust) of these two anomalies will allow them to decipher the extent of mantle geochemical heterogeneities and melting processes. Using such constraints the P.I.s ultimately wish to develop satisfactory models of upper mantle heterogeneities and convection. Michael & Hanan will be co-chiefs. Michael will perform electron probe analysis of glasses at Tulsa and trace elements with Ion Probe (WHOI), DCP (Lamont) or ICP-MS (Cornell). Hanan will be responsible for isotopic work.

Agency
National Science Foundation (NSF)
Institute
Division of Ocean Sciences (OCE)
Application #
9314647
Program Officer
Bilal U. Haq
Project Start
Project End
Budget Start
1996-03-01
Budget End
2000-02-29
Support Year
Fiscal Year
1993
Total Cost
$212,845
Indirect Cost
Name
San Diego State University Foundation
Department
Type
DUNS #
City
San Diego
State
CA
Country
United States
Zip Code
92182