9316183 Sherrell PIs have found iridium (Ir) anomalies in ice cores associated with the 1908 Tunguska event and the 1783 Laki eruption. In collabooration with Robert Rocchia (Paris), they will extend these analyses to other ice cores with the following goals: 1) test and verify findings, 2) make systematic studies on ice core samples to clarify partitioning of Ir, and 3) investigate temporal variability of background Ir deposition. Results have implications for debate over impact vs. volcanic sources for iridium in the stratigraphic record, and also for linking volcanism and impacts to climatic changes.

Agency
National Science Foundation (NSF)
Institute
Division of Earth Sciences (EAR)
Application #
9316183
Program Officer
H. Richard Lane
Project Start
Project End
Budget Start
1994-08-15
Budget End
1998-07-31
Support Year
Fiscal Year
1993
Total Cost
$85,000
Indirect Cost
Name
Rutgers University
Department
Type
DUNS #
City
New Brunswick
State
NJ
Country
United States
Zip Code
08901