The principal investigator, in collaboration with Dr. Melinda Dyar of the University of Oregon, will study the crystal chemistry of coexisting biotite, muscovite, and chlorite from several different representative rock provenances. Electron microprobe, Mossbauer, and other analytical techniques will be utilized. The work will lead to a better understanding of the location of vacancies in the structures of these minerals. It also will lead to a better understanding of the chemical substitutions that occur in the minerals and of the controls on the partitioning of ferric iron and hydrogen among crystallographic sites in the minerals, as well as between mineral pairs. These data will be of importance to geologists who use these minerals to estimate the geologic conditions of formation of rocks in which the minerals occur.

Agency
National Science Foundation (NSF)
Institute
Division of Earth Sciences (EAR)
Type
Standard Grant (Standard)
Application #
9117703
Program Officer
Maryellen Cameron
Project Start
Project End
Budget Start
1992-01-01
Budget End
1994-12-31
Support Year
Fiscal Year
1991
Total Cost
$28,090
Indirect Cost
Name
University of Maine
Department
Type
DUNS #
City
Orono
State
ME
Country
United States
Zip Code
04469