ROW:  Crystal Chemistry and Petrogenesis of Biotites from   Pelitic Schists
{'Code': '06030103', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Jane M. Ernst', 'PO_EMAI': None, 'PO_PHON': None}
Crystallographic studies have long made use of                          spectroscopic techniques such as electron microprobe, x-ray                     fluorescence, Mossbauer, and Fourier transform infrared spectro-                scopy, but these methods have rarely been applied together in a                 complementary fashion to petrologic problems.  Proposed work                    seeks to further develop and utilize the capabilities of these                  methods to study biotites within a petrologic framework.  Major                 and minor elements, Fe 3+, Fe 2+, OH, and octahedral ordering                   will be examined in two suites of biotites and coexisting                       minerals from western Maine and northern Idaho.  Spectroscopic                  data will be used to study the cation site occupancies and                      resultant crystal structures of biotites, as well as the                        influence of mineral assemblage on biotite composition.  Results                will be used to evaluate the effects of Fe 3+ and octahedral                    ordering in minerals on activity models and geothermometers.                    Most importantly, a new unified substitution model will be                      sought in order to explain the compositional variation of                       biotite as a function of metamorphic reactions and mineral                      assemblage.
{'FirstName': 'Melinda', 'LastName': 'Dyar', 'PI_MID_INIT': 'D', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Melinda D Dyar', 'EmailAddress': 'mdyar@psi.edu', 'NSF_ID': '000291609', 'StartDate': '07/15/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of Oregon Eugene', 'CityName': 'EUGENE', 'ZipCode': '974031905', 'PhoneNumber': '5413465131', 'StreetAddress': '1776 E 13TH AVE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Oregon', 'StateCode': 'OR', 'CONGRESSDISTRICT': '04', 'CONGRESS_DISTRICT_ORG': 'OR04', 'ORG_UEI_NUM': 'Z3FGN9MF92U2', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF OREGON', 'ORG_PRNT_UEI_NUM': 'Z3FGN9MF92U2'}
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[{'Code': '157200', 'Text': 'Tectonics'}, {'Code': '912000', 'Text': 'CROSS-DIRECTORATE PROGRAMS'}]
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