Examination of the Role of Boron in the Petrogenesis of     Natural Granite Systems
{'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}
This proposal is for a petrologic and geochemical study of                 the role of boron in the differentiation of granite magmas.                     Recent experiments (Chorlton and Martin, 1978; Pichaant, 19981,                 1987; Maning, 1981) have demonstrated that the addition of boron                and fluorine causes the minimum in the Q-Ab-Or system to move                   toward albite, that the solidus temperature is lowered and that                 the solubility of water in the melt is decreased (Bernard et al.,               1985).  In addition, the fluid/melt partition coefficient for                   boron of about 3 (Pichavant, 1981), suggests that much boron can                be mobilized by a fluid coexisting with a granitic melt.                             The aim of the proposed study is to apply the available                    experimental results toward understanding the differentiation of                boron-rich magmas, using the Harney Peak Granite, South Dakota,                 as an example.                                                                       Using the combination of major and minor element, including                boron, stable isotope, microprobe, fluid inclusion and Sm-Nd                    isotope analysis we will be able to describe the role of boron in               large and small-scale chemical and mineralogic fractionations in                granites.  These include a wide range in Na/K ratios commonly                   observed in boron-rich granites, the generation of pegmatitic                   melts, and tourmalinization.
[{'FirstName': 'Michael', 'LastName': 'Glascock', 'PI_MID_INIT': 'D', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Michael D Glascock', 'EmailAddress': 'glascockm@missouri.edu', 'NSF_ID': '000398201', 'StartDate': '01/01/1989', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Peter', 'LastName': 'Nabelek', 'PI_MID_INIT': 'I', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Peter I Nabelek', 'EmailAddress': 'nabelekp@missouri.edu', 'NSF_ID': '000234733', 'StartDate': '01/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}]
{'Name': 'University of Missouri-Columbia', 'CityName': 'COLUMBIA', 'ZipCode': '652113020', 'PhoneNumber': '5738827560', 'StreetAddress': '121 UNIVERSITY HALL', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Missouri', 'StateCode': 'MO', 'CONGRESSDISTRICT': '04', 'CONGRESS_DISTRICT_ORG': 'MO04', 'ORG_UEI_NUM': 'SZPJL5ZRCLF4', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF MISSOURI SYSTEM', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1572', 'Text': 'Tectonics'}
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