Metamorphic and Isotopic Studies of Mylonite
{'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}
Mylonites form from rock flour ground up along faults.                  The rocks have received a good deal of study but progress has                   been difficult because of their fine, almost impalpable grain                   size.  There is considerable current interest in mylonites not                  only because they may yield information on earthquake mechanisms                but also because old faults may act as deep conduits for the                    flow of metamorphic and hydrothermal fluids.  The proposed                      research includes:  (1) determination of the sizes of domains                   over which chemical and isotopic equilibrium is achieved in                     mylonites; (2) measurement of reaction progress and chemical                    metasomatism to estimate fluid-rock ratios; and (3) adapting                    Rb-Sr and U-Pb isotopic methods to dating mylonitization.                       These methodologies will be applied to mylonites from the                       Brevard fault zone, Georgia, the Hope Valley sheartone,                         Connecticut, and the Borrega Springs mylonite zone, California.                 The comparison of detailed studies of mylonites from a variety                  of P-T fluid environments should make it possible to isolate                    important factors controlling the development of mylonites.
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{'Name': 'Virginia Polytechnic Institute and State University', 'CityName': 'BLACKSBURG', 'ZipCode': '240603359', 'PhoneNumber': '5402315281', 'StreetAddress': '300 TURNER ST NW', 'StreetAddress2': 'STE 4200', 'CountryName': 'United States', 'StateName': 'Virginia', 'StateCode': 'VA', 'CONGRESSDISTRICT': '09', 'CONGRESS_DISTRICT_ORG': 'VA09', 'ORG_UEI_NUM': 'QDE5UHE5XD16', 'ORG_LGL_BUS_NAME': 'VIRGINIA POLYTECHNIC INSTITUTE & STATE UNIVERSITY', 'ORG_PRNT_UEI_NUM': 'M515A1DKXAN8'}
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{'Code': '1572', 'Text': 'Tectonics'}
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