Nd-Sr Isotopes and the Tectonic Significance of the Paleo-  zoic Acatlan Complex, Southern Mexico
{'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}
The proposed research is aimed at understanding tectonic                   history of the southern N. American craton and the Caribbean                    region - especially the relations between the Paleozoic (?)                     Acatlan metamorphic complex (related to closure of a Paleozoic                  ocean) and the Grenville age (1Ga) Oaxacan crystalline complex                  (high-grade granulite terrane).  These complexes are analogous to               the Appalachian-Caledonian and Grenville orogenic belts of eastern              N. America except that they have 'reversed polarity' (i.e. Acatlan              is west of Oaxacan, whereas appalachian-Caledonian is east of                   Grenville).  One goal is to determine if these belts actually                   correlate (in which case tectonic reorganization is implied in                  Mexico) or if Acatlan is an accreted Pacific terrane unrelated to               Appalachia.  Emphasis will be on detailed Rb-Sr and Sm-Nd                       geochronology of acatlan, and on its isotopic evolution relative                to the crust below north-central Mexico.
[{'FirstName': 'Joaquin', 'LastName': 'Ruiz', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Joaquin Ruiz', 'EmailAddress': 'jruiz@email.arizona.edu', 'NSF_ID': '000586405', 'StartDate': '08/01/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'P. Jonathan', 'LastName': 'Patchett', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'P. Jonathan Patchett', 'EmailAddress': 'patchett@email.arizona.edu', 'NSF_ID': '000415005', 'StartDate': '08/01/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}]
{'Name': 'University of Arizona', 'CityName': 'TUCSON', 'ZipCode': '85721', 'PhoneNumber': '5206266000', 'StreetAddress': '845 N PARK AVE RM 538', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Arizona', 'StateCode': 'AZ', 'CONGRESSDISTRICT': '07', 'CONGRESS_DISTRICT_ORG': 'AZ07', 'ORG_UEI_NUM': 'ED44Y3W6P7B9', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF ARIZONA', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '157200', 'Text': 'Tectonics'}
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