Precambrian zircons from the Florida basement: A Gondwanan connection

Abstract

Research Article| February 01, 1994 Precambrian zircons from the Florida basement: A Gondwanan connection Paul A. Mueller; Paul A. Mueller 1Department of Geology, University of Florida, Gainesville, Florida 32611 Search for other works by this author on: GSW Google Scholar Ann L. Heatherington; Ann L. Heatherington 1Department of Geology, University of Florida, Gainesville, Florida 32611 Search for other works by this author on: GSW Google Scholar Joseph L. Wooden; Joseph L. Wooden 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Robert D. Shuster; Robert D. Shuster 3Department of Geography and Geology, University of Nebraska, Omaha, Nebraska 68182 Search for other works by this author on: GSW Google Scholar Allen P. Nutman; Allen P. Nutman 4Research School of Earth Sciences, Australian National University, Canberra, A.C.T., Australia Search for other works by this author on: GSW Google Scholar Ian S. Williams Ian S. Williams 4Research School of Earth Sciences, Australian National University, Canberra, A.C.T., Australia Search for other works by this author on: GSW Google Scholar Author and Article Information Paul A. Mueller 1Department of Geology, University of Florida, Gainesville, Florida 32611 Ann L. Heatherington 1Department of Geology, University of Florida, Gainesville, Florida 32611 Joseph L. Wooden 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Robert D. Shuster 3Department of Geography and Geology, University of Nebraska, Omaha, Nebraska 68182 Allen P. Nutman 4Research School of Earth Sciences, Australian National University, Canberra, A.C.T., Australia Ian S. Williams 4Research School of Earth Sciences, Australian National University, Canberra, A.C.T., Australia Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1994) 22 (2): 119–122. https://doi.org/10.1130/0091-7613(1994)022<0119:PZFTFB>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Paul A. Mueller, Ann L. Heatherington, Joseph L. Wooden, Robert D. Shuster, Allen P. Nutman, Ian S. Williams; Precambrian zircons from the Florida basement: A Gondwanan connection. Geology 1994;; 22 (2): 119–122. doi: https://doi.org/10.1130/0091-7613(1994)022<0119:PZFTFB>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A Gondwanan origin for the pre-Cretaceous basement of Florida is suggested by U- Pb ages of 515 to 2860 Ma for single zircons separated from subsurface samples of lower Paleozoic sandstone of the Suwannee basin (Alachua County, Florida) and Neoproterozoic Osceola granite (Osceola County, Florida). Forty individual grains analyzed by SHRIMP ion microprobe yielded ages from 515 to 2860 Ma; ages >1000 Ma were predominantly concordant. Two principal populations are evident: (1) 515 to 637 Ma (avg. = 574 Ma; 206Pb/238U ages) and (2) 1967 to 2282 Ma (avg. = 2130 Ma; 207Pb/206Pb ages). Only six zircons were recovered from the granite; four are Pan-African and two are Archean. For the sandstone, the similarity between the Sm-Nd model age (1245 Ma) and the average of the single zircon ages (1326 Ma) suggests that these zircons are chronologically representative of the aggregate provenance of the sandstone. The two dominant zircon age groupings correspond chronologically to the Pan-African and Birimian or Eburnian (Africa) and to the Brasiliano and Trans-Amazonian (South America) orogenic cycles. The presence of detritus from rocks of these two orogenic cycles clearly places the basement of Florida in Gondwanaland proximal to the West African and/or Trans-Amazonian-San Luis cratons in the early Paleozoic, a location it probably shared with other circum-Atlantic exotic terranes (Avalonian, Cadomian, and/or Carolina). This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.