ODP Leg 107 in the Tyrrhenian Sea: Insights into passive margin and back-arc basin evolution

Research Article| July 01, 1988 ODP Leg 107 in the Tyrrhenian Sea: Insights into passive margin and back-arc basin evolution KIM KASTENS; KIM KASTENS 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar JEAN MASCLE; JEAN MASCLE 2Laboratoire de Géodynamique Sous-Marine, Université Pierre et Marie Curie, BP 48, 06230 Ville franche-sur-Mer, France Search for other works by this author on: GSW Google Scholar CHRISTIAN AUROUX; CHRISTIAN AUROUX 3Ocean Drilling Program, Texas A ENRICO BONATTI 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar CHRISTINA BROGLIA; CHRISTINA BROGLIA 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar JAMES CHANNELL; JAMES CHANNELL 4Department of Geology, University of Florida Gainesville, Florida 32611 Search for other works by this author on: GSW Google Scholar PIETRO CURZI; PIETRO CURZI 5Instituto di Geologia Marina, 40127 Bologna, Italy Search for other works by this author on: GSW Google Scholar KAY-CHRISTIAN EMEIS; KAY-CHRISTIAN EMEIS 3Ocean Drilling Program, Texas A GEORGETTE GLAÇON 6Laboratoire de Stratigraphie et de Paleoécologie, Centre Saint-Charles, Université de Provence, France Search for other works by this author on: GSW Google Scholar SHIRO HASEGAWA; SHIRO HASEGAWA 7Institute of Geology, Tohoku University, Aobayama Sendai, 980, Japan Search for other works by this author on: GSW Google Scholar WERNER HIEKE; WERNER HIEKE 8Lehrstuhl für Allgemeing, Angewandie und Ingenieur-Geologie, Technische Universität München, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar GEORGES MASCLE; GEORGES MASCLE 9Institut Dolomieu Université Scientifique et Mé dicale de Grenoble, Grenoble, France Search for other works by this author on: GSW Google Scholar FLOYD McCOY; FLOYD McCOY 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar JUDITH MCKENZIE; JUDITH MCKENZIE 4Department of Geology, University of Florida Gainesville, Florida 32611 Search for other works by this author on: GSW Google Scholar JAMES MENDELSON; JAMES MENDELSON 10Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142 Search for other works by this author on: GSW Google Scholar CARLA MÜLLER; CARLA MÜLLER 11Universität Frankfurt/Main, D-6000 Frankfurt/Main 1, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar JEAN-PIERRE RÉHAULT; JEAN-PIERRE RÉHAULT 2Laboratoire de Géodynamique Sous-Marine, Université Pierre et Marie Curie, BP 48, 06230 Ville franche-sur-Mer, France Search for other works by this author on: GSW Google Scholar ALASTAIR ROBERTSON; ALASTAIR ROBERTSON 12Department of Geology, University of Edinburgh, Edinburgh EH9 3JW, United Kingdom Search for other works by this author on: GSW Google Scholar RENZO SARTORI; RENZO SARTORI 5Instituto di Geologia Marina, 40127 Bologna, Italy Search for other works by this author on: GSW Google Scholar RODOLFO SPROVIERI; RODOLFO SPROVIERI 13Instituto di Geologia Palermo, Italy Search for other works by this author on: GSW Google Scholar MASAYUKI TORII MASAYUKI TORII 14Department of Geology and Mineralogy, Kyoto University, Kyoto, 606, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information KIM KASTENS 1Lamont-Doherty Geological Observatory of Columbia University, Palisades, New York 10964 JEAN MASCLE 2Laboratoire de Géodynamique Sous-Marine, Université Pierre et Marie Curie, BP 48, 06230 Ville franche-sur-Mer, France CHRISTIAN AUROUX 3Ocean Drilling Program, Texas A2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation KIM KASTENS, JEAN MASCLE, CHRISTIAN AUROUX, ENRICO BONATTI, CHRISTINA BROGLIA, JAMES CHANNELL, PIETRO CURZI, KAY-CHRISTIAN EMEIS, GEORGETTE GLAÇON, SHIRO HASEGAWA, WERNER HIEKE, GEORGES MASCLE, FLOYD McCOY, JUDITH MCKENZIE, JAMES MENDELSON, CARLA MÜLLER, JEAN-PIERRE RÉHAULT, ALASTAIR ROBERTSON, RENZO SARTORI, RODOLFO SPROVIERI, MASAYUKI TORII; ODP Leg 107 in the Tyrrhenian Sea: Insights into passive margin and back-arc basin evolution. GSA Bulletin 1988;; 100 (7): 1140–1156. doi: https://doi.org/10.1130/0016-7606(1988)1002.3.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 SocietyGSA Bulletin Search Advanced Search Abstract Leg 107 of the Ocean Drilling Program drilled a west-northwest-east-southeast transect of seven sites across the Tyrrhenian Sea, the youngest of the sub-basins of the Mediterranean Sea. Sites 654, 653, 652, and 656 document the rifting and subsidence of the Sardinia passive continental margin. On the upper margin (Site 654), we cored a classic transgressive sequence: subaerial conglomerates, overlain by oyster-bearing sands, overlain by marine marl. Comparison between the recovered lithologies and seismic reflection profiles suggests that the synrift sediments on the upper margin are Tortonian (late Miocene) to Messinian (latest Miocene) in age, whereas synrift sediments on the lower margin are Messinian to Pliocene in age. During the Messinian desiccation of the Mediterranean, Sites 654 and 653, now on the upper Sardinian margin, apparently occupied a basinal setting, where they received nannoplankton-bearing clays interbedded with laminated gypsum. Sites 656 and 652, now on the lower Sardinia margin, were apparently higher standing during the desiccation event; their Messinian facies are subaerial and lacustrine, respectively. We infer from these lines of evidence that tilting and subsidence occurred more than a million years earlier on the upper margin than on the lower margin. Such diachroneity can be interpreted in terms of migration of the zone of maximum extension above a "rolling-back" subduction zone, or in terms of extension of continental crust, by shear along a deep "detachment fault."Sites 655, 651, and 650 were drilled into two small basalt-floored basins of the central and eastern Tyrrhenian. Emplacement of basaltic crust in the central Tyrrhenian (Vavilov Basin) apparently began more than a million years before, emplacement of basaltic crust in the eastern Tyrrhenian (Marsili Basin). This observation is compatible with previous suggestions that the Tyrrhenian has grown southeastward in response to "rollback" of the down-going slab that currently dips northwestward under the toe of Italy. At the easternmost site, high vesicularity of the basalt and benthic foram assemblages in the oldest sediments imply that the basalt erupted in water shallower than 2,500 m. It has apparently subsequently subsided to its present depth of >4,100 m below sea level nearly three times as fast as normal subsidence of crust formed at a mid-ocean ridge. 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.