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Oxygen isotopic evidence for Late Triassic monsoonal upwelling in the northwestern Tethys

2012; Geological Society of America; Volume: 40; Issue: 6 Linguagem: Inglês

10.1130/g32792.1

1943-2682

Manuel Rigo, Julie Trotter, Nereo Preto, Ian S. Williams,

Hydrocarbon exploration and reservoir analysis

Research Article| June 01, 2012 Oxygen isotopic evidence for Late Triassic monsoonal upwelling in the northwestern Tethys M. Rigo; M. Rigo * 1Department of Geosciences, University of Padova, Via Gradenigo 6, 35131 Padua, Italy *E-mail: manuel.rigo@unipd.it. Search for other works by this author on: GSW Google Scholar J.A. Trotter; J.A. Trotter 2School of Earth & Environment, The University of Western Australia, Perth, WA 6009, Australia Search for other works by this author on: GSW Google Scholar N. Preto; N. Preto 1Department of Geosciences, University of Padova, Via Gradenigo 6, 35131 Padua, Italy Search for other works by this author on: GSW Google Scholar I.S. Williams I.S. Williams 3Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information M. Rigo * 1Department of Geosciences, University of Padova, Via Gradenigo 6, 35131 Padua, Italy J.A. Trotter 2School of Earth & Environment, The University of Western Australia, Perth, WA 6009, Australia N. Preto 1Department of Geosciences, University of Padova, Via Gradenigo 6, 35131 Padua, Italy I.S. Williams 3Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia *E-mail: manuel.rigo@unipd.it. Publisher: Geological Society of America Received: 31 Aug 2011 Revision Received: 18 Dec 2011 Accepted: 10 Jan 2012 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (6): 515–518. https://doi.org/10.1130/G32792.1 Article history Received: 31 Aug 2011 Revision Received: 18 Dec 2011 Accepted: 10 Jan 2012 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation M. Rigo, J.A. Trotter, N. Preto, I.S. Williams; Oxygen isotopic evidence for Late Triassic monsoonal upwelling in the northwestern Tethys. Geology 2012;; 40 (6): 515–518. doi: https://doi.org/10.1130/G32792.1 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 The oxygen isotopic composition of conodonts from the Pizzo Mondello section in the Sicani Basin (Sicily, Italy), on the northwestern Tethys margin, has been used to reconstruct regional paleoseawater conditions. The δ18Ophos values (21‰–21.9‰) measured by sensitive high-resolution ion microprobe (SHRIMP II) are consistent with previously published δ18Ophos data from the contemporaneous marginal Hallstatt-Meliata Basin (20.3‰–22.5‰) located farther north, but are distinctly higher than those previously reported from the open ocean setting of the nearby Lagonegro Basin (18.7‰–20.0‰). This ∼2‰ offset represents a temperature differential of ∼8 °C, suggesting that sea-surface temperatures along the northwestern margin (Sicani and Hallstatt-Meliata basins) of the Tethys Ocean were lower than in the open ocean (Lagonegro Basin) during the late Carnian (Tuvalian 2) to early Norian (Lacian). We interpret the cooler waters of the marginal basins to reflect coastal upwelling driven by strong monsoonal systems, as predicted by existing paleoclimate models for this region. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.