Linear coupling of carbon and strontium isotopes in Rotliegend Sandstone, North Sea: Evidence for cross-formational fluid flow

Research Article| December 01, 1990 Linear coupling of carbon and strontium isotopes in Rotliegend Sandstone, North Sea: Evidence for cross-formational fluid flow Morgan D. Sullivan; Morgan D. Sullivan 1Department of Geology and Applied Geology, Glasgow University, Glasgow G12 800, Scotland Search for other works by this author on: GSW Google Scholar R. Stuart Haszeldine; R. Stuart Haszeldine 1Department of Geology and Applied Geology, Glasgow University, Glasgow G12 800, Scotland Search for other works by this author on: GSW Google Scholar Anthony E. Fallick Anthony E. Fallick 2Isotope Geology Unit, Scottish Universities Research and Reactor Centre, East Kilbride, Glasgow G75 OQU, Scotland Search for other works by this author on: GSW Google Scholar Author and Article Information Morgan D. Sullivan 1Department of Geology and Applied Geology, Glasgow University, Glasgow G12 800, Scotland R. Stuart Haszeldine 1Department of Geology and Applied Geology, Glasgow University, Glasgow G12 800, Scotland Anthony E. Fallick 2Isotope Geology Unit, Scottish Universities Research and Reactor Centre, East Kilbride, Glasgow G75 OQU, Scotland Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (12): 1215–1218. https://doi.org/10.1130/0091-7613(1990)018<1215:LCOCAS>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 Morgan D. Sullivan, R. Stuart Haszeldine, Anthony E. Fallick; Linear coupling of carbon and strontium isotopes in Rotliegend Sandstone, North Sea: Evidence for cross-formational fluid flow. Geology 1990;; 18 (12): 1215–1218. doi: https://doi.org/10.1130/0091-7613(1990)018<1215:LCOCAS>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 Isotopic analyses of carbon and strontium in diagenetic dolomite and ankerite present in the eolian Lower Permian Rotliegend Sandstone, southern North Sea, show an excellent linear correlation between δ13C and 87Sr/86Sr (r = 0.93), suggesting that the sources of these elements were interlinked. The isotopic data indicate that Late Permian Zechstein seas flooded the basin and displaced the interstitial meteoric Rotliegend pore fluids, producing early dolomite with predominantly marine bicarbonate (δ13C = -15‰) and strontium (87Sr/86Sr = 0.7076) isotopic signatures. The isotopic values of this dolomite form a trend to merge with the diageneticafly later ankerite, which has lower 13C/12C (δ13C = -4‰) and more radiogenic strontium (87Sr/86Sr = 0.7112). The obvious source of low-δ13C carbon was thermal decarboxylation of organic matter in the underlying Upper Carboniferous mudstones. We also suggest that the increasing quantities of radiogenic strontium (87Sr/86 = 0.720) were released when organic acids dissolved silicates (feldspar?) in the same underlying mudstones. The upward movement of fluid or diffusion of ions across formation boundaries, therefore, progressively became the dominant control on carbonate precipitation in the Rotliegend Sandstone. 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.