Ocean stagnation and ventilation defined by δ34S secular trends in pyrite and barite, Selwyn Basin, Yukon

Abstract

Research Article| October 01, 1984 Ocean stagnation and ventilation defined by δ34S secular trends in pyrite and barite, Selwyn Basin, Yukon Wayne D. Goodfellow; Wayne D. Goodfellow 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A OE8 Canada Search for other works by this author on: GSW Google Scholar Ian R. Jonasson Ian R. Jonasson 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A OE8 Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Wayne D. Goodfellow 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A OE8 Canada Ian R. Jonasson 1Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A OE8 Canada Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1984) 12 (10): 583–586. https://doi.org/10.1130/0091-7613(1984)12<583:OSAVDB>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Wayne D. Goodfellow, Ian R. Jonasson; Ocean stagnation and ventilation defined by δ34S secular trends in pyrite and barite, Selwyn Basin, Yukon. Geology 1984;; 12 (10): 583–586. doi: https://doi.org/10.1130/0091-7613(1984)12<583:OSAVDB>2.0.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 Within the epicratonic Selwyn Basin, at least three cycles can be recognized for Paleozoic time when the water column alternated from open and ventilated to closed and stratified conditions. These cycles are recorded by δ34S values in pyrite that exceed those for coeval seawater during periods of stagnation and decrease markedly during periods of greater circulation. The marked increase in δ34S values for pyrite formed in stratified seas is controlled by the high percentage of sulfate bacterially reduced to sulfide, coupled with the removal of isotopically lighter sulfur from a closed system during pyrite sedimentation. The δ34S curve for barite during this time has a shape similar to the mean evaporite curve except that it is displaced positively, particularly in Frasnian time. This pronounced increase in δ34S values for barite of Frasnian age coincides with the mixing of isotopically heavier sulfur, accumulated earlier in a stratified water column, with surface waters during a ventilation event. 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.