Lack of evidence for enhanced preservation of sedimentary organic matter in the oxygen minimum of the Gulf of California

Research Article| August 01, 1992 Lack of evidence for enhanced preservation of sedimentary organic matter in the oxygen minimum of the Gulf of California S. E. Calvert; S. E. Calvert 1Department of Oceanography, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar R. M. Bustin; R. M. Bustin 2Department of Geological Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar T. F. Pedersen T. F. Pedersen 1Department of Oceanography, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information S. E. Calvert 1Department of Oceanography, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada R. M. Bustin 2Department of Geological Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada T. F. Pedersen 1Department of Oceanography, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1992) 20 (8): 757–760. https://doi.org/10.1130/0091-7613(1992)020<0757:LOEFEP>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 S. E. Calvert, R. M. Bustin, T. F. Pedersen; Lack of evidence for enhanced preservation of sedimentary organic matter in the oxygen minimum of the Gulf of California. Geology 1992;; 20 (8): 757–760. doi: https://doi.org/10.1130/0091-7613(1992)020<0757:LOEFEP>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 test of the hypothesis that hydrogen-rich organic matter accumulates preferentially in sediments under oxygen minima has been carried out by examining the composition of laminated and homogeneous diatomaceous sediments of the Guaymas Basin in the Gulf of California. The laminated sediments occur where an intense oxygen minimum intersects the slope around the margins of the basin. Above and below the depth of the oxygen minimum, the sediments are homogenized by a burrowing infauna. The two sediment types have very similar bulk chemical and mineral compositions, and the organic matter is overwhelmingly marine. The total organic carbon contents and Rock-Eval parameters (hydrogen and oxygen indices) of the two sediment types are not significantly different. Whereas a road organic carbon maximum in the homogeneous sediments is centered at roughly 1200 m depth on the slope of the basin, this maximum lies deeper than the core of the oxygen minimum. Thus, both the concentration and the nature of the organic matter in the sediments of this highly productive marginal marine basin are not related to the concentration of dissolved oxygen in the bottom waters. 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.