Title: Molybdenum accumulation in Cariaco basin sediment over the past 24 k.y.: A record of water-column anoxia and climate
Abstract: Research Article| June 01, 1999 Molybdenum accumulation in Cariaco basin sediment over the past 24 k.y.: A record of water-column anoxia and climate Walter E. Dean; Walter E. Dean 1U.S. Geological Survey, MS 980, Federal Center, Denver, Colorado 80225, USA Search for other works by this author on: GSW Google Scholar David Z. Piper; David Z. Piper 2U.S. Geological Survey, MS 902, 345 Middlefield Road, Menlo Park, California 94025, USA Search for other works by this author on: GSW Google Scholar Larry C. Peterson Larry C. Peterson 3Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Walter E. Dean 1U.S. Geological Survey, MS 980, Federal Center, Denver, Colorado 80225, USA David Z. Piper 2U.S. Geological Survey, MS 902, 345 Middlefield Road, Menlo Park, California 94025, USA Larry C. Peterson 3Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149, USA Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1999) 27 (6): 507–510. https://doi.org/10.1130/0091-7613(1999)027<0507:MAICBS>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 Walter E. Dean, David Z. Piper, Larry C. Peterson; Molybdenum accumulation in Cariaco basin sediment over the past 24 k.y.: A record of water-column anoxia and climate. Geology 1999;; 27 (6): 507–510. doi: https://doi.org/10.1130/0091-7613(1999)027<0507:MAICBS>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 Molybdenum (Mo) concentrations in a sediment core from the Cariaco basin on the Venezuelan continental shelf can be partitioned between a marine fraction and a terrigenous fraction. The accumulation rate of the marine fraction of Mo increased abruptly 15 000 calendar years ago (15 ka), from <0.5 μgṁcm−2ṁyr−1 to >4 μgṁcm−2ṁyr−1, and then decreased abruptly at 9 ka. The accumulation rate remained high throughout this 6 k.y. period, but exhibited maxima at 15–14 and 12.5 ka, corresponding in time to meltwater pulse IA into the Gulf of Mexico and the onset of the Younger Dryas cold event, respectively. The marine fraction of Mo is interpreted in terms of redox conditions of bottom water, as dictated by both the flux of settling organic matter and bottom-water residence time. Correspondence between geochemical extremes in this core with changes in sea level and global climate demonstrates the high degree to which this ocean-margin basin has responded to the paleoceanographic regime throughout the past 24 k.y. 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.