Robinson, Rebecca S. and Meyers, Philip A. (2002): Biogeochemical changes within the Benguela Current upwelling system during the Matuyama diatom maximum; nitrogen isotope evidence from Ocean Drilling Program sites 1082 and 1084
Leg/Site/Hole:
Related Expeditions:
ODP 175
Identifier:
ID:
2003-069537
Type:
georefid
ID:
10.1029/2001PA000659
Type:
doi
Creator:
Name:
Robinson, Rebecca S.
Affiliation:
University of Michigan, Department of Geological Sciences, Ann Arbor, MI, United States
Role:
author
Name:
Meyers, Philip A.
Affiliation:
Role:
author
Identification:
Title:
Biogeochemical changes within the Benguela Current upwelling system during the Matuyama diatom maximum; nitrogen isotope evidence from Ocean Drilling Program sites 1082 and 1084
Year:
2002
Source:
Paleoceanography
Publisher:
American Geophysical Union, Washington, DC, United States
Volume:
17
Issue:
4
Pages:
Abstract:
The Matuyama Diatom Maximum (MDM) is a time of peak opal accumulation from 2.6 to 2.0 Ma within the Benguela Current upwelling system that was initiated by increased influence of Southern Ocean water on the eastern South Atlantic. This study measured opal, total organic carbon (TOC), and CaCO (sub 3) fluxes and C and N stable isotopes in sediments deposited from 2.4 to 1.95 Ma at Sites 1082 and 1084 to explore the biogeochemical dynamics within the Benguela region. The infusion of Southern Ocean water delivered dissolved nutrients and Southern Ocean flora and fauna. The bulk sediment (super 15) N records are taken to reflect changes in the (super 15) N of nitrate in the incoming water, where lower values at 2.4 Ma reflect less nitrate utilization in the Antarctic. (modified journ. abst.)
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:75.0000 West:-180.0000 East:
180.0000 South:-90.0000
Keywords: Stratigraphy; Isotope geochemistry; algae; Atlantic Ocean; Benguela Current; biogenic processes; Cenozoic; diatoms; framework silicates; geochemistry; hydrochemistry; isotope ratios; isotopes; Leg 175; Matuyama Chron; microfossils; N-15/N-14; Neogene; nitrogen; Ocean Drilling Program; ODP Site 1082; ODP Site 1084; opal; organic compounds; paleo-oceanography; paleocirculation; paleocurrents; Plantae; Pliocene; sea water; silica minerals; silicates; South Atlantic; Southern Ocean; stable isotopes; Tertiary; total organic carbon; upper Cenozoic;
.