Robinson, Rebecca S.; 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. American Geophysical Union, Washington, DC, United States, Paleoceanography, 17 (4), georefid:2003-069537

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.)
Coverage:
West: -180.0000 East: 180.0000 North: 75.0000 South: -90.0000
West: NaN East: NaN North: NaN South: NaN
West: NaN East: NaN North: NaN South: NaN
Relations:
Expedition: 175
Site: 175-1082
Site: 175-1084
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.1029/2001PA000659 (c.f. for more detailed metadata)
Data download: application/pdf
This metadata in ISO19139 XML format