Latest Miocene‐Pleistocene Productivity and Deep‐Sea Ventilation in the Northwestern Indian Ocean (Deep Sea Drilling Project Site 219)
- 1 February 1999
- journal article
- Published by American Geophysical Union (AGU) in Paleoceanography and Paleoclimatology
- Vol. 14 (1) , 62-73
- https://doi.org/10.1029/1998pa900006
Abstract
Knowledge of the biology of deep‐sea benthic foraminifera was used to interpret the results of multivariate analyses (factor and cluster) on relative abundance data of benthic foraminifera at Deep Sea Drilling Project Site 219 (southeastern Arabian Sea; 1764 m depth) in combination with carbon and oxygen isotope data. Faunal data document major changes in deep‐sea ventilation and productivity over the past 5.5 Ma, including the end of the Miocene‐Pliocene Indo‐Pacific “biogenic bloom” period at ∼4.0 Ma. Interestingly, there is no simple correlation between high productivity and low oxygenation. Productivity fluctuated but became overall more pulsed, whereas overall oxygenation increased. We interpret the records as a combination of local to regional fluctuations in productivity probably caused by changes in monsoonal development, particularly its seasonality, and changes in oxygenation of intermediate depth waters in the Indian Ocean caused by global changes in climate and ocean circulation.This publication has 75 references indexed in Scilit:
- Benthic foraminifera in oxygen-poor habitatsPublished by Elsevier ,2003
- Uvigerina proboscidea abundances and paleoceanography of the northern Indian Ocean DSDP Site 214 during the Late NeogenePublished by Elsevier ,2003
- Recent benthic foraminifera from the continental margin of northwest Africa: Community structure and distributionPublished by Elsevier ,2003
- A benthic foraminiferal proxy of pulsed organic matter paleofluxesPublished by Elsevier ,2003
- Deep-sea benthic foraminiferal species which exploit phytodetritus: Characteristic features and controls on distributionPublished by Elsevier ,2003
- Benthic foraminiferal response to the emergence of the Isthmus of Panama and coincident paleoceanographic changesMarine Micropaleontology, 1996
- Response of deep-sea benthic foraminifera to Late Quaternary climate changes, southeast Indian Ocean, offshore Western AustraliaMarine Micropaleontology, 1994
- Glacial to Holocene? 13C variations in intermediate depth water masses of North Indian OceanGeo-Marine Letters, 1994
- Recent deep-sea benthic foraminiferal distributions in the South China and Sulu SeasMarine Micropaleontology, 1993
- Miocene benthic foraminiferal isotope records: A synthesisMarine Micropaleontology, 1981