Khim, B. K. and Lee, Y. J. (2005): Abrupt increase of calcium carbonate contents in the Campbell Plateau (SW Pacific Ocean) during the deglaciation

Leg/Site/Hole:
ODP 181
ODP 181 1120
Identifier:
2006-059461
georefid
Creator:
Khim, B. K.
Pusan National University, Department of Marine Science, Pusan, South Korea
author
Lee, Y. J.
Korea Institute of Geoscience and Mineral Resources, South Korea
author
Identification:
Abrupt increase of calcium carbonate contents in the Campbell Plateau (SW Pacific Ocean) during the deglaciation
2005
Geosciences Journal (Seoul)
Hanrimwon Publishing Company for the Geological Society of Korea, Seoul, South Korea
9
4
325-330
A core taken from a mudline of Hole 1120A (ODP Leg 181) located in the Campbell Plateau, Southwest Pacific Ocean documents the deglacial variation of calcium carbonate contents. Stable isotope profiles of planktonic and benthic foraminifera and a radiocarbon AMS dating (11,260 ka) constrain the age of deglaciation. Abrupt increase in the calcium carbonate contents during the deglaciation is a result of complex combination of dissolution, production, and dilution. Dissolution of bottom water plays insignificant role in Site 1120 due to the bathymetric high site above the present lysocline. The reduction in dilution of non-carbonate terrigenous particles is considered as a major reason to show the enhanced calcium carbonate contents during the Holocene. Such chalk-marl cycle of Atlantic-type carbonate variation can be observed in the Southwest Pacific Ocean.
English
Serial
Coverage:Geographic coordinates:
North:-50.0349
West:173.2218East: 173.2218
South:-50.0349
Quaternary geology; Isotope geochemistry; Australasia; C-13/C-12; calcium carbonate; Campbell Plateau; carbon; Cenozoic; chemostratigraphy; concentration; continental margin; cores; deglaciation; Foraminifera; Invertebrata; isotope ratios; isotopes; Leg 181; lithostratigraphy; marine sedimentation; marine sediments; microfossils; New Zealand; O-18/O-16; Ocean Drilling Program; ODP Site 1120; oxygen; Pacific Ocean; paleo-oceanography; paleoenvironment; productivity; Protista; Quaternary; sedimentation; sedimentation rates; sediments; South Pacific; Southwest Pacific; stable isotopes; upper Quaternary; West Pacific;
.