Sorrell, Jennifer and Judge, Shelley (2008): Ice-rafted debris in the North Atlantic during the Pleistocene (-1.4-1.7 ma); Integrated Ocean Drilling Program (IODP) Expedition 306, Site U1314
Leg/Site/Hole:
Related Expeditions:
IODP 306 IODP 306 U1314
Identifier:
ID:
2009-012855
Type:
georefid
Creator:
Name:
Sorrell, Jennifer
Affiliation:
Muskingum College, Department of Geology, New Concord, OH, United States
Role:
author
Name:
Judge, Shelley
Affiliation:
Role:
author
Identification:
Title:
Ice-rafted debris in the North Atlantic during the Pleistocene (-1.4-1.7 ma); Integrated Ocean Drilling Program (IODP) Expedition 306, Site U1314
Year:
2008
Source:
In: Anonymous, Geological Society of America, North-Central Section, 42nd annual meeting
Publisher:
Geological Society of America (GSA), Boulder, CO, United States
Volume:
40
Issue:
5
Pages:
26
Abstract:
During IODP Expedition 306 cores of sediment were obtained for the purpose constructing the paleoceanographic history and climatic variance in the North Atlantic. Sediment for this research came from Site U1314, which is located southeast of Greenland and south of Iceland on the southern part of the Gardar Drift. Site U1314 is just north of the classic IRD (Ice-Rafted Debris) belt. Samples used in this study were obtained from the IODP Bremen Core Repository. Approximately 10 cc of sediment was collected for each sample at a resolution of one sample every 1500-2000 years. The focus of the research was to collect and analyze all coarse-grained sediment. To obtain this particular size sediment the samples were weighed, dried, wet sieved at 150mu m and 2mm, dried and weighed once more. The >150 im size-fraction defines IRD for this study. Careful examination of the samples under a binocular microscope shows that the IRD is composed of quartz (including rose quartz), basalt, felsic igneous, obsidian, sandstone, and schist. These compositional variations for the IRD allow provenance to be determined. Mass accumulation rates (MARs) were calculated for the IRD in order to more accurately quantify the IRD input when compared with the biogenic (dominantly foraminifera) input. From the IRD data, in addition to shipboard lightness and magnetic susceptibility data, climate patterns (i.e., glacial pulses), and thus the paleoclimate history near the Gardar Drift is determined for the interval 1.4-1.7 Ma.
Language:
English
Genre:
Rights:
URL:
Coverage: Geographic coordinates: North:56.2200 West:-27.5300 East:
-27.5300 South:56.2200
Keywords: Quaternary geology; Atlantic Ocean; Cenozoic; coarse-grained materials; cores; debris; Expedition 306; ice rafting; Integrated Ocean Drilling Program; IODP Site 1314; marine sediments; North Atlantic; Northeast Atlantic; Pleistocene; provenance; Quaternary; sediments;
.