Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2956
AuthorsForsberg, C. F.* 
Florindo, F.* 
Grützner, J.* 
Venuti, A.* 
Solheim, A.* 
TitleSedimentation and aspects of glacial dynamics from physical properties, mineralogy and magnetic properties at ODP Sites 1166 and 1167, Prydz Bay, Antarctica
Issue Date2007
URIhttp://hdl.handle.net/2122/2956
KeywordsNeogene
Prydz Bay
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism 
AbstractTrough mouth fans are formed by aggradation of glacial debris flows from sediment deposited by fast flowing ice streams extending to the shelf edge. We here investigate the two sites, ODP Site 1166 on the shelf and Site 1167 drilled on the Prydz Channel Fan in order to contribute to the understanding of Neogene ice flow patterns in Prydz Bay. The mineralogy, sand content, physical and magnetic properties were analysed. The mineralogy of Neogene strata at Site 1166 can be correlated to nearby ODP Site 742 drilled during Leg 119. Moreover an increase in the shear strength of the sediments (Leg 119 load event 3) is found both at Site 1166 and Site 742. This load event probably indicates that the oldest glacial configuration involved thicker glaciers than the later ones. The results from Site 1167 show that there has been a significant change in the provenance of the sediments during the past 2 million years. The greatest change occurred at about 1.13 Ma and implies a shift in the glacial configuration in Prydz Bay with a greater contribution of material from western parts of the drainage basin during the deposition of Unit II (217 – 435 mbsf) at Site 1167 on the Prydz Channel Fan.
Appears in Collections:Manuscripts

Files in This Item:
File Description SizeFormat 
Forsberg et al_palaeo32.doc149 kBMicrosoft WordView/Open
Show full item record

Page view(s)

69
Last Week
0
Last month
0
checked on Jul 25, 2017

Download(s)

3
checked on Jul 25, 2017

Google ScholarTM

Check