Sediment composition of periplatform sediments and calciturbidites around Pedro Bank, Southwestern Caribbean Sea [Elektronische Ressource] = Sedimentzusammensetzung von Periplatformsedimenten und Kalkturbiditen im Bereich der Pedro Bank, südwestliches Karibisches Meer / vorgelegt von Nis Andresen

SEDIMENT COMPOSITION OF PERIPLATFORM SEDIMENTS ANDCALCITURBIDITES AROUND PEDRO BANK,SOUTHWESTERN CARIBBEAN SEASEDIMENTZUSAMMENSETZUNG VON PERIPLATFORMSEDIMENTEN UNDKALKTURBIDITEN IM BEREICH DER PEDRO BANK,SÜDWESTLICHES KARIBISCHES MEERDissertationzur Erlangung des Doktorgradesder Mathematisch-Naturwissenschaftlichen Fakultätder Christian-Albrechts-Universitätzu Kiel, Deutschlandvorgelegt vonNils AndresenKiel 2000Referent/ in: Prof. Dr. W.-Chr. DulloKorreferent/ in: Prof. Dr. Chr. BetzlerTag der mündlichen Prüfung: 15. November 2000Zum Druck genehmigt: Kiel, den 15. November 2000Der Dekan gez. Prof. Dr. Thomas BaueriiABSTRACTSpatial and temporal variations in the carbonate production and sediment export of the Pedro Bankcarbonate platform were studied in response to the late Quaternary sea level fluctuations. A set of ninesediment cores were obtained from up- and downcurrent position to Pedro Bank to form a downcurrentoffbank transect that covers the proximal toe-of-slope to a distal basinal setting. The sediments studiedwere deposited between 650 to 2520 meter below recent sea level, and reach back until oxygen isotopestage 9, i.e. until approximately 300-310 ky. The sediments recovered are rather uniform, and consistof foraminifer- and pteropod-bearing aragonite-rich mud- to wackstones. This typical periplatformlithology incorporates calciturbidites, which are of pelagic as well as neritic origin.