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By Ruediger Stein

This examine of natural carbon accumulation in marine environments starts off with a evaluation of mechanisms controlling natural carbon deposition, targeting effects from expeditions into Baffin Bay and the Labrador Sea, in addition to the ocean of Japan and the northwest coast of Africa. significant gadgets of the research have been the reconstruction of alterations in palaeoceanic variables and the heritage of palaeoclimates in numerous environments. The members additionally constructed extra common types for natural carbon accumulation and in comparison organic-carbon features derived from various analytical ideas so one can succeed in the best-fitting interpretation version.

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Additional resources for Accumulation of organic carbon in marine sediments: results from the Deep Sea Drilling Project Ocean Drilling Program (DSDP ODP)

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Eolian vs. , 1989). PROXIES FOR PALEOCLIMATE IN M A R I N E S E D I M E N T S *** OXYGEN STABLE ISOTOPES *** FLUX RATES, COMPOSITION, AND GRAIN SIZE OF SILIClCLASTIC SEDIMENT FRACTIONS (QUARTZ, FELDSPARS, CLAY MINERALS) *** FLUX RATES OF TERRIGENOUS ORGANIC MATTER *** AMOUNT AND COMPOSITION OF POLLEN AND SPORES *** PRESENCE OF FRESH-WATER DIATOMS Fig. 17: Proxies for paleoclimate in marine sediments. , 1979; Demaison and Moore, 1980), changes in accumulation rates of terrigenous organic carbon are primarily controlled by changes in rates of supply.

1. ~ - 1 1 : .. :l 0. ~o- : . : . . ". . . -. o. . . . :. : ! L. - . ~ . l . i°i i°i°! % ! i i°i t. , ..... o.... . . % :i,:~::~:b::::: ..... - . . . . . 0 40 5. 1. Introduction During ODP-Leg 105, holes were drilled at three sites in Baffin Bay and the Labrador Sea (Fig. 27). , 1987). 72" 88" 50" t4° 68" 64 ° 60" 56° ,52" 48" 44" 40* Fig. 27: Location map of Sites 645, 646, and 647. Black arrows indicate surface-water circulation (according to Tchernia, 1982). BIC = Baffin Island Current; LAC = Labrador Current; EGC = East Greenlandcurrent; WGC = West Greenland Current.

Emphasis was placed on the relationships between organic carbon accumulation and both paleoclimatic and paleoceanic conditions in Baffin Bay and Labrador Sea through late Cenozoic times. 2. Recent and sub-recent environments in Baffin Bay and Labrador Sea Baffin Bay, located between Greenland and Baffm Island (Fig. 27), is connected to the Arctic Ocean in the North by the narrow Nares Strait and to the Atlantic Ocean in the South by the shallow Davis Strait (less than 600m water depth). , 1981).

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