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Fig. 4 Multichannel seismic re
ection data (part of the transect C, BGR78002, the red line)
crossing the east and northeast region of the Weddell Sea
fl
3.2 Sedimentation Rates
Twelve points were selected from the three long transects and used to represent the
different locations in Weddell Sea basin (Fig.
5
). Generally, the sediment thickness
shows a trend of decreasing from the continental margin to the abyssal plain of the
Weddell Sea. Most sediment was deposited on the continental shelf and slope, with
large depocentres in front of the Filchner-Ronne Ice Shelf and along the southern
continental rise of the Weddell Sea. The maximum total sediment thickness is up to
8 km (Fig.
5
). Sedimentation rates were deduced by combining age range of each
unit and sediment thickness (Huang and Jokat
2014
). During the pre glacial unit,
the sedimentation rates are changing from 1.9
45.5 m/Myr and the maximum
-
sediment thickness is up to 4.5 km. Points 1
4 selected from transect A have
relative high values in the southern continental rise, the sedimentation rates are
ranging from 21.1
-
4 km. The
sedimentation rates from the central and northern Weddell Sea basin are very low,
it
-
44.5 m/Myr, the sediment thickness is up to 3
-
18.4 m/Myr. The transitional unit yields a higher
sedimentation rates than the pre glacial unit. The values are changing from
25.3
is changing from 1.9
-
78.4 m/Myr with relative thin sediment thickness. Transact A has the highest
sedimentation rates in this unit, which are changing from 57.8 to 78.4 m/Myr with a
sediment thicknesses of 0.9
-
1.4 km. During the full glacial unit, the overall sedi-
mentation rates are very high, particularly it is up to 114.3 m/Myr with 1.3 km thick
sediment at the transect A (Fig.
5
). In the central and northern Weddell Sea basin,
the relative high sedimentation rates are observed as well.
-
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