International Journal of Marine Science, 2017, Vol.7, No.22, 205-213
210
Figure 2 The relationship between P and Al in Sinop Peninsula
of the Black Sea
Figure 3 The relationship between Ca and Al in Sinop
Peninsula of the Black Sea
The absence of any relationship between Al and Ca both in the Inner Harbor and Akliman suggests that calcium is
derived from the sea. The fact that the reproduction of Emiliania huxleyii in Sinop increases in the spring and
summer months (Türkoglu and Koray, 2004) explains this situation. On the other hand, the negative relationship
between Ca and Al in Karakum (Figure 3; data points on the right) can be explained by the effect of dilution of Al
on Ca.
Ca values greater than 20% at the Inner Harbor indicate that Coccolithophores reproduce were higher in the
previous periods. About 15% of Ca values are located 0-4 cm depth of sediment. Al values in both Akliman and
Inner Harbor are almost constant and the independent change of Ca from Al suggests that Ca is marine origin. The
Ca values in Akliman and Karakum are less than 10%. The inverse relationship of high Al values ( > 6%) with Ca
in Karakum suggests that terrestrial-derived Al dilutes the marine-origin Ca in the sediment. The values of Ca and
Al are almost homogenous along the sediment column.
In general, Fe, Ti, Cu, Co and Al values in Karakum are higher than Akliman and Inner Harbor. However, there
are strong positive correlations in all three stations. The values in Akliman are more homogeneous. It is likely that
the north coast of the region is being sediment transported away by strong water movements. This similarity is
also observed with stronger correlations between Fe / Co (R = 0.991), Fe / Al (R = 0.972) and Fe / Ti (R = 0.994).
Whereas, Fe / Hg (R = 0.958) indicated a lower correlation coefficient (Figure 4). Correlation with Al-normalized
is weak. Correlation with organic carbon-normalized is increased by some degree. This is due to the large
sedimentation of erosion material and the transfer of some of the material by organic carbon. The higher values in
Karakum may be attributed wider water catchment basins and the great flood deposits.
Ca and Sr are two welded components and are marine welded. The Ca and Sr ratios vary in relation to climates.
The sediment has a value greater than 21% at 4-10 cm while it is 14-16% at the first 4 cm; this indicates that
presence of predominant Coccolithophores reproduce in the past.
Müller (1969) has classified I
geo
in relation to contamination levels into following classes; class 0, uncontaminated
(I
geo
≤ 0), class 1 from uncontaminated to moderately contaminated (0 < I
geo
< 1), class 1 moderately contaminated
(1 < I
geo
< 2), class 3 from moderately to strongly contaminated (2 < I
geo
< 3), class 4 strongly contaminated (3 <
I
geo
< 4), class 5 from strongly to extremely contaminated (4 < I
geo
< 5) and class 6, extremely contaminated (Igeo >
5). In the present study I
geo
was calculated using geochemical background values for all stations of Sinop
Peninsula (Figure 5, Figure 6 and Figure 7).
