The 18O
data for Sites 1003 through 1007 are shown in Figure
5 and Table 1, Table
2, Table 3, Table
4, and Table 5. At all
sites, the
18O
of the pore waters in the upper flushed zone (0 to 30 mbsf) is fairly constant
(1
= 0.05
to 0.08
)
(Fig. 6); sites closer to the
Great Bahama Bank (Sites 1005, 1004, and 1003) are more positive in their
18O
values than sites farther away (Sites 1007 and 1006) (Table
6; Fig. 7). Below the
flushed zone, the
18O
values of the pore waters at all sites increase sharply to more than +2
(Fig. 4, Fig.
8) and exhibit a positive correlation with the concentration of chloride
(Fig. 9). The exception to this
trend occurs at Site 1006, where the
18O
values increase to only around +0.8
before
decreasing again with increasing depth (Table
5; Fig. 5, Fig.
10). The highest
18O
value of +2.89
occurs at Site 1003 at a depth
of 910.14 mbsf. The
D
value was determined in selected samples from Site 1003. Although the replicate
samples were not within the standard deviation of the laboratory standards, the
data indicate a decrease in the
D
of the pore waters in the lower portion of Site 1003 (Fig.
11).