RESULTS

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).