.
5
4
3
2
1
0
0
50
100
150
200
250
S. Indian
E. Pacific
35
45
55
Os (fmol kg
_ 1 )
Depth (km)
E. Pacific (9°N 104°W)
S. Indian (37°S 57°E)
Oxygen ( µmol kg
_ 1 )
0.85
0.95
1.05
1.15
1.25
187 Os / 188 Os
Figure 3 Vertical profiles of Os concentration and
187 Os/
188 Os ratio in sea water from the Indian Ocean and the eastern tropical North Pacific. The Pacific data (Woodhouse et al. 1999
EPSL 173: 223) include analyses of both filtered and unfiltered samples; no systematic difference between the two is apparent. Note that the low Os concentrations in the Pacific profile
coincide with the core of a very strong oxygen minimum zone. Indian Ocean data (Levassuer et al. 1998 Science 282: 272) indicate that Os behaves conservatively.
PLATINUM GROUP ELEMENTS AND THEIR ISOTOPES IN THE OCEAN 33
5
4
3
2
1
0
0
50
100
150
200
250
S. Indian
E. Pacific
35
45
55
Os (fmol kg
_ 1 )
Depth (km)
E. Pacific (9°N 104°W)
S. Indian (37°S 57°E)
Oxygen ( µmol kg
_ 1 )
0.85
0.95
1.05
1.15
1.25
187 Os / 188 Os
Figure 3 Vertical profiles of Os concentration and
187 Os/
188 Os ratio in sea water from the Indian Ocean and the eastern tropical North Pacific. The Pacific data (Woodhouse et al. 1999
EPSL 173: 223) include analyses of both filtered and unfiltered samples; no systematic difference between the two is apparent. Note that the low Os concentrations in the Pacific profile
coincide with the core of a very strong oxygen minimum zone. Indian Ocean data (Levassuer et al. 1998 Science 282: 272) indicate that Os behaves conservatively.
PLATINUM GROUP ELEMENTS AND THEIR ISOTOPES IN THE OCEAN 33