Table 11. Isotopic balance calculation for the earth's crust for hydrogen, carbon, and sulfur
Reservoir
Ocean water
Sedimentary rocks
Igneous and
metamorphic
rocks
Mass in
10 18
t
1.4
1.7
28.6
Calculated mean o-values
Average
hydrogen
con. in % H
2 0
5%8
1 %b
8 Estimated after RONOV and MIGDlSOV (1971).
b
Estimated after WEDEPOHL (1969).
Mean isotopic
8D-value in
%.
o
-50
-70
_Be
Average carbon
conc. in % C
0.003
2.4% carbo C i
0.5% org. C i
0.03 in oxidized
form d
0.02 in reduced
form d
Mean isotopic
o-value in
%0
0
0
-28
-10·
-27"
- 7.5
Average sulfur
conc. in %S
0.1
0.74 8
as sulfate
0.25 8
as sulfide
0.04 8
C
This value is even more uncertain than the other ones, since the amount of pore fluids has been neglected.
d
After HOEFS (1965).
e
After HOEFS (1972).
, Estimated after unpublished results
of SIEWERS.
I
After HOLSER and KAPLAN (1966).
h
After KAPLAN et al. (1963).
i
After RONOV (1968).
Mean
03~
+20
+171
-15 h
2.5'
7.2
t:O
~
::s
~
()
P>
0~
....
o·
::s
CIl
-
-
-