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2"Pbh AND 7!9Po IN TISSUDS OF SOME ALASKAN RESIDENTS
samples andi cai oou bones are given in Vables
(S8.D.), The data in Table 4 indicate that lichens
3 and 4. respectis ly, Uhe?”’Pbresultshave been
collected prior to 1951 had #!°Pb concentrations
concentrations at the time of collection and the
anaverage of 16 + 12 pCi/g (S.D.). Thus, there
collection. has beon subtracted.
due to nuclear testing activities.
corrected for rclivactive decay to reflect the
210Pb, contribu cl by the 28Ra since the time of
The 29ph level, in 14 Alaskan lichen samples
collected over the last ¢ yr have been report-
ed.792) These varied from 3.44 to 69 pCi/g
dry weight with an average of 13 +8 pCi/g
ranging from 3.41 to 34.5 pCi/g dry weight with
was no apparentincrease in #!0Pb concentration
Further, the
range of values (9.68~39.5 pCi/g) for lichen
samples collected at Anaktuvuk Pass in 1949
bracket the 14.9 pCi/g recently reported from
the same area."
Table 3s. Concentrations ofPb and ?**Ra in Alaskan lichen samples collected before 1951
Sample
Date
Location
collected
210Ph, *pCi/et
2tRa, pCi/gt
1948
17.3 + 0.2
0.050 + 6.011
1948
12,2 + 0,1
0.045 + 0.010
1919
35.0 + 0.2
0.043 -- 0.010
Anaktuvuk Pass
1949
9.68 + 0.12
0.125 + 0.009
Parmetia omphalodes
Anaktuvuk Pass
1949
39.5 4+ 0.2
0.028 +. 0.004
Cetraria deliset
Wainwright
1949
12.2 4+ 0.1
0.034 + 0.011
Cladania subulata
Cape Nome
61 287N, 165°W
1923
7.30 + 0.10
0.122 + 0.008
Cladonia uncialis
Noorvik-on Kobuk River
66° 19°N, 161°O'W
Cape Nome
1923
3.41 + 0.06
1923
6.2 + 0.10
0.032 + 0.006
;
0.031 + 0.006
Cetraria islandica
Point Barrow
7I°19'N, 56°40’ W
Point Barrow
FIPLON, 56°40°W
Anaktuvuk Pass
68° 10°N, 51°5 PW
Getraria richardsonii
Alectoria nitidula
+Cladinia sp.
Sphacropharus globosus
68° 10°N, 5L°S UW
GB°LO'N, SIPS PW
70° 39°N, 160°W
Cladonia cenotea
64°28'N, 165°W
* Activity corrected to date of collection and the ?**Ra contribution subtracted.
t Dry weight (dried at 90°C for 24 hr).
Table 4, Concentrations of *°Pb and ***Ra in caribou bone collected before 1951
Sample
number
Location collected
Date
collected
Age
Bone type
7°Pb( pCi/g)*
**Ra( pCi/g)
OC-01
Longhead Island
8-16
Adult
Metatarsal
15.4 4.0.2
0.2! + 0.01
OC-02
Ellesmere Island
3-35
Adult
Occipital
8.08 + 0.13
0.25 + 0.01
OcC-03
Teslin Dist., Yukon Terr.
GU°2’N, 132°50°W
Netilhng Lake, Baffinijand
66°26°N, 7ISW
Near George R., Quebec
J1-12
Adult
Manible
5.4 + 0.17
0.24 + 0.0!
8-25
Fawn
Ulna
1.51 + 0.08
0.065 + 0.006
9-49
Fawn
Scapula
2.08 + 0.12
0.11 + 0.01
OC-06£
OC-05
77°20'N, 105°W
TBO3N, BOW
53°30'N, 66 12’W
* Activity corrected to date ofcollection and the #*Ra contribution subtracted.
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