The Geological
Timescale Versus Radiometric Dating
By
Paul Nethercott
October 2014
The Jurassic Period
152 To 208 Million Years Ago
1. Evaluating Re–Os Systematics,
Geochimica et Cosmochimica Acta, Volume 77 (2012) 275–291
|
187Os/188Os |
187Os/188Os |
|
-958,086 |
-521,256 |
|
-801,783 |
-514,545 |
|
-616,183 |
-512,418 |
|
-604,563 |
-504,562 |
|
-600,471 |
-503,089 |
|
-589,996 |
-499,652 |
|
-569,047 |
-498,179 |
|
-553,989 |
-497,360 |
|
-552,680 |
-496,051 |
|
-521,911 |
-427,147 |
2. Petrogenesis of Garnet Two-Mica Granites,
Journal Of Geophysical Research, 1981, Volume 86, Number B11, Pages 10591-10606
|
Method |
Millions Of Years |
|
206Pb/238U |
95 |
|
207Pb/235U |
150 |
|
207Pb/206Pb |
1,448 |
|
208Pb/232Th |
471 |
3. 187Os–186Os systematics of Os–Ir–Ru,
Earth and Planetary Science Letters, Volume 230 (2005), Pages 211– 226
|
187Os/188Os |
187Os/188Os |
|
-637 |
241 |
|
-615 |
247 |
|
-395 |
451 |
|
-314 |
800 |
|
-294 |
1,112 |
|
-293 |
2,721 |
|
-58 |
3,646 |
|
-24 |
|
4. The Stonyford Volcanic Complex,
Journal Of Petrology, 2005, Volume 46, Number 10, Pages 2091–2128
|
207Pb/206Pb |
207Pb/206Pb |
|
4,950 |
4,960 |
|
4,951 |
4,958 |
|
4,956 |
4,927 |
|
4,968 |
4,955 |
|
4,972 |
4,954 |
|
4,965 |
4,831 |
|
4,969 |
5,012 |
5. Constraints on the U-Pb Isotopic Systematics,
Geochimica et Cosmochimica Acta, 2005, Volume 69, Number 24, Pages 5819-5830
|
87Rb/86Sr |
207Pb/206Pb |
206Pb/238U |
206Pb/238U |
|
6,186 |
5,204 |
6,566 |
6,574 |
|
4,567 |
5,200 |
5,538 |
5,479 |
|
4,247 |
5,195 |
3,868 |
3,864 |
|
4,219 |
5,184 |
3,257 |
3,250 |
|
4,122 |
5,166 |
3,252 |
3,249 |
|
4,095 |
5,120 |
3,246 |
3,247 |
|
4,071 |
5,103 |
2,951 |
2,950 |
|
|
5,094 |
2,510 |
2,512 |
|
|
5,029 |
2,286 |
2,268 |
|
|
5,021 |
2,156 |
2,156 |
|
|
5,013 |
1,563 |
1,559 |
|
|
4,981 |
1,313 |
1,309 |
|
|
4,973 |
838 |
830 |
|
|
4,970 |
218 |
218 |
6. Siderophile Element Abundance,
Geochimica et Cosmochimica Acta, Volume 76 (2012) Pages 206–235
|
187Os/188Os |
187Os/188Os |
187Os/188Os |
187Os/188Os |
187Os/188Os |
147Sm/144Nd |
147Sm/144Nd |
|
-100,773 |
-4,299 |
-2,107 |
-796 |
-368 |
586 |
172 |
|
-36,378 |
-3,803 |
-2,086 |
-752 |
-304 |
474 |
170 |
|
-19,829 |
-3,749 |
-1,970 |
-716 |
-297 |
472 |
166 |
|
-13,901 |
-3,592 |
-1,719 |
-693 |
-191 |
445 |
166 |
|
-12,040 |
-3,359 |
-1,178 |
-641 |
-114 |
347 |
164 |
|
-11,711 |
-2,890 |
-1,080 |
-608 |
35 |
185 |
150 |
|
-8,675 |
-2,649 |
-1,027 |
-593 |
1,359 |
185 |
12 |
|
-6,526 |
-2,376 |
-901 |
-564 |
1,416 |
181 |
|
|
-6,215 |
-2,361 |
-816 |
-494 |
2,758 |
174 |
|
|
-4,991 |
-2,217 |
-810 |
-422 |
|
173 |
|
7. Potassium-Argon Age Study,
Journal Of Geophysical Research, 1964, Volume 69, Number 22, Page 4897
|
K/Ar |
|
121 |
|
167 |
|
167 |
|
168 |
|
171 |
|
194 |
|
586 |
|
671 |
|
721 |
|
911 |
8. Geochemistry of Jurassic Oceanic Crust,
Journal Of Petrology, 1998, Volume 39, Number 5, Pages 859-880
|
207Pb/206Pb |
87Rb/86Sr |
|
4,963 |
9,487 |
|
4,974 |
31,106 |
|
4,971 |
37,689 |
|
4,975 |
-146,639 |
|
4,972 |
51,967 |
|
4,972 |
-124,982 |
|
4,971 |
-131,103 |
|
5,024 |
-250,782 |
|
5,005 |
-113,588 |
|
5,001 |
-299,289 |
|
4,999 |
-299,310 |
|
4,938 |
-250,550 |
|
4,845 |
-299,346 |
|
5,017 |
-130,609 |
|
4,956 |
-173,153 |
|
4,988 |
-299,241 |
|
4,991 |
-152,946 |
9. Isotopic (Sr, Nd, Pb, and Os) Composition,
Chemical Geology, Volume 277, 2010, Pages 227-244
|
87Rb/86Sr |
147Sm/144Nd |
187Re/188Os |
206Pb/238U |
208Pb/232Th |
207Pb/206Pb |
|
180 |
181 |
181 |
12,169 |
30,279 |
5,085 |
|
180 |
181 |
180 |
11,513 |
28,507 |
5,080 |
|
180 |
180 |
180 |
9,990 |
22,938 |
5,079 |
|
180 |
180 |
180 |
9,642 |
21,966 |
5,044 |
|
180 |
180 |
180 |
8,199 |
20,002 |
5,044 |
|
180 |
180 |
180 |
8,039 |
19,637 |
5,039 |
|
180 |
180 |
180 |
7,968 |
18,624 |
5,027 |
|
180 |
180 |
180 |
7,321 |
17,207 |
5,017 |
|
180 |
180 |
180 |
6,541 |
16,108 |
5,017 |
|
180 |
180 |
180 |
6,388 |
15,412 |
5,017 |
|
180 |
180 |
180 |
5,866 |
11,755 |
5,015 |
|
180 |
180 |
180 |
5,717 |
11,343 |
5,010 |
|
180 |
180 |
179 |
5,434 |
10,203 |
5,008 |
10. Sr-Nd-Pb Isotope Studies,
Contribution Mineral Petrology, 2002, Volume 144, Pages 241-253
|
207Pb/206Pb |
207Pb/235U |
206Pb/238U |
207Pb/235U |
Pb206/U238 |
Pb208/232Th |
|
5,112 |
4,517 |
3,306 |
2,515 |
297 |
165,469 |
|
4,936 |
4,284 |
3,138 |
1,326 |
257 |
150,399 |
|
4,878 |
3,419 |
1,444 |
436 |
218 |
143,322 |
|
4,570 |
2,650 |
879 |
288 |
211 |
137,057 |
|
4,045 |
1,969 |
606 |
272 |
206 |
127,166 |
|
3,982 |
1,880 |
573 |
161 |
204 |
102,437 |
|
3,909 |
1,567 |
417 |
|
200 |
82,898 |
|
3,729 |
1,187 |
338 |
|
183 |
74,124 |
|
3,340 |
1,132 |
292 |
|
|
47,131 |
|
3,277 |
1,009 |
287 |
|
|
43,247 |
|
2,689 |
681 |
238 |
|
|
40,297 |
11. The Petrogenesis of Martian Meteorites,
Geochimica et Cosmochimica Acta, 2002, Volume 66, Number 11, Pages 2037-2053
|
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
|
74 |
179 |
189 |
207 |
540 |
|
110 |
179 |
189 |
208 |
556 |
|
128 |
179 |
191 |
244 |
574 |
|
162 |
180 |
192 |
263 |
697 |
|
169 |
180 |
195 |
272 |
730 |
|
170 |
181 |
196 |
417 |
875 |
|
170 |
185 |
198 |
420 |
1,039 |
|
176 |
186 |
198 |
436 |
1,124 |
|
177 |
187 |
198 |
455 |
1,129 |
|
177 |
187 |
199 |
482 |
1,793 |
|
178 |
189 |
201 |
482 |
3,233 |
12. Isotope Anomaly In The Indian Ocean Mantle,
Geochemistry, Geophysics And Geosystems, 2005, Volume 6, Number 11
|
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
|
6,454 |
5,059 |
5,035 |
5,025 |
5,013 |
|
6,442 |
5,056 |
5,035 |
5,024 |
5,012 |
|
5,129 |
5,056 |
5,032 |
5,024 |
5,012 |
|
5,129 |
5,051 |
5,032 |
5,023 |
5,012 |
|
5,088 |
5,051 |
5,032 |
5,023 |
5,011 |
|
5,085 |
5,051 |
5,031 |
5,023 |
5,011 |
|
5,083 |
5,045 |
5,031 |
5,023 |
5,010 |
|
5,079 |
5,045 |
5,031 |
5,021 |
5,008 |
|
5,079 |
5,045 |
5,031 |
5,021 |
5,008 |
|
5,067 |
5,040 |
5,031 |
5,019 |
5,008 |
|
5,065 |
5,040 |
5,031 |
5,018 |
5,005 |
|
5,065 |
5,040 |
5,031 |
5,018 |
5,001 |
|
5,065 |
5,039 |
5,031 |
5,015 |
5,000 |
|
5,065 |
5,038 |
5,029 |
5,015 |
4,999 |
|
5,065 |
5,038 |
5,029 |
5,015 |
4,997 |
|
5,063 |
5,037 |
5,028 |
5,015 |
4,997 |
|
5,063 |
5,037 |
5,026 |
5,014 |
4,997 |
|
5,063 |
5,036 |
5,025 |
5,014 |
4,997 |
|
5,062 |
5,036 |
5,025 |
5,014 |
4,996 |
|
5,061 |
5,036 |
5,025 |
5,013 |
4,995 |
13. The Hawaiian Plume,
Nature Volume 476, Pages 434–437,
www.nature.com/nature/journal/v476/n7361/extref/nature10321-s2.xls
|
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
|
5,046 |
5,016 |
5,000 |
4,983 |
|
5,041 |
5,015 |
4,998 |
4,981 |
|
5,034 |
5,013 |
4,996 |
4,979 |
|
5,033 |
5,011 |
4,994 |
4,978 |
|
5,031 |
5,010 |
4,994 |
4,976 |
|
5,026 |
5,008 |
4,993 |
4,974 |
|
5,025 |
5,006 |
4,991 |
4,972 |
|
5,023 |
5,005 |
4,989 |
4,969 |
|
5,021 |
5,003 |
4,988 |
4,962 |
|
5,020 |
5,001 |
4,986 |
4,960 |
|
5,018 |
5,000 |
4,984 |
4,950 |
14. 40Ar/39Ar Dating And Geochemistry,
Earth and Planetary Science Letters, 1991, Volume 104, Pages 455 - 472
|
Sample |
Maximum Age |
Minimum Age |
Difference |
Percentage |
|
A |
250 |
125 |
126 |
101 |
|
B |
201 |
133 |
68 |
51 |
|
C |
194 |
79 |
115 |
146 |
|
D |
190 |
117 |
73 |
62 |
|
E |
195 |
56 |
139 |
248 |
|
F |
198 |
126 |
72 |
57 |
|
G |
235 |
78 |
157 |
202 |
|
H |
321 |
107 |
214 |
201 |
|
I |
198 |
131 |
68 |
52 |
|
J |
373 |
108 |
265 |
246 |
|
K |
205 |
178 |
27 |
15 |
|
L |
204 |
165 |
39 |
24 |
|
M |
3,471 |
171 |
3,300 |
1,933 |
|
N |
199 |
54 |
146 |
273 |
|
O |
192 |
8 |
184 |
2,333 |
|
P |
209 |
177 |
32 |
18 |
|
Q |
220 |
65 |
155 |
239 |
|
R |
365 |
201 |
164 |
82 |
|
S |
237 |
198 |
39 |
19 |
|
T |
389 |
53 |
335 |
632 |
References
1. Evaluating Re–Os systematics, Geochimica et Cosmochimica Acta, Volume 77 (2012) Pages 275–291
2. Petrogenesis of Garnet Two-Mica Granites, Journal Of Geophysical Research, 1981, Volume 86, Number B11, Pages 10591-10606
3. 187Os–186Os systematics of Os–Ir–Ru, Earth and Planetary Science Letters, Volume 230 (2005), Pages 211– 226
4. The Stonyford Volcanic Complex, Journal Of Petrology, 2005, Volume 46, Number 10, Pages 2091–2128
5. Constraints on the U-Pb isotopic systematics, Geochimica et Cosmochimica Acta, 2005, Volume 69, Number 24, Pages 5819-5830
6. Siderophile element abundance, Geochimica et Cosmochimica Acta, Volume 76 (2012) Pages 206–235
7. Potassium-Argon Age Study, Journal Of Geophysical Research, 1964, Volume 69, Number 22, Page 4897
8. Geochemistry of Jurassic Oceanic Crust, Journal Of Petrology, 1998, Volume 39, Number 5, Pages 859-880
9. Isotopic (Sr, Nd, Pb, and Os) Composition, Chemical Geology, Volume 277, 2010, Pages 227-244
10. Sr-Nd-Pb Isotope Studies, Contribution Mineral Petrology, 2002, Volume 144, Pages 241-253
11. The Petrogenesis of Martian Meteorites, Geochimica et Cosmochimica Acta, 2002, Volume 66, Number 11,
Pages 2037-2053
12. Isotope Anomaly In The Indian Ocean Mantle, Geochemistry, Geophysics And Geosystems, 2005, Volume 6, Number 11
13. The Hawaiian Plume, Nature Volume 476, Pages 434–437, www.nature.com/nature/journal/v476/n7361/extref/nature10321-s2.xls
14. 40ar/39ar Dating And Geochemistry, Earth and Planetary Science Letters, 1991, Volume 104, Pages 455 - 472