The Geological
Timescale Versus Radiometric Dating
By
Paul Nethercott
October 2014
The Cambrian Period
489.5 To 541 Million Years Ago
1. Sr-Nd-Pb Isotope Systematics Of Mantle Xenoliths,
Geochimica et Cosmochimica Acta, 2001, Volume 65, Number 22, Pages 4243-4255
|
206Pb/238U |
207Pb/206Pb |
87Rb/86Sr |
147Sm/144Nd |
|
9,644 |
5,092 |
2,523 |
101 |
|
8,218 |
5,001 |
2,522 |
101 |
|
7,359 |
4,996 |
231 |
101 |
|
6,417 |
4,992 |
229 |
101 |
|
6,280 |
4,989 |
223 |
101 |
|
5,273 |
4,987 |
206 |
101 |
|
5,231 |
4,986 |
131 |
101 |
|
5,213 |
4,985 |
114 |
101 |
|
5,033 |
4,980 |
112 |
101 |
|
4,950 |
4,979 |
107 |
101 |
|
4,744 |
4,978 |
107 |
101 |
|
4,706 |
4,978 |
107 |
100 |
|
4,483 |
4,978 |
107 |
100 |
|
4,210 |
4,975 |
103 |
100 |
|
4,164 |
4,975 |
101 |
100 |
|
4,026 |
4,973 |
101 |
100 |
|
3,958 |
4,972 |
99 |
100 |
|
3,870 |
4,971 |
99 |
100 |
|
3,280 |
4,971 |
97 |
100 |
|
3,241 |
4,969 |
96 |
100 |
|
3,053 |
4,968 |
94 |
100 |
|
2,706 |
4,966 |
93 |
100 |
|
2,582 |
4,953 |
93 |
100 |
|
2,574 |
4,950 |
93 |
100 |
|
2,155 |
4,942 |
92 |
100 |
|
1,807 |
4,939 |
89 |
100 |
|
1,425 |
4,933 |
89 |
100 |
|
1,173 |
4,904 |
89 |
100 |
2. Northern Canadian Cordillera,
Geochimica et Cosmochimica Acta, 2000, Volume 64, Number 17, Pages 3061-3071
|
187Re/188Os |
187Re/188Os |
187Os/188Os |
|
|
80 |
-464 |
|
-1 |
460 |
27 |
|
|
-1 |
-791 |
|
|
500 |
27 |
|
-1 |
430 |
27 |
|
-1 |
100 |
-464 |
|
-1 |
520 |
27 |
|
320 |
-1 |
-955 |
|
-1 |
480 |
27 |
|
|
1110 |
845 |
|
-1 |
220 |
-300 |
|
|
520 |
27 |
|
550 |
350 |
-137 |
|
2400 |
250 |
-300 |
|
4500 |
630 |
191 |
|
-1 |
920 |
518 |
|
-1 |
-1 |
-628 |
|
540 |
-1 |
-1,937 |
|
680 |
640 |
191 |
|
610 |
510 |
27 |
|
-1 |
330 |
-137 |
|
840 |
750 |
354 |
|
-1 |
-1 |
-791 |
3. The Age of Lithospheric Mantle,
Chemical Geology, Volume 196 (2003), Pages 107– 129
|
187Os/188Os |
187Re/188Os |
187Re/188Os |
|
-178 |
110 |
12,330 |
|
-268 |
30 |
1,720 |
|
1,151 |
1,310 |
2,030 |
|
-11 |
260 |
200 |
|
431 |
660 |
1,120 |
|
-610 |
280 |
4,520 |
|
641 |
850 |
2,620 |
|
1,050 |
1,220 |
1,850 |
|
272 |
520 |
2,790 |
|
282 |
530 |
610 |
|
492 |
720 |
1,140 |
|
-317 |
10 |
190 |
|
91 |
360 |
360 |
|
400 |
640 |
720 |
|
76 |
340 |
15,410 |
|
1,174 |
1,330 |
2,740 |
|
-282 |
20 |
150 |
|
-73 |
210 |
350 |
|
983 |
1,160 |
1,240 |
|
-73 |
210 |
300 |
|
-263 |
30 |
50 |
|
145 |
400 |
430 |
|
112 |
380 |
490 |
|
827 |
1,020 |
1,140 |
|
-611 |
280 |
430 |
|
1,048 |
1,220 |
1,420 |
|
503 |
730 |
1,340 |
|
1,074 |
1,240 |
1,360 |
|
371 |
610 |
3,000 |
4. The Isotope and Trace Element Budget,
Journal Of Petrology, 2000, Volume 41, Number 6, Pages 759-788
|
207Pb/206Pb |
206Pb/238U |
87Rb/86Sr |
|
4973 |
19,679 |
500 |
|
4932 |
15,150 |
500 |
|
4986 |
20,922 |
498 |
|
4985 |
21,761 |
501 |
|
4974 |
18,203 |
500 |
|
|
|
500 |
|
|
|
501 |
|
|
|
499 |
|
|
|
501 |
|
|
|
495 |
5. Cu-Pb-Zn-Ag Mineralization,
Mineral Deposita, 2010, Volume 45, Pages 393-410
|
208Pb/232Th |
208Pb/232Th |
207Pb/206Pb |
207Pb/206Pb |
206Pb/238U |
207Pb/235U |
|
199,319 |
49,691 |
6,275 |
4,986 |
48,496 |
12,150 |
|
171,568 |
45,445 |
5,043 |
4,985 |
37,795 |
10,751 |
|
169,191 |
35,437 |
5,040 |
4,984 |
37,134 |
10,739 |
|
109,612 |
26,640 |
5,040 |
4,980 |
34,881 |
10,328 |
|
109,326 |
20,650 |
5,040 |
4,972 |
34,723 |
10,328 |
|
100,493 |
17,816 |
5,040 |
4,969 |
34,157 |
10,174 |
|
97,525 |
15,280 |
5,039 |
4,969 |
30,517 |
9,809 |
|
95,641 |
13,961 |
5,039 |
4,962 |
26,503 |
9,009 |
|
94,641 |
11,154 |
5,038 |
4,960 |
25,365 |
8,839 |
|
90,058 |
10,363 |
5,033 |
4,958 |
20,440 |
7,847 |
|
80,165 |
8,592 |
5,033 |
4,950 |
16,364 |
7,290 |
|
80,073 |
8,385 |
5,033 |
4,931 |
15,122 |
7,131 |
|
75,876 |
6,696 |
5,027 |
4,910 |
14,582 |
6,944 |
|
69,663 |
5,536 |
5,026 |
4,907 |
11,865 |
6,505 |
|
69,494 |
5,239 |
5,024 |
4,905 |
10,145 |
6,177 |
|
65,937 |
5,141 |
5,024 |
4,901 |
9,578 |
6,068 |
|
60,456 |
4,879 |
5,023 |
4,891 |
6,847 |
5,364 |
|
51,708 |
|
5,018 |
4,873 |
6,460 |
5,248 |
|
|
|
5,018 |
4,868 |
|
4,881 |
|
|
|
5,018 |
4,844 |
|
|
|
|
|
5,016 |
4,841 |
|
|
|
|
|
5,009 |
4,836 |
|
|
|
|
|
4,996 |
4,824 |
|
|
|
|
|
4,992 |
4,818 |
|
|
6. Osmium Mass Balance,
Geochimica et Cosmochimica Acta, Volume 75 (2011), Pages 5574–5596
|
187Os/188Os |
187Os/188Os |
187Os/188Os |
187Os/188Os |
|
-40,546 |
-1,176 |
-282 |
321 |
|
-14,916 |
-1,143 |
-279 |
403 |
|
-9,286 |
-1,037 |
-266 |
420 |
|
-8,386 |
-988 |
-248 |
420 |
|
-7,274 |
-939 |
-202 |
600 |
|
-7,240 |
-939 |
-181 |
621 |
|
-5,980 |
-906 |
-120 |
631 |
|
-4,981 |
-857 |
-88 |
641 |
|
-4,474 |
-841 |
-81 |
714 |
|
-3,230 |
-824 |
-6 |
794 |
|
-2,821 |
-775 |
27 |
812 |
|
-2,281 |
-736 |
46 |
829 |
|
-2,183 |
-687 |
109 |
927 |
|
-1,904 |
-646 |
173 |
950 |
|
-1,806 |
-644 |
191 |
978 |
|
-1,593 |
-513 |
223 |
1,033 |
|
-1,431 |
-497 |
223 |
1,091 |
|
-1,250 |
-423 |
240 |
1,385 |
|
-1,230 |
-338 |
272 |
1,500 |
|
-1,196 |
-335 |
289 |
1,519 |
|
-1,184 |
-302 |
299 |
|
References
1. Sr-Nd-Pb isotope systematics of mantle xenoliths, Geochimica et Cosmochimica Acta, 2001, Volume 65,
Number 22, Pages 4243-4255
2. Northern Canadian Cordillera, Geochimica et Cosmochimica Acta, 2000, Volume 64, Number 17,
Pages 3061-3071
3. The age of Lithospheric Mantle, Chemical Geology, Volume 196 (2003), Pages 107– 129
4. The Isotope and Trace Element Budget, Journal Of Petrology, 2000, Volume 41, Number 6, Pages 759-788
5. Cu-Pb-Zn-Ag Mineralisation, Mineral Deposita, 2010, Volume 45, Pages 393-410
6. Osmium mass balance, Geochimica et Cosmochimica Acta, Volume 75 (2011), Pages 5574–5596