The Geological
Timescale Versus Radiometric Dating
By
Paul Nethercott
October 2014
The Ediacaran Period
541 To 850 Million Years Ago
1. Discordant 40Ar/39Ar Ages,
Chemical Geology, 1991, Volume 86, Pages 139 - 160
|
Maximum Age |
Minimum Age |
Age Difference |
Percent |
|
Million Years |
Million Years |
Million Years |
Difference |
|
3,680 |
1,622 |
2,058 |
226% |
|
1,691 |
1,144 |
547 |
147% |
|
1,974 |
1,130 |
844 |
174% |
|
1,132 |
1,127 |
5 |
100% |
|
3,126 |
1,078 |
2,048 |
289% |
|
1,319 |
93 |
1,226 |
1,418% |
|
3,827 |
1,142 |
2,685 |
335% |
|
1,241 |
882 |
359 |
140% |
|
904 |
493 |
411 |
183% |
|
741 |
398 |
343 |
186% |
|
768 |
606 |
162 |
126% |
|
954 |
560 |
394 |
170% |
|
1,184 |
414 |
770 |
285% |
2. Re-Os isotope Systematics in Black Shales,
Geochimica et Cosmochimica Acta, Volume 63 (1999) No. 16, Pages 2381-2392
|
187Os/186Os |
187Os/186Os |
|
-1,872,420 |
-1,113,063 |
|
-1,443,744 |
-606,937 |
|
-566,893 |
-584,266 |
|
-505,023 |
-580,090 |
|
-470,375 |
-400,725 |
|
-421,663 |
-370,785 |
|
-391,211 |
-359,104 |
|
-346,045 |
-336,846 |
|
-329,282 |
-334,108 |
|
-321,324 |
-307,241 |
|
-260,459 |
-293,157 |
|
-253,467 |
-282,324 |
|
-223,290 |
-270,840 |
|
-222,581 |
-264,143 |
|
-179,129 |
|
|
-146,254 |
|
3. A Metamorphosed Early Cambrian Crust,
Journal Of Petrology, 2004, Volume 45, Number 8, Pages 1689-1723
|
187Os/188Os |
187Os/188Os |
187Os/188Os |
|
-709,965 |
-17,764 |
-1,757 |
|
-681,323 |
-15,947 |
-1,348 |
|
-680,668 |
-15,718 |
-1,119 |
|
-653,500 |
-15,473 |
-595 |
|
-651,208 |
-14,834 |
-513 |
|
-623,712 |
-14,360 |
-366 |
|
-405,543 |
-13,378 |
-186 |
|
-105,768 |
-10,464 |
223 |
|
-88,927 |
-7,338 |
240 |
|
-23,050 |
-5,243 |
469 |
|
-18,026 |
-2,690 |
1,091 |
4. A Precise 232Th-208Pb Chronology,
Geochimica et Cosmochimica Acta, 1994, Volume 58, Number 15, Pages 3155-3169
|
187Os/188Os |
187Os/188Os |
187Os/188Os |
187Os/188Os |
|
-1,872,499 |
-566,919 |
-336,802 |
-270,844 |
|
-1,443,689 |
-505,053 |
-335,984 |
-264,133 |
|
-1,113,079 |
-470,355 |
-334,183 |
-259,714 |
|
-607,018 |
-421,746 |
-329,273 |
-253,495 |
|
-607,018 |
-400,796 |
-321,253 |
-223,380 |
|
-599,816 |
-391,140 |
-307,178 |
-222,562 |
|
-584,268 |
-370,845 |
-293,103 |
-179,190 |
|
-580,176 |
-370,845 |
-283,610 |
-146,292 |
|
-580,176 |
-359,061 |
-282,301 |
17,703 |
|
-579,522 |
-346,131 |
-282,301 |
17,867 |
5. Dating Scheelite Stages,
Geochimica et Cosmochimica Acta, Volume 61, Number 23, pp. 5005-5022, 1997
|
Pb207/Pb206 |
Pb207/Pb206 |
|
5,026 |
5,007 |
|
5,026 |
5,004 |
|
5,023 |
5,001 |
|
5,023 |
4,996 |
|
5,020 |
4,991 |
|
5,020 |
4,904 |
|
5,015 |
4,901 |
|
5,015 |
4,551 |
|
5,009 |
3,831 |
|
5,009 |
|
6. Multiple Metasomatic Events,
Lithos, Volume 112-S, 2009, Pages 896-912
|
147Sm/144Nd |
87Rb/86Sr |
|
2.188 |
1.504 |
|
1.909 |
1.495 |
|
1.807 |
1.457 |
|
1.644 |
0.400 |
|
1.623 |
|
|
1.129 |
|
|
1.070 |
|
|
1.016 |
|
|
0.628 |
|
|
0.495 |
|
7. The Mamonia Complex, Cyprus,
Chemical Geology, Volume 248, 2008, Pages 195-212
|
187Os/188Os |
187Re/188Os |
187Re/188Os |
|
-1,217 |
-1 |
-1 |
|
-284 |
255 |
662 |
|
-317 |
271 |
633 |
|
-137 |
472 |
732 |
|
-104 |
483 |
710 |
|
-22 |
541 |
843 |
|
534 |
1,150 |
1,550 |
|
-153 |
449 |
679 |
|
174 |
740 |
1,080 |
|
92 |
473 |
1,090 |
|
-333 |
448 |
637 |
|
-88 |
480 |
545 |
|
-759 |
-1 |
-1 |
|
-235 |
209 |
248 |
|
-170 |
540 |
562 |
|
-1,348 |
|
|
|
-55 |
|
|
|
387 |
|
|
8. 40Ar/39Ar Dating Of The Long Range Dikes,
Earth and Planetary Science Letters, 1974, Volume 22, Pages 256 – 266
|
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
|
18,620 |
1,347 |
668 |
610 |
552 |
|
4,400 |
1,099 |
665 |
601 |
533 |
|
3,451 |
854 |
651 |
584 |
519 |
|
2,631 |
777 |
640 |
571 |
477 |
|
2,385 |
695 |
640 |
559 |
476 |
|
1,949 |
688 |
639 |
557 |
372 |
|
1,474 |
669 |
630 |
555 |
287 |
9. The Southeast Australian Lithosphere,
Earth and Planetary Science Letters, Volume 86, 1987, Pages 327-340
|
87Rb/86Sr |
87Rb/86Sr |
|
218,042 |
1,395 |
|
64,770 |
1,311 |
|
54,457 |
1,230 |
|
48,074 |
1,108 |
|
45,734 |
1,080 |
|
45,207 |
1,069 |
|
38,581 |
1,049 |
|
26,113 |
888 |
|
17,246 |
786 |
|
11,813 |
505 |
|
11,657 |
185 |
|
4,248 |
181 |
|
3,704 |
157 |
|
3,413 |
134 |
|
2,783 |
42 |
|
1,713 |
-54 |
|
1,402 |
-15,716 |
10. The Fossil LL6 Chondrite,
Geochemica Et Cosmochemica Acta, 2010, Volume 74, pages 1734 – 1747
|
Ar40/Ar39 |
Ar40/Ar39 |
Ar40/Ar39 |
Ar40/Ar39 |
Ar40/Ar39 |
Ar40/Ar39 |
|
11,251 |
2,464 |
924 |
479 |
328 |
214 |
|
7,119 |
2,065 |
814 |
428 |
312 |
211 |
|
5,475 |
2,043 |
813 |
423 |
296 |
188 |
|
3,889 |
1,892 |
694 |
367 |
292 |
186 |
|
3,889 |
1,868 |
617 |
361 |
274 |
186 |
|
3,759 |
1,772 |
565 |
359 |
256 |
177 |
|
3,708 |
1,751 |
556 |
348 |
250 |
174 |
|
2,889 |
1,626 |
521 |
344 |
249 |
166 |
|
2,849 |
1,336 |
488 |
336 |
238 |
164 |
|
2,485 |
1,227 |
486 |
336 |
234 |
|
11. The Strangways Impact Structure,
Earth And Planetary Science Letters, 1999, Volume 172, Page 207
|
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
|
8,569 |
1,093 |
812 |
736 |
|
5,910 |
1,043 |
811 |
736 |
|
5,127 |
1,031 |
803 |
734 |
|
5,080 |
1,010 |
802 |
733 |
|
5,020 |
996 |
789 |
727 |
|
4,843 |
964 |
781 |
722 |
|
4,641 |
963 |
778 |
713 |
|
4,404 |
954 |
775 |
705 |
|
4,106 |
953 |
773 |
701 |
|
3,894 |
944 |
773 |
700 |
|
1,686 |
929 |
767 |
698 |
|
1,653 |
897 |
766 |
692 |
|
1,637 |
891 |
759 |
685 |
|
1,598 |
866 |
758 |
684 |
|
1,572 |
847 |
758 |
684 |
|
1,495 |
834 |
758 |
680 |
|
1,276 |
833 |
756 |
671 |
|
1,271 |
822 |
755 |
669 |
|
1,256 |
818 |
751 |
643 |
|
1,237 |
815 |
746 |
641 |
|
1,108 |
815 |
744 |
633 |
12. Evolution of the Solonker Suture Zone,
Journal Of Asian Earth Sciences, Volume 34, 2009, Pages 245-257
|
Pb207/Pb206 |
Pb207/Pb206 |
207Pb/235U |
207Pb/235U |
|
1,799 |
303 |
3,398 |
349 |
|
1,554 |
250 |
3,385 |
334 |
|
902 |
245 |
3,370 |
327 |
|
768 |
232 |
1,788 |
320 |
|
571 |
232 |
1,536 |
312 |
|
552 |
204 |
897 |
305 |
|
499 |
200 |
777 |
297 |
|
488 |
162 |
545 |
297 |
|
460 |
109 |
515 |
290 |
|
428 |
84 |
502 |
290 |
|
412 |
79 |
412 |
282 |
|
379 |
54 |
398 |
282 |
|
354 |
-8 |
391 |
282 |
|
320 |
-571 |
370 |
218 |
13. Genesis of Plio-Pleistocene Volcanic Rocks,
Earth And Planetary Science Letters, Volume 180, 2000, Pages 259-270
|
207Pb/206Pb |
207Pb/206Pb |
|
5,071 |
5,049 |
|
5,044 |
5,043 |
|
5,046 |
5,061 |
|
5,035 |
4,933 |
|
4,945 |
4,976 |
14. Northern Canadian Cordillera Xenoliths,
Geochimica et Cosmochimica Acta, 2000, Volume 64, Number 17, Pages 3061-3071
|
Sample |
187Re/188Os |
187Re/188Os |
187Os/188Os |
|
AL-40 |
|
80 |
-530 |
|
AL-42 |
-1 |
460 |
-84 |
|
AL-46 |
|
-1 |
-924 |
|
AL-47 |
|
500 |
-40 |
|
AL-75 |
-1 |
430 |
-122 |
|
AL-76a |
-1 |
100 |
-513 |
|
AL-86 |
-1 |
520 |
-24 |
|
AL-88a |
320 |
-1 |
-1,053 |
|
AL-41 |
-1 |
480 |
-62 |
|
AL-49 |
|
1110 |
685 |
|
AL-52a |
-1 |
220 |
-366 |
|
AL-53 |
|
520 |
-24 |
|
AL-54 |
550 |
350 |
-215 |
|
AL-56 |
2400 |
250 |
-340 |
|
XLG-30N |
4500 |
630 |
109 |
|
XLG-29A |
-1 |
920 |
459 |
|
XLG-12A |
-1 |
-1 |
-721 |
|
XLG-25A |
540 |
-1 |
-1,983 |
|
RRX-19 |
680 |
640 |
120 |
|
RRX-21 |
610 |
510 |
-26 |
|
KLX-47 |
-1 |
330 |
-237 |
|
KRX-11b |
840 |
750 |
251 |
|
BTX-26b |
-1 |
-1 |
-939 |
15. Damaran-Lufilian Fold Belt of Central Africa,
Mineralium Deposita (1999), Volume 34, Pages 273-283
|
Pb207/Pb206 |
Pb207/Pb206 |
|
5,046 |
5,045 |
|
5,046 |
5,045 |
|
5,046 |
5,035 |
|
5,046 |
5,035 |
|
5,046 |
5,034 |
|
5,046 |
5,033 |
|
5,046 |
5,032 |
|
5,046 |
5,032 |
|
5,045 |
5,029 |
16. Measurement of U-Pb ages,
American Mineralogist, 2007, Volume 92, Pages 1925 - 1935
|
206Pb/238U |
206Pb/238U |
207Pb/235U |
207Pb/235U |
207Pb/206Pb |
207Pb/206Pb |
|
605 |
388 |
447 |
743 |
766 |
1,196 |
|
476 |
683 |
506 |
695 |
494 |
830 |
|
1,450 |
|
1,110 |
1,110 |
470 |
470 |
|
371 |
601 |
417 |
648 |
682 |
822 |
|
276 |
851 |
311 |
872 |
586 |
924 |
|
447 |
861 |
610 |
862 |
864 |
1,282 |
|
655 |
1,791 |
782 |
1752 |
1,168 |
1,704 |
|
488 |
2,754 |
607 |
2234 |
782 |
1,855 |
17. Chondrites and Os-rich alloys,
Geochimica et Cosmochimica Acta, Volume 70 (2006) 2093–2103
|
187Os/188Os |
187Os/188Os |
|
-140 |
-498 |
|
-144 |
-522 |
|
-148 |
-525 |
|
-176 |
-527 |
|
-211 |
-593 |
|
-238 |
-622 |
|
-326 |
-664 |
|
-395 |
-723 |
|
-398 |
-834 |
|
-483 |
-998 |
|
-493 |
-1,110 |
18. Evidence from Icelandic Picrites,
Geochimica et Cosmochimica Acta, Volume 71 (2007) 4570–4591
|
187Os/188Os |
187Os/188Os |
187Os/188Os |
|
-2,075 |
-2,122 |
-4,398,715 |
|
-2,019 |
-2,047 |
-3,166,131 |
|
-1,963 |
-1,964 |
-2,180,686 |
|
-1,751 |
-1,655 |
-1,572,168 |
|
-1,639 |
-1,513 |
-1,317,010 |
|
-1,556 |
-1,234 |
-1,088,366 |
|
-1,456 |
-1,221 |
-653,991 |
|
-1,340 |
-1,185 |
-543,515 |
|
-1,307 |
-1,170 |
-391,140 |
|
-1,291 |
-1,114 |
-326,164 |
|
-1,246 |
-1,092 |
-163,150 |
|
-1,132 |
-938 |
-726 |
|
-1,066 |
-743 |
27 |
|
-1,039 |
872 |
27 |
|
-1,021 |
1,859 |
27 |
|
-981 |
1,859 |
27 |
|
-970 |
1,860 |
|
|
-924 |
1,860 |
|
|
-695 |
1,860 |
|
|
|
1,861 |
|
19. Granulite Sulphides as Tracers,
Geochimica et Cosmochimica Acta, Volume 74 (2010) 5368–5381
|
187Os/188Os |
187Os/188Os |
|
-4,103,949 |
-1,043,357 |
|
-3,220,142 |
-994,256 |
|
-3,203,775 |
-945,156 |
|
-2,810,972 |
-896,056 |
|
-2,712,771 |
-830,588 |
|
-2,532,736 |
-814,222 |
|
-1,812,597 |
-699,654 |
|
-1,714,396 |
-683,287 |
|
-1,337,959 |
-617,820 |
|
-1,190,658 |
-405,052 |
|
-1,190,658 |
-159,549 |
|
-1,174,291 |
-61,349 |
|
-1,157,924 |
-61,349 |
|
-1,141,558 |
-28,615 |
|
-1,059,724 |
|
20. The Genesis Of Pb-Zn Deposits,
Gondwana Research, Volume 11 (2007) Page 382-395
|
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
|
5,072 |
5,066 |
5,064 |
5,061 |
|
5,070 |
5,066 |
5,064 |
5,061 |
|
5,069 |
5,065 |
5,063 |
5,060 |
|
5,069 |
5,065 |
5,063 |
5,059 |
|
5,068 |
5,065 |
5,063 |
5,059 |
|
5,067 |
5,065 |
5,063 |
5,059 |
|
5,067 |
5,065 |
5,063 |
5,059 |
|
5,067 |
5,064 |
5,062 |
5,058 |
|
5,067 |
5,064 |
5,062 |
5,057 |
|
5,067 |
5,064 |
5,062 |
5,056 |
|
5,066 |
5,064 |
5,062 |
5,054 |
|
5,066 |
5,064 |
5,061 |
|
21. Isotopic (Sr, Nd, Pb, and Os) Composition,
Chemical Geology, Volume 277 (2010), Pages 227-244
|
208Pb/232Th |
207Pb/206Pb |
|
30,279 |
5,085 |
|
28,507 |
5,080 |
|
22,938 |
5,079 |
|
21,966 |
5,044 |
|
20,002 |
5,044 |
|
19,637 |
5,039 |
|
18,624 |
5,027 |
|
17,207 |
5,017 |
|
16,108 |
5,017 |
|
15,412 |
5,017 |
|
11,755 |
5,015 |
|
11,343 |
5,010 |
|
10,203 |
5,008 |
References
1. Discordant 40-Ar /39-Ar Ages, Chemical Geology, 1991, Volume 86, Pages 139 - 160
2. Re-Os isotope systematics in black shales, Geochimica et Cosmochimica Acta, Volume 63 (1999) No. 16,
Pages 2381-2392
3. A Metamorphosed Early Cambrian Crust, Journal Of Petrology, 2004, Volume 45, Number 8, Pages 1689-1723
4. A Precise 232Th-208Pb Chronology, Geochimica et Cosmochimica Acta, 1994, Volume 58, Number 15,
Pages 3155-3169
5. Dating Scheelite Stages, Geochimica et Cosmochimica Acta, Volume 61, Number 23, pp. 5005-5022, 1997
6. Multiple Metasomatic Events, Lithos, Volume 112-S, 2009, Pages 896-912
7. The Mamonia complex, Cyprus, Chemical Geology, Volume 248, 2008, Pages 195-212
8. 40 Ar/39ar Dating Of The Long Range Dikes, Earth and Planetary Science Letters, 1974, Volume 22,
Pages 256 - 266
9. The southeast Australian lithospheric, Earth and Planetary Science Letters, Volume 86, 1987, Pages 327-340
10. The Fossil LL6 Chondrite, Geochemica Et Cosmochemica Acta, 2010, Volume 74, pages 1734 - 1747
11. The Strangways impact structure, Earth And Planetary Science Letters, 1999, Volume 172, Page 207
12. Evolution of the Solonker Suture Zone, Journal Of Asian Earth Sciences, Volume 34, 2009, Pages 245-257
13. Genesis of Plio-Pleistocene Volcanic Rocks, Earth And Planetary Science Letters, Volume 180, 2000,
Pages 259-270
14. Northern Canadian Cordillera Xenoliths, Geochimica et Cosmochimica Acta, 2000, Volume 64, Number 17,
Pages 3061-3071
15. Damaran-Lufilian Fold Belt of Central Africa, Mineralium Deposita (1999), Volume 34, Pages 273-283
16. Measurement of U-Pb ages, American Mineralogist, 2007, Volume 92, Pages 1925 - 1935
17. Chondrites and Os-rich alloys, Geochimica et Cosmochimica Acta, Volume 70 (2006) 2093–2103
18. Evidence from Icelandic picrites, Geochimica et Cosmochimica Acta, Volume 71 (2007) 4570–4591
19. Granulite sulphides as tracers, Geochimica et Cosmochimica Acta, Volume 74 (2010) 5368–5381
20. The Genesis Of Pb-Zn Deposits, Gondwana Research, Volume 11 (2007) Page 382-395
21. Isotopic (Sr, Nd, Pb, and Os) composition, Chemical Geology, Volume 277 (2010), Pages 227-244