The Geological
Timescale Versus Radiometric Dating
By
Paul Nethercott
October 2014
The Devonian Period
372 To 423 Million Years Ago
1. A Pb Isotope Investigation,
Doklady Earth Sciences, 2014, Volume 454, Part 1, pp. 25–28
|
207Pb/206Pb |
206Pb/238U |
208Pb/232Th |
|
5,011 |
7,462 |
13,590 |
|
4,999 |
6,466 |
13,067 |
|
4,959 |
4,424 |
8,159 |
|
4,943 |
4,192 |
7,162 |
|
4,902 |
3,266 |
5,276 |
|
4,889 |
3,009 |
5,275 |
|
4,885 |
2,806 |
4,570 |
|
4,836 |
2,375 |
4,543 |
|
4,833 |
2,264 |
3,959 |
|
4,829 |
2,158 |
3,672 |
|
4,812 |
2,027 |
3,360 |
|
4,798 |
1,959 |
1,802 |
2. Fluid Flow and Diffusion,
Journal Of Petrology, 1997, Volume 38, Number 11, Pages 1489-1512
|
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
|
10,993 |
783 |
588 |
517 |
448 |
|
10,744 |
771 |
581 |
511 |
448 |
|
8,439 |
758 |
581 |
508 |
446 |
|
2,971 |
755 |
577 |
503 |
445 |
|
2,063 |
743 |
575 |
502 |
444 |
|
2,011 |
724 |
575 |
501 |
444 |
|
1,963 |
707 |
574 |
501 |
441 |
|
1,840 |
700 |
573 |
499 |
441 |
|
1,744 |
700 |
572 |
499 |
441 |
|
1,696 |
688 |
568 |
492 |
438 |
|
1,586 |
681 |
567 |
489 |
436 |
|
1,496 |
658 |
567 |
486 |
433 |
|
1,416 |
656 |
564 |
486 |
432 |
|
1,375 |
648 |
563 |
484 |
429 |
|
1,239 |
645 |
562 |
473 |
423 |
|
1,170 |
643 |
555 |
470 |
421 |
|
1,107 |
639 |
554 |
470 |
413 |
|
1,104 |
627 |
554 |
469 |
404 |
|
1,018 |
627 |
549 |
466 |
395 |
|
979 |
619 |
548 |
465 |
388 |
|
966 |
609 |
546 |
465 |
359 |
|
951 |
607 |
546 |
462 |
358 |
|
939 |
602 |
545 |
460 |
357 |
|
929 |
599 |
545 |
459 |
355 |
|
927 |
597 |
544 |
457 |
352 |
|
859 |
595 |
540 |
452 |
347 |
|
813 |
594 |
536 |
452 |
336 |
|
811 |
594 |
532 |
451 |
325 |
|
806 |
589 |
524 |
450 |
316 |
|
789 |
589 |
520 |
449 |
299 |
3. U–Th–Pb Geochronology,
Gondwana Research, Volume 21 (2012) 728–744
|
208Pb/232Th |
238U/206Pb |
207Pb/206Pb |
|
521 |
5,140 |
4,741 |
|
512 |
3,084 |
4,703 |
|
499 |
2,245 |
4,668 |
|
479 |
1,833 |
4,508 |
|
468 |
1,758 |
4,492 |
|
461 |
1,569 |
4,276 |
|
441 |
1,419 |
4,149 |
|
438 |
1,253 |
4,085 |
|
425 |
1,248 |
4,077 |
|
423 |
1,118 |
3,996 |
|
419 |
1,090 |
3,949 |
|
407 |
1,047 |
3,901 |
|
404 |
1,035 |
3,890 |
4. Siberian Meimechites and Kimberlites,
Geochemistry, Geophysics And Geosystems, Volume 7, Number 11, 2006
|
206Pb/238U |
207Pb/206Pb |
87Rb/86Sr |
147Sm/144Nd |
176Lu/177Hf |
187Re/188Os |
|
8,176 |
5,021 |
252 |
252 |
268 |
251 |
|
8,142 |
4,997 |
252 |
252 |
264 |
251 |
|
5,561 |
4,992 |
252 |
252 |
263 |
251 |
|
5,296 |
4,992 |
251 |
252 |
263 |
251 |
|
5,228 |
4,988 |
251 |
251 |
261 |
251 |
|
5,058 |
4,983 |
251 |
251 |
259 |
251 |
|
4,898 |
4,967 |
251 |
251 |
259 |
251 |
|
4,243 |
4,943 |
251 |
251 |
258 |
251 |
|
3,662 |
4,933 |
251 |
251 |
258 |
251 |
|
3,459 |
4,928 |
251 |
251 |
258 |
251 |
|
3,423 |
4,928 |
251 |
251 |
258 |
251 |
|
3,348 |
4,926 |
250 |
251 |
258 |
251 |
5. Excess Radiogenic Argon,
Earth and Planetary Science Letters, 1972, Volume 14, Pages 403 - 412
|
K/Ar |
K/Ar |
K/Ar |
K/Ar |
K/Ar |
|
2,724 |
831 |
585 |
479 |
414 |
|
2,098 |
747 |
578 |
443 |
410 |
|
1,770 |
738 |
564 |
432 |
409 |
|
1,348 |
731 |
561 |
431 |
408 |
|
1,267 |
710 |
558 |
427 |
407 |
|
1,202 |
682 |
548 |
425 |
402 |
|
1,067 |
675 |
530 |
423 |
401 |
|
1,030 |
637 |
495 |
423 |
399 |
|
965 |
621 |
486 |
420 |
396 |
|
905 |
600 |
482 |
417 |
392 |
|
858 |
589 |
480 |
415 |
364 |
6. Neo-Tethyan Ophiolite in SW Turkey,
Lithos, Volume 132-133 (2012) 50–69
|
187Os/188Os |
|
18,849 |
|
18,521 |
|
16,230 |
|
15,084 |
|
13,120 |
|
5,592 |
|
4,937 |
|
420 |
|
-14,867 |
|
-31,888 |
|
-175,916 |
7. U–Th–Pb systematics of Allanite,
Geochimica et Cosmochimica Acta, Volume 135 (2014) 1–28
|
207Pb/206Pb |
207Pb/206Pb |
206Pb/238U |
206Pb/238U |
207Pb/235U |
208Pb/232Th |
|
2,707 |
4,901 |
2,850 |
3,125 |
2,744 |
10,619 |
|
2,706 |
4,901 |
2,745 |
2,975 |
2,723 |
9,982 |
|
2,702 |
4,898 |
2,711 |
2,939 |
2,703 |
7,098 |
|
2,699 |
4,873 |
2,706 |
2,802 |
2,702 |
6,608 |
|
2,699 |
4,833 |
2,699 |
2,802 |
2,698 |
4,980 |
|
2,697 |
4,788 |
2,692 |
2,792 |
2,695 |
4,134 |
|
2,697 |
4,778 |
2,680 |
2,788 |
2,686 |
2,715 |
|
2,696 |
4,743 |
2,673 |
2,783 |
2,673 |
2,711 |
|
2,696 |
4,683 |
2,671 |
2,767 |
2,673 |
2,711 |
|
2,692 |
4,518 |
2,657 |
2,753 |
2,668 |
2,638 |
|
2,685 |
4,436 |
2,643 |
2,736 |
2,664 |
2,368 |
|
2,685 |
4,309 |
2,627 |
2,733 |
2,660 |
629 |
|
2,667 |
4,213 |
2,593 |
2,727 |
2,627 |
507 |
|
2,660 |
3,790 |
2,559 |
2,706 |
2,625 |
456 |
|
2,658 |
3,565 |
2,535 |
2,614 |
2,578 |
414 |
|
2,649 |
3,423 |
2,257 |
2,314 |
2,496 |
413 |
|
2,593 |
3,356 |
1,977 |
2,143 |
2,358 |
408 |
|
1,512 |
3,348 |
1,107 |
1,188 |
1,098 |
379 |
|
1,430 |
3,296 |
1,107 |
1,151 |
1,096 |
329 |
|
1,095 |
3,283 |
1,095 |
1,147 |
1,096 |
285 |
|
1,069 |
3,272 |
1,081 |
1,139 |
1,079 |
45 |
|
1,069 |
3,040 |
1,081 |
1,132 |
1,079 |
31 |
|
1,069 |
3,039 |
1,059 |
1,124 |
1,064 |
31 |
|
1,069 |
3,032 |
1,059 |
1,106 |
1,057 |
31 |
|
1,069 |
3,017 |
999 |
1,052 |
1,026 |
30 |
|
1,069 |
3,009 |
431 |
737 |
430 |
30 |
|
1,041 |
2,985 |
424 |
692 |
419 |
30 |
8. Age Spectra Of Whole-Rocks,
Chemical Geology, 1987, Volume 66, pages 73 - 88
|
Maximum Age |
Minimum Age |
Average Age |
|
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
|
470 |
343 |
422 |
|
500 |
146 |
341 |
|
484 |
115 |
388 |
|
481 |
121 |
381 |
|
487 |
273 |
446 |
|
432 |
189 |
365 |
|
373 |
161 |
311 |
|
364 |
62 |
266 |
|
367 |
169 |
319 |
|
407 |
330 |
362 |
|
437 |
297 |
386 |
9. A Depleted Mantle Source For Kimberlites,
Earth and Planetary Science Letters, Volume 73, 1985, Pages 269-277
|
207Pb/206Pb |
206Pb/238U |
87Rb/86Sr |
147Sm/144Nd |
|
5,017 |
10,870 |
146 |
80 |
|
5,011 |
7,656 |
129 |
78 |
|
5,005 |
5,433 |
116 |
77 |
|
5,003 |
4,130 |
108 |
76 |
|
5,001 |
2,179 |
100 |
75 |
|
4,997 |
2,014 |
85 |
71 |
|
4,985 |
1,391 |
85 |
70 |
References
1. A Pb Isotope Investigation, Doklady Earth Sciences, 2014, Volume 454, Part 1, pp. 25–28
2. Fluid Flow and Diffusion, Journal Of Petrology, 1997, Volume 38, Number 11, Pages 1489-1512
3. U–Th–Pb geochronology, Gondwana Research, Volume 21 (2012) 728–744
4. Siberian Meimechites and Kimberlites, Geochemistry, Geophysics And Geosystems, Volume 7, Number 11, 2006
5. Excess Radiogenic Argon, Earth and Planetary Science Letters, 1972, Volume 14, Pages 403 - 412
6. Neo-Tethyan Ophiolite in SW Turkey, Lithos, Volume 132-133 (2012) 50–69
7. U–Th–Pb systematics of allanite, Geochimica et Cosmochimica Acta, Volume 135 (2014) 1–28
8. Age Spectra Of Whole-Rocks, Chemical Geology, 1987, Volume 66, pages 73 - 88
9. A Depleted Mantle Source For Kimberlites, Earth and Planetary Science Letters, Volume 73, 1985, Pages 269-277