The Geological
Timescale Versus Radiometric Dating
By
Paul Nethercott
November 2014
The Nectarian Period
4,300 To 4,500 Million Years Ago
1. 87Rb-87Sr Isochron Of The Norton County Achondrite,
Earth And Planetary Science Letters, Volume 3, 1967, Pages 179-189
|
87Rb/86Sr |
87Rb/86Sr |
|
4,871 |
4,251 |
|
4,577 |
4,199 |
|
4,577 |
4,185 |
|
4,567 |
4,185 |
|
4,560 |
4,170 |
|
4,536 |
4,060 |
|
4,519 |
4,012 |
|
4,466 |
3,673 |
|
4,373 |
-9,565 |
|
4,260 |
-13,515 |
|
4,256 |
-14,196 |
|
4,256 |
-16,277 |
2. U-Th-Pb Dating of Abee E4 Meteorite,
Earth and Planetary Science Letters, 1983, Volume 62, pages 132 - 146
|
206Pb/238U |
208Pb/232Th |
207Pb/206Pb |
|
27,806 |
86,711 |
5,370 |
|
26,605 |
84,996 |
5,364 |
|
27,370 |
86,616 |
5,364 |
|
23,272 |
85,323 |
5,283 |
|
28,051 |
85,725 |
5,371 |
|
27,476 |
83,944 |
5,367 |
|
18,801 |
93,166 |
5,082 |
|
28,127 |
82,811 |
5,368 |
|
26,517 |
81,174 |
5,367 |
|
22,143 |
75,483 |
5,333 |
3. Rb-Sr Ages Of Iron Meteorites,
Earth and Planetary Science Letters, 1967, Volume 2, Pages 397 - 408
|
Meteorite |
87R/86Sr |
Meteorite |
87R/86Sr |
|
Colomera A |
3,800 |
Odessa N1-8 |
4,300 |
|
|
3,800 |
|
4,200 |
|
|
3,800 |
|
4,400 |
|
|
3,800 |
|
4,900 |
|
|
3,800 |
|
4,800 |
|
|
3,700 |
|
4,600 |
|
Colomera D3 |
4,700 |
|
4,400 |
|
Four Corners AM 1 |
8,400 |
Toluca N-A3 |
5,000 |
|
|
9,300 |
|
4,700 |
|
|
9,100 |
|
4,900 |
|
|
9,100 |
|
4,900 |
|
|
8,500 |
Toluca N-AB1 |
4,600 |
|
|
8,200 |
|
4,600 |
|
Four Corners AM 2-B1 |
5,000 |
|
4,300 |
|
|
5,100 |
|
4,500 |
|
|
4,800 |
Forest City 1 |
4,900 |
|
|
4,500 |
|
4,500 |
|
Four Corners AM 2-B6 |
5,000 |
|
4,600 |
|
Four Corners H-1 |
5,000 |
Forest City 2 |
4,700 |
|
Four Corners H-3 |
4,900 |
Forest City |
4,600 |
|
|
4,400 |
Forest City |
5,000 |
|
|
4,600 |
Leedy 1 |
4,700 |
|
Four Corners N-1 |
4,700 |
|
4,800 |
|
|
5,200 |
Leedy 2 |
4,700 |
|
|
4,800 |
Bruderheim 1 |
4,700 |
|
Linwood H-B1 |
4,800 |
|
4,700 |
|
|
4,500 |
Bruderheim 2 |
4,800 |
|
|
4,600 |
Bruderheim 3 |
4,700 |
|
|
4,800 |
|
|
|
|
4,600 |
|
|
|
|
5,100 |
|
|
4. U-Th-Pb, Sm-Nd And Rb-Sr Model Ages,
http://www.lpi.usra.edu/meetings/lpsc1978/pdf/1289.pdf
|
Pb206/Pb207 |
Pb206/U238 |
Pb208/Th232 |
Nd143/Nd144 |
Rb87/Sr86 |
|
3,873 |
3,608 |
8,280 |
4,730 |
4,350 |
|
3,880 |
3,615 |
8,375 |
4,860 |
4,270 |
|
3,881 |
3,636 |
4,474 |
4,910 |
4,250 |
|
5,371 |
7,794 |
4,379 |
4,810 |
4,240 |
|
5,358 |
7,740 |
8,375 |
|
|
|
4,470 |
4,474 |
4,474 |
|
|
|
4,418 |
4,404 |
4,379 |
|
|
|
5,358 |
7,740 |
|
|
|
|
4,470 |
4,474 |
|
|
|
|
4,418 |
4,404 |
|
|
|
5. Shock-Melted Antarctic LL-Chondrites,
Geochimica et Cosmochimica Acta, 1990, Voume 54, Pages 3509-3523
|
87Rb/86Sr |
87Rb/86Sr |
|
21,611 |
8,405 |
|
14,466 |
8,153 |
|
12,968 |
7,590 |
|
12,354 |
6,947 |
|
11,946 |
6,899 |
|
10,868 |
6,756 |
|
10,727 |
6,556 |
|
10,623 |
6,192 |
|
10,162 |
6,157 |
|
9,888 |
5,981 |
|
9,237 |
5,677 |
|
9,161 |
5,491 |
|
9,015 |
5,483 |
|
8,988 |
5,458 |
|
8,921 |
5,453 |
|
8,869 |
5,388 |
|
8,753 |
5,319 |
|
8,675 |
3,969 |
|
8,556 |
|
6. Analyses of the Chondritic Meteorite Orvinio,
Meteoritics And Planetary Science, 2004, Volume 39, Number 9, Pages 1475 - 1493
|
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
|
17,178 |
4,038 |
3,290 |
2,713 |
1,651 |
1,132 |
756 |
|
9,023 |
4,010 |
3,240 |
2,680 |
1,622 |
1,038 |
738 |
|
8,500 |
3,908 |
3,230 |
2,537 |
1,620 |
1,019 |
735 |
|
8,330 |
3,763 |
3,220 |
2,503 |
1,620 |
1,014 |
729 |
|
7,800 |
3,720 |
3,170 |
2,460 |
1,600 |
999 |
711 |
|
7,200 |
3,660 |
3,170 |
2,334 |
1,588 |
977 |
703 |
|
7,100 |
3,656 |
3,160 |
2,280 |
1,540 |
956 |
680 |
|
6,400 |
3,640 |
3,130 |
2,194 |
1,529 |
948 |
678 |
|
5,070 |
3,620 |
3,130 |
2,169 |
1,490 |
936 |
654 |
|
5,060 |
3,600 |
3,120 |
2,084 |
1,480 |
932 |
586 |
|
4,400 |
3,580 |
3,060 |
2,080 |
1,380 |
927 |
570 |
|
4,390 |
3,570 |
3,011 |
2,076 |
1,366 |
926 |
555 |
|
4,350 |
3,560 |
2,858 |
2,020 |
1,346 |
922 |
550 |
|
4,325 |
3,455 |
2,857 |
1,940 |
1,296 |
904 |
541 |
|
4,250 |
3,391 |
2,855 |
1,908 |
1,273 |
871 |
536 |
|
4,190 |
3,330 |
2,820 |
1,810 |
1,243 |
864 |
526 |
|
4,180 |
3,330 |
2,770 |
1,783 |
1,239 |
854 |
370 |
|
4,170 |
3,328 |
2,757 |
1,723 |
1,226 |
835 |
324 |
|
4,110 |
3,317 |
2,750 |
1,715 |
1,185 |
817 |
|
|
4,050 |
3,300 |
2,742 |
1,710 |
1,154 |
815 |
|
7. 39Ar-40Ar Ages of Eucrites,
Meteoritics And Planetary Science, 2003, Volume 38, Number 5, Pages 669 – 710
|
Meteorite |
Maximum Age |
Minimum Age |
Average Age |
Age Difference |
|
A. QUE 97053,8 |
9,669 |
3,749 |
4,660 |
5,920 |
|
B. GRA 98098,26 WR |
7,008 |
3,239 |
4,470 |
3,769 |
|
C. PCA - 82502,81 |
5,431 |
3,300 |
4,366 |
2,131 |
|
D. PCA - 91007,26 |
4,460 |
1,560 |
4,062 |
2,900 |
|
E. Caldera |
4,493 |
2,819 |
4,110 |
1,674 |
|
F. Asuka-881388,55 |
4,853 |
3,250 |
4,360 |
1,603 |
|
G. Asuka-881467,42 |
4,465 |
202 |
3,814 |
4,263 |
|
H. GRO - 95533,7 |
4,096 |
2,823 |
3,635 |
1,273 |
|
I. QUE - 97014,5 |
4,553 |
2,947 |
3,527 |
1,606 |
|
J. Moama |
4,484 |
866 |
3,659 |
3,618 |
|
K. EET - 87520 |
5,481 |
2,004 |
4,180 |
3,477 |
|
L. Moore County |
6,742 |
1,827 |
4,064 |
4,915 |
|
M. Serra de Mage |
6,100 |
499 |
3,199 |
5,601 |
|
N. EET -87548 |
3,674 |
1,738 |
3,230 |
1,936 |
|
O. ALH -85001,32 |
4,754 |
3,097 |
3,600 |
1,657 |
|
P. Piplia Kalan |
4,284 |
162 |
3,526 |
4,122 |
|
Q. Sioux County |
4,513 |
2,189 |
3,810 |
2,324 |
|
R. Asuka-87272,49 |
3,652 |
342 |
2,895 |
3,310 |
|
S. Macibini Glass |
5,788 |
2,621 |
3,873 |
3,167 |
|
T. QUE - 94200,13 |
3,724 |
3,169 |
3,516 |
555 |
|
U. EET - 87509,24 |
7,496 |
4,026 |
4,382 |
3,470 |
|
V. EET - 87509,71 |
4,449 |
3,558 |
4,012 |
891 |
|
W. EET -87509,74 |
4,645 |
873 |
3,761 |
3,772 |
|
X. EET - 87531,21 |
4,176 |
3,301 |
3,861 |
875 |
|
Y. EET - 87503,53 |
5,209 |
3,568 |
3,856 |
1,641 |
|
Z. EET - 87503,23 |
5,324 |
2,294 |
3,524 |
3,030 |
8. Radiometric Ages of Basaltic Achondrites,
Geochimica et Cosmochimica Acta, 1997, Volume 61, Number 8, Pages 1713-1731
|
207Pb/P06Pb |
207Pb/P06Pb |
207Pb/P06Pb |
207Pb/P06Pb |
|
5,135 |
4,978 |
4,849 |
4,574 |
|
5,096 |
4,976 |
4,801 |
4,558 |
|
5,094 |
4,972 |
4,757 |
4,557 |
|
5,081 |
4,970 |
4,751 |
4,553 |
|
5,064 |
4,964 |
4,744 |
4,551 |
|
5,057 |
4,961 |
4,733 |
4,530 |
|
5,043 |
4,960 |
4,716 |
4,525 |
|
5,029 |
4,950 |
4,716 |
4,515 |
|
5,021 |
4,929 |
4,686 |
4,505 |
|
5,018 |
4,929 |
4,670 |
4,499 |
|
4,999 |
4,927 |
4,665 |
4,485 |
|
4,997 |
4,921 |
4,619 |
4,479 |
|
4,995 |
4,907 |
4,613 |
4,458 |
|
4,985 |
4,887 |
4,595 |
4,371 |
|
4,983 |
4,855 |
4,586 |
|
9. 39Ar/40Ar Dating Silicates From IIE Iron Meteorites,
Geochemica Et Cosmochemica Acta, 2000, Volume 64, Number 12, Pages 2133 - 2154
|
Watson |
Techado |
Miles |
Colomera |
Sombrerete |
|
3,968 |
4,794 |
4,414 |
5,164 |
4,572 |
|
3,909 |
4,495 |
4,411 |
4,552 |
4,567 |
|
3,843 |
4,488 |
4,411 |
4,510 |
4,559 |
|
3,791 |
4,487 |
4,404 |
4,507 |
4,551 |
|
3,729 |
4,487 |
4,396 |
4,507 |
4,546 |
|
3,685 |
4,481 |
4,385 |
4,501 |
4,546 |
|
3,682 |
4,473 |
4,313 |
4,499 |
4,544 |
|
3,681 |
4,433 |
4,313 |
4,488 |
4,544 |
|
3,678 |
4,407 |
4,297 |
4,485 |
4,542 |
|
3,675 |
4,349 |
4,293 |
4,482 |
4,541 |
|
3,675 |
4,332 |
4,247 |
4,480 |
4,540 |
|
3,672 |
4,241 |
4,056 |
4,479 |
4,540 |
|
3,670 |
3,735 |
3,763 |
4,473 |
4,539 |
|
3,667 |
|
3,315 |
4,473 |
4,536 |
|
3,644 |
|
2,938 |
4,469 |
4,536 |
|
3,632 |
|
2,660 |
4,468 |
4,535 |
|
3,627 |
|
1,465 |
4,465 |
4,533 |
|
3,391 |
|
|
4,465 |
4,527 |
|
3,337 |
|
|
4,465 |
4,502 |
|
2,830 |
|
|
4,464 |
4,476 |
|
2,677 |
|
|
4,456 |
4,363 |
|
2,501 |
|
|
4,451 |
4,261 |
|
2,275 |
|
|
4,437 |
3,949 |
|
|
|
|
4,403 |
|
|
|
|
|
4,387 |
|
|
|
|
|
4,323 |
|
|
|
|
|
4,142 |
|
|
|
|
|
4,110 |
|
|
|
|
|
4,021 |
|
|
|
|
|
3,852 |
|
|
|
|
|
3,499 |
|
|
|
|
|
3,194 |
|
References
1. 87Rb-87Sr Isochron Of The Norton County Achondrite, Earth And Planetary Science Letters, Volume 3, 1967, Pages 179-189
2. U-Th-Pb dating of Abee E4 Meteorite, Earth and Planetary Science Letters, 1983, Volume 62, pages 132 - 146
3. Rb-Sr Ages Of Iron Meteorites, Earth and Planetary Science Letters, 1967, Volume 2, Pages 397 - 408
4. U-Th-Pb, Sm-Nd And Rb-Sr Model Ages, http://www.lpi.usra.edu/meetings/lpsc1978/pdf/1289.pdf
5. Shock-Melted Antarctic LL-Chondrites, Geochimica et Cosmochimica Acta, 1990, Voume 54, Pages 3509-3523
6. Analyses of the chondritic meteorite Orvinio, Meteoritics And Planetary Science, 2004, Volume 39, Number 9,
Pages 1475 - 1493
7. 39Ar-40Ar Ages of Eucrites, Meteoritics And Planetary Science, 2003, Volume 38, Number 5, Pages 669 – 710
8. Radiometric ages of basaltic achondrites, Geochimica et Cosmochimica Acta, 1997, Volume 61, Number 8,
Pages 1713-1731
9. Silicates From IIE Iron Meteorites, Geochemica Et Cosmochemica Acta, 2000, Volume 64, Number 12,
Pages 2133 - 2154