The Geological
Timescale Versus Radiometric Dating
By
Paul Nethercott
October 2014
The Eo Archean Period
4,000 To 4,100 Million Years Ago
1. Dhofar 300 and Dhofar 007 Eucrites,
Meteoritics & Planetary Science, 2005, Volume 40, Nr 9/10, Pages 1433-1454
|
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
40Ar/39Ar |
|
9,680 |
4,753 |
3,947 |
3,788 |
3,664 |
3,497 |
|
9,015 |
4,741 |
3,918 |
3,787 |
3,661 |
3,491 |
|
8,957 |
4,720 |
3,916 |
3,785 |
3,635 |
3,486 |
|
8,485 |
4,681 |
3,914 |
3,785 |
3,632 |
3,484 |
|
7,632 |
4,494 |
3,908 |
3,784 |
3,631 |
3,481 |
|
7,582 |
4,414 |
3,907 |
3,783 |
3,609 |
3,480 |
|
7,011 |
4,354 |
3,906 |
3,777 |
3,608 |
3,448 |
|
6,064 |
4,317 |
3,900 |
3,773 |
3,603 |
3,416 |
|
6,033 |
4,272 |
3,893 |
3,768 |
3,593 |
3,406 |
|
5,793 |
4,247 |
3,885 |
3,766 |
3,563 |
3,404 |
|
5,721 |
4,229 |
3,885 |
3,760 |
3,556 |
3,401 |
|
5,656 |
4,193 |
3,881 |
3,752 |
3,554 |
3,383 |
|
5,516 |
4,185 |
3,880 |
3,746 |
3,553 |
3,336 |
|
5,498 |
4,180 |
3,876 |
3,733 |
3,549 |
3,326 |
|
5,395 |
4,177 |
3,872 |
3,732 |
3,547 |
3,248 |
|
5,237 |
4,050 |
3,868 |
3,726 |
3,542 |
3,202 |
|
5,137 |
4,011 |
3,861 |
3,707 |
3,536 |
3,130 |
|
5,035 |
4,007 |
3,842 |
3,702 |
3,526 |
3,031 |
|
5,035 |
4,004 |
3,840 |
3,701 |
3,524 |
2,673 |
|
4,998 |
3,996 |
3,832 |
3,698 |
3,520 |
2,257 |
|
4,962 |
3,977 |
3,829 |
3,688 |
3,511 |
2,185 |
|
4,788 |
3,957 |
3,806 |
3,687 |
3,503 |
|
2. Young Martian Basalts,
Geochimica et Cosmochimica Acta, Volume 72 (2008), Pages 5819-5837
|
39Ar/40Ar Age |
39Ar/40Ar Age |
39Ar/40Ar Age |
39Ar/40Ar Age |
|
Northwest Africa |
Northwest Africa |
Allan Hills |
Allan Hills |
|
6,920 |
821 |
8,180 |
2,694 |
|
6,729 |
803 |
7,230 |
2,692 |
|
4,643 |
790 |
7,083 |
1,742 |
|
3,303 |
777 |
6,464 |
1,455 |
|
2,840 |
730 |
6,201 |
752 |
|
2,693 |
726 |
6,192 |
519 |
|
2,246 |
724 |
6,126 |
373 |
|
2,120 |
654 |
5,342 |
|
|
1,631 |
607 |
5,081 |
|
|
1,490 |
587 |
5,077 |
|
|
1,469 |
557 |
5,046 |
|
|
1,223 |
553 |
4,196 |
|
|
1,170 |
512 |
4,038 |
|
|
1,091 |
476 |
3,677 |
|
|
935 |
460 |
2,880 |
|
|
901 |
456 |
2,808 |
|
|
844 |
362 |
2,779 |
|
|
827 |
360 |
2,697 |
|
|
824 |
|
2,697 |
|
|
Sample |
39Ar/40Ar Age |
|
Number |
Million Years |
|
1 |
8,064 |
|
2 |
7,192 |
|
3 |
7,064 |
|
4 |
6,872 |
|
5 |
6,679 |
|
6 |
6,423 |
|
7 |
6,205 |
|
8 |
6,179 |
|
9 |
6,103 |
|
0 |
5,346 |
|
11 |
5,103 |
|
12 |
5,103 |
|
13 |
5,026 |
|
14 |
4,654 |
3. Chronology And Isotope Systematics,
Earth And Planetary Science Letters, 2007, Volume 261, Pages 491 - 499
|
Pb/Pb |
U/Pb |
U/Pb |
U/Xe |
|
4,159 |
4,950 |
3,840 |
4,240 |
|
4,126 |
4,720 |
3,804 |
3,960 |
|
4,126 |
4,275 |
3,802 |
3,690 |
|
4,102 |
4,183 |
3,700 |
3,640 |
|
4,063 |
4,019 |
3,660 |
3,570 |
|
4,043 |
4,010 |
3,660 |
3,450 |
|
4,031 |
3,970 |
3,600 |
3,330 |
|
4,031 |
3,960 |
3,500 |
3,300 |
|
4,026 |
3,940 |
3,470 |
2,870 |
|
4,024 |
3,915 |
3,450 |
2,800 |
|
4,013 |
3,910 |
3,410 |
2,760 |
|
4,013 |
3,897 |
3,140 |
|
|
4,005 |
3,881 |
3,020 |
|
|
4,000 |
3,870 |
3,010 |
|
|
3,986 |
3,850 |
2,970 |
|
|
3,976 |
3,840 |
2,960 |
|
4. Shocked Meteorites: Argon-40/Argon-39,
Meteoritics And Planetary Science, 1997, Volume 32, Pages 647 - 670
|
Meteorite Sample |
Maximum Age |
Minimum Age |
Average Age |
Difference |
|
A. Rose City (H5/S6) host rock |
4,766 |
193 |
1,411 |
4,573 |
|
B. Rose City (H5/S6) melt |
4,529 |
2,126 |
3,404 |
2,403 |
|
C. Rose City (H5/S6) host rock #1 |
3,876 |
231 |
1,782 |
3,645 |
|
D. Rose City (H5/S6) host rock #2 |
3,259 |
293 |
1,098 |
2,966 |
|
E. Travis County (H5/S4) whole rock |
3,614 |
295 |
915 |
3,319 |
|
F. Yanzhuang (H6/S6) host rock |
5,598 |
65 |
1,591 |
5,533 |
|
G. Yanzhuang (H6/S6) melt fragment |
10,217 |
1,902 |
3,386 |
8,315 |
|
H. Yanzhuang (H6/S6) melt vein |
7,016 |
1,314 |
3,117 |
5,702 |
|
I. Alfianello (L6/S5) whole rock |
3,470 |
968 |
2,092 |
2,502 |
|
J. Bluff (L6/S6) host rock |
13,348 |
506 |
2,018 |
12,842 |
|
K. Bluff (L6/S6) melt |
3,773 |
554 |
1,257 |
3,219 |
|
L. Mbale (L5-6) whole rock |
3,531 |
466 |
1,099 |
3,065 |
|
M. McKinney (L4/S4-5) whole rock |
1,821 |
499 |
1,054 |
1,322 |
|
N. Ness County (L6/S6) host rock #I |
5,052 |
987 |
3,081 |
4,065 |
|
O. Ness County (L6/S6) host rock #2 |
6,668 |
1,997 |
3,680 |
4,671 |
|
P. Paranaiba (L6/S6) host mk #I |
3,332 |
453 |
1,082 |
2,879 |
|
Q. Paranaiba (L6/s6) host rock #2 |
5,593 |
3,110 |
3,841 |
2,483 |
|
R. Taiban (L5/S6) host rock |
2,845 |
492 |
881 |
2,353 |
|
S. Taiban (L5/S6) melt |
1,435 |
156 |
668 |
1,279 |
|
T. Walters (L6/S4) host rock |
3,452 |
1,592 |
2,674 |
1,860 |
|
U. Walters (L6/S4) melt |
4,074 |
2,026 |
3,214 |
2,048 |
|
V. Beeler (LU/S4) host rock #I |
6,466 |
798 |
3,083 |
5,668 |
|
W. Beeler (LL6/S4) host rock #2 |
6,609 |
1,491 |
3,449 |
5,118 |
|
X. ALHA 8101 1 (eucrite) basaltic clast |
3,818 |
375 |
2,687 |
3,443 |
|
Y. ALHA 8101 1 (eucrite) melt |
2,827 |
244 |
1,087 |
2,583 |
|
Z. Padvaminkai (eucrite) hasalt |
3,925 |
596 |
2,486 |
3,329 |
|
1. Padvaminkai (eucrite) melt |
3,984 |
1,586 |
2,946 |
2,398 |
|
2. Padvarninkai Eucrite |
3,462 |
1,549 |
2,301 |
1,913 |
5. Ion Microprobe U-Th-Pb Dating,
Meteoritics & Planetary Science, 2003, Volume 38, Number 11, Pages 1697 - 1703
|
Pb207/Pb206 |
U238/Pb206 |
Th232/Pb208 |
|
4,510 |
6,434 |
6,110 |
|
4,469 |
5,705 |
5,113 |
|
4,438 |
5,522 |
5,068 |
|
4,310 |
5,406 |
4,365 |
|
4,220 |
5,262 |
4,169 |
|
4,169 |
4,952 |
4,038 |
|
4,165 |
4,523 |
3,928 |
|
4,147 |
4,484 |
3,685 |
|
4,075 |
4,110 |
3,676 |
|
4,055 |
3,789 |
3,619 |
|
4,055 |
3,496 |
3,408 |
|
3,855 |
3,470 |
2,895 |
6. Isotopic Systematics of the Goalpara Ureilite,
Geochimica et Cosmochimica Acta, 1995, Volume 59, Number 2, Pages 381-390
|
206Pb/238U |
206Pb/238U |
208Pb/232Th |
208Pb/232Th |
207Pb/206Pb |
207Pb/206Pb |
|
51,612 |
25,332 |
173,633 |
84,307 |
5,279 |
5,024 |
|
50,359 |
25,275 |
172,926 |
83,781 |
5,225 |
5,022 |
|
48,966 |
24,764 |
142,070 |
82,585 |
5,209 |
5,022 |
|
43,933 |
24,661 |
134,555 |
80,381 |
5,206 |
5,018 |
|
41,520 |
23,493 |
131,778 |
78,001 |
5,174 |
5,018 |
|
41,032 |
22,785 |
130,861 |
67,923 |
5,162 |
5,017 |
|
38,205 |
22,505 |
130,120 |
66,266 |
5,147 |
5,017 |
|
37,924 |
22,495 |
128,632 |
61,731 |
5,131 |
5,016 |
|
36,606 |
21,441 |
112,890 |
57,758 |
5,098 |
5,013 |
|
36,368 |
20,332 |
111,967 |
57,329 |
5,081 |
5,012 |
|
36,184 |
19,044 |
106,435 |
40,772 |
5,056 |
5,011 |
|
33,844 |
16,716 |
104,843 |
39,216 |
5,054 |
5,008 |
|
33,414 |
16,467 |
103,441 |
38,302 |
5,047 |
5,008 |
|
32,571 |
13,288 |
103,415 |
38,151 |
5,046 |
5,007 |
|
30,102 |
13,086 |
101,283 |
34,121 |
5,036 |
5,007 |
|
29,479 |
12,721 |
98,174 |
30,901 |
5,036 |
5,007 |
|
29,155 |
12,583 |
96,703 |
19,147 |
5,034 |
5,005 |
|
28,704 |
11,801 |
94,034 |
17,658 |
5,033 |
5,001 |
|
26,826 |
10,958 |
93,451 |
|
5,032 |
4,996 |
|
26,717 |
4,929 |
|
|
5,031 |
4,994 |
|
25,458 |
|
|
|
5,029 |
4,979 |
References
1. Dhofar 300 and Dhofar 007 Eucrites, Meteoritics & Planetary Science, 2005, Volume 40, Nr 9/10,
Pages 1433-1454
2. Young Martian Basalts, Geochimica et Cosmochimica Acta, Volume 72 (2008), Pages 5819-5837
3. Chronology And Isotope Systematics, Earth And Planetary Science Letters, 2007, Volume 261, Pages 491 - 499
4. Shocked meteorites: Argon-40/argon-39, Meteoritics And Planetary Science, 1997, Volume 32, Pages 647 - 670
5. Ion Microprobe U-Th-Pb Dating, Meteoritics & Planetary Science, 2003, Volume 38, Number 11,
Pages 1697 - 1703
6. Isotopic Systematics of the Goalpara Ureilite, Geochimica et Cosmochimica Acta, 1995, Volume 59, Number 2, Pages 381-390