The Geological
Timescale Versus Radiometric Dating
By
Paul Nethercott
November 2014
The Calymmian Period
1,600 To 1,800 Million Years Ago
1. The Age of Continental Roots,
Lithos, Volume 48, 1999, Pages 184
|
187Os/188Os |
|
2,780 |
|
3,170 |
|
3,490 |
|
3,560 |
|
3,600 |
|
4,030 |
|
4,620 |
|
4,670 |
|
5,180 |
|
5,710 |
|
6,990 |
|
7,060 |
|
7,440 |
|
8,380 |
2. Rb/Sr And Sm/Nd Studies,
Chemical Geology, 1985, Volume 52, Pages 249-271
|
Sample |
87Rb/86Sr |
87Rb/86Sr |
147Sm/144Nd |
147Sm/144Nd |
|
Number |
Isochron Age |
Model Age |
Isochron Age |
Model Age |
|
K-6 |
434 |
1,415 |
407 |
970 |
|
K-6 |
487 |
1,415 |
407 |
970 |
|
182-2 |
|
970 |
|
|
|
1428-3 |
|
5,000 |
418 |
|
|
U19-4 |
403 |
1,150 |
877 |
|
|
U19-4 |
405 |
1,150 |
877 |
|
|
S19-10 |
|
20,000 |
447 |
405 |
|
S53-10 |
|
16,000 |
|
|
|
S53-10 |
|
17,200 |
|
|
|
S53-10 |
|
15,800 |
|
|
|
579A-12 |
|
7,720 |
|
|
|
NV52A-14 |
|
1,690 |
|
|
|
NV52B-14 |
398 |
580 |
|
|
|
IB-51-15 |
|
1,600 |
|
660 |
|
IB-1 |
267 |
4,860 |
|
|
|
O-44-4 |
3,430 |
|
|
|
|
SK-59C-8 |
795 |
1,010 |
|
|
|
AG-11A |
358 |
|
|
|
|
AG-11B |
7,300 |
|
|
|
|
N-16-6 |
|
|
423 |
1420 |
|
579-12 |
|
|
423 |
420 |
|
779-A-15 |
|
|
608 |
|
|
TYS-1-16 |
|
|
|
710 |
|
TE-4 |
|
|
598 |
|
3. The Broken Hill Pb-Zn-Ag Orebody, Australia,
Precambrian Research, Volume 90 (1998), Pages 203-238
|
238U/206Pb |
238U/206Pb |
238U/206Pb |
238U/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
|
11,444 |
10,086 |
9,911 |
9,783 |
2,929 |
1,643 |
1,618 |
1,597 |
|
11,298 |
10,034 |
9,905 |
9,760 |
2,793 |
1,639 |
1,618 |
1,595 |
|
10,909 |
10,032 |
9,903 |
9,760 |
2,360 |
1,638 |
1,616 |
1,594 |
|
10,754 |
10,032 |
9,895 |
9,747 |
1,920 |
1,638 |
1614 |
1,592 |
|
10,620 |
10,029 |
9,885 |
9,736 |
1,849 |
1,637 |
1,614 |
1,592 |
|
10,475 |
10,021 |
9,881 |
9,730 |
1,807 |
1,636 |
1,614 |
1,591 |
|
10,354 |
10,005 |
9,881 |
9,720 |
1,807 |
1,636 |
1,613 |
1,589 |
|
10,317 |
9,991 |
9,877 |
9,704 |
1,788 |
1,633 |
1,612 |
1,589 |
|
10,308 |
9,986 |
9,857 |
9,592 |
1,777 |
1,631 |
1,610 |
1,588 |
|
10,299 |
9,984 |
9,833 |
9,577 |
1,771 |
1,631 |
1,608 |
1,588 |
|
10,275 |
9,972 |
9,833 |
9,577 |
1,764 |
1,631 |
1,607 |
1,587 |
|
10,249 |
9,965 |
9,828 |
9,555 |
1,746 |
1,630 |
1,604 |
1,582 |
|
10,187 |
9,964 |
9,826 |
9,553 |
1,731 |
1,629 |
1,602 |
1,580 |
|
10,149 |
9,949 |
9,822 |
9,463 |
1,709 |
1,626 |
1,599 |
1,578 |
|
10,135 |
9,946 |
9,821 |
9,365 |
1,695 |
1,625 |
1,599 |
1,576 |
|
10,129 |
9,939 |
9,812 |
9,332 |
1,673 |
1,625 |
1,598 |
1,574 |
|
10,117 |
9,935 |
9,812 |
8,633 |
1,665 |
1,624 |
1,598 |
1,574 |
|
10,112 |
9,934 |
9,807 |
8,013 |
1,662 |
1,621 |
1,598 |
1,569 |
|
10,104 |
9,931 |
9,804 |
7,264 |
1,653 |
1,619 |
1,598 |
1,567 |
|
10,090 |
9,929 |
9,795 |
7,252 |
1,646 |
1,619 |
1597 |
1,528 |
4. Implications for Banda Arc Magma Genesis,
Geochimica et Cosmochimica Acta, 1995, Volume 59, Number 12, Pages 2573-2598
|
207Pb/206Pb |
207Pb/206Pb |
|
4,991 |
4,973 |
|
4,984 |
4,972 |
|
4,982 |
4,971 |
|
4,981 |
4,971 |
|
4,981 |
4,970 |
|
4,980 |
4,969 |
|
4,978 |
4,964 |
|
4,978 |
4,964 |
|
4,977 |
4,963 |
|
4,976 |
4,960 |
|
4,975 |
4,959 |
|
4,974 |
4,953 |
|
4,973 |
4,953 |
|
4,973 |
4,933 |
5. Mineral Age Patterns,
Earth and Planetary Science Letters, 1973, Volume 20, Pages 157 - 170
|
Mineral |
Maximum Age |
Minimum Age |
Difference |
|
Name |
K/Ar |
K/Ar |
K/Ar |
|
Biotite |
3,220 |
1,733 |
1,487 |
|
Biotite |
3,360 |
2,750 |
610 |
|
Biotite |
3,280 |
2,530 |
750 |
|
Hornblende |
3,160 |
1,612 |
1,548 |
|
Biotite |
3,710 |
1,610 |
2,100 |
|
Biotite |
3,165 |
1,890 |
1,275 |
|
Hornblende |
2,620 |
2,380 |
240 |
|
Hornblende |
2,460 |
2,380 |
80 |
|
Hornblende |
3,010 |
1,637 |
1,373 |
|
Biotite |
2,570 |
1,590 |
980 |
|
Hornblende |
2,950 |
2,640 |
310 |
|
Hornblende |
3,200 |
2,350 |
850 |
|
Muscovite |
3,520 |
1,733 |
1,787 |
|
Biotite |
3,440 |
1,616 |
1,824 |
|
Biotite |
5,120 |
1,581 |
3,539 |
|
Biotite |
2,350 |
1,618 |
732 |
|
Biotite |
4,740 |
2,000 |
2,740 |
6. Controlled Leaching Of Monazites,
Journal Of Geophysical Research, 1967, Volume 72, Number 14, Pages 3587, 3588
|
Pb207/Pb206 |
Pb207/U235 |
Pb206/U238 |
Pb208/Th232 |
|
2,010 |
1,640 |
1,360 |
1,180 |
|
2,570 |
2,380 |
2,170 |
2,100 |
|
2,010 |
1,640 |
1,360 |
1,180 |
|
1,170 |
1,420 |
1,590 |
995 |
|
880 |
930 |
950 |
690 |
|
880 |
915 |
930 |
900 |
7. Indosinian Granitoids,
Science in China Series D: Earth Sciences, 2007, Volume 50, Number 7, Pages 972-983
|
207Pb/206Pb |
206Pb/238U |
208Pb/232Th |
|
5,024 |
10,658 |
12,943 |
|
5,021 |
10,805 |
13,658 |
|
5,018 |
10,917 |
22,986 |
|
5,028 |
11,810 |
24,350 |
|
5,017 |
10,552 |
22,649 |
|
5,011 |
7,695 |
13,585 |
|
5,005 |
13,155 |
31,891 |
|
5,015 |
13,173 |
27,272 |
8. Norwegian Caledonides: An isotopic investigation,
Lithos, Volume 117, 2010, Pages 1-19
|
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
87Rb/86Sr |
|
-31,071 |
635 |
1,461 |
1,814 |
2,611 |
|
-20,034 |
686 |
1,464 |
1,842 |
2,630 |
|
-7,491 |
704 |
1,471 |
1,844 |
2,711 |
|
-6,102 |
732 |
1,479 |
1,850 |
2,761 |
|
-2,394 |
820 |
1,482 |
1,859 |
3,242 |
|
-2,184 |
919 |
1,492 |
1,871 |
3,454 |
|
-2,104 |
940 |
1,500 |
1,878 |
3,590 |
|
-1,220 |
940 |
1,515 |
1,884 |
3,663 |
|
-1,201 |
951 |
1,520 |
1,893 |
4,009 |
|
-1,038 |
955 |
1,538 |
1,902 |
4,139 |
|
-836 |
963 |
1,549 |
1,908 |
4,153 |
|
-685 |
971 |
1,549 |
1,912 |
4,318 |
|
-655 |
983 |
1,549 |
1,925 |
4,527 |
|
-546 |
1,020 |
1,559 |
1,958 |
4,580 |
|
-483 |
1,021 |
1,580 |
1,962 |
4,849 |
|
-249 |
1,062 |
1,602 |
1,966 |
4,960 |
|
-200 |
1,077 |
1,606 |
1,971 |
5,525 |
|
-137 |
1,083 |
1,615 |
1,982 |
5,788 |
|
-90 |
1,147 |
1,616 |
2,020 |
6,510 |
|
5 |
1,153 |
1,648 |
2,031 |
6,598 |
|
36 |
1,211 |
1,650 |
2,073 |
7,031 |
|
119 |
1,215 |
1,663 |
2,078 |
7,049 |
|
133 |
1,233 |
1,665 |
2,081 |
7,710 |
|
139 |
1,240 |
1,674 |
2,085 |
7,816 |
|
181 |
1,292 |
1,704 |
2,103 |
9,751 |
|
258 |
1,324 |
1,711 |
2,103 |
9,789 |
|
370 |
1,328 |
1,714 |
2,121 |
13,959 |
|
423 |
1,344 |
1,720 |
2,286 |
17,711 |
|
488 |
1,391 |
1,723 |
2,305 |
18,704 |
|
500 |
1,392 |
1,740 |
2,320 |
38,213 |
|
516 |
1,413 |
1,756 |
2,519 |
40,285 |
|
577 |
1,430 |
1,779 |
2,543 |
64,577 |
|
582 |
1,432 |
1,784 |
2,592 |
76,523 |
|
625 |
1,455 |
1,789 |
2,594 |
76,523 |
9. SHRIMP U-Pb Geochronology,
International Earth Science, 2002, Volume 91, Pages 406-432
|
208Pb/232Th |
207Pb/206Pb |
206Pb/238U |
207Pb/235U |
|
24,344 |
6,495 |
2,941 |
2,940 |
|
8,752 |
5,457 |
2,833 |
2,779 |
|
8,682 |
5,189 |
2,788 |
2,735 |
|
8,597 |
4,639 |
2,775 |
2,731 |
|
8,504 |
3,428 |
2,750 |
2,728 |
|
8,464 |
3,038 |
2,750 |
2,719 |
|
8,337 |
2,940 |
2,725 |
2,698 |
|
8,269 |
2,740 |
2,691 |
2,697 |
|
8,241 |
2,718 |
2,678 |
2,693 |
|
8,194 |
2,709 |
2,678 |
2,669 |
|
7,789 |
2,704 |
2,652 |
2,668 |
|
7,003 |
2,697 |
2,644 |
2,666 |
|
5,171 |
2,696 |
2,233 |
2,419 |
|
622 |
2,694 |
2,081 |
2,349 |
|
264 |
2,684 |
1,056 |
1,191 |
|
215 |
2,683 |
190 |
19 |
|
68 |
2,669 |
112 |
16 |
|
67 |
2,662 |
102 |
12 |
|
62 |
2,592 |
55 |
11 |
|
46 |
2,580 |
53 |
11 |
|
44 |
2,402 |
53 |
10 |
|
35 |
1,926 |
48 |
9 |
|
19 |
1,447 |
46 |
7 |
|
8 |
869 |
45 |
7 |
|
|
|
44 |
6 |
|
|
|
20 |
5 |
|
|
|
18 |
4 |
|
|
|
16 |
3 |
|
|
|
13 |
2 |
|
|
|
5 |
2 |
9. SHRIMP U-Pb Geochronology,
International Earth Science, 2002, Volume 91, Pages 406-432
|
208Pb/232Th |
207Pb/206Pb |
206Pb/238U |
207Pb/235U |
|
23,355 |
2,726 |
3,850 |
3,115 |
|
2,489 |
2,721 |
2,825 |
2,754 |
|
2,430 |
2,710 |
2,804 |
2,733 |
|
212 |
2,706 |
2,800 |
2,732 |
|
170 |
2,703 |
2,762 |
2,730 |
|
163 |
2,695 |
2,750 |
2,724 |
|
156 |
2,694 |
2,741 |
2,722 |
|
145 |
2,690 |
2,725 |
2,700 |
|
132 |
2,682 |
2,712 |
2,698 |
|
126 |
2,677 |
2,703 |
2,695 |
|
113 |
2,670 |
2,699 |
2,685 |
|
108 |
2,670 |
2,691 |
2,683 |
|
94 |
2,664 |
2,648 |
2,675 |
|
93 |
2,661 |
2,631 |
2,668 |
|
56 |
2,651 |
2,558 |
2,618 |
9. SHRIMP U-Pb Geochronology,
International Earth Science, 2002, Volume 91, Pages 406-432
|
208Pb/232Th |
207Pb/206Pb |
206Pb/238U |
207Pb/235U |
|
11,964 |
3,347 |
3,356 |
3,351 |
|
3,122 |
2,825 |
2,716 |
2,728 |
|
2,712 |
2,740 |
2,695 |
2,715 |
|
2,682 |
2,738 |
2,691 |
2,712 |
|
2,667 |
2,737 |
2,674 |
2,712 |
|
2,661 |
2,737 |
2,674 |
2,709 |
|
2,660 |
2,735 |
2,652 |
2,708 |
|
2,652 |
2,732 |
2,652 |
2,703 |
|
2,650 |
2,730 |
2,648 |
2,692 |
|
2,637 |
2,729 |
2,644 |
2,689 |
|
2,623 |
2,728 |
2,644 |
2,680 |
|
2,611 |
2,725 |
2,631 |
2,652 |
|
2,563 |
2,724 |
2,627 |
2,649 |
|
2,545 |
2,723 |
2,622 |
2,649 |
|
2,537 |
2,719 |
2,618 |
2,647 |
|
2,338 |
2,719 |
2,592 |
2,643 |
|
2,262 |
2,717 |
2,584 |
2,642 |
|
2,248 |
2,713 |
2,553 |
2,640 |
|
2,247 |
2,701 |
2,501 |
2,632 |
|
2,223 |
2,699 |
2,479 |
2,604 |
|
2,069 |
2,690 |
2,462 |
2,587 |
|
1,992 |
2,687 |
2,422 |
2,585 |
|
1,903 |
2,686 |
2,297 |
2,577 |
|
1,637 |
2,672 |
1,982 |
2,538 |
|
1,541 |
2,669 |
1,935 |
2,370 |
|
1,288 |
2,669 |
1,896 |
2,339 |
|
1,050 |
2,666 |
1,858 |
2,321 |
|
911 |
2,662 |
1,755 |
2,305 |
|
752 |
2,658 |
1,701 |
2,163 |
|
488 |
2,658 |
1,666 |
2,159 |
|
477 |
2,649 |
1,340 |
1,967 |
|
196 |
2,639 |
1,329 |
1,851 |
|
122 |
2,633 |
1,111 |
1,756 |
|
109 |
2,490 |
788 |
1,483 |
|
16 |
|
39 |
142 |
|
9 |
|
39 |
142 |
|
6 |
|
32 |
142 |
|
4 |
|
32 |
133 |
|
1 |
|
32 |
124 |
|
1 |
|
32 |
124 |
|
0 |
|
13 |
59 |
10. South African Off-Craton Mantle,
Journal of Petrology, 2010, Volume 51, Number 9, Pages 1849-1890
|
187Re/188Os |
187Re/188Os |
187Re/188Os |
187Re/188Os |
187Re/188Os |
|
45,050 |
2,730 |
2,110 |
1,600 |
1,270 |
|
34,970 |
2,730 |
2,090 |
1,570 |
1,260 |
|
27,290 |
2,720 |
2,060 |
1,560 |
1,230 |
|
10,390 |
2,670 |
2,000 |
1,550 |
1,200 |
|
10,210 |
2,660 |
1,980 |
1,550 |
1,190 |
|
8,310 |
2,600 |
1,980 |
1,540 |
1,170 |
|
6,980 |
2,570 |
1,960 |
1,530 |
1,130 |
|
6,710 |
2,560 |
1,960 |
1,530 |
1,120 |
|
6,590 |
2,560 |
1,920 |
1,530 |
1,020 |
|
5,600 |
2,530 |
1,910 |
1,530 |
1,000 |
|
5,550 |
2,510 |
1,880 |
1,510 |
980 |
|
5,390 |
2,480 |
1,860 |
1,490 |
970 |
|
5,330 |
2,410 |
1,820 |
1,480 |
930 |
|
4,490 |
2,410 |
1,810 |
1,480 |
900 |
|
4,310 |
2,400 |
1,770 |
1,480 |
580 |
|
4,030 |
2,400 |
1,730 |
1,460 |
420 |
|
3,950 |
2,370 |
1,730 |
1,450 |
-140 |
|
3,750 |
2,360 |
1,720 |
1,450 |
-1,540 |
|
3,280 |
2,340 |
1,710 |
1,410 |
-1,620 |
|
3,230 |
2,300 |
1,700 |
1,380 |
-4,440 |
|
3,210 |
2,270 |
1,650 |
1,370 |
-4,480 |
|
3,170 |
2,250 |
1,640 |
1,360 |
-5,910 |
|
3,020 |
2,220 |
1,640 |
1,340 |
-6,100 |
|
3,010 |
2,210 |
1,620 |
1,320 |
-10,700 |
|
2,880 |
2,160 |
1,620 |
1,310 |
-13,380 |
|
2,850 |
2,140 |
1,620 |
1,300 |
-14,570 |
|
2,830 |
2,140 |
1,620 |
1,290 |
-33,780 |
|
2,810 |
2,130 |
1,610 |
1,290 |
-76,300 |
|
2,780 |
2,130 |
1,610 |
1,290 |
|
|
187Os/188Os |
187Os/188Os |
187Os/188Os |
187Os/188Os |
|
2,480 |
1,682 |
1,092 |
780 |
|
2,467 |
1,539 |
1,079 |
776 |
|
2,354 |
1,521 |
1,076 |
731 |
|
2,325 |
1,461 |
1,038 |
703 |
|
2,256 |
1,461 |
1,025 |
664 |
|
2,189 |
1,449 |
1,019 |
628 |
|
2,173 |
1,410 |
1,004 |
588 |
|
2,156 |
1,353 |
976 |
555 |
|
2,137 |
1,325 |
973 |
420 |
|
2,115 |
1,285 |
948 |
362 |
|
2,073 |
1,267 |
901 |
346 |
|
2,009 |
1,218 |
896 |
68 |
|
1,963 |
1,212 |
884 |
-70 |
|
1,917 |
1,210 |
865 |
-3,407 |
|
1,829 |
1,181 |
827 |
-5,834 |
|
1,793 |
1,155 |
806 |
-5,877 |
|
1,778 |
1,122 |
796 |
-31,808 |
|
1,734 |
1,107 |
785 |
-56,679 |
11. In Situ Analysis of Sulphides,
Earth and Planetary Science Letters, 2002, Volume 203, Pages 651-663
|
187Os/188Os |
187Re/188Os |
187Re/188Os |
|
2,056 |
2,130 |
3,630 |
|
-497 |
-160 |
850 |
|
-300 |
10 |
-100 |
|
-88 |
210 |
-300 |
|
1,058 |
1,300 |
8,800 |
|
387 |
700 |
-2,350 |
|
1,500 |
1,640 |
1,710 |
|
-513 |
-180 |
-200 |
|
436 |
740 |
790 |
|
2,760 |
2,750 |
8,300 |
|
551 |
790 |
-9,500 |
|
812 |
1,080 |
34,000 |
|
616 |
910 |
-17,400 |
|
1,614 |
1,740 |
3,240 |
|
1,009 |
1,200 |
5,200 |
|
1,091 |
1,330 |
4,350 |
|
2,089 |
2,160 |
2,450 |
|
-7,600 |
-7,060 |
1,160 |
|
-350 |
30 |
50 |
|
187Os/188Os |
187Re/188Os |
187Re/188Os |
|
60 |
340 |
590 |
|
256 |
520 |
560 |
|
-2,248 |
-1,790 |
6,700 |
|
-1,593 |
-1,120 |
-2,000 |
|
1,353 |
1,570 |
2,010 |
|
682 |
970 |
2,390 |
|
1,745 |
1,920 |
2,220 |
|
-333 |
50 |
120 |
|
-1,675 |
-1,200 |
1,200 |
|
-1,381 |
-920 |
3,930 |
|
-1,053 |
-680 |
-830 |
|
-1,397 |
-1,000 |
-1,170 |
|
698 |
920 |
1,930 |
|
-1,053 |
-680 |
-830 |
|
-1,790 |
-1,360 |
-2,080 |
|
1,647 |
1,770 |
7,400 |
|
-251 |
60 |
150 |
|
943 |
1,140 |
3,110 |
|
1,254 |
1,420 |
2,620 |
|
-415 |
-30 |
-50 |
|
551 |
790 |
2,190 |
|
371 |
630 |
1,420 |
|
-1,855 |
-1,420 |
-1,430 |
|
1,549 |
1,680 |
16,000 |
12. Lead Isotopic Study Of Young Volcanic Rocks,
Earth and Planetarv Science Letters, Volume 46 (1980) Pages 221-232
|
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
|
5,239 |
5,009 |
4,999 |
4,984 |
4,955 |
4,919 |
4,899 |
|
5,026 |
5,009 |
4,999 |
4,983 |
4,948 |
4,918 |
4,892 |
|
5,022 |
5,008 |
4,999 |
4,982 |
4,947 |
4,918 |
4,892 |
|
5,021 |
5,008 |
4,998 |
4,981 |
4,945 |
4,918 |
4,890 |
|
5,018 |
5,008 |
4,997 |
4,981 |
4,943 |
4,918 |
4,890 |
|
5,018 |
5,008 |
4,997 |
4,979 |
4,941 |
4,918 |
4,888 |
|
5,017 |
5,007 |
4,997 |
4,977 |
4,940 |
4,917 |
4,885 |
|
5,017 |
5,007 |
4,997 |
4,977 |
4,940 |
4,917 |
4,881 |
|
5,015 |
5,006 |
4,995 |
4,977 |
4,939 |
4,915 |
4,874 |
|
5,014 |
5,006 |
4,994 |
4,976 |
4,939 |
4,915 |
4,867 |
|
5,013 |
5,003 |
4,993 |
4,976 |
4,938 |
4,915 |
4,853 |
|
5,012 |
5,002 |
4,992 |
4,974 |
4,937 |
4,914 |
4,853 |
|
5,012 |
5,002 |
4,992 |
4,973 |
4,935 |
4,913 |
4,850 |
|
5,011 |
5,002 |
4,992 |
4,972 |
4,933 |
4,912 |
4,849 |
|
5,011 |
5,001 |
4,989 |
4,971 |
4,932 |
4,911 |
4,846 |
|
5,011 |
5,001 |
4,988 |
4,969 |
4,932 |
4,910 |
4,846 |
|
5,011 |
5,001 |
4,987 |
4,969 |
4,927 |
4,909 |
4,846 |
|
5,010 |
5,001 |
4,987 |
4,968 |
4,927 |
4,909 |
4,846 |
|
5,010 |
5,000 |
4,986 |
4,967 |
4,925 |
4,907 |
4,845 |
|
5,010 |
5,000 |
4,986 |
4,965 |
4,924 |
4,907 |
4,844 |
|
5,010 |
4,999 |
4,986 |
4,964 |
4,923 |
4,906 |
4,841 |
|
5,010 |
4,999 |
4,985 |
4,963 |
4,923 |
4,905 |
4,840 |
|
5,010 |
4,999 |
4,985 |
4,963 |
4,922 |
4,904 |
|
|
5,009 |
4,999 |
4,985 |
4,962 |
4,921 |
4,902 |
|
|
5,009 |
4,999 |
4,984 |
4,958 |
4,921 |
4,899 |
|
13. Sr-Nd-Pb Isotopic Compositions,
Earth and Planetary Science Letters, Volume 244 (2006) Page 251-269
|
207Pb/206Pb |
207Pb/206Pb |
|
5,446 |
5,384 |
|
5,444 |
5,392 |
|
5,411 |
5,386 |
|
5,458 |
5,386 |
|
5,394 |
5,371 |
|
5,386 |
5,370 |
|
5,392 |
5,369 |
|
5,392 |
5,372 |
|
5,391 |
5,371 |
|
5,403 |
|
14. 190Pt/186Os and 187Re/187Os systematics,
Earth and Planetary Science Letters, Volume 177 (2000) Pages 319-335
|
187Os/188Os |
187Os/188Os |
|
1,782 |
-336 |
|
1,782 |
-337 |
|
1,782 |
-337 |
|
1,781 |
-337 |
|
1,781 |
-340 |
|
1,781 |
-341 |
|
1,780 |
-342 |
|
322 |
-352 |
|
-72 |
-415 |
|
-72 |
-416 |
|
-72 |
-417 |
|
-73 |
-417 |
|
-244 |
-488 |
|
-244 |
-488 |
|
-245 |
-488 |
|
-246 |
-489 |
|
-334 |
|
15. 207Pb/206Pb And 40Ar/39Ar Ages SW Montana,
Precambrian Research, 2002, Volume 117, Pages 119 - 143
|
40Ar/39Ar |
40Ar/39Ar |
207Pb/206Pb |
|
3,842 |
1,740 |
5,049 |
|
1,997 |
1,737 |
5,015 |
|
1,854 |
1,728 |
5,011 |
|
1,854 |
1,717 |
5,005 |
|
1,853 |
1,715 |
4,939 |
|
1,852 |
1,710 |
4,843 |
|
1,852 |
1,695 |
4,805 |
|
1,846 |
1,693 |
4,572 |
|
1,821 |
1,690 |
4,522 |
|
1,819 |
1,687 |
4,471 |
|
1,818 |
1,675 |
4,420 |
|
1,814 |
1,673 |
4,316 |
|
1,813 |
1,673 |
4,235 |
|
1,806 |
1,658 |
4,178 |
|
1,800 |
1,649 |
4,150 |
|
1,798 |
1,639 |
4,042 |
|
1,775 |
1,632 |
3,942 |
|
1,773 |
1,620 |
3,444 |
|
1,772 |
1,604 |
3,228 |
|
1,758 |
1,586 |
2,866 |
|
1,758 |
1,548 |
2,759 |
|
1,748 |
1,547 |
2,733 |
|
1,729 |
1,405 |
2,644 |
|
1,687 |
1,377 |
2,548 |
|
1,668 |
1,375 |
2,138 |
|
1,667 |
1,266 |
1,911 |
|
1,651 |
1,199 |
1,895 |
|
1,456 |
1,056 |
1,848 |
|
482 |
199 |
|
|
119 |
80 |
|
|
107 |
29 |
|
|
80 |
26 |
|
16. Isotopic Discrepancies in Black Hills, South Dakota,
Geochemica Et Cosmochemica Acta, 1970, Volume 34, Pages 713 - 725
|
Table 5. |
|
Rb-Sr Date |
Rb-Sr Date |
|
Sample/Mines |
Mineral Type |
Million Years |
Billion Years |
|
Hugo Mine |
Albite |
7,100 |
7.1 |
|
Hugo Mine |
Montebrasite |
4,700 |
4.7 |
|
Hugo Mine |
Spodumene |
1,500 |
1.5 |
|
Hugo Mine |
Apatite |
900,000 |
900 |
|
Hugo Mine |
Lithiophyllite |
53,000 |
53 |
|
Tin Mountain |
Montebraeite |
36,000 |
36 |
|
Tin Mountain |
Spodumene |
1,400 |
1.4 |
|
Tin Mountain |
Apatite |
75,000 |
75 |
|
Bob Ingersoll Mine |
Montebrasite |
81,000 |
81 |
|
Bob Ingersoll Mine |
Spodumene |
1,800 |
1.8 |
|
Bob Ingersoll Mine |
Apatite |
460,000 |
460 |
17. The Homestake Gold Deposit,
Precambrian Research, Volume 172 (2009), Pages 1–24
|
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
207Pb/206Pb |
|
5,185 |
5,133 |
5,090 |
5,026 |
4,936 |
|
5,184 |
5,132 |
5,090 |
5,025 |
4,929 |
|
5,183 |
5,132 |
5,087 |
5,020 |
4,928 |
|
5,183 |
5,131 |
5,071 |
5,018 |
4,928 |
|
5,175 |
5,125 |
5,070 |
5,012 |
4,926 |
|
5,169 |
5,124 |
5,068 |
5,010 |
4,923 |
|
5,163 |
5,120 |
5,068 |
5,002 |
4,908 |
|
5,162 |
5,120 |
5,067 |
4,999 |
4,883 |
|
5,159 |
5,119 |
5,067 |
4,999 |
4,880 |
|
5,156 |
5,119 |
5,064 |
4,994 |
4,874 |
|
5,149 |
5,117 |
5,060 |
4,977 |
4,858 |
|
5,147 |
5,117 |
5,058 |
4,973 |
4,857 |
|
5,146 |
5,116 |
5,058 |
4,972 |
4,831 |
|
5,146 |
5,113 |
5,057 |
4,965 |
4,830 |
|
5,145 |
5,106 |
5,056 |
4,957 |
4,807 |
|
5,144 |
5,104 |
5,053 |
4,957 |
4,803 |
|
5,143 |
5,101 |
5,050 |
4,955 |
4,796 |
|
5,142 |
5,101 |
5,044 |
4,951 |
4,796 |
|
5,141 |
5,093 |
5,038 |
4,949 |
4,792 |
|
5,138 |
5,090 |
5,027 |
4,941 |
4,791 |
18. The Archean-Proterozoic Boundary,
Precambrian Research, 2007, Volume 157, Pages 80 - 105
|
206Pb/238U |
206Pb/238U |
207Pb/235U |
207Pb/235U |
207Pb/206Pb |
207Pb/206Pb |
|
1,954 |
1,328 |
1,853 |
1,522 |
1,890 |
1,779 |
|
1,840 |
1,318 |
1,804 |
1,500 |
1,890 |
1,779 |
|
1,820 |
1,297 |
1,794 |
1,492 |
1,867 |
1,778 |
|
1,788 |
1,285 |
1,783 |
1,483 |
1,863 |
1,777 |
|
1,779 |
1,282 |
1,778 |
1,481 |
1,850 |
1,776 |
|
1,754 |
1,277 |
1,756 |
1,456 |
1,838 |
1,775 |
|
1,746 |
1,248 |
1,754 |
1,419 |
1,829 |
1,772 |
|
1,731 |
1,186 |
1,750 |
1,416 |
1,828 |
1,771 |
|
1,731 |
1,180 |
1,745 |
1,401 |
1,825 |
1,771 |
|
1,711 |
1,137 |
1,742 |
1,377 |
1,824 |
1,770 |
|
1,709 |
1,121 |
1,741 |
1,346 |
1,822 |
1,769 |
|
1,630 |
1,064 |
1,704 |
1,313 |
1,804 |
1,767 |
|
1,620 |
1,053 |
1,699 |
1,309 |
1,803 |
1,767 |
|
1,604 |
1,019 |
1,698 |
1,283 |
1,803 |
1,765 |
|
1,599 |
935 |
1,698 |
1,243 |
1,800 |
1,763 |
|
1,595 |
905 |
1,692 |
1,234 |
1,795 |
1,762 |
|
1,576 |
892 |
1,691 |
1,154 |
1,791 |
1,759 |
|
1,575 |
857 |
1,689 |
1,136 |
1,791 |
1,758 |
|
1,550 |
828 |
1,664 |
1,130 |
1,783 |
1,755 |
|
1,526 |
776 |
1,634 |
1,084 |
1,782 |
1,755 |
|
1,500 |
718 |
1,614 |
1,034 |
1,782 |
1,741 |
|
1,499 |
666 |
1,590 |
1,012 |
1,782 |
1,740 |
|
1,421 |
580 |
1,582 |
902 |
1,781 |
1,740 |
|
1,418 |
553 |
1,576 |
893 |
1,781 |
1,712 |
|
1,365 |
528 |
1,537 |
838 |
1,780 |
1,634 |
|
1,350 |
515 |
1,526 |
826 |
1,780 |
1,631 |
References
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2. Rb-Sr And Sm-Nd Studies, Chemical Geology, 1985, Volume 52, Pages 249-271
3. The Broken Hill Pb-Zn-Ag Orebody, Australia, Precambrian Research, Volume 90 (1998), Pages 203-238
4. Implications for Banda Arc Magma Genesis, Geochimica et Cosmochimica Acta, 1995, Volume 59, Number 12, Pages 2573-2598
5. Mineral Age Patterns, Earth and Planetary Science Letters, 1973, Volume 20, Pages 157 - 170
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Pages 3587, 3588
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12. Lead Isotopic Study Of Young Volcanic Rocks, Earth and Planetary Science Letters, Volume 46 (1980)
Pages 221-232
13. Sr-Nd-Pb Isotopic Compositions, Earth and Planetary Science Letters, Volume 244 (2006) Page 251-269
14. 190Pt/186Os and 187Re/187Os systematics, Earth and Planetary Science Letters, Volume 177 (2000)
Pages 319-335
15. 207Pb-206Pb And 40Ar-39Ar Ages SW Montana, Precambrian Research, 2002, Volume 117, Pages 119 - 143
16. Isotopic discrepancies in Black Hills, South Dakota, Geochemica Et Cosmochemica Acta, 1970, Volume 34,
Pages 713 - 725
17. The Homestake Gold Deposit, Precambrian Research, Volume 172 (2009) , Pages 1–24
18. The Archean-Proterozoic Boundary, Precambrian Research, 2007, Volume 157, Pages 80 - 105
19. The Pt–Re–Os isotopic systems, Lithos, Volume 82, 2005, Pages 249-272