, 2 standard deviations]Table 9. Strontium, neodymium, and lead isotopic compositions of the 1991 Mount Pinatubo rocks and phenocrysts.
[ID, isotopic dilution; XRF, X-ray fluorescence; 2, 2 standard deviations]
|
Sample |
Rb |
Sr |
87Sr/86Sr |
2 |
143Nd/144Nd |
2 |
Pb |
Pb |
206Pb/204Pb |
2 |
207Pb/204Pb |
2 |
208Pb/204Pb |
2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
||||||||||||||
|
Pin4 dacite |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whole-rock |
37 |
565 |
0.704206 |
7 |
0.512915 |
22 |
9 |
9.9 |
18.430 |
13 |
15.598 |
14 |
38.623 |
39 |
|
Anhydrite |
|
|
.704214 |
34 |
|
|
|
|
|
|
|
|
|
|
|
Double leached |
|
|
.704202 |
6 |
.512910 |
13 |
5.3 |
7.2 |
18.440 |
16 |
15.608 |
20 |
38.628 |
45 |
|
Pin6 andesite |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whole-rock |
34 |
490 |
.704194 |
5 |
.512924 |
8 |
7.1 |
5.5 |
18.426 |
14 |
15.584 |
15 |
38.586 |
42 |
|
Anhydrite |
|
|
.704201 |
20 |
|
|
|
|
|
|
|
|
|
|
|
Pin7 dacite |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whole-rock |
38 |
562 |
.704225 |
5 |
.512914 |
17 |
8.8 |
11 |
18.435 |
15 |
15.594 |
17 |
38.612 |
42 |
|
Anhydrite |
|
|
.704201 |
15 |
|
|
|
|
|
|
|
|
|
|
|
Pt53 basalt |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whole-rock |
|
|
.704330 |
7 |
.512786 |
8 |
6.3 |
8 |
18.482 |
15 |
15.621 |
14 |
38.719 |
39 |
|
Pt29 dacite |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whole-rock |
|
|
.70422 |
1 |
.512863 |
11 |
|
|
|
|
|
|
|
|
|
Amphibole |
|
|
.70433 |
3 |
.512903 |
5 |
|
|
|
|
|
|
|
|
|
Plagioclase |
|
|
.70420 |
1 |
.512864 |
11 |
|
|
|
|
|
|
|
|
|
Leachate |
|
|
.70421 |
3 |
|
|
|
|
|
|
|
|
|
|
|
Pt25 dacite |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whole-rock |
|
|
.70425 |
1 |
.512891 |
4 |
|
|
|
|
|
|
|
|
|
Amphibole |
|
|
.70419 |
3 |
.51298 |
1 |
|
|
|
|
|
|
|
|
|
Plagioclase |
|
|
.70422 |
1 |
.51290 |
6 |
|
|
|
|
|
|
|
|
|
Pt12 dacite |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Whole-rock |
|
|
.70422 |
1 |
.512901 |
8 |
|
|
|
|
|
|
|
|
This page is <https://pubs.usgs.gov/pinatubo/bernard/table9.html>
Contact: Chris Newhall
Last updated 03.29.99