Table 11. Sulfur isotopic compositions of dacite, andesite, and ash samples from Mount Pinatubo.
[Dacite I = phenocryst rich; dacite II = phenocryst poor; FR = fresh ash fall, July 4, 1991]
|
|
Whole rock |
Soluble sulfate |
Insoluble |
|---|---|---|---|
|
PT9B dacite II |
11.67 |
12.21 |
8.23 |
|
PT14 dacite I |
8.53 |
-- |
-- |
|
PT15 dacite I |
7.85 |
8.72 |
-- |
|
PT32 dacite I |
8.50 |
-- |
-- |
|
Pin3 dacite I |
-- |
7.1 |
-- |
|
Pin7 dacite I |
-- |
6.9 |
-- |
|
Pin4 dacite I |
-- |
7.0 |
-- |
|
Pin6 andesite |
-- |
6.3 |
-- |
|
FR11 |
-- |
9.4 |
-- |
|
FR9 |
-- |
9.7 |
-- |
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Contact: Chris Newhall
Last updated 03.29.99