Table 3. Geochemical data for discrete ash* layers.
|
Core,
section,
interval (cm) |
S†
(wt%) |
 34S(  )‡
|
Ni
(ppm)** |
|---|---|---|---|
| 165-998A- | |||
| 13H-3, 25-27 | 0.01 | †† | 187 |
| 13H-5, 118-120 | 0.02 | †† | 90 |
| 14H-6, 16-18 | 0.03 | †† | 134 |
| 20X-2, 9-11 | 0.01 | †† | 9 |
| 20X-CC, 32-33 | 0.01 | †† | 9 |
| 37X-1, 142-144 | 0.03 | †† | 173 |
| 165-998B- | |||
| 1R-7, 51-53 | 1.91(?)‡‡ | †† | 84 |
| 9R-4, 48-50 | 0.02 | †† | 115 |
| 31R-CC, 5-7 | 0.01 | †† | 97 |
| 33R-2, 88-91 | 0.02 | †† | †† |
| 35R-5, 109-111 | 0.33 | †† | 319 |
| 35R-6, 68-71 | 0.18 | †† | 25 |
| 165-999A- | |||
| 17H-4, 112-114 | 1.72 | †† | 514 |
| 20H-2, 142-144 | 1.24 | -30.9*** | 233 |
| 28X-5, 15-18 | 0.61 | -34.9 | 223 |
| 32X-1, 107-109 | 2.26 | -32.9 | 554 |
| 34X-3, 51-54 | 0.80 | -29.2 | 239 |
| 37X-6, 98-100 | 0.51 | -35.4 | 61 |
| 39X-2, 8-11 | 0.37 | -34.6 | 56 |
| 42X-1, 68-70 | 0.07 | †† | 26 |
| 45X-5, 123-125 | 0.27 | -41.4 ††† | 83 |
| 46X-2, 11-13 | 0.06 | †† | 90 |
| 48X-1, 14-16 | 1.68 | †† | †† |
| 58X-5, 57-60 | 0.03 | †† | †† |
| 165-999B- | |||
| 9R-2, 98-102 | 0.08 | †† | 26 |
| 24R-3, 103-107 | 0.10 | †† | 57 |
| 38R-2, 135-137 | 0.02 | †† | †† |
| 165-1000B- | |||
| 6R-4, 143-145 | 0.70 | -26.9 | 153 |
| 11R-1, 142-145 | 0.06 | †† | 6 |
| 21R-4, 43-46 | 0.21 | -27.1 | 3 |
| 165-1001B- | |||
| 31R-5, 37-39 | 0.03 | †† | 74 |
Notes: * = see text for
relevant caveats. †
= total Cr-reducible S; see text for details.
‡ = total Cr-reducible S; relative to CDT standard.
** = complete trace element data and analytical details are
available in Sigurdsson, Leckie, Acton, et al. (1997). †† = data not
available; missing 34S
data reflect small ash samples and/or low S content.
‡‡ = very low Ag2S yield during Cr-reduction for 34S
determination. *** = small sample; acceptable gas yield. ††† = small SO2
yield.