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Sulphur isotope variations in diagenetic pyrite from core plug to sub-millimetre scales

McConville, P., Boyce, A.J., Fallick, A.E., Harte, B., and Scott, E.M. (2000) Sulphur isotope variations in diagenetic pyrite from core plug to sub-millimetre scales. Clay Minerals, 35 (1). pp. 303-311. ISSN 0009-8558 (doi:10.1180/000985500546675)

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Publisher's URL: http://dx.doi.org/10.1180/000985500546675

Abstract

Sulphur isotope ratio measurements (delta(34)S) of diagenetic pyrite an commonly used to identify S sources and mechanisms of sulphide formation in basinal sediments. This study reports: such data For a diagenetic pyrite nodule from the Brent Group sandstones of the northern North Sea at three sampling scales: 50 cm (core subsample), 500 mu m (laser microprobe) and 50 mu m (ion microprobe), Similar delta(34)S variations are found by the laser and ion microprobe techniques. There is a very wide range in delta(34)S ( lt -10 parts per thousand to gt +500 parts per thousand) within the nodule and isotopically heavy S (delta(34)S gt +20 parts per thousand) is common at all scales. The nodule delta(34)S distribution does not fit a Rayleigh fractionation pattern. The laser microprobe sampling at 100-500 mu m scales seems to be adequate to characterize S isotope variations in this material.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Fallick, Prof Anthony and Boyce, Prof Adrian
Authors: McConville, P., Boyce, A.J., Fallick, A.E., Harte, B., and Scott, E.M.
Subjects:Q Science > QE Geology
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Clay Minerals
ISSN:0009-8558

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