Ion probe δ14S study of small scale variations in a hydrothermal chimney, East Pacific Rise at 21°N

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Authors:Chaussidon, Marc; Albarède, Francis; Sheppard, Simon M. F.
Author Affiliations:Primary:
CRPG-ENSG, Nancy, France
Other:
Université de Nancy I, France
Volume Title:Source, transport and deposition of metals
Volume Authors:Pagel, Maurice, editor; Leroy, Jacques L.
Source:p.609-614; 25th anniversary meeting of the Society for Geology Applied to Mineral Deposits, Nancy, France, Aug. 30-Sept. 3, 1991, edited by Maurice Pagel and Jacques L. Leroy. Publisher: A. A. Balkema, Rotterdam, Netherlands
Publication Date:1991
Note:In English. 22 refs.; illus. incl. 2 tables, sketch map
Summary:Small scale (approx 60 mu m) delta34S variations, between -1.0 and +7.1 per mille, have been measured by ion microprobe in one hydrothermal chimney from the EPR at 21 degrees N. Both the outer rim (limit between the chalcopyrite and bornite zones) and the inner part of the chimney are enriched in 34S. These zones also have the highest Se contents (<= 2000 ppm). The correlated delta34S and Se variations reflect incorporation in the sulphides of variable amounts of locally derived sea-water S. Changes in T and variable amounts of sulphate reduction are thought to be the dominant processes controlling the delta34S variations of the chimney, rather than variations in 34S or Se contents of vent fluids. [R.E.S.]
Subjects:Chimneys; Economic geology; Hydrothermal alteration; Isotopes; Metasomatism; S-34/S-32; Sea water; Stable isotopes; Sulfur; Sulfur deposits; East Pacific; East Pacific Rise; Pacific Ocean; Hydrothermal processes; Ratios
Abstract Numbers:93M/384
Record ID:1992080230
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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