Analysis of reduced sulfur species in inclusion fluids

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doi: 10.2113/gsecongeo.84.4.940
Authors:Bottrell, S. H.; Miller, M. F.
Author Affiliations:Primary:
Univ. Leeds, Dep. Earth Sci., Leeds, United Kingdom
Br. Geol. Surv., United Kingdom
Volume Title:Economic Geology and the Bulletin of the Society of Economic Geologists
Source:Economic Geology and the Bulletin of the Society of Economic Geologists, 84(4), p.940-945. Publisher: Economic Geology Publishing Company, Lancaster, PA, United States. ISSN: 0361-0128
Publication Date:1989
Note:In English. 15 refs.; illus. incl. 4 tables
Summary:A method for the determination of reduced sulfur species in inclusion fluids is described. Inclusion fluids are released by decrepitation in a nitrogen stream, the sulfur species are trapped in a 0.1 M NaOH solution and subsequently determined fluorometrically. Method blanks are low (ca. 3 ng S) compared to yields from vein quartz samples (80-6,700 ng S); the detection limit for reduced S is effectively set by this blank and corresponds to ca. 20 ppm S in the original inclusion fluid for a typical 0.5-g sample yielding a total of 1 mg of volatiles. The method is sensitive to S present as H2S or COS but not CS2 or SO2.Analyses of inclusion fluids from unmineralized feeder veins in the Dolgellau gold belt, north Wales, indicate that Au(HS)-2 predominated over AuCl-2 as the major gold-transporting complex. [P.E.B.]
Subjects:Decrepitation; Errors; Experimental studies; Fluid inclusions; Geochemistry; Inclusions; Quartz veins; Reduction; Sample preparation; Sulfur; Veins; Volatiles; Europe; Great Britain; United Kingdom; Wales; Western Europe; Dolgellau gold belt
Abstract Numbers:90M/3064
Record ID:1989071335
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists
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