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Geotechnical characterization of sulfur species in UK Jurassic mudrocks

Thomas W. St. John
Geotechnical characterization of sulfur species in UK Jurassic mudrocks
Quarterly Journal of Engineering Geology and Hydrogeology (November 2020) 53 (4): 598-608

Abstract

Weathering of pyritic mudrocks results in the oxidation of sulfides and generation of sulfates in concentrations potentially hazardous to civil engineering works. Geochemical and petrographic analyses undertaken on samples from sites underlain by the Kimmeridge Clay Formation and Oxford Clay Formation proved three distinct zones: an upper sulfur-leached zone, an intermediate weathered zone with sulfate-rich horizons and a lower relatively unweathered zone of low-sulfate, high-sulfide material. It was found that water-soluble sulfate and total potential sulfate may vary by up to 1500 mg SO (sub 4) (super 2-) l (super -1) and 8% SO (sub 4) (super 2-) respectively, over a depth interval of only 0.2 m. A targeted sampling strategy and ground aggressivity assessment approach can be applied to these formations based upon the sulfur species zones identified.


ISSN: 1470-9236
EISSN: 2041-4803
Serial Title: Quarterly Journal of Engineering Geology and Hydrogeology
Serial Volume: 53
Serial Issue: 4
Title: Geotechnical characterization of sulfur species in UK Jurassic mudrocks
Author(s): St. John, Thomas W.
Affiliation: University of Bristol, School of Earth Sciences, Bristol, United Kingdom
Pages: 598-608
Published: 202011
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 47
Accession Number: 2021-010022
Categories: Engineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables, geol. sketch maps
N51°00'00" - N51°40'00", W02°19'60" - W01°30'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 202103
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