Pb-isotope evidence for the role of Mesozoic basins in the genesis of mississippi valley-type mineralization in Somerset, UK

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doi: 10.1144/gsjgs.153.5.0673
Authors:Haggerty, R.; Budd, P.; Rohl, B.; Gale, N. H.
Author Affiliations:Primary:
University of Bradford, Department of Archaeological Sciences, West Yorkshire, United Kingdom
Other:
University of Oxford, United Kingdom
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, Vol.153 (Part 5), p.673-676. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1996
Note:In English. 34 refs.; illus., incl. 1 table, geol. sketch map
Summary:The Mendip-Bristol Pb-Zn-Ba vein deposit is hosted in Carboniferous, Permo-Triassic and Jurassic sedimentary rocks. The metal sources involved during mineralization were investigated using Pb-isotope analysis of vein galenas; 206Pb/204Pb values range from 18.311 to 18.594, 207Pb/204Pb values from 15.601 to 15.688 and 208Pb/204Pb values from 38.257 to 38.565. These data indicate three isotopically different mineralizing fluids, which it is suggested reflect fluid expulsion from adjacent Mesozoic sedimentary basins, as a result of overpressuring due to rapid subsidence in the Triassic-Jurassic. [R.A.H.]
Subjects:Alkaline earth metals; Basins; Geochemistry; Isotope ratios; Isotopes; Lead; Lead ores; Metal ores; Metals; Mineral deposits, genesis; Mineralization; Mississippi valley-type deposits; Ore-forming fluids; Pb-206/Pb-204; Radioactive isotopes; Sedimentary basins; Stable isotopes; Subsidence; Zinc ores; England; Europe; Great Britain; Mendip Hills; Somerset England; United Kingdom; Western Europe; Mendip-Bristol veinfield
Coordinates:N505000 N512000 W0021500 W0035000
Abstract Numbers:97M/531
Record ID:1996076117
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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