Permo–Triassic unconformity-related Au-Pd mineralisation, South Devon, UK: new insights and the European perspective

Permo–Triassic unconformity-related Au-Pd mineralisation, South Devon, UK: new insights and the European perspective

An integrated mineralogical-geochemical study of unconformity-related Au-Pd occurrences within and around the Permo-Triassic basins of southwest England, UK, has confirmed the importance of low temperature (86±13°C), hydrothermal carbonate veins as hosts for the mineralisation. Fluid inclusion data...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Mineralium deposita 2005-07, Vol.40 (1), p.24-44
Hauptverfasser: Shepherd, Tom J., Bouch, Jon E., Gunn, Andrew G., McKervey, John A., Naden, Jonathan, Scrivener, Richard C., Styles, Michael T., Large, Duncan E.
Format: Artikel
Sprache:eng
Schlagworte:
Brines
Calcite
Geochemistry
Geology
Leaching
Low temperature
Manganese
Manganese oxides
Mineralization
Mineralogy
Minerals
Salinity
Sodium chloride
Stable isotopes
Sulfides
Triassic
Unconformity
Volcanic rocks
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:An integrated mineralogical-geochemical study of unconformity-related Au-Pd occurrences within and around the Permo-Triassic basins of southwest England, UK, has confirmed the importance of low temperature (86±13°C), hydrothermal carbonate veins as hosts for the mineralisation. Fluid inclusion data for the carbonate gangue, supported by stable isotope (^sup 13^C and ^sup 18^O) and radiogenic (^sup 87^Sr/^sup 86^Sr) data, have identified three principal fluids: (1) a reducing calcic brine [>25 wt% salinity, 0.9 NaCl/(NaCl+CaCl^sub 2^)] originating in the post-unconformity red beds under evaporitic conditions, and (3) an oxygenated, low salinity groundwater (
ISSN:0026-4598
1432-1866
DOI:10.1007/s00126-004-0459-3