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Bevins, R. E. (1985) Pumpellyite-dominated metadomain alteration at Builth Wells, Wales–evidence for a fossil submarine hydrothermal system?. Mineralogical Magazine, 49 (352) 451-456 doi:10.1180/minmag.1985.049.352.15

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Reference TypeJournal (article/letter/editorial)
TitlePumpellyite-dominated metadomain alteration at Builth Wells, Wales–evidence for a fossil submarine hydrothermal system?
JournalMineralogical MagazineISSN0026-461X
AuthorsBevins, R. E.Author
Year1985 (June)Volume49
Issue352
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_49/49-352-451.pdf+
DOIdoi:10.1180/minmag.1985.049.352.15Search in ResearchGate
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Mindat Ref. ID3750Long-form Identifiermindat:1:5:3750:5
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Full ReferenceBevins, R. E. (1985) Pumpellyite-dominated metadomain alteration at Builth Wells, Wales–evidence for a fossil submarine hydrothermal system?. Mineralogical Magazine, 49 (352) 451-456 doi:10.1180/minmag.1985.049.352.15
Plain TextBevins, R. E. (1985) Pumpellyite-dominated metadomain alteration at Builth Wells, Wales–evidence for a fossil submarine hydrothermal system?. Mineralogical Magazine, 49 (352) 451-456 doi:10.1180/minmag.1985.049.352.15
In(1985, June) Mineralogical Magazine Vol. 49 (352) Mineralogical Society
Abstract/NotesAbstractTwo metamorphic alteration styles have been observed in basic lavas and volcaniclastic rocks of the Builth Volcanic Series of Ordovician age exposed at Llanelwedd Quarry, in the Builth lnlier, Wales. The first alteration style is characterized by the development of a mineral assemblage comprising albite+chlorite+ sphene+ pumpellyite ± prehnite ± calcite ± white mica, although original textures are largely preserved. This alteration pattern corresponds with that developed in volcanic and volcaniclastic rocks elsewhere in Wales, and which is attributed to the effects of burial. The second alteration style is characterized by the development of metadomains dominated by pumpellyite or, more rarely, prehnite. In the metadomains no original textures are seen in hand specimen. This alteration pattern has, so far, not been observed elsewhere in Wales, and it is here suggested that it might result from a submarine hydrothermal circulation system.

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Bevins, R. E. (1978) Pumpellyite-bearing basic igneous rocks from the Lower Ordovician of North Pembrokeshire, Wales. Mineralogical Magazine, 42 (321) 81-83 doi:10.1180/minmag.1978.042.321.10
Douglas McDowell, S., Paces, James B. (1985) Carbonate alteration minerals in the Salton Sea geothermal system California, USA. Mineralogical Magazine, 49 (352) 469-479 doi:10.1180/minmag.1985.049.352.17
Bevins, Richard E., Alderton, David H. M., Horák, Jana M. (1988) Lead-Antimony Mineralization at Bwlch Mine, Deganwy, Wales. Mineralogical Magazine, 52 (366) 391-394 doi:10.1180/minmag.1988.052.366.11
Merriman, R. J., Roberts, B. (1985) A survey of white mica crystallinity and polytypes in pelitic rocks of Snowdonia and Llŷn, North Wales. Mineralogical Magazine, 49 (352) 305-319 doi:10.1180/minmag.1985.049.352.02
Offler, R., Prendergast, E. (1985) Significance of illite crystallinity and bo values of K-white mica in lowgrade metamorphic rocks, North Hill End Synclinorium, New South Wales, Australia. Mineralogical Magazine, 49 (352) 357-364 doi:10.1180/minmag.1985.049.352.06
Metcalfe, R., Banks, D., Bottrell, S.H. (1992) An association between organic matter and localised, prehnite-pumpellyite alteration, at Builth Wells, Wales, U.K. Chemical Geology, 102 (1) 1-21 doi:10.1016/0009-2541(92)90143-s
Robinson, D. (1985) Diagenesis and Low-Temperature Metamorphism–Introduction. Mineralogical Magazine, 49 (352) 301-303 doi:10.1180/minmag.1985.049.352.01
Bevins, Richard E., Turgoose, Stephen, Williams, Peter A. (1982) Namuwite, (Zn,Cu)4SO4(OH)6.4H2O, a new mineral from Wales. Mineralogical Magazine, 46 (338) 51-54 doi:10.1180/minmag.1982.046.338.09
Schiffman, Peter, Bird, Dennis K., Elders, Wilfred A. (1985) Hydrothermal mineralogy of calcareous sandstones from the Colorado River delta in the Cerro Prieto geothermal system, Baja California, Mexico. Mineralogical Magazine, 49 (352) 435-449 doi:10.1180/minmag.1985.049.352.14
Thomas, L. J., Harmon, R. S., Oliver, G. J. H. (1985) Stable isotope compositions of alteration fluids in low-grade Lower Palaeozoic rocks, English Lake District. Mineralogical Magazine, 49 (352) 425-434 doi:10.1180/minmag.1985.049.352.13
Eugster, Hans P. (1985) Granites and hydrothermal ore deposits: a geochemical framework. Mineralogical Magazine, 49 (350) 7-23 doi:10.1180/minmag.1985.049.350.02
 
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