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EDITORIAL: THE BRITISH MICROMOUNT SOCIETY (1981-1996) |
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COPPER MINES OF THE GREAT ORME |
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MINERAL NOTES
John Betterton - Steve Rust - Beryl Taylor |
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COPPER MINERALS FROM LODGE
PARK TRIAL
John Mason - David Green |
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COUNTYBRIDGE QUARRY
Vincent Holyer |
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FRONGOCH
David Green - Steve Rust - John Mason |
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AUSTRALIAN NEWS |
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MINERAL NEWS |

48 pages, 5 colour.
Mineralization at the Great Orme Mines comprises rare galena-chalopyrite veins cutting fine-grained dolostones and extensive saddle dolomite-chalcopyrite-calcite ore infilling void spaces within coarse-grained limestones and dolomitized limestones close to small faults. Extensive supergene alteration of the primary copper ores has produced secondary copper sulphides and oxides together with multiple generations of calcite, limonite and malachite.
Monazite-(Ce) from Croft Gothal mine, Cornwall
John Betterton
Bismoclite a first Cornish occurrence at Croft Gothal mine
Steve Rust
Susannite and Caledonite in situ in Central Wales
Steve Rust
Tenorite from Penberthy Croft mine, Cornwall
John Betterton
Hildagoite and Arsenolite two new occurrences at Penberthy Croft mine,
Cornwall
Steve Rust
Alpine-type Minerals from Bunmahon, Co. Waterford, Ireland
Beryl Taylor
Post mining supergene copper mineralisation discovered in situ at Lodge Park
trial in the Central Wales Orefield has yielded crystalline specimens of brochantite,
connellite, copper, cuprite and langite, in a well-defined sequence of formation.
The occurrence of connellite and euhedral cuprite crystals is unusual for
Central Wales. The sequence of deposition and mineral associations can be
interpreted in terms of a simple geochemical model.
Langite with minor alteration to brochantite, area of photo 12 x 8 mm. Richard Bell collection.
Countybridge Quarry on the Lizard peninsula has produced a suite of minerals
including fine specimens of native copper, a number of secondary copper minerals,
and colourful secondary serpentine

Copper in serpentine, (24 x 36 mm), Vincent Holyer collection.
Frongoch was one of the largest and most important lead-zinc mines in Central Wales. The mining remains, although relatively recent, are of considerable archaeological significance, and the buildings are scheduled as an Ancient Monument. In mineralogical terms, Frongoch has long been known for excellent specimens of brown pyromorphite and cerussite. More recently, detailed study of the mineralogy of dump-altered sulphides has revealed an extensive suite of rare secondary species including bechererite, caledonite, elyite, lanarkite, namuwite, ramsbeckite, schulenbergite, susannite, and several as yet uncharacterised species. This is one of the most extensive suites of secondary minerals known at any mine in Wales, it includes the first British occurrence of bechererite, and the first Welsh occurrence of lanarkite

Transparent brown pyromorphite crystals 4 mm in length.
Steve Rust collection