Mineralization at the Great Orme
Copper Mines, Llandudno, North Wales
Rob Ixer
John Davies
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.

Mineral Notes
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

Supergene copper mineralisation
in situ at Lodge Park Copper Trial, Dyfed
John S. Mason
David I. Green
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. Photo: David Green.

The minerals of Countybridge Quarry,
Goonhilly Downs, The Lizard, Cornwall
Rev. Vincent Holyer
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. Photo: David Green.

Classic British Mineral Localities:
Frongoch Mine, Dyfed
David I. Green
Steve A. Rust
John S. Mason
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. Photo: David
Green.

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