Dear colleagues,
According to various reference books, delafossite occurs principally as a
secondary mineral near the base of the oxidised zone of copper deposits,
less commonly as a primary mineral.
(Anthony et al., 1997).
Notable localities include:
Eureka and Kimberly, Nevada, USA
Pope-Shenon mine, Idaho, USA
Bisbee, Arizona, USA
Nizni-Tagil, Ural, Russia
Cartagenera mine, Pedroso, Seville, Spain
Tolvaddon mine, Marazion, Cornwall, UK
Pfaffenreuth and Waldsassen, Bavaria, Germany
Mina Remolinos Nuevo, Atacama, Chile
Ojuela mine, Mexico
Malanjkhand mine, Madhya Pradesh, India
,./
Chris Stanley
,./
At 18:27 17/04/00 +1000, you wrote:
>Dear All
>
>My colleague Bear McPhail and I have been conducting geochemical modelling
>of saline oxidised fluids, such as those which were involved in the
>production of some iron-oxide copper-gold deposits. We have found in several
>simulations that delafossite (copper oxide) is a stable phase under
>conditions we feel to be appropriate.
>
>What I would ask is: does anybody have knowledge of delafossite ocurring as
>a primary hydrothermal precipitate in copper deposits?
>
>Dr Andy Wilde
>Consulting Geologist
>GeoDiscovery Group & Monash University
>B/H: 613-9878-2710
>Fax: 613-9878-2744
>[log in to unmask]
>
>
>
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Chris J Stanley BSc PhD MIMM CGeol F.Min.Soc. FGS,
Deputy Head of Department of Mineralogy
Natural History Museum, Cromwell Road, LONDON SW7 5BD,UK
Tel. +44 207 942 5627 Fax. +44 207 942 5537
Museum web site at: http://www.nhm.ac.uk
Personal Web site at: http://www.nhm.ac.uk/mineralogy/stanley/stanley.htm
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