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La Creusa U prospect (La Creusaz U prospect), Les Marécottes, Le Trient Valley, Wallis (Valais), Switzerland

Latitude: 46°7'12"N
Longitude: 7°0'5"E
Indice d'uranium de La Creusa (La Creusaz), Les Marécottes, Val du Trient, Valais (Wallis), Suisse (Schweiz; Svizzera)

A series of pitchblende veins occurring at the contact between the Vallorcine granite and adjacent gneisses, close to the last hair-pin bend of the road leading up to La Creusaz. Several of the veins were uncovered and trenched during the 1970's, and an extensive exploration gallery was excavated.

Mineral List

Anatase
Arsenopyrite
Arsenuranospathite
Bassetite
Becquerelite
Billietite
Bismuth
Bismuthinite
Bursaite
Calcite
Cerussite
Chalcopyrite
'Chlorite Group'
Clinochlore
Coffinite
Compreignacite ?
Copper
Dewindtite
Fourmarierite
Françoisite-(Ce) (TL)
Galena
Goethite
Gypsum
Hematite
Jáchymovite
Jarosite
Johannite
Kasolite
Ktenasite
Laitakarite
Lepidocrocite
Malachite
Marcasite
Marécottite (TL)
Marthozite
Masuyite
Metakahlerite
Metatorbernite
Nováčekite-I
Phuralumite ?
Plumbojarosite
Pseudojohannite
Pyrite
Quartz
Rabejacite
Rutile
Siderite
Sklodowskite
Sphalerite
Uraninite
var: Pitchblende
Uranophane
Uranopilite
Uranospinite
Vandendriesscheite
Weibullite
Wittite
Zeunerite
Zippeite


59 entries listed. 55 valid minerals. 2 type localities (valid minerals).

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References

- Meisser, N., Brugger, J., and Lahaye, Y. (2002): Mineralogy and acid-mine drainage of La Creusaz uranium prospect, Switzerland. In B. Kríbek and J. Zeeman, Eds., Uranium Deposits: 147-150. Czech Geological Survey, Prague.
- Pfeifer, H.-R., et al. (1994): Uranium-enrichment in soils and plants in the vicinity of a pitchblende vein at La Creusaz/Les Marécottes (W of Martigny, Valais, Switzerland). Eclogae geol. Helv. 87/2, 491-501.

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