The first cave occurence of jurbanite [ AI (OH SO4)? 5h20], associated with Alunogen [ AI2 (SO4) 3? 17h 20] and Tschermigite [ NH4AI(SO4)? 12h 20] : Thermal-sulfidic serpents cave, France - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Cave and Karst Studies Année : 2007

The first cave occurence of jurbanite [ AI (OH SO4)? 5h20], associated with Alunogen [ AI2 (SO4) 3? 17h 20] and Tschermigite [ NH4AI(SO4)? 12h 20] : Thermal-sulfidic serpents cave, France

Philippe Audra
  • Fonction : Auteur

Résumé

Serpents Cave, located in the French Alps, contains a sulfidic-thermal (41 uC) karst spring. Degassing of the sulfidic vapor produces diverse sulfate minerals. The reaction with the limestone host-rock produces gypsum, anhydrite, sulfur, and magnesium calcite. The reaction with an artificial material (aluminum door) produces alunogen, tschermigite, and jurbanite. Microbial activity is suspected in the genesis of sulfur and tschermigite. Aluminum sulfates have usually been reported in mines, in volcanic settings, and in rock-shelters in phyllites. Some of these alum minerals such as tschermigite are rarely observed in caves, and jurbanite is identified here for the first time in a cave. Serpents Cave is therefore an important site for sulfate minerals in caves, even if the aluminum sulfates should be considered border minerals because they originate from sulfur vapor reaction with artificial media.
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Dates et versions

halsde-00362532 , version 1 (18-02-2009)

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  • HAL Id : halsde-00362532 , version 1

Citer

Philippe Audra, Fabien Hoblea. The first cave occurence of jurbanite [ AI (OH SO4)? 5h20], associated with Alunogen [ AI2 (SO4) 3? 17h 20] and Tschermigite [ NH4AI(SO4)? 12h 20] : Thermal-sulfidic serpents cave, France. Journal of Cave and Karst Studies, 2007, 69 (2), pp.243-249. ⟨halsde-00362532⟩
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