Occurrence of a new sulphate mineral: Ca7Na3K(SO4)9 in the Emet borate deposits, western Anatolia (Turkey)

Authors

  • Javier García-Veigas Serveis Cientificotècnics, Universitat de Barcelona, Carrer de Lluís Solé i Sabaris 1-3,08028 Barcelona, Spain
  • Federico Ortí Departament de Geoquímica, Petrologia i Prospecció Geolgòica, Universitat de Barcelona, Carrer de Martí i Franquès, 08028 Barcelona, Spain
  • Laura Rosell Departament de Geoquímica, Petrologia i Prospecció Geolgòica, Universitat de Barcelona, Carrer de Martí i Franquès, 08028 Barcelona, Spain
  • Ibrahim Gündoğan Dokuz Eylül Üniversitesi, Jeoloji Mühendisliği Bölümü, Tinaztepe Kampüsü, 35160 Buca-Ízmir, Turkey
  • Cahit Helvaci Dokuz Eylül Üniversitesi, Jeoloji Mühendisliği Bölümü, Tinaztepe Kampüsü, 35160 Buca-Ízmir, Turkey

Keywords:

Miocene, K-sulphate, emetite, glauberite, probertite, evaporites

Abstract

Emetite, a new sulphate mineral, Ca7Na3K(SO4)9, has been identified in two boreholes drilled in the Emet borate district (Miocene; western Anatolia, Turkey). The evaporitic succession in these boreholes is mainly formed of a glauberite-probertite alternation. The new mineral always appears as a diagenetic phase consisting of aggregates of tiny (from few mm to tens of mm) crystals that replace glauberite at the top of glauberite units. The replacement was caused by the interaction of glauberite with K-rich interstitial brines, which are more concentrated than those from which glauberite had precipitated.

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Published

2011-02-16

Issue

Vol. 54 No. 4 (2010)

Section

Articles

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