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


Garcia-Veigas J., Orti F., Rosell L., Gundogan I., Helvaci C.

GEOLOGICAL QUARTERLY, vol.54, no.4, pp.431-437, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 54 Issue: 4
  • Publication Date: 2010
  • Journal Name: GEOLOGICAL QUARTERLY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.431-437
  • Keywords: Miocene, K-sulphate, emetite, glauberite, probertite, evaporites, KUTAHYA, WATERS
  • Dokuz Eylül University Affiliated: Yes

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 mu m to tens of mu m) 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.