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Carbonates and Evaporites

, Volume 8, Issue 2, pp 149–155 | Cite as

Potash cement in modern and ancient halite beds

  • Xu Zhiqiang
  • John Parnell
Article
  • 57 Downloads

Abstract

The occurrence of a potash salt cement in halite is a newly recognized feature of early (syndepositional) diagenesis of halite. The potash salt cement has been recognized in modern halite of the Qarhan salt lake playa of the Qaidam Basin, NW China, and in ancient halite of the Permian Teesside Group from Boulby, NE England. Syndepositional textures in ancient halite are normally very difficult to determine. The potash salt cement consists of carnallite and sylvite precipitated in dissolution cavities and fractures in halite. In the Boulby deposits, there is evidence for the incongruent dissolution of carnallite to form sylvite, a process which ultimately leads to the complete replacement of carnallite. In the Qarhan salt lake playa, the potash salt cement may have been precipitated through both the cooling of a surfacial residual brine and mixing of calcium chloride brine from deep fault/oil field with the interstitial brine in the halite.

Keywords

Gypsum Halite Evaporite Potash Qaidam Basin 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer 1993

Authors and Affiliations

  • Xu Zhiqiang
    • 1
  • John Parnell
    • 1
  1. 1.School of GeosciencesThe Queen’s University of BelfastBelfastUK

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