A PROPOSED FOG DEPOSITION MECHANISM FOR THE FORMATION OF SALT EFFLORESCENCES IN THE MPUMALANGA HIGHVELD, REPUBLIC OF SOUTH AFRICA

摘要

white efflorescences, representing evaporites that coat stubble grass vegetation, were observed in September 1991 on a form in the Ermelo area. Mpumalanga highveld of the Republic of South Africa . Occurences were in irregular patches. Investigation o f the evaporites. By means of X-ray diffraction, differential thermal analysis, scanning electron microscopy with EDX, and chemical analyses revealed the following minerals, presented in order of decreasing abundanced thenardite, bloedite, gypsim and kieserite.