Geology of gypsum and anhydrite

Pure dissolution kinetics of anhydrite and gypsum in inhibiting aqueous salt solutions

In the context of the study of the wet creep of plasterboards, we have performed digital holographic interferometry measurements of the dissolution of gypsum of various quarries in water and in aqueous solutions of salts inhibiting dissolution, and of the dissolution of anhydrite in water. This technique is carried out in still water and permits to observe directly the reacting solid-liquid int...

Experimental Shock Transformation of Gypsum to Anhydrite: a New Low Pressure Regime Shock Indicator

Textural pattern of secondary gypsum in the Basal Anhydrite of the Asmari Formation, SW Iran

The Oligocene–Miocene deposits of the Asmari Formation are located in SW of the Zagros Mountains of Iran. The lower part of the Asmari Formation consists of an evaporite bed that is termed Basal Anhydrite. Seven sections from four different anticlines were selected and sampled for petrographic and mineralogical analyses .The petrographical examinations were carried out using an optical polarize...

Rapid Titrimetric Determination of Sulfate in Mixtures of Gypsum, Anhydrite, Calcium Oxide, and Calcium Sulfide Using Ion Exchange

The conventicnal sulfate determination by gravimetrically precipitating barium sulfate is very tedious and time consuming. The present technique uses an ion exchanger so the sulfate can be titrimetrically determined as sulfuric acid. An analysis can be completed in 30 minutes. This method is being used for the routine analysis of sulfate in mixtures of gypsum, anhydrite, calcium oxide, and calc...

Geology and geomorphology of Turkmenistan: A review

This article provides a background for scientists interested in a general overview of the geology and geomorphology of Turkmenistan. The basement of Turkmenistan is a complex amalgamation of arc-related terranes developed in the Asiatic and northern Paleotethys oceanic domains during Late Paleozoic to Triassic times. A major part of the country coincides with the Turan Platform, where a thick s...