Gypsum in Bundelkhand Region
Geological Survey of India
Gypsum (CaSO4‐2H2O) is hydrated calcium sulphate occurring in
nature in different forms. It is a common evaporite and
fertilisermineral.Occurrence of gypsum has been reported from different parts of
near villages Gonti, Gokhal, Dhanaura, Parsua, Malehta in Jhansi and
Puraini,Parcha in Hamirpur district (Kothiyal, 2002).Gaur (2003) studied the
occurrence of gypsum (selenite) from the BandaAlluvium of Quaternary age in the
northern fringe of the Bundelkhand Craton near village Gonti and Malehta, in
Jhansi District. The area is characterised by shallow soil profile of Banda
Alluvium which is developed over the basement of Bundelkhand Granitoid Complex (BGC).
Banda Alluvium, in this area, is composed of yellow clay,brown coloured silty
sand, sandy silt with kankar, grey silt, light brown sandy silt and light grey
silty clay. Gypsum occurs as disseminated, loose and free‐growing crystals in
clay beds within the Banda Alluvium, exposed along the right bank of Betwa
river. The size of the crystalsrange from less than a mm to more than 10 cms
The bulk soil sample consisting of clay and very small (lessthan
0.5 cm) crystals of gypsum (Photo‐1) from the area was analysed at Chemical
Laboratory, GSI, NR, Lucknow and it was found to contain Cao‐11.2%, SO3‐ ‐6.68%,
Fe2O3‐4.8% and SiO2‐46.02% indicating about 14% gypsum. The XRD analysis (Min.
Physics Division, GSI, NR, Lucknow) shows that the selenite crystals have more
than 99% CaSO4.2H2O.
The gypsum is an important fertiliser mineral. The find of gypsum in the area
opens a new dimension for the mineral investigation, Quaternary
geological‐geo‐environmental studies in the area.
Courtesy : Geological Survey of India