Kudrinskoye deposit is a bentonite clay deposit located in the Bakhchisarai region of the Republic of Crimea . The field was discovered and explored by Ladan A.N., Lebedinsky V.I. and Kirichenko L.P. in 1972-1976.
| Kudrinskoye field | |
|---|---|
| A country |
|
| Region | Crimea |
| Products | Bentonite clay |
The carbonate deposits of the Upper Cretaceous , which occur obliquely, take part in the structure of the deposit. The most ancient rock layers are exposed in the southeastern part of the deposit and are represented by breccia limestones , interbedded with calcareous marls (undivided sediments of the Upper Turonian and Cognac tiers) with a thickness of 30-35 g. The sediments of the Santonian tier are eroded on them. They are represented by white and light gray marls with interlayers of greenish-gray clay marls with nodules. The thickness of the deposits is 28-37 g. The sediments of the Campanian layer lie on them. To the lower part of this layer, consisting of white chalk-like limestones and marls, the main layer of bentonite with a thickness of 0.15 to 0.7 g belongs.
Kudrinsky bentonite consists of 95-97% of montmorilonite . Clay is finely dispersed, the content of finely pelitic lobes is from 53.95 to 71.6%, coarse-grained from 56.6 to 27.7%, silt - 0.2%, and sandy material is practically absent. According to the composition and content of absorbed cations, the bentonite of the Kudrinskoye deposit is divided into an alkaline-earth variety (Mg2 ++ Ca2 +> Na ++ K +) associated with the emergence of the formation to the surface, and a puddle variety (Na ++ K +> Mg2 ++ Ca2 +), identified only by a depth of more than 12 m. An intermediate alkaline-earth variety with a high Na + content has also been identified. The diffractometric analysis of the clay fraction of bentonite indicates the presence of three varieties of montmorillonite: alkaline and alkaline earth alkaline earth with a high content of Na +. They clearly differ in the magnitude of the reflex. Thermal analysis also confirms the dominance of the montmorilonite clay composition. The high adsorption and ion exchange properties of bentonites are due to the specific structure of the crystal lattice of the mineral, specific surface area, pore size and nature, origin and chemical heterogeneity.
Technical and economic indicators
- The geological reserves of the field are 596 thousand tons.
- Average mineral power: 0.41 g.
- Stripping average power: 23 g.
- Total annual production of bentonite clay in a quarry in 2003: 5000-10000 t