Margasmiltė Ltd was established on Aug 16, 2007. The Company is carrying out its activities in the fields of search, mining and processing for natural resources. At the time being, our Company is working on a project that is unique in Lithuania and the entire Eastern Europe. The project concerns exploitation of Pagiriai anhydrite deposit in the way of mining, i.e. over-ground transport terminal, warehouses, mine, and over-ground administrative building with car parking area. Margasmiltė Ltd has the right to develop an underground mine in Pagiriai, Kaunas region, Lithuania, where a deposit of anhydrite (calcium sulphate) lies 300 m under the surface. Total deposit area is 230 ha.
Geological survey, Environmental Impact Assessment, and Detailed Territory Plan have been performed by Margasmiltė Ltd and approved by relevant authorities, granting the permit to the Company to exploit the deposit. The exploitation of resources is forecasted for at least 100 years.
The key characteristics of the deposit
- Resources and reserves: the total estimated anhydrite resource exceeds 230 Mtons. The extractable – or economically recoverable portion of the resource – anhydrite reserve is min. 80 Mtons, based on the preliminary chamber concept.
- Anhydrite grade is extraordinary high – the purity is above 97%.
- Gypsum and anhydrite stratum varies from 38 to 45 m within the deposit boundaries; the average thickness is 40.8 m.
- Cover layer has a thickness of 290-303 m and it is consisting of clay, sand and moraine, while the bottom layer beneath the gypsum/anhydrite stratum is mainly dolomite.
- The layer is divided into seams: upper gypsum – upper gypsum/anhydrite – banded anhydrite – spotty anhydrite – lower gypsum/anhydrite. The color varies from pale grey or brown to dark blue.
- The Pre-feasibility Study summarizes extensively the state-of-the-art of the history and geological information gathered in the course of the project. The report is supplemented by a plenty of special investigations, like conceptual underground mine design, over ground facilities and infrastructures, as well as market surveys focusing on special issues like use of Pagiriai anhydrite as dimensional stones.
Anhydrite (syn. angelite, alabaster) is a mineral used for diverse applications. Anhydrite can be substituted for gypsum in some of its uses. Both minerals are crushed for use as a soil treatment – as a fertilizer and soil conditioner – and in this purpose anhydrite is superior. One ton of anhydrite has more calcium than one ton of gypsum – because gypsum is about 21% water by weight. This yields more calcium per ton in a soil application. Anhydrite also has a higher solubility which helps it benefit the soil quickly.
In building materials industry, anhydrite has multiple applications. The most important ones are:
- Prefabricated products like wallboards;
- An additive in cement production to retard the setting time (up to 5% grinded with cement clinker);
- An additive especially in super-sulphate cement;
- Substitute for gypsum pozzolana cement;
- Binder for self-levelling floors;
- Mineral filler for joint compounds;
- As drying agents in plaster, paint and varnish;
- Aggregate for road construction, ballast and concrete production;
- As a decorative marble-like dimensional stone, as a collectors’ gemstone, as a stone for jewelry.
Anhydrite has also been used as:
- A source of sulphur in the production of sulphuric acid;
- Inert white filler in rubber, artificial leather and paper production.