Cinovec is a granite-hosted tintungsten-lithium deposit.

Late Variscan age, post-orogenic granite intrusion tin and tungsten occur in oxide minerals (cassiterite and wolframite). Lithium occurs in zinnwaldite, a Li-rich muscovite.

Mineralization in a small granite cupola. Vein and greisen type. Alteration is greisenisation, silicification.

The Cinovec Deposit strikes northsouth, is elongated, and dips gently south parallel to the upper granite contact. The surface projection of mineralization is about 1km long and 900m wide.

Mineralization extends from about 200m to 500m below surface.

Country rocks in the Cinovec area comprise Proterozoic metamorphic complex muscovite-biotite orthogneiss and paragneiss, Lower Palaeozoic phyllite and epiamphibolite and partly migmatised muscovite-biotite paragneiss. These sequences are overlain and cut by the Teplice Rhyolite, composed of extrusive and partially intrusive rhyolite, dacite and ignimbrite and associated tuff with arkosic and Mid-Carboniferous coal interbeds. A thick north-south trending dyke of syenogranite porphyry up to 2km wide intrudes along or near the contact between the eastern gneisses and the Teplice Rhyolite; smaller dykes and masses are found elsewhere within the Teplice Rhyolite and basement rocks.

Cinovec is a greisen deposit.

The Cinovec tin-tungsten-lithium deposit is intimately associated with the cupola of the CinovecZinnwald granite, ........

Around 2.25 million tonnes of ore per annum is mined and crushed in the underground mine prior to being conveyed 1,167m to the mine portal and stacked on Comminution Plant stockpile (30 kt live capacity), providing a buffer and surge capacity between the underground activities and the processing plants.

The 2022 updated Preliminary Feasibility Study establishes that it is feasible and economic to mine using long hole open stoping with paste backfill.

The mine will be accessed by a twin decline system. A decline conveyor will be installed from the underground primary crusher, on 540masl elevation, to surface. The second decline, in parallel with and the same length as the first, will be used as a service decline for mineworkers, material and as an intake airway. A provision for a second crushing station servicing the northern zones has also been made.

Support requirements for non-stoping areas including the main decline, footwall drives, crosscuts and passing bays remain the same.

Evaluation of regional ground conditions, hydraulic radii, stoping dimensions and pillar requirements suggested that rib, sill and potentially regional pillar requirements can be significantly reduced through the introduction of backfill.

Geotechnical assessment suggested that the introduction of a typical paste backfill could eliminate rib pillars and reduce the thickness of sill pillars between sublevels to 4m, effectively allowing insertion o ........

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