Schmalgraf Mine, Kelmis (La Calamine), Plombières-Vieille Montagne-Moresnet (Plombières-Altenberg-Moresnet) mining district, Verviers, Liège Province, Belgium
|Latitude & Longitude (WGS84):||50° 41' 50'' North , 5° 59' 12'' East|
|Latitude & Longitude (decimal):||50.69736,5.98682|
|Köppen climate type:||Cfb : Temperate oceanic climate|
|Other/historical region names associated with this locality:||Comborn, Driesschacht, Klousterschacht|
The lead-zinc deposit of Schmalgraf, the deepest Belgian metallic mine (290m deep), was discovered in 1858 at the "Klousterschacht". It is situated at about 2,500m SW of the Altenberg mine (La Calamine), below the dump pits of ancient working.
The exploration started in 1867, after the digging of a horizontal drainage adit (Oskar-Stollen) of 500m long between the ore deposit (at a depth of 42m) and the valley of the river "Hohnbach".
From the -42m level, the ores were transported through the Oskar-Stollen directly to the wash plant of the Vieille-Montagne zinc factory of the Altenberg mine. This transport was done by means of a narrow-gauge train on the banks of the river Hohnbach.
The mine was closed in 1932 due to mining problems in depth and a depressed overall economic situation.
The mine had two main shafts, a transport- and a pump shaft to the -132m level.
Additionally, there were 3 shafts side by side (260m west from the first) for transport, pumping, and cables and 2 ventilation shafts. The first of these ventilation shafts went down to the -132m level and the second one went all the way down to the -290m level with a built-in ventilator at level -42m.
Most important was the one horizontal adit at -42m (Oskar Stollen) for the evacuation of the ore.
Schmalgraf Mine, Kelmis, Plombières-Vieille Montagne-Moresnet (Plombières-Altenberg-Moresnet) mining district, Verviers, Liège Province, Belgium
The mine had several levels: -42m, -92m, -132m, -155m, -210m, -255m and -290m.
Above ground, 30 people were occupied, 120 miners worked underground.
Total production between 1867 and 1 May 1932:
22,641 tonnes of calamine, 333,654 tonnes of schalenblende, 21,188 tonnes of galena and 29,295 tonnes of pyrite.
10 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
315 - 330.9 Ma