How to find Neuburg Siliceous Earth?
In the early times of exploiting siliceous earth it was relatively simple to find out such deposits. The layers close to the surface became visible in the forests beneath the roots of tumbled trees, or they showed up during ploughing work on the fields
The long history of exploitation explains, however, that the siliceous earth deposits near the soil surface have been used up by now. The remaining deposits actually are mostly covered with clay and sand layers several meters in thickness, and this means the valuable raw material can only be identified by special procedures. A further complication results from the fact that the deposits are found only in a highly dispersed and sporadical manner, because they are not present over large areas.
For exploration purposes, the areas will be geologically pre-sounded, and then more closely examined through drill holes. Such examinations need the agreement of the ground owner in the form of an exploitation contract.
Presently, siliceous earth deposits have been explored for about 30 years of direct usage. HOFFMANN MINERAL assumes that with reasonable use of the deposits without excessive increases, deposits are still at hand for more than 100 years. This way, also upcoming generations will be able to occupy themselves with Neuburg Siliceous Earth. The drill holes, about 15 cm large and 80 cm max. in depth are sounded out by a company-owned team at a pattern of 50 x 50 m with suitable drilling equipment. Two in-house drilling vehicles have been specially developed for the siliceous earth exploration. A wide chain drive and an optimal weight distribution at normal weather conditions allow outside work without damaging the landscape.