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Neuburg - SpeedyLook encyclopedia Enter your search terms Submit search form Web

Neuburg - SpeedyLook encyclopedia Enter your search terms Submit search form Web

The Neuburger Kieselerde is a natural conglomerate of fine silica fine particles and a kaolinite content ranging from 20 to 40% by weight.

The only known deposits with this particular composition are in the environs of the city of Neuburg an der Donau, that could be translated like Neuburg of the Danube, since that city is in the bank of the mentioned river. Due to its purely mineral origin, Neuburg's Siliceous Earth differs from silica or diatomaceous earth, which appears on Kiesel and has a biological origin. Currently only one company is engaged in the extraction of Siliceous Earth from Neuburg, Hoffmann Mineral GmbH in Neuburg an der Donau. Approximately 55,000 tons are sold annually and 120,000 tons of material must be extracted. After the careful generation of sludge with well water, the fine part of the siliceous earth is separated by hydrocyclones. The Neuburg Siliceous Earth is used as a value added cargo material or as an abrasive / polishing material in various applications. For its purity it is also suitable for use as a dietary supplement.

Neuburg Siliceous Earth, finished product.

The Neuburg Silicium originated between 93 and 98 million years ago in the Cenomanian, the earliest stage of the late Cretaceous period, where, at that time, a bay where the sedimentation of the remains of granite masses of the Upper Palatinate (Oberpfalz) region took place. The predominant fossil is Inoceramidae.

Structure seen in scanning electron microscope.


Neuburg's Siliceous Earth is found in yams and incoming veins in the calcareous layers of the Jurassic. Certainly the most superficial deposits were always known by the locals since they had only a thin layer of earth on them. The present ones are in most cases under geologically younger layers at depths between five and twenty meters deep. Formerly the prospection was realized by the extraction of probetas by drill with manual instruments. At present, this extraction is carried out by means of mechanical drills that extract the material in a continuous and more efficient way economically, although the Siliceous Earth can be recognized easily in situ without special analysis because it differs clearly from the common earth and the limestone. / p>

Today's open pit mine.

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