Pseudotachylite

A Pseudotachylit is a rock crystal, which is formed by frictional heat due to an error surface in low to medium depths crust. Externally a Pseudotachylit a black basalt glass ( Tachylit ) is similar.

Formation

At the offset of rock units near a tectonic fault in the upper, brittle areas of the crust minerals and mineral aggregates are mechanically crushed by the mutual rubbing and crawling movement on the fault plane. In this process, the affected rock games are normally converted to cataclasites or Kakiriten. At very high rates of movement temperatures by friction but locally up to 1000 ° C can be achieved, leading to the formation of molten rock. With rapid cooling, no crystals form, but the melt solidifies to an amorphous rock glass. It usually occurs in the form of thin transitions to within cataclasites.

Classification

Pseudotachylit is a metamorphic rock and belongs to the group of Ultrakataklasite.

Swell

  • G. H. Eisbacher: Introduction to tectonics. S. 173, Enke Verlag, Stuttgart 1996. ISBN 3-432-99252-1
  • P. Heitzmann: kakirites, cataclasites, mylonites - For the nomenclature of metamorphic rocks with deformation structures. Eclogues Helvetiae Geologica, vol 78, p 273-286, 1985
  • Metamorphic Rock
Crust (geology) Tachylite Fault breccia Fault gouge Amorphous solid Volcanic glass
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