Kuselit
The kuselite (originally cuselite ) is the regional name for a small to medium-grain igneous rock with a greenish-gray color, partly rust-red coloring and a spotty structure . Plagioclase feldspar and pyroxene are the primary mineral components of kuselite, which have been converted into other minerals by the action of hot aqueous solutions.
The name Kuselit was derived from the occurrence of the rock in the vicinity of the Palatinate district town of Kusel and was coined in 1887 by Karl Heinrich Rosenbusch in the spelling Cuselit . The term kuselite is no longer used in petrographic nomenclature and in this sense is only of historical significance. The local application of the term is unaffected. The kuselite is a lamprophyric rock that has been changed by an autometamorphosis. According to its mineral composition, it lies between the Minettes and Vogesites and between the Spessartites and Kersantites .
There were different opinions about the position of the kuselite within the igneous rock group. Franz Loewinson-Lessing recorded it in his Petrographic Lexicon from 1893 as "Cuselite" and describes the rock with reference to Rosenbusch "as an augite porphyrite corresponding to the leukophyrus". The expanded petrographic dictionary from 1937, jointly edited with EA Struve , refers to autometamorphic changes in the rock and indicates the mineral content. Mattheus Schuster assigned the Kuselite to the "Augitkeratophyren". According to W. Dienemann and O. Burre, they were referred to in 1929 as "low-mica Augitkersantite" with reference to the geological map of the area at that time. In 1935 Walter Ehrenreich Tröger saw the kuselite in his special petrography of igneous rocks not as part of the lamprophyric rock group and classified it as a quartz-bearing augite porphyrite. He referred to what he believed to be an incorrect nomenclature within the lamprophyre group by other authors.
In the North Palatinate Bergland , the main deposit in Germany, the passages of the Kuselite from the Rotliegend reach minable strengths. The rock extracted is used as gravel , grit and paving stones .
literature
- Robert L. Bates, Julia A. Jackson (Eds.): Glossary of Geology . Alexandria VA, 1987
- Donald R. Bowes et al .: The Encyclopedia of Igneous and Metamorphic Petrology . New York 1989
- Wilhelm Dienemann, Otto Burre: The usable rocks in Germany and their deposits. 2. Volume Solid Rock. Stuttgart 1929
- RW Le Maitre et al .: Igneous Rocks: A Classification and Glossary of Terms. Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks. Cambridge University Press 2005. ISBN 0-521-61948-3
- Franz Loewinson-Lessing: Petrographisches Lexikon. Repertory of petrographic terms and names . Jurjew [Dorpat] 1893-1895
- FJ Loewinson-Lessing, EA Struve: Petrografitscheski Slowar . Moscow 1937
- Ludwig Pfeiffer, Manfred short, Gerhard Mathé: Introduction to petrology . Berlin 1981
- Dietmar Reinsch: Natural stone studies. An introduction for civil engineers, architects, preservationists and stonemasons . Stuttgart 1991 ISBN 3-432-99461-3
- Ehrenreich Tröger: Special petrography of igneous rocks. A nomenclature compendium . Berlin 1935
Individual evidence
- ↑ a b c Tröger: Eruptivgesteine, p. 98
- ↑ a b Le Maitre et al .: Igneous Rocks. P. 71
- ^ Pfeiffer, Kurz, Mathé: Petrologie, p. 104
- ^ Bowes: Petrology, p. 274
- ↑ Bates, Jackson, Geology, pp. 163-164
- ↑ Loewinson-Lessing: Lexicon, p. 45
- ↑ Loewinson-Lessing, Struve: Slowar, p. 162
- ↑ Schuster: Comparative microscopic investigations of the eruptive rocks from the upper Nahe basin . Part I / continuation: Palatinit from Martinstein and grazing lights on the origin of the Kuselite . In: New contributions to the knowledge of the Permian igneous rocks from the Bavarian Rhine Palatinate and its neighboring areas. 1923, pp. 49-74
- ↑ Dienemann, Burre: rocks, S. 132, 135
- ↑ Dienemann, Burre: rocks, p 140
- ↑ Reinsch: Natursteinkunde, p. 246
- ↑ Dienemann, Burre: rocks, S. 132, 135