Retznei quarry

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The quarry in Retznei

The Retznei quarry is located in Retznei in southwest Styria , on the northern edge of the Windischen Bühel . The lime is primarily used for cement production in the Retznei cement works .

history

In 1908 the Ehrenhauser Portlandzement  GmbH was founded in Retznei , and in 1909 the quarry started. The following year, 1910, it was taken over by the Perlmooser Zementwerke company based in Kirchbichl / Tyrol .

In 1938, before the outbreak of World War II, the mining was 88,000 tonnes per year, in 1941 mining was already carried out in two terraces,

At the end of 1960, fully mechanized mining began with deep borehole blasting, and in 1970 the rail connection to the cement works was established. In 1981 the annual output was already 800,000 t. In that year, the deposit north of the village on Rosenberg began (this mining existed earlier, but was noted in the 1950s as a "small, abandoned break"), and recultivation began in the old mining.

Since 1997 Perlmooser has been part of the French Lafarge Group, the world's leading building materials group at the time. The dismantling is carried out today by the successor company Lafarge Perlmooser , one of the world's largest cement manufacturers and the largest in Austria, in a subsidiary with a 30 percent stake of Strabag (Lafarge Cement) . Due to the presence of sulfur in the raw material, a flue gas scrubber was retrofitted in 1998 , and in 2005 a nitrogen purification using the SNCR process . In the 2010s there were around 90 employees working in the mining and cement works in Retznei.

geology

The deposit is a bank of Leithakalk , a sedimentary rock from the Paratethys Sea . It is deposited here on the edge of the Graz Bay (Styrian Tertiary basin) on the Central Styrian threshold . The formation comes from the Badenian (the local time scale corresponding to the Langhian and lower Serravallian of the Miocene ) and is around 16 to 13 million years old. The lowest layers are a marl .

The occurrence in Retznei is not so much a real reef , but more unstructured coral communities and coral lawns , there are seagrass meadows , loose reef framework, algae rubble , rhodolite limestone , an oyster bank , with widespread clastic fragments and with intermediate fine sand layers. Overall, especially in the regression phases of the sea, the habitat of a shoal was near the surface to the surf, while the eastern (new) quarry on Rosenberg is likely to have been located in somewhat deeper water.

The quarry is best known for its wealth of fossils and minerals . Found calcite (yellow, clear, milky, in different crystal forms, Druze , fused with fossils), pyrite-marcasite (tubers, filled fossils, partly crystal aggregates). On remains of the animal world were grouper Epinephelus casottii (completely preserved) Otodus megalodon (relative of the great white shark, teeth up to approx. 13 cm tall), nurse shark Ginglymostoma delfortriei (teeth), chisel- tooth wrasse Trigonodon jugleri and triggerfish Balistes muensteri (both dentition), Puffer fish , porcupine fish ( oligodiodon , chewing plates), squid ( Sepia vindobonensis , Schulp), pearl boats , crabs (whole, claws , tanks; swimming crab Portunus monspeliensis ; Dairidae ), sea ​​urchins ( Clypeaster , Schicaster , Conoclypus ). Mussel kernels (with and without shell preservation, drilling mussels),

Twice a year the operator offers a fossil search day.

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Mining and processing

The company operates a large quarry , which is divided into two outcrops. The older, western one ( ⊙ ) has been in operation for more than 100 years, but is currently being successively recultivated and converted into a large biotope. The second quarry, Rosenberg , north of the town of Retznei ( ⊙ coordinates: 46 ° 44 ′ 29 ″  N , 15 ° 33 ′ 56 ″  E ) has only been in operation for a few years.

Processing takes place in the local Retznei plant . The raw material lime is first (after blasting) crushed in a crusher system and transported via conveyor belts to the ball mills in the plant on the other side of the town. Then they are transported to a storage dump. Furthermore, the sound is reduced as a surcharge. After chemical analysis (composition), the raw material is mixed according to the desired target composition and burned to cement in the rotary kiln.

Around 500,000 tons of cement are produced here per year, around 20,000 tons of gypsum , 90,000 tons of blast furnace slag from Donawitz or 50,000 tons of coal ash from the Mellach district heating power station are added . Some of the raw material (15%) also comes from the Weissenegg quarry . Plastic recycling material (yellow sack) is also used for firing, Lafarge burns  90,000 tons annually in Retznei and Mannersdorf (Lower Austria). This thermal recycling is not viewed uncritically.

The plant has its own rail loading facility. Here, for example, the concrete for the Koralm tunnel is produced, which accounts for around 10% of production.

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See also

literature

  • Alois Hauser : The raw material extraction of the Perlmoos cement works in Styria. Festschrift of the Perlmooser Zementwerke, Vienna 1955.
  • Hartmut Hiden: The "Leithakalk" area of ​​Retznei-Aflenz-Wagna south of Leibnitz: geology, fossil guidance and mining history. In: Der Steirische Mineralog 16 (2001), pp. 14-19.
  • Christoph W. Erhart, Werner E. Piller: Facies, geometry and paleoecology of the Badenian Leitha Limestone at Retznei / Rosenberg (southern Styria). In: First Austrian Reef Workshop: 30-31 May 2003: Abstracts Volume (2003), pp. 10-11.
  • Christoph W. Erhart, Werner E. Piller: Paleoecological successions in the Badenian (Middle Miocene) Leitha Limestone (Retznei / Rosenberg, Southern Styria). In: 9th International Symposium on Fossil Cnidaria and Porifera, Graz, Austria, August 3-7, 2003: Abstracts (2003), p. 23 ( pdf , geologie.ac.at).
  • Alexander Schouppe: The fauna of the Retznei quarry near Ehrenhausen. In: Mitteilungen des Naturwissenschaftlicher Verein für Steiermark 77/78 (1949), pp. 142–144 ( pdf , geologie.ac.at).

Web links

Individual evidence

  1. ↑ a b c d e f Ilona Szednyj, Ilse Schindler: Reduction potentials of NEC gases and dust by 2010 in the Austrian cement industry. Federal Environment Agency: Reports BE-261, Vienna, 2005, chap. 2.4 Lafarge Perlmooser AG - Retznei , pp. 12-14 ( pdf , Umweltbundesamt.at; in pdf, pp. 16 ff).
  2. ^ Association of the Austrian cement industry: cement. foundation of the future. Sustainability report of the Austrian cement industry 2004. Vienna 2005, production sites: Retznei, p. 19 ( pdf , zement.at, accessed August 1, 2016).
  3. ↑ a b c d e f g R. Näderl, G. Suette; W. Gräf (project leader), Forschungsgesellschaft Joanneum - Institute for Environmental Geology and Applied Geography: Systematic recording of hard rock deposits in Styria. Final report (unpublished), Graz 1986; Supplement, sheets of Retznei cement plant. ( Sheets pdf ; whole work, pdf , there p. 862–864, supplement from p. 90; both website of the geological-mineral regional service, gmld.at).
  4. ↑ a b c Alois Hauser, Hans Urregg: The structurally usable rocks of Styria. Issue 4, Part 2 Limes (marl) of modern times and the Middle Ages of the earth. Graz 1950, Retznei - Leithakalkbruch , p. 31 ( page pdf , gis.stmk.gv.at).
  5. ↑ a b c d e f g h The gray gold from southern Styria. Thomas Wieser in: Kleine Zeitung online, February 8, 2013.
  6. ↑ a b Julius Georg Friebe: Lithostratigraphic restructuring and sedimentology of the deposits of the Badenian (Miocene) around the Central Styrian threshold (Styrian Basin, Austria). In: Jahrbuch der Geologische Bundesanstalt Volume 133 / Heft 2, 1990, Aufschluss 8 Parastratotype Steinbruch Retznei of the Perlmoser Zementwerke AG , p. 240 ff and Aufschluss 9 quarry expansion east of the Aflenz brook , p. 245, in chap. 6.3. The Leitha limestone deposits of the Central Styrian threshold , p. 236 f ( full article p. 223–255, pdf , geologie.ac.at; there p. 18 ff);
    excerpted in Geological Info on Retznei near Ehrenhausen. on fossilien.heimat.eu (accessed July 29, 2016).
  7. ↑ a b C.W. Erhart, Werner E. Piller: Facies and geometry of the Leitha limestone quarry Retznei / Rosenberg near Ehrenhausen. In: 7th Austrian Sedimentologist Workshop Seewalchen am Attersee, November 9, 2002: Program, Abstracts (2002), p. 4 .; also in: Pangeo Austria 2004: "Earth Sciences and the Public" Graz, 24.-26. September 2004: Summary of articles = Ber. Inst. Earth Science K.-F.-Univ. Graz. Volume 9 (2004), p. 116 ( pdf , geologie.ac.at); as an illustration on: earthscience.at .
  8. ↑ a b c Hartmut R. Hiden: Sepia vindobonensis (Cephalopoda, Coleoida) from the Middle Miocene from Retznei (Styria, Austria). In: Communications from the Department of Geology, Paleontology and Mining at the Landesmuseum Joanneum 52/53 (1994/95), pp. 111–124, pp. 13–18 ( pdf , geologie.ac.at).
  9. ↑ Layer name: Leithakalk. Database decorative rocks , geology and mineral Landesdienst: Earth Science Archive Styria (gmld.at; pdf).
  10. ^ Fritz Ebener, Reinhard F. Sachsenhofer : The history of the development of the Styrian tertiary basin. = Mitt. Dept. Geol. And Paleont. Landesmuseum Joanneum , Heft 49, Graz 1991 ( pdf ( memento of the original from July 26, 2016 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this note. , museum-joanneum.at). @1@ 2Template: Webachiv / IABot / www.museum-joanneum.at
  11. ↑ a b Universalmuseum Joanneum : Leithakalk. ( Memento of the original from September 17, 2015 in the Internet Archive ) Info: The @1@ 2Template: Webachiv / IABot / www.museum-joanneum.at archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Folder (pdf, museum-joanneum.at) - to the Lafarge plant in Retznei, with a map of the Paratethys west coast 16 million years ago (turn Kartpat – Baden).
  12. ↑ Friebe: Lithostratigraphische Neugliederung ... , 1990, p. 236, col. 2 (pdf p. 14).
  13. ^ Friebe: Lithostratigraphische Neugliederung ... , 1990, p. 245, col. 2 (pdf p. 23).
  14. ↑ Fossils from Retznei and minerals from Retznei. In: Karl Philipp: Fossilien und Mineralien aus der Steiermark (fossilien.heimat.eu, accessed July 29, 2016).
  15. ↑ Ortwin Schultz: A grouper (Epinephelus, Serranidae, Pisces) from the Middle Miocene from Retznei, Styria. In: Joannea - Geologie und Paläontologie 2 (2000), pp. 5-56.
  16. ↑ Hartmut Hiden: Remnants of a huge shark in Styria. In: Der Steirische Mineralog 5 (1992), pp. 17-18.
  17. ↑ Ortwin Schultz: Oligodiodon, a porcupine fish from the Middle Miocene (Badenium) of Styria, Austria (Diodontidae, Osteichthyes). In: Joannea - Geologie und Paläontologie 8 (2006), pp. 25–46 ( pdf , geologie.ac.at).
  18. ↑ Ingomar Fritz, Hartmut R. Hiden: Finds of Aturia (Nautiloidea) from the Miocene limestone quarry Retznei (Southwest Styria). In: Communications from the Department of Geology, Paleontology and Mining at the Landesmuseum Joanneum 52/53 (1994/95), pp. 13–18 ( pdf , geologie.ac.at).
  19. ^ HW wing: A new find of Portunus monspeliensis (A. Milne-Edwards) from the Badenium of Retznei (Styria). In: Mitt. Naturwiss. Ver. Styria 116 (1986), pp. 91-96 ( pdf , geologie.ac.at).
  20. ↑ Alexander Schouppe: Two decapods from the Torton of Retznei. In: Mitteilungen des Naturwissenschaftlicher Verein für Steiermark 77/78 (1949), pp. 139–141 ( pdf , geologie.ac.at).
  21. ↑ Hartmut Hiden: First find by Conoclypus Plagiosomus Agassiz from Retznei near Ehrenhausen. In: Der Steirische Mineralog 6 (1993), pp. 17-18.
  22. ↑ The Earth History Experience - Fossil Search in Retznei. In: suedsteirischeweinstrasse.at, July 11, 2016.
  23. ↑ Greenpeace: Focus on waste recycling - How safe are Austrian cement works? , August 2015 (pdf, on greenpeace.org) - Study following the HCB scandal in Carinthia .
  24. ^ Karl Metz: Prof. Dr. Alois Hauser in memory. In: Communications of the natural science association for Styria. 1956, PDF on ZOBODAT