Krantzit

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Krantzit is a type of amber that was described by Carl Wilhelm Bergemann in 1859 . He had received pieces of this fossil resin from the lignite of Latdorf , district of Nienburg near Bernburg (Saxony-Anhalt), from the mineral dealer Adam August Krantz for investigation and named it after him. Other finds come from Eocene lignite from Helmstedt , the Geiseltal , from Königsaue near Aschersleben and more recently from the Profen and Amsdorf opencast mines.

A find from Gottlieb Berendt comes from Samland . This find was confirmed by Hermann Spirgatis .

According to Carl Bergemann's description, the pure resin forms “a translucent, thin layer of almost transparent mass of light yellow or greenish color, which merges into reddish and brownish in a few isolated places and here shows a greater sheen than on the yellowish parts. The resin is so soft that it easily takes on impressions and can be cut, while being elastic and of great coherence. ”More recent descriptions come from Wimmer et al. Lying in the air, the resin becomes hard and crumbly and splintery. Since the Krantzit is mostly enclosed in the lignite, its peripheral areas contain more or less foreign matter. It does not contain succinic acid . A sulfur content of up to 6% was often found. A distinctive feature is the presence of aromatic substances. Stronger reddish colors indicate oxidation processes , this variant is called Oxikrantzit . In this variant, the aromatic compounds are missing.

Katinas suspects a member of the Storax tree family (Styracaceae) to be the producer of Krantzit . Vahldiek, on the other hand, considers Doliostrobus taxiformis (family Doliostrobaceae) to be the mother plant of Krantzit.

Individual evidence

  1. ^ Carl Wilhelm Sigismund Bergemann: XV. About a new fossil resin from brown coal (Krantzit) . In: Journal for practical chemistry , Volume 76, Issue 2, Leipzig 1859, pages 65-69 (online) .
  2. ^ Axel Lietzow, Siegfried Ritzkowski: Fossil resins in the brown coal-bearing layers of Helmstedt (Paleocene - Eocene, SE Lower Saxony) . In: Michael Ganzelewski, Rainer Slotta (ed.): Bernstein - Tränen der Götter , Bochum 1996, pages 83-88.
  3. Bernd-Wolfgang Vahldiek: In search of the amber producer from Helmstedt . In: Arbeitskreis Paläontologie Hannover - magazine for amateur paleontologists , volume 29, issue 2, Hannover 2001, pages 32–57 (online) .
  4. Günter Krumbiegel, Barbara Kosmowska-Ceranowicz: Fossil Resins around Halle (Saale) in the collection of the Museum of the Geisel Martin Luther University of Halle-Wittenberg . In: Scientific journal of the University of Halle , Volume XXXXI'92, Issue 6, Halle 1992, pages 5-35.
  5. ^ Günter Krumbiegel: Fossil resins from Geiseltal lignite and from the Königsaue opencast mine (Saxony-Anhalt) . In: Hallesches Jahrbuch für Geoswissenschaften , Volume B 17, Halle / Saale 1995, pages 139–148
  6. Gerda Standke, Jochen Rascher: Eocene resins in the lignite opencast mines Profen and Amsdorf. - A contribution to the genesis of amber deposits . In: Excursion guide and publications of the German Society for Geosciences , Issue 249, Hanover 2013, ISBN 978-3-86944-094-1 , pages 76-89.
  7. Gottlieb Michael Berendt: Immature amber . In: Writings of the Königliche Physikalisch-Ökonomische Gesellschaft zu Königsberg , Volume 13, 1.Abtheilung, Königsberg 1872, pages 133-135 (online) .
  8. ^ Johann Julius Hermann Spirgatis: About the identity of so-called immature amber with Krantzit . In: Writings of the Königliche Physikalisch-Ökonomische Gesellschaft zu Königsberg , Volume 13, 1st Section, Königsberg 1872, pages 136-137 (online) .
  9. Roland Wimmer, Günter Krumbiegel, Barbara Kosmowska-Ceranowicz, Ivo Rappsilber: Historical and new finds of Krantzit in Central Germany . In: Excursion guide and publications of the German Society for Geosciences , Issue 249, Hanover 2013, ISBN 978-3-86944-094-1 , pages 104–110.
  10. ^ V. Katinas: Fossil resin studies by chemical and physical methods. In: VIth Meeting Amber and Amber-bearing Sediments. Lecture Warszawa 1988.
  11. Bernd-Wolfgang Vahldiek: Amber from the Schöningen opencast mine, construction field south, (Lower Saxony, Northern Germany): The mother tree of Krantzit has been identified! In: Arbeitskreis Paläontologie Hannover - magazine for amateur paleontologists , year 43, Hannover 2015, pages 35–45.

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