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Silicified Woods Consist with Malachite, Azurite, and Hematite in the Middle Eocene Çekerek Formation, Tokat—Turkey


In the vicinity of Yücepinar Village of Zile district of Tokat province, there are silicified wood formations in agglomerate levels in the Çekerek formation Middle Eocene aged. These formations consist of well— preserved tree trunks of about 1.5 m in diameter or branches and trunk parts in mm—1 m length. Generally, they are open-brownish cream; in some places they demonstrate dark brown, green, and blue colors. According to XRD and FT-IR analysis results of the samples, it is determined that the silicified wood formations are composed of quartz, cristobalite, malachite, azurite, hematite, graphite, and goethite minerals. According to XRF and ICP-MS analyzes of silicified woods, the high iron content (Fe2O3 8.29–63.79%) in the samples causes red brown color while the increase in copper content (Cu >10 000 ppm) causes blue and green colors. As a result of the cabochon cuts made from the silicified wood samples to be used for jewellery, products which have rich color composition and silky brilliance, keep the polish well and with high-strength are obtained. Particularly because of its color compositions, it is separated from similar silicified wood samples on the Earth. As a result of the surface studies carried out in the study area, it was observed that the silicified wood formations did not propagate much. In order to determine the reserves of these formations, which are thought to have significant economic value, it is necessary to carry out a more detailed exploration activity with trenching and drilling in the region.

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  1. Akyazı, M. and Tunç, M., Zile (Tokat), Yöresinin stratigrafisi, TJK Bülteni, 1992. vol. 35, pp.35–46.

    Google Scholar 

  2. Akyazı, M., Zile (Tokat Yöresinin Jeolojik ve Paleontolojik Özellikleri, Yüksek Lisans Tezi), Cumhuriyet Üniv., Fen Bilimleri Enst., Jeol. Mühend. Anabilim Dalı, Sivas, 1991.

    Google Scholar 

  3. Bardet, M. and Pournou, A. NMR Studies of fossilized, Wood., in Ann. Rep. NMR Spectroscopy, Academic Press, 2017, vol. 90, pp. 41–83.

    Google Scholar 

  4. Güreli Yolcubal, H., Akyazi, M., Sezen, F., Toprak, F., Canbolat, M. Y., Koçak, F., and Özkan, A. Turhal-Pazar–Zile (Tokat) Yöresinin Üst Mesozoyik Stratigrafisi, Türkiye Jeol. Bülteni, 2014, vol. 57, pp. 1.

    Google Scholar 

  5. Kuczumow, A., Chevallier, P., Dillmann, P., Wajnberg, P., and Rudaś, M., Investigation of petrified wood by synchrotron X-ray fluorescence and diffraction methods. Spectrochim. Acta, Part B: Atom. Spectr., 2000. vol. 55, no. 10, pp. 1623–1633.

    Article  Google Scholar 

  6. Moore, P.R. and Wallace, R., Petrified wood from the Miocene volcanic sequence of Coromandel Peninsula, northern New Zealand, J R Soc. New Zeal., 2000, vol. 30, no. 2, pp. 115–130.

    Article  Google Scholar 

  7. Mustoe, G.E., Mineralogy and geochemistry of late Eocene silicified wood from Florissant fossil beds National Monument, Colorado, Geol. Soc. Am. Spec. Pap., 2008, vol. 435, pp. 127–140.

    Google Scholar 

  8. Mustoe, G.E., Late Tertiary petrified wood from Nevada, USA: Evidence of multiple silicification pathways, Geosci., 2015, vol. 5, pp. 286-309, ISSN 2076-3263.

  9. Mustoe, G. and Acosta, M., Origin of petrified wood color, Geosci., 2016, vol. 6, pp. 25.

    Article  Google Scholar 

  10. Mustoe, G.E. and Viney, M., Mineralogy of Paleocene petrified wood from Cherokee Ranch fossil forest, Central Colorado, USA, Geosci., 2017, vol. 7, no. 2, p. 23.

    Article  Google Scholar 

  11. Pewkliang, B., Pring, A., and Brugger, J., Opalisation of fossil bone and wood: clues to the formation of precious opal, in Regolith, CRC LEME, Australia, 2004, pp. 264–268.

    Google Scholar 

  12. Saminpanya, S., Thai-Myanmar petrified woods, Gems Gemol., 2015, vol. 51, no. 3, pp. 337–339.

    Google Scholar 

  13. Sarıiz, K. and Nuhoğlu, İ., Endüstriyel Hammadde Yatakları ve Madenciliği, Anadolu Üniversitesi, Eskisehir, 1992, no. 636.

  14. Scurfield, G. and Segnit, E.R., Petrifaction of wood by silica minerals, Sediment.Geol., 1984, vol. 39, no. 3/4, pp. 149–167.

    Article  Google Scholar 

  15. Senkayi, A.L., Dixon, J.B., Hossner, L.R., Yerima, B.P.K., and Wilding, L.P., Replacement of quartz by opaline silica during weathering of petrified wood, Clays Clay Min., 1985, vol. 33, no. 6, pp. 525–531.

    Article  Google Scholar 

  16. Stein, C.L., Silica recrystallization in petrified wood, J. Sediment.Res., 1982, vol. 52.

  17. Taylor, T.N., Taylor, E.L., and Krings, M., Paleobotany. The Biology and Evolution of Fossil Plants, Oxford: Elsevier, 2009.

    Google Scholar 

  18. Tetiker, S., KB Anadolu ve Tokat yöresindeki Karakaya Karmaşığı (meta)-magmatik kayaçlarının mineraloji-petrografisi ve jeokimyası, Cumhuriyet Üniversitesi Mühendislik Fakültesi Dergisi, Ser. A-Yerbilimleri, 2010, vol. 27, no. 1/2, pp. 1–18.

    Google Scholar 

  19. Üstüntaş, A. and İnceöz, M., Zile (Tokat) Batısında Uzunköy Çevresinin stratigrafisi, Türkiye Jeoloji Bülteni, 1999, vol. 42, no. 1, pp. 69–83.

    Google Scholar 

  20. Yılmaz, A. and Yilmaz, H., Geology and structural evolution of the Tokat Massif (Eastern Pontides, Turkey), Turk. J. Earth Sci. 2004, vol. 13, pp. 231–246.

    Google Scholar 

  21. Zhang, F.Q., Chen, H.L., Batt, G.E., Li, Z.X., and Yang, S.F., Early Cretaceous Aptian charcoal from Xinchang Petrified Wood National Geopark of Zhejiang province, eastern South China. Palaio, 2014, vol. 29, no. 7, pp. 325–337.

    Article  Google Scholar 

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This work was carried out within the scope of the project no. MMF.A3.16.005 supported by Ahi Evran University, Scientific Research Projects Coordination Unit. We would like to thank Ahi Evran University, Scientific Research Projects Coordination Unit, which provided financial support for the realization of this study.

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Correspondence to Zeynel Başıbüyük.

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Akbudak, İ., Başıbüyük, Z. & Gürbüz, M. Silicified Woods Consist with Malachite, Azurite, and Hematite in the Middle Eocene Çekerek Formation, Tokat—Turkey. Lithol Miner Resour 56, 548–558 (2021).

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  • silicified wood
  • azurite
  • malachite
  • mineralogy
  • geochemistry