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Mineralogy, Geochemistry, and Genesis of Bentonites in Miocene Volcanic-Sedimentary Units of the Ankara-Çankiri Basin, Central Anatolia, Turkey

Published online by Cambridge University Press:  01 January 2024

Selahattin Kadir ,
Tacit Külah ,
Nergis Önalgil ,
Hülya Erkoyun  and
W. Crawford Elliott
Selahattin Kadir*
Affiliation:
Department of Geological Engineering, Eskişehir Osmangazi University, TR-26480, Eskişehir, Turkey
Tacit Külah
Affiliation:
Department of Geological Engineering, Eskişehir Osmangazi University, TR-26480, Eskişehir, Turkey
Nergis Önalgil
Affiliation:
Department of Geological Engineering, Eskişehir Osmangazi University, TR-26480, Eskişehir, Turkey
Hülya Erkoyun
Affiliation:
Department of Geological Engineering, Eskişehir Osmangazi University, TR-26480, Eskişehir, Turkey
W. Crawford Elliott
Affiliation:
Department of Geosciences, Georgia State University, 30302, Atlanta, GA, USA
*
*E-mail address of corresponding author: skadir.euroclay@gmail.com
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Abstract

Widespread alteration in the Miocene lacustrine volcanic/sedimentary rocks of the Ankara-Çankiri basin of central Anatolia has resulted in the formation of sizeable (economic) quantities of bentonite deposits. No detailed characterization of the geological, mineralogical, and geochemical properties or the depositional environments of these primary and secondary bentonite deposits has been carried out to date. The present study was undertaken to close this knowledge gap. Two possible hypothetical processes were examined to explain the genesis of the bentonites: 1) The bentonites were formed by the devitrification of volcanic glass in a lacustrine setting; and 2) The bentonites were formed by the chemical weathering of previously deposited volcaniclastic sediments and ophiolitic materials. The characteristics of the bentonites were examined using X-ray diffractometry, scanning and transmission electron microscopy, energy dispersive spectroscopy, and chemical analyses of major and trace elements. The Ankara-Çankırı bentonites are found gradationally interbedded with parent Miocene volcanic and volcaniclastic rocks. These bentonites were deposited in a shallow lacustrine setting based on observed desiccation cracks, locally enclosed coal seams, plant rootlets, gypsum lenses, yellow sulfate-like fracture infillings, and ferric iron oxide stains. Smectite resulted from the chemical weathering of feldspar and possibly also the weathering of biotite and hornblende. This smectite was precipitated in situ on partially dissolved glass and feldspar. The average major-element composition of the smectite-rich clay fractions yielded the following montmorillonitic smectite structural formula: (Na0.33Ca0.31K0.18) (Al2.35Fe0.80Mg0.78)(Si7.79Al0.21)O20(OH)4.

The interlayer cation occupancy in the smectite-rich clay fractions was based on the use of Na+/(Na++Ca2+) ratios and showed a composition between a Ca-smectite and a Na-smectite. The relative increases in several groups of elements according to the LREE/(MREE+HREE) ratio, Al2O3, the sum of Ni+Co+Cr, the sum of Fe2O3+MgO+TiO2, the positive correlation between Rb+Ba and Na2O+K2O, Sr and Rb, Rb/Sr and Zr, Zr/Sm and SiO2, the negative Eu anomaly, and the field and petrographic observations further showed that the Si, Al, Fe, and Mg required to form smectite were mainly supplied from the decomposition of feldspars, amphiboles, and volcanic glass from volcanic materials and were partially supplied from the chemical weathering of ophiolitic basement units. The bentonite deposits examined in this study are mainly primary bentonites derived from volcanics and local secondary bentonites from previously deposited volcaniclastic sediments and ophiolitic materials.

Keywords

Ankara-Çankırı BasinBentoniteGenesisGeochemistryMineralogyTurkeyVolcanicsWeathering
Type
Article
Information
Clays and Clay Minerals , Volume 65 , Issue 2 , April 2017 , pp. 64 - 91
Copyright
Copyright © Clay Minerals Society 2018

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References

Abedini, A. and Calagari, A.A., 2012 The mineralogy and geochemistry of Permian lateritic ores in east of Shahindezh, West-Azarbaidjan province Iranian Journal of Crystallography and Mineralogy 20 59–72.Google Scholar
Aker, S., 2013.Evaluation of a Cenozoic Lacustrine Basin — Hancili Formation (Kalecik-Ankara) and its Paleoenvironment and Paleoclimate Analysis Based on Mineral FaciesGoogle Scholar
Akyürek, B. Duru, M. Sütçü, Y.F. Papak, Şaroğlu, F. Pehlivan, N. Gönenç, O. Granit, S. and Yaşar, T., 1996.Ankara Ilinin çEvre Jeolojisi Ve DoğAl Kaynaklar Projesi (1994 Yili Jeoloji Grubu çAlşMaları)Google Scholar
Assah, A.N.E. Yokoyama, T. Aka, F.T. Usui, T. Wirmvem, M.J. Tchamabe, B.C. Ohba, T. Tanyileke, G. and Hell, J.V., 2015 A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints Geoscience Frontiers 6 557–570.CrossRefGoogle Scholar
Aydınçakır, E. and Şen, C., 2013 Petrogenesis of the postcollisional volcanic rocks from the Borçka (Artvin) area: Implications for the evolution of the Eocene magmatism in the Eastern Pontides (NE Turkey) Lithos 172–173 98–117.CrossRefGoogle Scholar
Bakır, S. Akbulut, A. Kapkaç, F. Karahan, D.S. and Çetin, C., 2012.Türkiye Bentonit Envanteri (Envanter Serisi 204), Maden Tetkik ve Arama Genel Mu:dürlüğü, Ankara [Turkey Bentonite Inventory (Inventory Series 204), Ankara, Turkey, General Directorate of Mineral Research and Exploration]Google Scholar
Becquer, T. Quantin, C. Rotte-Capet, S. Ghanbaja, J. Mustin, C. and Herbillon, A.J., 2006 Sources of trace metals in Ferralsols in New Caledonia European Journal of Soil Science 57 200–213.CrossRefGoogle Scholar
Butt, C.R.M. and Cluzel, D., 2013 Nickel laterite ore deposits: weathered Serpentinites Elements 9 123–128.CrossRefGoogle Scholar
Chamley, H., 1989 Clay Sedimentology New York Springer Verlag.CrossRefGoogle Scholar
Christidis, G.E., 1998 comparative study of the mobility of major and trace elements during alteration of an andesite and a rhyolite to bentonite, in the islands of Milos and Kimolos, Aegean, Greece Clays and Clay Minerals 46 379–399.CrossRefGoogle Scholar
Christidis, G. and Dunham, A.C., 1997 Compositional variations in smectites Part II: Alteration of acidic precursors. A case study from Milos Island Greece.ClayMinerals 32, 253–270.CrossRefGoogle Scholar
Christidis, G.E. and Huff, W.D., 2009 Geological aspects and genesis of bentonites Elements 5 93–98.CrossRefGoogle Scholar
Dangerfield, A. Harris, R. Sarıfakıoğlu, E. Dilek, Y., Wakabyashi, J. and Dilek, Y., 2011.Tectonic evolution of the Ankara Mélange and associated Eldivan ophiolite near Hançılı, central Turkey Mélanges: Processes of Formation and Societal SignificanceCrossRefGoogle Scholar
Deschamps, R. Kohler, E. Gasparrini, M. Durand, O. Euzen, T. and Nader, F., 2012 Impact of mineralogy and diagenesis on reservoir quality of the Lower Cretaceous Upper Mannville Formation (Alberta, Canada) Oil and Gas Science and Technology-Rev. IFP Energies nouvelles 67 31–58.CrossRefGoogle Scholar
Ddani, M. Meunier, A. Zahraoui, M. Beaufort, D. El Wartiti, M. Fontaine, C. Boukili, B. and El Mahi, B., 2005 Clay mineralogy and chemical composition of bentonites from the Gourougou volcanic massif, Northeast Morocco Clays and Clay Minerals 53 250–267.CrossRefGoogle Scholar
Dilek, Y. and Thy, P., 2006 Age and petrogenesis of plagiogranite intrusions in the Ankara mélange, central Turkey Island Arc 15 44–57.CrossRefGoogle Scholar
Dönmez, M. and Akcçay, A.E., 2010 Geological Map of Çankırı H 30 Quadrangle, Scale 1:100.000 General Directorate Of Mineral Research And Exploration (Mta) Publications Turkey Ankara.Google Scholar
Dublet, G. Juillot, F. Morin, G. Fritsch, E. Fandeur, D. Brown, G.E. Jr, 2015 Goethite aging explains Ni depletion in upper units of ultramafic lateritic ores from New Caledonia Geochimica et Cosmochimica Acta 160 1–15.CrossRefGoogle Scholar
Ekinci Şans, B. Esenli, F. Kadir, S. and Elliott, W.C., 2015 Genesis of smectite in siliciclastics and pyroclastics of the Eocene İslambeyli Formation in the Lalapasa region, NW Thrace, Turkey Clay Minerals 50 459–483.CrossRefGoogle Scholar
Fan, R. and Gerson, A.R., 2011 Nickel geochemistry of a Philippine laterite examined by bulk and microprobe synchrotron analyses Geochimica et Cosmochimica Acta 75 6400–6415.CrossRefGoogle Scholar
Freyssinet, P. Butt, C.R.M. Morris, R.C. and Piantone, P., 2005 Ore-forming processes related to lateritic weathering Economic Geology 100th Anniversary Volume 681–722.CrossRefGoogle Scholar
Ghanem, H. and Jarrar, G.H., 2013 Geochemistry and petrogenesis of the 595 Ma shoshonitic Qunai monzogabro, Jordan Journal of African Earth Sciences 88 1–14.CrossRefGoogle Scholar
Gökten, E. and Floyd, P.A., 2007 Stratigraphy and geochemistry of pillow basalts within the ophiolitic mélange of the İzmir-Ankara-Erzincan suture zone: implications for the geotectonic character of the northern branch of Neotethys International Journal of Earth Sciences 96 725–741.CrossRefGoogle Scholar
Göncüoğlu, M.C. Yalınız, K. and Tekin, U.K., 2006 Geochemistry, tectono-magmatic discrimination and radiolarian ages of basic extrusives within the Izmir-Ankara suture belt (NW Turkey): Time constraints for the Neotethyan evolution Ofioliti 31 25–38.Google Scholar
Grant, J.A., 1986 The isocon diagram — a simple solution to Gresens’ equation for metasomatic alteration Economic Geology 81 1976–1982.CrossRefGoogle Scholar
Grant, J.A., 2005 Isocon analysis: A brief review of the method and applications Physics and Chemistry of the Earth 30 997–1004.CrossRefGoogle Scholar
Hakyemez, Y. Barkurt, M.Y. Bilginer, E. Pehlivan, Can, B. Dağer, Z. and Sözeri, B., 1986.General Directorate of Mineral Research and ExplorationGoogle Scholar
Huff, W. D. Anderson, T. B. Rundle, C. C. and Odin, G. S., 1991 Chemostratigraphy, K-Ar ages and illitization of Silurian K-bentonites from the Central Belt of the Southern Uplands-Down-Longford terrane, British Isles Journal of the Geological Society 148 861–868.CrossRefGoogle Scholar
Huff, W.D., 2016 K-bentonites: A review American Mineralogist 101 43–70.CrossRefGoogle Scholar
Jeans, C.V. Merriman, R.J. Mitchell, J.G. and Bland, D.J., 1982 Volcanic clays in the Cretaceous of southern England and northern Ireland Clay Minerals 17 105–156.CrossRefGoogle Scholar
Kadir, S. Baş, H. and Karakaş, Z., 2002 Origin of sepiolite and loughlinite in a Neogene volcano—sedimentary lacustrine environment, Mihalıççık—Eskişehir, Turkey The Canadian Mineralogist 40 1091–1102.CrossRefGoogle Scholar
Kadir, S. Kolaylı, H. and Eren, M., 2013 Genesis of sedimentary–and vein–type magnesite deposits at Kop Mountain, NE Turkey Turkish Journal of Earth Sciences 22 98–114.Google Scholar
Kadir, S. Eren, M. Külah, T. Önalgil, N. Cesur, M. and Gürel, A., 2014 Genesis of late Miocene—Pliocene lacustrine palygorskite and calcretes from Kırşehir, central Anatolia, Turkey Clay Minerals 49 473–494.CrossRefGoogle Scholar
Kadir, S. Aydoğan, M.S. Elitok, and Helvacı, C., 2015 Composition and genesis of nickel-chrome-bearing nontronite and montmorillonite in lateritized ultramafic rocks in the Muratdagi region (Uşak, western Anatolia), Turkey Clays and Clay Minerals 63 163–184.CrossRefGoogle Scholar
Karadenizli, L. Seyitoğlu, G. Saraç, G. Kazancı, N. Şen, Hakyemez, Y. and Savasşç, D., 2003 ÇankırıÇorum havzası batı kenarının erken-orta Miyosen paleocoğrafik evrimi Maden Tetkik ve Arama Dergisi (Mining Investigation and Search Magazine) 126 69–86.Google Scholar
Kaymakcçı, N., 2000.Tectono-stratigraphical Evolution of the Çank.r. BasinGoogle Scholar
Kocçyiğit, A. Türkmenoğlu, A. Beyhan, Kaymakçı, N. and Akyol, E., 1995 Post-Collisional tectonics of Eskişehir- Ankara-Çankırı segment of İzmir-Ankara-Erzincan suture zone: Ankara Orogenic Phase. Türkiye Petrol Jeologlar. DerneĞi Bülteni (Turkish Petroleum Geologists Association Bulletin) 6 69–86.Google Scholar
Külah, T. Kadir, S. Gürel, A. Eren, M. and Önalgil, N., 2014 Mineralogy, geochemistry, and genesis of mudstones in the upper Miocene Mustafapasa member of the Ürgüp formation in the Cappadocia region, central Anatolia, Turkey Clays and Clay Minerals 62 267–285.CrossRefGoogle Scholar
Kunze, G.W. Dixon, J.B., Klute, A., 1986 Pretreatment for mineralogical analysis Methods of Soil Analysis, Part 1. Physical and Mineralogical Methods 2 Madison, Wisconsin, USA American Society of Agronomy, Inc. and the Soil Science Society of America, Inc. 91–100.Google Scholar
Lai, Y.-M. Song, S.-R. Lo, C.-H. Lin, T.-H. Chu, M.-F. and Chung, S.-L., 2017 Age geochemical and isotopic variations in volcanic rocks from the Coastal Range of Taiwan: Implications for magma generation in the Northern Luzon Arc Lithos 272–273 92–115.CrossRefGoogle Scholar
Li, Y. Cai, J. Song, M. Ji, J. and Bao, Y., 2016 Influence of organic matter on smectite illitization: A comparison between red and dark mudstones from the Dongying Depression, China American Mineralogist 101 134–145.CrossRefGoogle Scholar
López-Moro, F.J., 2012 EASYGRESGRANT — A Microsoft Excel spreadsheet to quantify volume changes and to perform mass-balance modeling in metasomatic systems Computers and Geosciences 39 191–196.CrossRefGoogle Scholar
Moe, J.A. Ryan, P.C. Elliott, W.C. and Reynolds, R.C., 1996 Petrology, chemistry, and clay mineralogy of a Kbentonite in the Proterozoic Belt Supergroup of Western Montana Journal of Sedimentary Research PartA. 66, 95–99.Google Scholar
Moore, D.M. and Reynolds, R.C., 1989.X-ray Diffraction and the Identification and Analysis of Clay MineralsGoogle Scholar
Mongelli, G., 1997 Ce-anomalies in the textural components of Upper Cretaceous karst bauxites from the Apulian carbonate platform (southern Italy) Chemical Geology 140 69–79.CrossRefGoogle Scholar
Motoki, A. Sichel, S.E. Vargas, T. Melo, D.P. and Motoki, K.F., 2015 Geochemical behaviour of trace elements during fractional crystallization and crustal assimilation of the felsic alkaline magmas of the state of Rio de Janeiro, Brazil Anais da Academia Brasileira de Ciências (Annals of the Brazilian Academy of Sciences) 87 1959–1979.CrossRefGoogle ScholarPubMed
Nesbitt, H.W. and Young, G.M., 1984 Prediction of some weathering trends of plutonic and volcanic rocks based on thermodynamic and kinetic considerations Geochimica et Cosmochimica Acta 48 1523–1534.CrossRefGoogle Scholar
Newman, A.C.D. Brown, G., Newman, A.C.D., 1987 The interaction of water with clay mineral surfaces Chemistry of Clays and Clay Minerals New York, USA Wiley 1–128.Google Scholar
Okay, A. and Tüysüz, O., 1999 Tethyan Sutures of Northern Turkey Geological Society London Special Publications, 156, 475–515.CrossRefGoogle Scholar
Osborn, S.G. Duffield, L.T. Elliott, W.C. Wampler, J.M. Elmore, R.D. and Engel, M.H., 2014 The timing of diagenesis and thermal maturation of the Cretaceous Marias River Shale, Disturbed Belt, Montana Clays and Clay Minerals 62 112–125.CrossRefGoogle Scholar
Özdamar, S. Ece, I. Uz, B. Boylu, F. Ercan, H. and Yanık, G., 2014 Element mobility during the formation of the Uzunisa-Ordu bentonite, NE Turkey, and potential applications Clay Minerals 49 609–633.CrossRefGoogle Scholar
Paz, S.P.A. Angélica, R.S. and Neves, R.F., 2012 Mgbentonite in the Parnaíba Paleozoic Basin, Northern Brazil Clays and Clay Minerals 60 265–277.CrossRefGoogle Scholar
Ray, D.C. Collings, A.J.V. Worton, G.J. and Jones, G., 2011 Upper Wenlock bentonites from Wren’s Nest Hill, Dudley: comparisons with prominent bentonites along Wenlock Edge, Shropshire, England Geological Magazine CambridgeUniversityPress 148, 670–681.CrossRefGoogle Scholar
Rojay, B., 2013 Tectonic evolution of the Cretaceous Ankara Ophiolitic Mélange during the Late Cretaceous to pre- Miocene interval in Central Anatolia, Turkey Journal of Geodynamics 65 66–81.CrossRefGoogle Scholar
Ross, C.S. and Shannon, E.V., 1926 The minerals of bentonite and related clays and their physical properties American Ceramic Society Journal 9 77–96.CrossRefGoogle Scholar
Sevin, M. and Uğuz, M.F., 2011 Geological Map of Çankırı G 30 Quadrangle, Scale 1:100.000 General Directorate of Mineral Research and Exploration (MTA) Publications Turkey Ankara.Google Scholar
Seyitoğlu, G. Kazancı, N. Karadenizli, L. Şen, Varol, B. and Karabıyıkoğlu, T., 2000 Rockfall avalanche deposits associated with normal faulting in the NW of Çankırı basin: Implications for the post-collisional tectonic evolution of the Neo-Tethyan suture zone Terra Nova 12 245–251.CrossRefGoogle Scholar
Środoń, J. Clauer, N. Banas, M. and Wójtowicz, A., 2006 K-Ar evidence for a Mesozoic thermal event superimposed on burial diagenesis of the Upper Silesia Coal Basin ClayMinerals 41 669–690.CrossRefGoogle Scholar
Summa, L.L. and Verosub, K.L., 1992 Trace element mobility during early diagenesis of volcanic ash: applications to stratigraphic correlation Quaternary International 13–14 149–157.CrossRefGoogle Scholar
Sun, S.-S. and McDonough, W.F., 1989 Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes Geological Society Special Publications 42 313–345.CrossRefGoogle Scholar
Takagi, T. Koh, S.M. Song, M.S. Itoh, M. and Mogi, K., 2005 Geology and properties of the Kawasaki and Dobuyama bentonite deposits of Zao region in northeastern Japan Clay Minerals 40 333–350.CrossRefGoogle Scholar
Torres-Alverado, I.S. Lenhardt, N. Arce, J.L. and Hinderer, M., 2016 Geochemical and isotopic composition of volcanic rocks of the heterogeneous Miocene (~23–19 Ma) Tepoztlán Formation, early Transmexican Volcanic Belt, Mexico Journal of Volcanology and Geothermal Research 316 72–84.CrossRefGoogle Scholar
Tsikouras, B. Passa, K.-S. IIiopoulos, I. and Katagas, C., 2016 Microstructural control on perlite expansibility and geochemical balance with a novel application of isocon analysis: An example from Milos Island perlite (Greece) Minerals 6 1–14.CrossRefGoogle Scholar
Türkmenoğlu, A.G. Akıman, O. Aker, S. and Tankut, A., 1991 Geology and origin of clay deposits at Orta (Çankırı) area Bulletin of the Mineral Research and Exploration 113 87–92.Google Scholar
Tüysüz, O. and Dellaloğlu, A.A., 1992 Çankırı havzasının tektonik birlikleri ve jeolojik evrimi. Türrkiye 9 Petrol Kongresi Bildirileri (Petroleum Congress Reports) 1–17.Google Scholar
Vitali, F. Blanc, G. Larqué, P. Duplay, J. and Morvan, G., 1999 Thermal diagenesis of clay minerals within volcano-genic material from the Tonga convergent margin Marine Geology 157 105–125.CrossRefGoogle Scholar
Venturelli, G. Contini, S. Bonazzi, A. and Mangia, A., 1997 Weathering of ultramafic rocks and element mobility at Mt Prinzera rthernApennines Italy.CrossRefGoogle Scholar
Ver Straeten, C.A., 2004 K-bentonites, volcanic ash preservation, and implications for Early to Middle Devonian volcanism in the Acadian orogen, eastern North America Geological Society of America 116 474–489.CrossRefGoogle Scholar
Wang, W. Tang, J. Xu, W.-L. and Wang, F., 2015 Geochronology and geochemistry of Early Jurassic volcanic rocks in the Erguna Massif, northeast China: Petrogenesis and implications for the tectonic evolution of the Mongol- Okhotsk suture belt Lithos 218-219 73–86.CrossRefGoogle Scholar
Whitney, D.L. and Evans, B.W., 2010 Abbreviations for names of rock-forming minerals American Mineralogist 95 185–187.CrossRefGoogle Scholar
Wulaningsih, T. Humaida, H. Harijoko, A. and Watanabe, K., 2013 Major element and rare earth elements investigation of Merapi volcano, central Java, Indonesia Procedia Earth and Planetary Science 6 202–211.CrossRefGoogle Scholar
Wright, V.P. and Tucker, M.E., 1991 Calcretes Oxford Blackwell Scientific Publications.CrossRefGoogle Scholar
Yan, L.-L. He, Z.-Y. Jahn, B.-m. and Zhao, Z.-D., 2016 Formation of the Yandangshan volcanic-plutonic complex (SE China) by melt extraction and crystal accumulation Lithos 266–267 287–308.CrossRefGoogle Scholar
Zaid, S.M. and Al Gahtani, F., 2015 Provenance, diagenesis, tectonic setting and geochemistry of Hawkesbury Sandstone (Middle Triassic), southern Sydney Basin, Australia Turkish Journal of Earth Sciences 24 72–98.CrossRefGoogle Scholar
Zielinski, R.A., 1982 The mobility of uranium and other elements during alteration of rhyolite ash to montmorillonite: a case study in the Troublesome Formation, Colorado, U.S.A Chemical Geology 35 185–204.CrossRefGoogle Scholar
Zhou, L. Zhang, Z. Li, Y. You, F. Wu, C. and Zheng, C., 2013 Geological and geochemical characteristics in the paleo-weathering crust sedimentary type REE deposits, western Guizhou, China Journal of Asian Earth Sciences 73 184–198.CrossRefGoogle Scholar