Abstract
The Eocene deposits belonging to the Khanguet Rheouis area, North–South Axis, Central Tunisia, consist of three lithological units deposited in a shallow water environment that is congruent to the Eocene regression. The middle unit represents a massive white dolomitic clay with gypsum intercalations that increase towards the top, containing significant amounts of palygorskite. SEM–EDX, XRD, and XRF analytical techniques were deployed to better understand the mineralogical and geochemical properties of the collected samples. Microtextural characteristics were analyzed using SEM and polarizing microscopy. Mineral spectral characteristics were determined by the Fourier Transform Infrared (FTIR) spectroscopy. The XRD analysis results show the predominance of dolomite with variable amounts of palygorskite and low quartz contents. Samples contained low concentrations of Nb, Th, Zr, Y, Rb, Zn, Cr, and V, which showed a positive correlation with the major oxides SiO2, Al2O3, Fe2O3, K2O, and TiO2, and a negative correlation with MgO and CaO, indicating that trace elements were exclusively retained in palygorskite rather than dolomite. SEM observations of palygorskite showed dense mats of short, interwoven fibers that bridged and filled the pore spaces between the dissolved dolomite. These textural characteristics suggest that the formation of palygorskite is post-dates dolomitization. Petrographic observations illustrate the existence of micro-tectonic structures such as stylolites and microcracks, playing an important role in the distribution of palygorskite. The obtained results are consistent with the hypothesis of a neoformed origin of palygorskite by direct chemical precipitation from solution, after partial dissolution of the dolomite.
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References
Abdeljaoued S (1997) Mode de genèse des palygorskites dans la série continentale éocène de Tunisie mériodionale. Notes Du Serv Géol Tunisie 6:15–27
Akbulut A, Kadir S (2003) The geology and origin of sepiolite, palygorskite and saponite in Neogene lacustrine sediments of the Serinhisar-Acipayam basin, Deinizli, SW Turkey. Clays Clay Miner 51:279–292. https://doi.org/10.1346/CCMN.2003.0510304
Al-Juboury AI (2009) Palygorskite in Miocene rocks of northern Iraq: environmental and geochemical indicators. Acta Geol Pol 59(2):269–282
Allouche F, Eloussaief M, Ghrab S, Kallel N (2020) Clay material of an Eocene deposit (Khanguet Rheouis, Tunisia): identification using geochemical and mineralogical characterization. Clays Clay Miner 68:262–272. https://doi.org/10.1007/s42860-020-00062-0
Allouche F, Ammous A, Tlili A, Kallel N (2023) Uranium-bearing celestine and barite in the Upper-Paleocene deposits of the Siouf-Cherahil sector: stratigraphic distribution, geochemical, and mineralogical characterization. Carbonates Evaporites 38(31):1–21. https://doi.org/10.1007/s13146-023-00857-x
Allouche F (1997) Etude géologique du secteur compris entre les djebels Bouzer et Rhéouis (axe nord-sud, Tunisie centrale). Inventaire et cartographie des matériaux utiles des jebels Kebar et Merfeg, PhD thesis, Univ. Franche-Comté, France, p 411
Alvarez A, Santarén J, Esteban-Cubillo A, Aparicio P (2011) Current industrial applications of palygorskite and sepiolite. Dev Clay Sci 3:281–298. https://doi.org/10.1016/B978-0-444-53607-5.00012-8
Badraoui M, Bloom PR, Bouabid R (1992) Palygorskite-smectite association in a Xerochrept of the high Chaouia region of Morocco. Soil Sci Soc Am J 56:1640–1646. https://doi.org/10.2136/sssaj1992.03615995005600050051x
Baldermann A, Deditius AP, Dietzel M, Fichtner V, Fischer C, Hippler D, Leis A, Baldermann C, Mavromatis V, Stickler CP, Strauss H (2015) The role of bacterial sulfate reduction during dolomite precipitation: implications from Upper Jurassic platform carbonates. Chem Geol 412:1–14. https://doi.org/10.1016/j.chemgeo.2015.07.020
Bam E, Akiti TT, Osae SH, Ganyaglo S, Gibrilla A (2011) Multivariate cluster analysis of some major and trace elements distribution in an unsaturated zone profile, Densu river basin, Ghana. Afr J Environ Sci Technol 5(3):155–167. https://doi.org/10.4314/ajest.v5i3.71923
Birsoy R (2002) Formation of sepiolite-palygorskite and related minerals from solution. Clays Clay Miner 50:736–745. https://doi.org/10.1346/000986002762090263
Bolle MP, Adatte T (2001a) Paleocene-Early Eocene climatic evolution in the Thethyan realm: clay mineral evidence. Clay Miner 36(2):249–261. https://doi.org/10.1180/000985501750177979
Botha GA, Huges JC (1992) Pedogenic palygorskite and dolomite in a late Neogene sedimentary succession, northwestern Transvaal South Africa. Elsevier Science publishers B.V, Amesterdam, pp 139–154
Braithwaite CJR (1979) Crystal texture of recent fluvial pisolites and laminated crystalline crust in Dyfed, South Wales. J Sediment Petrol 49:181–194. https://doi.org/10.1306/212F76E9-2B24-11D7-8648000102C1865D
Brindley GW, Brown G (1980) Crystal structures of clay minerals and their X-ray identification. Monograph 5, Mineralogical Society, London, pp 197–248. https://doi.org/10.1180/mono-5
Burollet PF, Oudin JL (1980) Paléocène en Tunisie-Pétrole et phosphate. In: Géologie comparée des gisements de phosphate et de pétrole, mémoire du BRGM, 116
Burollet PF (1982) Réflexions sur les notions de coupure et de discontinuités. 9ème réunion des Sciences de la Terre, Paris, p 103
Callen RA (1984) Clays of the palygorskite-sepiolite group: depositional environment, age and distribution. Dev Sedimentol 37:1–37. https://doi.org/10.1016/S0070-4571(08)70027-X
Chaâbani F (1995) Dynamique de la partie orientale du bassin de Gafsa au Crétacé et au paléocène. Tunisie Méridionale, Thèse Doct. Es-Sci. Univ. Tunis II, Etude minéralogique et géochimique de la série phosphatée éocène, p 428
Chahi A, Petit S, Decarreau A (2002) Infrared evidence of dioctahedral-trioctahedral site occupancy in palygorskite. Clays Clay Miner 50:306–313. https://doi.org/10.1346/00098600260358067
Chamley H (1989) Clay sedimentology. Springer-Verlag, Berlin, p 623
Chen X, Lin H (2019) Palygorskite-based material will play an important role in modern ecological agriculture. Gansu Agric 8:95–98
Condie KC (1991) Another look at rare earth elements in shales. Geochim Cosmochim Acta 55(9):2527–2531. https://doi.org/10.1016/0016-7037(91)90370-k
Daoudi L (2004) Palygorskite in the uppermost Cretaceous Eocene rocks from Marrakech High Atlas, Morocco. J Afr Earth Sc 39:353–358. https://doi.org/10.1016/j.jafrearsci.2004.07.033
Daoudi L, Knidiri A, Rhouta B (2009) Structure, properties and genesis of Moroccan palygorskite. Orient J Chem 25(4):855–862
Derry LA, Brasier MD, Corfield RM, Rozanov AY, Zhuravlev AY (1994) Sr and C isotopes in Lower Cambrian carbonates from the Siberian craton: a paleoenvironmental record during the ‘Cambrian explosion’ Earth Planet. Sci Lett 128:678–681. https://doi.org/10.1016/0012-821X(94)90178-3
Draidia S, El Ouahabi M, Daoudi L, Havenith HB, Fagel N (2016) Occurrences and genesis of palygorskite/ sepiolite and associated minerals in the Barzaman formation, United Arab Emirates. Clay Miner 51:763–779. https://doi.org/10.1180/claymin.2016.051.5.06
Elderfield H, Upstill-Goddard R, Sholkovitz ER (1990) The rare earth elements in rivers, estuaries, and coastal seas and their significance to the composition of ocean waters. Geochim Cosmochim Acta 54(4):971–991
Farmer VC (1974) The infrared spectra of minerals: Mineralogical Society. Lond Monogr 4:539. https://doi.org/10.1180/mono-4
Felhi M, Tlili A, Montacer M (2008) Geochemistry, petrographic and spectroscopic studies of organic matter of clay associated kerogen of Ypresian series: Gafsa-Metlaoui phosphatic basin, Tunisia. Resour Geol 59:428–436. https://doi.org/10.1111/j.1751-3928.2008.00075.x
Frost RL, Cash GA, Kloprogge JT (1998) Rocky Mountain leather sepiolite and attapulgite–an infrared emission spectroscopic study. Vib Spectrosc 16(2):173–184. https://doi.org/10.1016/S0924-2031(98)00014-9
Frost RL, Locos OB, Ruan H, Kloprogge JTH (2001) Near-infrared and mid-infrared spectroscopic study of sepiolites and palygorskites. Vib Spectrosc 27(1):1–13. https://doi.org/10.1016/S0924-2031(01)00110-2
Galan E (1996) Properties and applications of palygorskite and sepiolite clays. Clay Miner 31:443–453. https://doi.org/10.1180/claymin.1996.031.4.01
Galan E, Pozo M (2011) Palygorskite and Sepiolite deposits in continental environments. Dev Clay Sci 3:125–173. https://doi.org/10.1016/B978-0-444-53607-5.00006-2
Gromet LP, Haskin LA, Korotev RL, Dymek RF (1984) The “North American shale composite”: its compilation, major and trace element characteristics. Geochim Cosmochim Acta 48(12):2469–2482. https://doi.org/10.1016/0016-7037(84)90298-9
Hameed A, Raja P, Ali M, Upreti N, Kumar N, Tripathi JK, Srivastava P (2018) Micromorphology, clay mineralogy, and geochemistry of calcic-soils from western Thar Desert: implications for origin of palygorskite and southwestern monsoonal fluctuations over the last 30ka. CATENA 163:378–398. https://doi.org/10.1016/j.catena.2017.12.034
Hassouba H, Shaw HF (1980) The occurrence of palygorskite in Quaternary sediments of the coastal plain of northwest Egypt. Clay Miner 15:77–83. https://doi.org/10.1180/claymin.1980.015.1.06
Hojati S, Khademi H, Faz CA, Ayoubi S, Landi A (2013) Factors affecting the occurrence of Palygorskite in Central Iranian soils developed on tertiary sediments. Pedosphere 23(3):359–371. https://doi.org/10.1016/S1002-0160(13)60027-2
Holail H, Al-Hajari S (1997) Evidence of an authigenic origin for the palygorskite in a Middle Eocene carbonate sequence from North Qatar. Qatar Univ Sci 17:405–418
Hong H, Yu N, Xiao P, Zhu Y, Zhang K, Xiang S (2007) Authigenic palygorskite in Miocene sediments in Linxia basin, Gansu, Northwestern China. Clay Miner 42:45–58. https://doi.org/10.1180/claymin.2007.042.1.04
Inoue K, Saito M, Naruse T (1998) Physicochemical, mineralogical, and geochemical characteristics of lacustrine sediments of the Konya Basin, Turkey, and their significance in relation to climatic change. Geomorphology 23:229–243. https://doi.org/10.1016/S0169-555X(98)00006-3
Jamoussi F, Abbès C, Fakhfakh E, Bédir M, Kharbachi S, Soussi M, Zargouni F, Lopez- Galindo A (2001) Découverte de l’Eocène continental autour de l’archipel de Kasserine, aux Jebels Rhéouis, Boudinar et Chamsi en Tunisie centro-méridionale: nouvelles implications paléogéographiques. Comptes Rendu De L’academie Des Sci Paris 333:329–335. https://doi.org/10.1016/S1251-8050(01)01657-3
Jamoussi F, Ben Aboud A, López-Galindo A (2003) Palygorskite genesis through silicate transformation in Tunisian continental Eocene deposits. Clay Miner 38:187–200. https://doi.org/10.1180/0009855033820088
Kadir S, Eren M, Atabey E (2010) Dolocretes and associated palygorskite occurrences in siliciclastic red mudstones of the Sarıyer formation (Middle Miocene), southeastern side of the Çanakkale strait, Turkey. Clays Clay Miner 58:205–219. https://doi.org/10.1346/CCMN.2010.0580206
Kadir S, Eren M, Külah T, Önalgil N, Cesur M, Gürel A (2014) Genesis of Late Miocene-Pliocene lacustrine palygorskite and calcretes from Kırsehir, Central Anatolia, Turkey. Clay Miner 49:473–494. https://doi.org/10.1180/claymin.2014.049.3.09
Kadir S, Eren M, Irkec T, Erkoyun H, Kulah T, Onalgil N, Huggett J (2017) An approach to genesis of sepiolite and palygorskite in lacustrine sediments of the Lower Pliocene Sakarya and Porsuk Formations in the Sivrihisar and Yunusemre-Bicer Regions (Eskisehir), Turkey. Clays Clay Miner 65:310–328. https://doi.org/10.1346/CCMN.2017.064067
Kadri A, Matmati F, Ben Ayed N, Ben Haj Ali M (1986) Découverte de l’Eocène inférieur continental au Jebel Lessouda (Tunisie centrale). Notes Du Service Géologique De Tunisie 51:53–59
Kaplan MY, Eren M, Kadir S, Kapur S, Huggett J (2014) A microscopic approach to the pedogenic formation of palygorskite associated with Quaternary calcretes of the Adana area, southern Turkey. Turk J Earth Sci 23:559–574. https://doi.org/10.3906/yer-1401-3
Khademi H, Mermut AR (1998) Source of palygorskite in gypsiferous aridisols and associated sediments from central Iran. Clay Miner 33:561–578. https://doi.org/10.1180/000985598545895
Kocsis L, Ounis A, Baumgartner C, Pirkenseer C, Harding IC, Adatte T, Chaabani F, Neili SM (2014) Paleocene-Eocene palaeoenvironmental conditions of the main phosphorite deposits (Chouabine Formation) in the Gafsa Basin, Tunisia. J Afr Earth Sc 100:586–597. https://doi.org/10.1016/j.jafrearsci.2014.07.024
Kumari N, Mohan C (2021) Basics of clay minerals and their characteristic properties. Clay Clay Miner. https://doi.org/10.5772/intechopen.97672
Lei Z, Wen S (2008) Synthesis and decoloration capacity of well-defined and PMMA-grafted palygorskite nanocomposites. Eur Polym J 44(9):2845–2849. https://doi.org/10.1016/j.eurpolymj.2008.03.023
Liu C, Chen Z, Zhu J, Liu Y, Jiang Y, Guan T, Li B, Lin L (2012) Mechanical properties and microstructure of 3D orthogonal quartz fiber reinforced silica composites fabricated by silicasol-infiltration-sintering. Mater Des J 36:289–295. https://doi.org/10.1016/j.matdes.2011.11.022
Lokier SW (2013) Coastal sabkha preservation in the Arabian Gulf. Geoheritage 5:11–22. https://doi.org/10.1007/s12371-012-0069-x
López GA, Ben Abboud A, Fenoll Hach-Ali P, Casas Ruiz J (1996) Mineralogical and geochemical characterization of palygorskite from Gabasa (NE Spain). Evidence of a detrital precursor. Clay Miner 31:33–34. https://doi.org/10.1180/claymin.1996.031.1.03
López-Galindo A, Viseras C, Aguzzi C, Cerezo P (2011) Pharmaceutical and cosmetic uses of fibrous clays. Dev Clay Sci 3:299–324. https://doi.org/10.1180/claymin.1996.031.1.03
Madejova J (2003) FTIR techniques in clay mineral studies. Vib Spectrosc 31(1):1–10. https://doi.org/10.1016/S0924-2031(02)00065-6
Madejova J, Balan E, Petit S (2011) Application of vibrational spectroscopy to the characterization of phyllosilicates and other industrial minerals. Eur Mineral Union Notes Mineral 9(1):171–226. https://doi.org/10.1180/EMU-notes.9.6
Matusewicz M, Pirkkalainen K, Liljeström V, Suuronen JP, Root A, Muurinen A, Serimaa R, Olin M (2013) Microstructural investigation of calcium montmorillonite. Clay Miner 48:267–276. https://doi.org/10.1180/claymin.2013.048.2.08
McKeown DA, Post IE, Etz ES (2002) Vibrational analysis of palygorskite and sepiolite. Clays Clay Miner 50:667–680. https://doi.org/10.1346/000986002320679549
McLennan SM (1989) Rare earth elements in sedimentary rocks: influence of provenance and sedimentary process. Rev Mineral 21:169–200
Murray HH (2000) Traditional and new applications for kaolin, smectite, and palygorskite: a general overview. Appl Clay Sci 17:207–221. https://doi.org/10.1016/S0169-1317(00)00016-8
Neaman A, Singer A (2004) Possible use of the Sacalum (Yucatan) palygorskite as drilling muds. Appl Clay Sci 25:121–124. https://doi.org/10.1016/j.clay.2003.08.006
Neaman A, Singer A (2011) The effects of palygorskite on chemical and physic-chemical properties of soils. Dev Clay Sci 3:325–349. https://doi.org/10.1016/B978-0-444-53607-5.00014-1
Nesbitt HW (1979) Mobility and fractionation of REE during weathering of granodiorite. Nature 279:206–210
Ouali JA (2007) Importance du réseau rhégmatique dans la tectogenèse de la Tunisie atlasique à travers l’étude de l’axe Nord-Sud, Tunis: HDR. Université de Tunis El Manar Faculté des Sciences de Tunis, Tunisia
Post JL, Crawford S (2007) Varied forms of palygorskite and sepiolite from different geologic systems. Appl Clay Sci 36(4):232–244. https://doi.org/10.1016/j.clay.2006.10.003
Reolid M, Nikitenko BL, Glinskikh L (2014) Trochammina as opportunist foraminifera in the Lower Jurassic from North Siberia. Polar Res 33:21653. https://doi.org/10.3402/polar.v33.21653
Ruiz-Hitzky E, Darder M, Fernandes FM, Wicklein B, Alcantara ACS, Aranda P (2013) Fibrous clays based bionanocomposites. Prog Polym Sci 38:1392–1414
Ryan BH, Kaczmarek SE, Rivers JM (2019) Dolomite dissolution: an alternative diagenetic pathway for the formation of palygorskite clay. Sedimentology 66:1803–1824. https://doi.org/10.1111/sed.12559
Shadfan H, Mashhady AS, Dixon JB, Hussen AA (1985) Palygorskite from tertiary formations of Eastern Saudi Arabia. Clays Clay Miner 33:451–457
Singer A (1979) Palygorskite in sediments: detrital, diagenetic or neoformed-A critical review. Geologie Rund 68:996–1008
Singer A (1984) Pedogenic palygorskite in the arid environment. Dev Sedimentol 37:169–177
Singer A (2002) Palygorskite and sepiolite. In: Dixon JB, Schulze DG (eds) Soil mineralogy with environmental applications. SSSA Book series. Soil Science Society of America, Madison, pp 555–583
Smith LB (2006) Origin and reservoir characteristics of Upper Ordovician Trenton-Black River hydrothermal dolomite reservoirs in New York. AAPG Bull 90:1691–1718
Stacey P, Kauffer E, Moulut JC, Dion C, Beauparlant M, Fernandez P, Key-Schwartz R, Friede B, Wake D (2009) An internationalcomparison of the crystallinity of calibration materials for the analysis of respirable alpha-quartz using X-ray diffraction and a comparison with results from the infrared KBrdisc method. Ann Occup Hyg 53:639–649
Suárez M, García-Romero E (2006) FTIR spectroscopic study of palygorskite: influence of the composition of the octahedral sheet. Appl Clay Sci 31:154–163. https://doi.org/10.1016/j.clay.2005.10.005
Suárez M, Garcia-Rivas J, Sanchez-Migallon JM, Garcia-Romer E (2018) Spanish palygorskites: geological setting, mineralogical, textural and crystal-chemical characterization. Eur J Mineral 4:733–746
Suárez M, García-Riva J, Morales J, Lorenzo A, García-Vicente A, García-Romero E (2021) Review and new data on the surface properties of palygorskite: a comparative study. Appl Clay Sci 216:106–311. https://doi.org/10.1016/j.clay.2021.106311
Tavares MT, Sousa AJ, Abreu MM (2008) Ordinary kriging and indicator kringing in the cartography of trace elements contamination in Sao Domingos mine site (Alentejo, Portugal). J Geochem Explor 98:43–56. https://doi.org/10.1016/j.gexplo.2007.10.002
Taylor SR, McLennan SM (1985) The continental crust: its composition and evolution. Blackwell, Oxford, p 312
Tlili A, Felhi M, Montacer M (2010) Origin and depositional environment of Palygorskite and Sepiolite from the Ypresian Phosphatic series. Southwest Tunis Clays Clay Miner 58(4):573–584. https://doi.org/10.1346/CCMN.2010.0580411
Tlili A, Felhi M, Fattah N, Montacer M (2011) Mineralogical and geochemical studies of Ypresian marly clays and silica rocks of phosphatic series, Gafsa Metlaoui basin, southwestern Tunisia implication for depositional environment. Geosci J 15:53–64. https://doi.org/10.1007/s12303-011-0003-2
Torres-Ruiz J, Lopez-Galindo A, Gonzalez-Lopez JM, Delgado A (1994) Geochemistry of Spanish sepiolite-palygorskite deposits: genetic considerations based on trace elements and isotopes. Chem Geol 112:221–245. https://doi.org/10.1016/0009-2541(94)90026-4
Turkmen I, Bolucek C (1998) The origin of clay minerals in salina playa- mudflat facies, Yeniçubuk Formation (lower-middle Miocene), Gemerek, Sivac, turkey. Turk J Earth Sci 7:1–10
Veizer JAN (1983) Chemical diagenesis of carbonates: theory and application of trace element technique. In: Arthur MA, Anderson TF, Kaplan IR, Veizer J, Land L (eds) Stable isotopes in sedimentary geology. SEPM, Dallas, pp 1–3
Velde B (1985) Clay minerals: a physico-chemical explanation of their occurrences. Dev Sedimentol 40:187–198
Verrecchia EP, Le Coustumer MN (1996) Occurrence and genesis of palygorskite and associated clay minerals in a Pleistocene calcrete complex, Sde Boqer, Negev Desert, Israel. Clay Miner 31:183–202. https://doi.org/10.1180/claymin.1996.031.2.04
Wang W, Wang A (2016) Nanocomposite of carboxymethyl cellulose and attapulgite as a novel pH-sensitive superabsorbent: synthesis, characterization and properties. Carbohyd Polym 82:83–91. https://doi.org/10.1016/j.carbpol.2010.04.026
Xie Q, Chen T, Zhou H, Xu X, Xu H, Ji J, Lu H, Balsam W (2013) Mechanism of palygorskite formation in the Red Clay Formation on the Chinese Loess Plateau, northwest China. Geoderma 192:39–49. https://doi.org/10.1016/j.geoderma.2012.07.021
Xie J, Chen T, Xing B, Liu H, Xie Q, Li H, Wu Y (2016) The thermochemical activity of dolomite occurred in; dolomite–palygorskite. Appl Clay Sci 3501:1–7. https://doi.org/10.1016/j.clay.2015.07.014
Ye C, Yang Y, Fang X, Hong H, Zhang W, Yang R, Song B, Zhang Z (2018) Mineralogical and geochemical discrimination of the occurrence and genesis of palygorskite in Eocene sediments on the northeastern Tibetan Plateau. Geochem Geophys Geosyst 19:567–581. https://doi.org/10.1002/2017GC007060
Yeniyol M (2012) Geology and mineralogy of a sepiolite–palygorskite occurrence from SW Eskiehir (Turkey). Clay Miner 47(1):93–104. https://doi.org/10.1180/claymin.2012.047.1.93
Zaaboub N, Abdeljawed S, López Galindo A (2005) Origin of fibrous clay in Tunisian Paleogene continental deposits. J Afr Earth Sc 43:491–504. https://doi.org/10.1016/j.jafrearsci.2005.08.013
Zhang S, Liu L, Liu Q, Zhang B, Qiao Z, Teppen BJ (2021) Genesis of palygorskite in the Neogene Baiyanghe Formation in Yangtaiwatan Basin, northwest China, based on the mineralogical characteristics and occurrence of enriched trace elements and REE. Clays Clay Miner 69:23–37. https://doi.org/10.1007/s42860-020-00104-7
Acknowledgements
The authors would like to thank for his technical support for XRD analysis at the Research and Technology Centre of Energy (CRTEn) Centre of Technology Researcher of Borj Cedria, Tunis. We would also like to thank Dr. Haithem Naffaty for support with electron microscopy analysis in ETAP. We are grateful to Pr. Jamel Touir for his help in the results of optical microscopic observations. The authors would like to thank Mr. Abdelmajid Dammak, English teacher and proofreader at the University of Sfax, for the careful editing and proofreading of this paper. Finally, we thank Editors and the anonymous reviewers whose constructive comments helped to improve and clarify the manuscript.
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Allouche, F., Ammous, A., Tlili, A. et al. Geological setting, geochemical, textural, and genesis of palygorskite in Eocene carbonate deposits from Central Tunisia. Carbonates Evaporites 39, 31 (2024). https://doi.org/10.1007/s13146-024-00943-8
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DOI: https://doi.org/10.1007/s13146-024-00943-8