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The Genesis of a Mordenite Deposit by Hydrothermal Alteration of Pyroclastics on Polyegos Island, Greece

Published online by Cambridge University Press:  28 February 2024

Konstantinos P. Kitsopoulos*
Affiliation:
Geology Department, Leicester University, Leicester, LE1 7RH, United Kingdom
*
Current address: 16 Aiolou Str., Paleo Faliro, 175 61, Athens, Greece.
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Abstract

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The vitric component of the silicic pyroclastic flows and surge deposits (Prassa ignimbrite unit), from the northwestern exposures of the pyroclastics formation of Polyegos Island, South Aegean Sea Volcanic Arc in Greece, is replaced by authigenic zeolite and clay minerals. Mordenite dominates, and clinoptilolite (heulandite type 3), illite and illite-smectite (I-S) are subordinate. Opal-CT, quartz, feldspar, biotite and halite complete the mineralogical suite. In the southwestern part of the pyroclastics formation (Myrsini pyroclastics unit), kaolinite, halloysite, alunite and amorphous silica are the major mineralogical constituents as a result of a strong hydrothermal alteration by solutions enriched in SO42-. Scanning electron microscope (SEM) examination proved that the 1st type of zeolites formed within the area were heulandite minerals, following the formation of smectite, as a result of the activity of pore fluids within the volcaniclastic pile. There was no substantial evidence to support a hypothesis that mordenite was formed with the heulandite minerals after the initial stages of glass dissolution, other than some very minor mordenite that was formed from a gel-like type of material. The majority of mordenite present is most often draped over and formed from the crystals of heulandite minerals. Heulandite minerals often show advanced dissolution effects. The mineral dissolution was due to the emplacement of rhyolite lava domes and flows and the associated temperature rise and circulation of hydrothermal fluids, which had also mixed with seawater. The volcanic activity raised the temperature and changed the pore fluid chemistry, and the more unstable members of the heulandite minerals group were transformed to mordenite. Clinoptilolite (heulandite type 3), which was found within a few samples, was thermally more stable than any heulandite type 1 or 2 phases initially present. Therefore, clinoptilolite was either transformed more slowly or within a very few cases, it has not been affected at all. A heulandite-minerals-derived material acted as the major precursor for the formation of mordenite. The temperature increase within the area and the later hydrothermal alteration effect are also indicated by the illitization of the smectite. Mordenite is also found to have formed from I-S clays. Overall, mordenite formed as a result of elevated temperature and high Na+ concentration.

Type
Research Article
Copyright
Copyright © 1997, The Clay Minerals Society

References

Alietti, A., 1972 Polymorphism and crystal-chemistry of heulandites and clinoptilolites Am Mineral 57 14481462.Google Scholar
Altaner, S.P. and Grim, R.E., 1990 Mineralogy, chemistry and diagenesis of tuffs in the Sucker Creek Formation (Miocene), Eastern Oregon Clays Clay Miner 38 561572 10.1346/CCMN.1990.0380601.CrossRefGoogle Scholar
Bargar, K.E. and Beeson, M.H., 1984 Hydrothermal alteration in research drill hole Y-6, Upper Firehole River, Yellowstone National Park, Wyoming US Geol Surv Prof Pap .CrossRefGoogle Scholar
Bell, T.E., 1986 Microstructure in mixed layer illite/smectite and its relationship to the reaction of smectite to illite Clays Clay Miner 34 146154 10.1346/CCMN.1986.0340205.CrossRefGoogle Scholar
Bish, D.L. Variman, D.T. Byers, F.M. and Broxton, D.E., 1982 Summary of the mineralogy-petrology of tuffs from the Yucca Mountain and the secondary-phase thermal stability in tuffs Los Alamos Natl Lab Report LA-9321-MS .CrossRefGoogle Scholar
Boles, J.R., 1972 Composition, optical properties, cell dimensions, and thermal stability of some Heulandite group zeolites Am Mineral 57 14631493.Google Scholar
Boles, J.R. and Franks, S.G., 1979 Clay diagenesis in Wilcox Sandstone of Southwest Texas: Implications of smectite diagenesis on Sandstone cementation J Sediment Petrol 49 5570.Google Scholar
Boles, J.R. and Surdam, R.C., 1979 Diagenesis of volcanogenic sediments in a Tertiary saline lake; Wagon Bed Formation, Wyoming Am J Sci 279 832853 10.2475/ajs.279.7.832.CrossRefGoogle Scholar
Bowers, T.S. and Burns, R.G., 1990 Activity diagrams for clinoptilolite. Susceptibility of this zeolite to further diagenetic reactions Am Mineral 75 601619.Google Scholar
Buatier, M.D. Peacor, D.R. and O’Neil, J.R., 1992 Smectite-illite transition in Barbados accretionary wedge sediments: TEM and AEM evidence for dissolution/crystallization at low temperature Clays Clay Miner 40 6580 10.1346/CCMN.1992.0400108.CrossRefGoogle Scholar
Carmichael, I.S.E. Turner, F.J. and Verhoogen, J., 1974 Igneous Petrology New York McGraw Hill.Google Scholar
Coombs, D.S. Ellis, A.J. Fyfe, W.S. and Taylor, A.M., 1959 The zeolite facies, with comments on the interpretation of hydrothermal syntheses Geochim Cosmochim Acta 17 53107 10.1016/0016-7037(59)90079-1.CrossRefGoogle Scholar
Ellis, A.J., 1960 Mordenite synthesis in a natural hydrothermal solution Geochim Cosmochim Acta 19 145146 10.1016/0016-7037(60)90048-X.CrossRefGoogle Scholar
Fyticas, M. and Vougioukalakis, G., 1992 A report of the geological-volcanological-geothermal observations for Kimolos and Polyegos Islands Report by IGME (Institute of Geological and Mineralogical Research of Greece) .Google Scholar
Hay, R.L.. 1966. Zeolites and zeolitic reactions in sedimentary rocks. Geol Soc Am Spec Pap 85. 130 p.Google Scholar
Hay, R.L. and Mumpton, F.A., 1977 Geology of zeolites in sedimentary rocks Mineralogy and geology of natural zeolites Washington, DC Mineral Soc Am 5364 10.1515/9781501508585-007.CrossRefGoogle Scholar
Hay, R.L. and Guldman, S.G., 1987 Diagenetic alteration of silicic ash in Searles Lake, California Clays Clay Miner 35 449457 10.1346/CCMN.1987.0350605.CrossRefGoogle Scholar
Hay, R.L. and Sheppard, R.A., 1977 Zeolites in open hydrologic systems Mineralogy and Geology of Natural Zeolites 4 93102 10.1515/9781501508585-009.CrossRefGoogle Scholar
Hawkins, D.B. Sheppard, R.A. Gude, A.J., Sand, L.B. and Mumpton, F.A., 1978 Hydrothermal synthesis of clinoptilolite and comments on the assemblage phillipsite-mordenite Natural zeolites. Occurrence, properties, use 3rd Elmsford, NY Pergamon Pr 337343.Google Scholar
Hemley, J., 1962 Alteration studies in the system Na2O-Al2O3-SiO2-H2O and K2O-Al2O3-SiO3-H2O Geol Soc Am Abstr 1961 .Google Scholar
Hemley, J.J. and Jones, W.R., 1964 Chemical aspects of hydrothermal alteration with emphasis on hydrogen metasomatism Econ Geol 59 538569 10.2113/gsecongeo.59.4.538.CrossRefGoogle Scholar
Hemley, J.J. Hostetler, P.B. Gude, A.J. and Mountjoy, W.T., 1969 Some stability relations of alunite Econ Geol 64 599612 10.2113/gsecongeo.64.6.599.CrossRefGoogle Scholar
Hoffman, J. and Hower, J., 1979 Clay mineral assemblages as low grade metamorphic geothermometers: Application to the thrust faulted disturbed belt of Montana, USA Soc Econ Paleontol Miner Spec Publ 26 5579.Google Scholar
Honda, S. and Muffler, L.J.P., 1970 Hydrothermal alteration in core from research drill hole Y-1, Upper Geyser Basin, Yellowstone National Park, Wyoming Am Mineral 55 17141737.Google Scholar
Hower, J. Eslinger, E.V. Hower, M.E. and Perry, E.A. Jr., 1976 Mechanism of burial metamorphism of argilaceous sediments: Mineralogical and chemical evidence Geol Soc Am Bull 87 725737 10.1130/0016-7606(1976)87<725:MOBMOA>2.0.CO;2.2.0.CO;2>CrossRefGoogle Scholar
Inoue, A. Kohyama, N. Kitagawa, R. and Watanabe, T., 1987 Chemical and morphological evidence for the conversion of smectite to illite Clay Clay Miner 35 111120 10.1346/CCMN.1987.0350203.CrossRefGoogle Scholar
Inoue, A. Velde, B. Meunier, A. and Touchard, G., 1988 Mechanism of illite formation during smectite-to-illite conversion in a hydrothermal system Am Mineral 73 13251334.Google Scholar
Inoue, A. Utada, M. and Wakita, K., 1992 Smectite to illite conversion in natural hydrothermal systems Appl Clay Sci 7 131145 10.1016/0169-1317(92)90035-L.CrossRefGoogle Scholar
Jackson, J. and Mckenzie, D., 1988 The relationship between plate motions and seismic moment tensors, and the rates of active deformation in the Mediterranean and Middle East Geophys J 93 4573 10.1111/j.1365-246X.1988.tb01387.x.CrossRefGoogle Scholar
Kalogeropoulos, S.I. and Mitropoulos, P., 1983 Geochemistry of barites from Milos island (Aegean Sea), Greece N Jb Miner Mh 12 1321.Google Scholar
Kanaris, I.T., 1989 Zeolites of the island of Polyegos Report by IGME, Athens .Google Scholar
Keller, W.D. Reynolds, R.C. and Inoue, A., 1986 Morphology of clay minerals in the smectite to illite conversion series by scanning electron microscopy Clays Clay Miner 34 187197 10.1346/CCMN.1986.0340209.CrossRefGoogle Scholar
Kitsopoulos, K.P., 1995 The mineralogy, geochemistry, physical properties and possible industrial applications of volcanic zeolitic tuffs from Santorini and Polyegos islands, Greece [Ph.D. thesis] UK Univ of Leicester.Google Scholar
Kristmannsdottir, H. Tomasson, J., Sand, L.B. and Mumpton, F.A., 1978 Zeolite zones in geo-fhermal areas in Iceland Natural zeolites Elms-ford, NY Pergamon Pr 277284.Google Scholar
Kusakabe, H. Minato, H. Utada, M. and Yamanaka, T., 1981 Phase relations of clinoptilolite, mordenite, analcime, and albite with increasing pH, sodium ion concentration, and temperature Univ Tokyo Sci Pap, College of General Educ 31 3959.Google Scholar
Lanson, B. and Champion, D., 1991 The I/S to illite reaction in the late stage diagenesis Am J Sei 291 473506.Google Scholar
Markopoulos, T. and Christidis, G., 1989 The genesis of the industrial minerals and rocks of Kimolos Bull Geol Soc Greece 23 2 487498.Google Scholar
Mariner, R.H. and Surdam, R.C., 1970 Alkalinity and formation of zeolites in saline alkaline lakes Science 170 977980 10.1126/science.170.3961.977.CrossRefGoogle ScholarPubMed
Mckenzie, D.P., 1972 Active tectonics of the Mediterranean region Geophys J R Astr Soc 30 109185 10.1111/j.1365-246X.1972.tb02351.x.CrossRefGoogle Scholar
Mercier, J.L., 1981 Extensional-compressional tectonics associated with the Aegean arc: Comparison with the Andean cordillera of south Peru-north Volivia Phil Trans R Soc Lond A300 337355 10.1098/rsta.1981.0068.Google Scholar
Moncure, G.K. Surdam, R.C. and McKague, H.L., 1981 Zeolite diagenesis below Pahute Mesa, Nevada Test Site Clays Clay Miner 29 385396 10.1346/CCMN.1981.0290508.CrossRefGoogle Scholar
Nadeau, P.H. and Reynolds, R.C., 1981 Burial contact metamorphism in the Mancos Shale Clays Clay Miner 29 249259 10.1346/CCMN.1981.0290402.CrossRefGoogle Scholar
Paraskevopoulos, G.M., 1958 Uber den Chemismus und die provinzialen Verhaltnisse der tertiaren und quartaren ergnssgesteine des agaischen raumes und der benachbarten gebiete Tschem Miner Petr Mitt 3F 1372.Google Scholar
Pe-Piper, G. and Tsolis-Katagas, R., 1991 K-rich Mordenite from late Miocene rhyolitic tuffs, island of Samos, Greece Clays Clay Miner 39 239247 10.1346/CCMN.1991.0390303.CrossRefGoogle Scholar
Perry, E. and Hower, J., 1970 Burial Diagenesis in Gulf Coast pelitic sediments Clays Clay Miner 18 165177 10.1346/CCMN.1970.0180306.Google Scholar
Philips, L.V., 1983 Mordenite occurrences in the Marysvale area, Piute County, Utah. A field and experimental study Brigham Young Univ Geol Studies 30 95111.Google Scholar
Ramseyer, K. and Boles, J.R., 1986 Mixed layer illite/smectite minerals in Tertiary sandstones and shales, San Joaquin basin, California Clays Clay Miner 34 115124 10.1346/CCMN.1986.0340202.CrossRefGoogle Scholar
Ransom, B. and Helgeson, H.C., 1989 On the correlation of expandability with mineralogy and layering in mixed layering in mixed-layer clays Clays Clay Miner 37 189191 10.1346/CCMN.1989.0370212.CrossRefGoogle Scholar
Ratterman, N.G. and Surdam, R.C., 1981 Zeolite mineral reactions in a tuff in the Laney member of the Green River Formation, Wyoming Clays Clay Miner 29 365377 10.1346/CCMN.1981.0290506.CrossRefGoogle Scholar
Rye, R.O. Bethke, P.M. and Wasserman, M.D., 1992 The stable isotope geochemistry of acid sulfate alteration Econ Geol 87 225262 10.2113/gsecongeo.87.2.225.CrossRefGoogle Scholar
Seki, Y., 1973 Ionic substitution and stability of mordenite J Geol Soc Jpn 79 669676 10.5575/geosoc.79.669.CrossRefGoogle Scholar
Seki, Y. Onuki, H. Okumara, K. and Takashima, I., 1969 Zeolite distribution in the Katayama geothermal area of Japan Jpn J Geol Geogr 40 6379.Google Scholar
Sheppard, R.A., 1994 Zeolitic diagenesis of tuffs in Miocene lacustrine rocks near Harney Lake, Harney County, Oregon US Geol Surv Bull .Google Scholar
Sheppard RA, Gude, A.J. 3rd. 1973. Zeolites and associated aufhigenic silicate minerals in tuffaceous rocks of the Big Sandy Formation, Mohave County, Arizona. US Geol Surv Prof Pap 830. 36 p.Google Scholar
Sheppard, R.A. and Gude, A.J. 3rd, Fitzpatrick, J.J.. 1988. Distribution, characterisation and genesis of mordenite in Miocene silicic tuffs at Yucca Mountain, Nye County, Nevada. US Geol Surv Bull 1777. 22 p.Google Scholar
Shiraki, R. and Iiyama, T., 1990 Na-K ion exchange reaction between rhyolitic glass and (Na, K) CI aqueous solution under hydrothermal conditions Geochim Cosmochim Acta 54 29232931 10.1016/0016-7037(90)90110-7.CrossRefGoogle Scholar
Skarpelis, N. Economou, M. and Michael, K., 1987 Geology, petrology and polymetallic ore types in a Tertiary volcanosedimentary terrain, Virini-Pessani-Dadia area, West Thrace (Northern Greece) Geol Balcanica 17. 6 3141.Google Scholar
Steiner, A., 1955 Hydrothermal rock alteration Dept Sci Indust Res Bull NZ 117 2126.Google Scholar
Surdam, R.C., 1985 Diagenesis of the Miocene Obispo Formation, Coast Range, California [abstr] 1011.Google Scholar
Tsirambides, A. Filippidis, A. and Kassoli-Fournaki, A., 1993 Zeolitic alteration of Eocene volcaniclastic sediments at Me-taxades, Thrace, Greece Appl Clay Sci 7 509526 10.1016/0169-1317(93)90019-W.CrossRefGoogle Scholar
Tsolis-Katagas, P. and Katagas, C., 1989 Zeolites in pre-caldera pyroclastic rocks of the Santorini Volcano, Aegean Sea, Greece Clays Clay Miner 37 497510 10.1346/CCMN.1989.0370601.CrossRefGoogle Scholar
Tsolis-Katagas, P. and Katagas, C., 1990 Zeolitic diagenesis of Oligocene pyroclastic rocks of the Metaxades area, Thrace, Greece Mineral Mag 54 95103 10.1180/minmag.1990.054.374.10.CrossRefGoogle Scholar
Whitney, G. and Northrop, H.R., 1988 Experimental investigation of the smectite to illite reaction Dual reaction mechanisms and oxygen-isotope systematics 73 7790.Google Scholar
Wirsching, U., 1976 Experiments on hydrothermal alteration processes of rhyolitic glass in closed and “open” system N Jb Miner Mh 5 203213.Google Scholar