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K. Kitsopoulos
K. Kitsopoulos


The Rhodope and Evros areas of the Thrace Region in north-eastern Greece and the adjusted areas in Bulgaria are characterized by wide spread volcanic formations of Upper Eocene to Miocene in age. The volcaniclastic materials associated with such formations have, in some cases, undergone inter alia a notable zeolitization process. The mineralogy of the altered volcaniclastics is often dominated by clinoptilolite -heulandite type of minerals. The Winchester and Floyd (1977) plots indicating rhyodacite/dacite to trachyandesite parent materials, while the similar diagram, as modified by Pearce (1986), indicate andesite to trachyandesite precursors. The alkalinity index (Nb/Y ratio) seems to coincide between the two types of diagrams, but, there is a notable difference of the differentiation index, i.e. the Zr/TiO2 ratio. The Th-Co diagram (Hastie et al., 2007) unfolds a clearer picture for the nature of the precursors and reveals a clear progression of a calc-alkaline to a high-K calc alkaline affinity of the parental volcanic materials.


volcaniclastics; zeolitization; zeolite minerals; geochemical classification; trace elements; Thrace - Evros; Greece;

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Djourova, E., and Aleksiev, B., 1995. Zeolitic rocks in the Northeastern Rhodopes. In: Aleksiev, B (Ed.),

An Excursion to selected Zeolite and Clay deposits in the Eastern Rhodopes. A Guide to the post-Meeting

trip, Sofia Zeolite Meeting ’95, 20-30.

Finlow-Bates, T., and Stumpfl, E. F., 1981. The behaviour of so-called immobile elements in hydrothermally

altered rocks associated with volcanogenic submarine-exhalative ore deposits. Mineralium Deposita

, 319-328.

Hastie, A.R., Kerr, A.C., Pearce, J.A., & Mitchell, S.F., 2007. Classification of altered volcanic island

arc rocks using immobile trace elements: development of the Th-Co discrimination diagram. Journal

of Petrology 48, 2341-2357.

Hastie, A.R., Kerr, A.C., Mitchell, S.F., & Millar, I.L., 2008. Geochemistry and petrogenesis of Cretaceous

oceanic plateau lavas in eastern Jamaica. Lithos, 101, 323-343.

Hastie, A.R., and Kerr, A.C., 2010. Mantle plume or slab window?: Physical and geochemical constraints

on the origin of the Caribbean oceanic plateau. Earth Science Reviews, 98, 283-293.

Jochum, K.P., Nohl, U., Herwig, K., Lammel, E., Stoll, B., & Hofmann, A.W., 2005. GeoRem: A new geochemical

database for reference materials and isotopic standards. Geostandards & Geoanalytical Research

, 333-338.

Kirov, G., Fillipides, A., Tsirambides, A., Tzvetanov, R., & Kassoli-Fournaraki, A., 1990. Zeolite bearing

rocks in Petrota area (Eastern Rhodope Massif, Greece). Geologica Rhodopica 2, 500-511.

Kitsopoulos, K. P., 1991. Volcanic zeolitic tuffs from Greece as an industrial commodity. Useful properties

and possible applications. University of Leicester, MSc Thesis, 110 pp.

Kitsopoulos, K. P., Scott, P.W., Jeffrey, C.A., & Marsh, N.G,, 2001. The mineralogy and geochemistry of

zeolite-bearing volcanics from AkrotiriI (Santorini island) and Polyegos (Milos group of islands)

Greece. Implications for geochemical classification diagrams. Bulletin of the Geological Society of

Greece, vol. XXXIV/3, Proceedings of the 9th International Congress, Athens, 859-865.

Koutles, Th., Kassoli-Fournaraki, A., Filippidis, A., & Tsirambides, A., 1995. Geology and geochemistry

of the Eocene zeolite-bearing volcaniclastic sediments of Metaxades, Thrace, Greece. Estudios Geologicos,

, 19-27.

Le Bas, M.J., Le Maitre, R.W., Streckeisen, A., & Zanettin, B., 1986. A chemical classification of volcanic

rocks based on the total alkali-silica diagram. Journal of Petrology, 27, 745-750.

Le Bas,M. J., Le Maitre, R.W., & Woolley, A. R. (1992).The construction of the total alkali-silica chem-

XLIII, No 5 – 2463

ical classification of volcanic rocks. Mineralogy and Petrology, 46, 1-22.

Le Maitre, R. W., Bateman, P., Dudek, A., Keller J., Lameyre, J., Le Bas, M. J., Sabine, P. A., Schimd,

R., Sorensen, H., Strckeisen, A., Woolley, A. R., & Zanettin, B., 1989. A classification of igneous

rocks and glossary of terms. (Blackwell, Oxford).

Luhr, J. F., Ochoa, C. N., and Savov, I.P., 2010. Tephrochronology, petrology and geochemistry of Late-

Holocene pyroclastic deposits from Volcán de Colima, Mexico. Journal of Volcanology and Geothermal

Research, doi:10.1016/j.jvolgeores.2009.11.007

Marantos, I., Kosharis, G., Perdikatsis, V., & Karantassi, S., 2000. Study on the zeolitic tuffs of Skaloma

Area, Rodopi Prefecture, Thrace. Internal Report, I.G.M.E., Athens, 56 pp.

Marantos, I., Koshiaris, G., Karantassi, S., Perdikatsis, V., and Christidis, G., 2004. Preliminary study of

altered Tertiary volcaniclastic rocks in the area of Asproula, Nea Santa, Rodopi perfecture, Thrace,

NE Greece. Bulletin of the Geological Society of Greece, 35, 454_463.

Marchev, P., Raicheva, R., Downes, H., Vaselli, O., Chiaradia, M., & Moritz, R., 2004. Compositional diversity

of Eocene–Oligocene basaltic magmatism in the Eastern Rhodopes, SE Bulgaria: implications

for genesis and tectonic setting. Tectonophysics, 393, 301-328.

Pearce, J. A., 1996. A user’s guide to basalt discrimination diagrams. In: Wyman, D. A. (ed.) Trace Element

Geochemistry of Volcanic Rocks: Applications for Massive Sulphide Exploration. Geological Association

of Canada, Short Course Notes 12, 79–113.

Peccerillo, R. and Taylor, S. R., 1976. Geochemistry of Eocene calc-alkaline volcanic rocks from the

Kastamonu area, northern Turkey. Contributions to Mineralogy and Petrology, 58, 63-81.

Rickwood, P. C., 1989. Boundary lines within petrologic diagrams which use oxides of major and minor

elements. Lithos, 22, 247-263.

Skarpelis, N., Marantos, I., & Christidis, G., 1993. Zeolites in Oligocene volcanic rocks, Dadia-Lefkimi

area, Thrace, Northern Greece: mineralogy and cation-exchange properties. Bulletin of the Geological

Society of Greece, 28, 305.

Stamatakis, M., Hall, A., Lutat, U., &Walsh, J.N., 1998. Mineralogy, origin and commercial value of the

zeolite-rich tuffs in the Petrota-Pentalofos area, Evros county, Greece. Estudios Geologicos, 54, 3-15.

Tsirambides, A., Kassoli-Fournaraki, A., Filippidis, A., & Soldatos, K., 1989. Preliminary results on

clinoptilolite containingvolcani clastic sediments from Metaxades area, NE Greece. Bulletin of the Geological

Society of Greece, 23, 451-460.

Tsolis-Katagas, P., and Katagas, C., 1990. Zeolitic diagenesis of Oligocene pyroclastic rocks of the Metaxades

area, Thrace, Greece. Mineralogical Magazine, 54, 95-103.

Winchester, J. A., and Floyd, P. A., 1977. Geochemical discrimination of different magma series and their

differentiation products using immobile elements. Chemical Geology, 20, 325-343.

Yanev, Y., Innocenti, F., Manetti, P., & Serri, G., 1998. Upper Eocene – Oligocene collision – related volcanism

in Eastern Rhodopes (Bulgaria ) – Western Thrace (Greece): Petrogenetic Affinity and Geodynamic

Significance. Acta Vulganologica, 10 (2), 279 – 291.


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