GEOCHEMICAL CHARACTERISTICS OF THE MAFIC ENCLAVES AND THEIR HOSTS FROM NEOGENE ERENLERDAGI VOLCANITES, AROUND YATAGAN VILLAGE AND SAĞLIK TOWN (KONYA), CENTRAL TURKEY


Published: Jul 28, 2016
Keywords:
Erenlerdagı volcanism Mafic enclaves
K. Koçak
Abstract

Late Miocene to Pliocene volcanism is represented by development of lava domes, nuée ardentes and pyroclastic fall and flow (ignimbrites) deposits in the WSW and NW of Konya city. The lava dome contains various mafic microgranular enclaves (MMEs), which have various size (a few cm to a few meters), shape (ellipse/sphere to rounded), with a well-developed chilly zone. The MMEs samples are situated on mostly basaltic andesite and andesite, and a few MME samples on basaltic trachyandesite area while the host rocks are concentrated on dacite and andesite areas. The felsic samples have more fractionated chondrite-normalised REE pattern (La/YbN: 9.5-18.1) than MMEs (6.7-16.0) ones, but both have slightly developed negative Eu anomaly (Eu/Eu*: 0.67-0.89 in felsic rocks, 0.68-0.87 in MMEs). In primitive mantlenormalized spider diagram, the MMEs and felsic rocks have negative Nb, Ta, P and Ti anomalies, indicating some subduction component in their genesis. Based on geochemical data, the MMEs are suggested to have been formed by hybridization of basic magma mingled with partially crystallized felsic magma.

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  • Petrology and Mineralogy
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References
Temel, A., Gundogdu, M.N. and Gourgaud, A., 1998. Petrological and geochemical characteristics
of cenozoic high-K calc-alkaline volcanism in Konya, central Anatolia, Turkey, Journal of
Volcanology and Geothermal Research, 85, 327-354.
Barbarin, B. and Didier, J., 1992. Genesis and Evolution of Mafic Microgranular Enclaves through
Various Types of Interaction between Coexisting Felsic and Mafic Magmas, Transactions of
the Royal Society of Edinburgh-Earth Sciences, 83,145-153.
Boynton, W.V., 1984. Cosmochemistry of the rare earth elements: meteorite studies. In: Henderson,
P., ed., Rare earth elements, Elsevier, 63-114.
Eren, Y., 1993. Eldes - Derbent - Tepeköy - Söğüttözü (Konya) arasinin jeolojisi, Doktora Tezi, 5,
Fen Bilimleri Enstitüsü, Konya, 224 pp. (yayinlanmamis).
Irvine, T.N. and Baragar, W.R., 1971. A guide to the chemical classification of the common igneous
rocks, Canadian Journal of Earth Sciences, 8, 523-548.
Keller, J., Jung, D., Burgath, K. and Wolf, F., 1977. Geologie und petrologie des Neogenen
kalkalkali-vulkanismus von Konya (Erenler Dağ-Alaca Dağ-Massiv Zentral-Anatolian),
Geo. Jb. B., 25, 37-117.
Kempler D. and Garfunkel, Z., 1991. The northeast Mediterranean triple junction from a plate
kinematics point of view, Bull. Tech. Univ., Istanbul, 44, 203-232.
Ketin, İ., 1983, Türkiye Jeolojisine Genel Bir Bakış Istanbul Technical Univercity, Publications,
Istanbul, 595 pp.
Kocak, K., 2006. Hybridization of mafic microgranular enclaves: mineral and whole-rock chemistry
evidence from the Karamadazi Granitoid, Central Turkey, International Journal of Earth
Sciences, 95(4), 587-607.
Kocak, K. and Zedef, 2016. Geochemical characteristics of the lava domes in Yatagan village and
Sağlik town, from Erenlerdagi (Konya, Central Turkey) volcanites, Acta Geobalcanica, 2(1),
-19.
Kurt, H.K., Özkan, A.M. and Kocak, K., 2003. Geology, Petrography and Geochemistry of the
Subduction Related Volcanic Rocks, West of Konya, Central Anatolia, Geological Bulletin
of Turkey, 46(2), 39-51.
65
SiO2
55 60 65
18 20 22 24 SiO2
Y
55 60 65
25 30 35 40 SiO2
La
40 50 60 70 Ce
65
SiO2
55 60 65
5 0.6 0.7 0.8 0.9 1.0 1.1
SiO2
A CNK
55 60 65
6 0.7 0.8 0.9 1.0 1.1 1.2
SiO2
K2O Na2O
65
0 1.5 2.0 2.5 SiO2
Ni
55 60 65
600 800 SiO2
Ba
55 40 60 80 100 Rb
55 60 65
120 130 140 150 160 170 180
SiO2
Zr
55 60 65
18 20 22 24 26 28 30
SiO2
Y
55 20 25 30 35 40 45 50 55
La
55 60 65
44 46 48 50 52 54 56
SiO2
mg
55 60 65
5 0.6 0.7 0.8 0.9 1.0 1.1
SiO2
A CNK
55 0.6 0.7 0.8 0.9 1.0 1.1 1.2
K2O Na2O
Kurt, H., 1994. Petrography and geochemistry of Kadinhani (Konya) area, Central Turkey, PhD th
esis, Glasgow University (unpublished), UK, 191 pp.
McDonough, W.F. and Sun, S.-S., 1995. Composition of the Earth, Chemical Geology, 120, 223-
Meschede, M., 1986. A method of discriminating between different types of mid-ocean ridge basal
ts and continental tholeiites with the Nb-Zr-Y diagram, Chemical Geology, 56, 207-208.
Middlemost, E.A.K., 1994. Naming materials in the magma/igneous rock system, Earth Science
Reviews, 37(1), 215-224.
Özcan, A., Göncüoglu, M.C., Turhan, N., Sentürk, K., Uysal, S. and ve Isık, A., 1990. Konya- Kad
ınhanı-Ilgın dolayının temel jeolojisi, M.T.A. Rapor, No: 9535 (in Turkish, unpublished).
Pearce, T.H., Gorman, B.E. and Birkett, T.C., 1977. The relationship between major element
chemistry and tectonic environment of basic and intermediate volcanic rock, Earth and
Planetary Science Letters, 36, 121-132.
Pearce, J.A., 1982. Trace element characteristics of lavas from destructive plate boundaries; 525-
, In: Thorp, R.S., ed., Andesites: Orogenic Andesites and Related Rocks, John Wiley and
Sons, New York, 724 pp.
Pearce, T.H., Gorman, B.E. and Birkett, T.C., 1977. The relationship between major element
chemistry and tectonic environment of basic and intermediate volcanic rock, Earth and
Planetary Science Letters, 36, 121-132.
Pearce, J.A., Harris, N.B.W. and Tindle, A.G., 1984. Trace element discrimination diagrams for the
tectonic interpretation of granitic rocks, Journal of Petrology, 25, 956-983.
Pearce, J.A., 1983. Role of the sub-continental lithosphere in magma genesis at acrive continental
margins: p. 230-249. In: Hawkesworth, C.J. and Norry, M.J., eds., Continental Basalts and
Mantle Xenoliths, Shiva Publishing Ltd., Cambridge, Mass., 272 pp.
Peccerillo, A. and Taylor, S.R., 1976. Geochemistry of Eocene calcalkaline volcanic rocks from the
Kastamonu area, northern Turkey, Contrib Mineral Petrol, 58, 63-81.
Temel, A., Gündoğdu, M.N. and Gourgaud, A., 1998. Petrological and geochemical characteristics
of Cenozoic high-K calc-alkaline volcanism in Konya, Central Anatolia, Turkey, J. Volcanol.
Geotherm. Res, 85, 327-354.
Watters, B.R. and Pearce, J.A., 1987. Metavolcanic rocks of La Ronge domain in the Churchill
Province, Saskatchewan: geochemical evidence for a volcanic arc origin, Geol. Soc. Lond.,
, 167-182.
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