New evidence on the timing of Southern Neotethys closure from geochronology and geochemistry of Harmanlı region ophiolite (SE Anatolia) and Late Cretaceous granitic rocks Petrology and geochronology of the felsic intrusive and ophiolitic host rocks of SAOB

Article Sidebar

(PDF) (English)

Main Article Content

Nusret Nurlu
Çukurova Üniversitesi

The felsic-intermediate intrusions of the Harmanlı region are situated in proximity to the Tauride thrust front in south-eastern Turkey. The region containing intrusive and ophiolitic rocks indeed plays a crucial role in understanding the magmatic framework of Late Cretaceous felsic-intermediate igneous rocks in the Adıyaman region of south-eastern Anatolia. The geological evolution of south-eastern Anatolia during the Late Cretaceous is unraveled through integrated field observations, whole-rock geochemical, petrographic analyses, U-Pb zircon geochronology, and mineral chemistry of granitic rocks that intrude the Harmanlı region ophiolite (HRO). The intrusions in the HRO, which is part of the SAOB, include felsic-intermediate plutonic/subvolcanic rocks and consist of tonalite, granodiorite, and occasionally granite, with the subvolcanic phase represented by granophyre, aplite, and granite porphyry. Additionally, the mafic plutonic rocks of HRO are predominantly composed of diorite and gabbro, while the subvolcanic phase is characterized by microdiorite and diabase. The new, high-precision LA-ICP-MS U-Pb zircon data provides crystallization ages for the mafic rocks of the Harmanlı ophiolite (gabbro) ranging from 81.7 to 83.8 Ma, while the felsic intrusives (granodiorite) have yielded crystallization ages ranging from 79.5 to 80.8 Ma. The intrusive rocks in the Harmanlı region range from granite to diorite and exhibit metaluminous to slightly peraluminous, calc-alkaline, I-type volcanic arc granite characteristics. On the Chondrite-normalized REE diagram, the intrusive rocks show moderate to high enrichment with indistinct negative Eu anomalies. The intrusive rocks display remarkable depletion in high field strength (HFS) elements (Ta, Nb, Zr, Sm, Y, Hf) and enrichment in large ion lithophile elements (LILEs) (K2O, Rb, Ba, Th) on the ORG-normalized multi-element patterns. The mafic rocks of HRO exhibit distinct characteristics, including (I) depletion in Nb and Pr, (II) enrichment in LILEs (Ce, Rb, K, and Th), and (III) a nearly horizontal pattern of HFSEs (high field strength elements) compared to N-MORB. The utilization of electron microprobe analyses (EMPA) in conjunction with whole-rock major, (trace element, and rare earth element) analyses of the intrusive rocks indicates that these magmatic rocks exhibit a calc-alkaline composition and range from metaluminous to peraluminous. The magmatic arc environment is characterized by the presence of ocean ridge granite-normalized multi-element patterns, tectonomagmatic discrimination, and the biotite geochemistry of the intruded rocks.

Paraules clau
Ophiolite, U-Pb geochronology, Whole-rock, Mineral chemistry, Granite, Adıyaman

Article Details

Com citar
Nurlu, Nusret. «New evidence on the timing of Southern Neotethys closure from geochronology and geochemistry of Harmanlı region ophiolite (SE Anatolia) and Late Cretaceous granitic rocks: Petrology and geochronology of the felsic intrusive and ophiolitic host rocks of SAOB». Geologica Acta, 2025, vol.VOL 23, p. 1-20, https://raco.cat/index.php/GeologicaActa/article/view/10000004891.
Drets
Creative Commons License

Aquesta obra està sota una llicència internacional Creative Commons Reconeixement-CompartirIgual 4.0.

(c) N. Nurlu, 2025


Drets d'autor

opyright

Geologica Acta is the property of the UB, GEO3BCN, IDAEA and UAB. Geologica Acta must be cited for any partial or full reproduction. Papers are distributed under the Attribution-Share Alike Creative Commons License. This license allows anyone to reproduce and disseminate the content of the journal and even make derivative works crediting authorship and provenance and distributing possible derivative works under the same or an equivalent license.

Author Rights

Authors retain the copyright on their papers and are authorized to post them on their own web pages or institutional repositories. The copyright was retained by the journal from the year 2003 until 2009. In all cases, the complete citation and a link to the Digital Object Identifier (DOI) of the article must be included. 

The authors can use excerpts or reproduce illustrations of their papers in other works without prior permission from Geologica Acta provided the source of the paper including the complete citation is fully acknowledged.

Referències

Akgul, B., 1993. Petrographical and petrological features of magmatic rocks in the vicinity of Piran village (Keban-Elazığ). PhD thesis, Flrat University, Elaine, Turkey.

Altherr, R., Holl, A., Hegner, E., Langer, C., Kreuzer, H. 2000. High potassium, calc-alkaline I-type plutonism in the European Variscides: northern Vosges (France) and northern Schwarzwald (Germany). Lithos 50, 51–73.

Anderson J.L., 1996. Status of thermobarometry in granitic batholiths. Earth Environ. Sci. Trans. R Soc. Edinb. 87, 125–138.

Anderson J.L., Barth A.P., Wooden J.L., Mazdab F., 2008. Thermometers and thermobarometers in granitic systems. Rev Mineral Geochem, 69, 1,121–142.

Anderson, J.L., Smith, D.R., 1995. The effects of temperature and fO2 on the Al in hornblende barometer. Am. Mineral. 80, 549–559.

Arculus, R. J., Powell, R., 1986. Source component mixing in the regions of arc magma generation. Journal of Geophysical Research, 91, 5913-5926.

Armstrong J.T., 1988. Quantitative analysis of silicates and oxide minerals: Comparison of Monte-Carlo, ZAF and Phi-Rho-Z procedures. Microbeam Analysis, 239–246.

Asutay, H. J., 1988. The geology of Baskil (Elaz:~) vicinity and petrology of Baskil magmatics. Bulletin of Mineral Research and Exploration (Ankara, Turkey), 107, 46-72.

Bağcı, U., Parlak, O., Höck, V., 2008. Geochemistry and tectonic environment of diverse magma generations forming the crustal units of the Kızıldağ (Hatay) ophiolite southern Turkey. Turkish Journal of Earth Sciences, 17, 43–71.

Barbarin, B. and Didier, J., 1992. Genesis and evolution of mafic microgranular enclaves through various types of interaction between coexisting felsic and mafic magmas. Trans. Roy. Soc. Edinburgh, Earth Sciences, 83, 145-153.

Chappell B.W., 1999. Aluminium saturation in I- and S-type granites and the characterization of fractionated haplogranites. Lithos 46:535–551

Chappell, B.W. and White, A.J.R. 1992. I- and S-Type Granites in the Lachlan Fold Belt. Transactions of the Royal Society of Edinburgh: Earth and Environmental Science, 83, 1-26. http://dx.doi.org/10.1017/S0263593300007720

Chappell, B.W., White, A.J.R., 1974. Two contrasting granite types. Pacific Geology 8, 173–174.

Donovan J.J., Snyder D.A., Rivers M.L., 1993. An Improved Interference Correction for Trace Element Analysis in Microbeam Analysis, 2, 23–28.

Foster, M.D., 1960. Interpretation of composition of trioctaheral micas. U. S. Geological Survey Proffessional Paper, 354, 1–49

Harris, N.B.W., Pearce, J.A., Tindle, A.G., 1986. Geochemical characteristics of collisionzone magmatism. In: Coward, M.P., Rles, A.C. (Eds.), Collision Tectonics. Geological Society, London, Special Publications vol. 19, pp. 67–81.

Irvine T. N., Baragar W. R. A., 2011. A Guide to the Chemical Classification of the Common Volcanic Rocks. Canadian Journal of Earth Sciences. 8(5):523-548. https://doi.org/10.1139/e71-055

Johnson M.C., Rutherford M.J., 1989. Experimental calibration of the aluminum in hornblende geobarometer with application to long valley caldera (California) Volcanic Rocks. Geology, 17, 837–841.

Leake, B.E., Woolley, A.R., Arps C.E.S., Birch, W.D., Gilbert, M.C., Grice, J.D., Hawthorne, F.C., Kato, A., Kisch, H.J., Krivovichev, V.G., Linthout, K., Laird, J., Mandarino, J.A., Maresch, W.V., Nickel, E.H., Rock, N.M.S., Schumacher, J.C., Smith, D.C., Stephenson, N.C.N., Ungaretti, L., Whittaker, E.J.W., and Youzhi, G., 1997. Nomenclature of amphiboles; Report of the Subcomm. on Amphiboles Intern. Miner. Ass., Commiss. New Minerals and Mineral Names. American Mineralogist, 82, 1019–1037.

Locock, A.J., 2014. An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Comput. Geosci., 62, 1–11

Ludwig, K.R., 2003. User's Manual for Isoplot 3.00: A Geochronological Toolkit for Microsoft Excel. Special Publication/Berkeley Geochronology Center 74.

Meschede, M., 1986. A method of discriminating between different types of mid-ocean ridge basalts and continental tholeiites with the Nb-Zr-Y diagram. Chem. Geol., 56: 207-218.

MTA (General Directorate of Mineral Research and Exploration). 1:500.000 scaled 513 Geological Maps of Turkey (Adana map section), Ankara-Turkey. 2002, (in Turkish with 514 Englishabstract) http://www.mta.gov.tr/eng/maps/geological–500000.

Nachit, H., Ibhi, A., Abia, E.H., Ohoud, M. Ben, 2005. Discrimination between primary magmatic biotites, reequilibrated biotites and neoformed biotites 337, 1415–1420. https://doi.org/10.1016/j.crte.2005.09.002

Nurlu, N., 2016. Geochemistry and Tectonic Signifiance of the Tectonomagmatic Units in the Helete (Kahramanmaraş) Region: PhD Thesis: Çukurova University Intitute of Natural and Applied Sciences 1–281.

Nurlu, N., Parlak, O., Robertson, A.H.F., Quadt, A., 2016. Implications of Late Cretaceous U-Pb zircon ages of granitic intrusions cutting ophiolitic and volcanogenic rocks for the assembly of the Tauride allochton in SE Anatolia (Helete area, Kahramanmaraş Region, SE Turkey). Int J Earth Sci, 105, 283–314.

Parlak, O., 2006. Geodynamic significance of granitoid magmatism in southeast Anatolia: Geochemical and geochronological evidence from Göksun-Afşin (Kahramanmaraş, Turkey) region. International Journal of Earth Sciences, vol.95, no.4, pp.609-627.

Parlak, O., Rızaoğlu, T., Bağcı, U., Karaoğlan, F., Höck, V., 2009. Tectonic significance of the geochemistry and petrology of ophiolites in southeast Anatolia. Tectonophysics, 473, 173–187.

Patiño Douce A.E., 1999. What do experiments tell us about the relative contributions of crust and mantle to the origin of granitic magmas? In: InCastro, A, Fernandez, C, Vigneresse JL (eds) Understanding granites. Integrating new and classical techniques. Geol Soc Lond Spec Publ 158:55–75

Paton, C., Hellstrom, J., Paul, B., Woodhead, J., Hergt, J. 2011. Iolite: freeware for the visualisation and processing of mass spectrometric data, J. Anal. At. Spectrom., 26, 2508–2518.

Pearce, J. A,. 1983. Role of the subcontinental lithosphere in magma genesis at active continental margins. In: HAWKESWORTH, C. J. & NORRY, M. J. (eds) Continental Basalts and Mantle Xenoliths. Shiva, Nautwich, 230-249.

Pearce, J. A., 1983. Role of the subcontinental lithosphere in magma genesis at active continental margins. In C. J. Hawkesworth & M. J. Norry (Eds.), Continental basalts and mantle xenoliths,pp. 230–249.

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, pp 79-113

Pearce, J.A., Harris, N.B.W., Tindle, A.G., 1984. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology , v.25, p. 956–983.

Rızaoğlu, T., Parlak, O., Höck, V., İşler, F., 2006. Nature and significance of Late Cretaceous ophiolitic rocks and its relation to the Baskil granitoid in Elazıg˘ region, SE Turkey. In: Robertson, A. H. F. & Mountrakis, D. (eds) Tectonic Development of the Eastern Mediterrranean Region. Geological Society, London, Special Publications, 260, 327–350.

Robertson, A. H. F., Ustaömer, T., 2009. Formation of the Late Palaeozoic Konya Complex and comparable units in southern Turkey by subduction-accretion processes: Implications for the tectonic development of Tethys in the Eastern Mediterranean region. Tectonophysics, 473, 113–148.

Robertson, A.H.F., Parlak, O., Rızaoğlu, T., Ünlügenç, U.C., İnan, N., Taslı, K., Ustaömer, T. 2007. Tectonic evolution of the South Tethyan ocean: evidence from the Eastern Taurus Mountains (Elazığ region, SE Turkey). In A.C., Ries, R.W.H., Butler, & R.H. Graham (Eds.) Deformation of the Continental Crust: The Legacy of Mike Coward (pp. 233–272). Geological Society, Special Publications (Vol. 272). https://doi.org/10.1144/GSL.SP.2007.272.01.14

Şengör, A. M. C., Yılmaz, Y., 1981. Tethyan evolution of Turkey: A platetectonic approach. Tectonophysics, 75, 181–241.

Shand, S.J., 1947. The Eruptive Rocks. 3rd edn. John Wiley, New York, p. 444

Shervais, J.W., 1982. Ti–V plots and the petrogenesis of modern ophiolitic lavas. Earth and Planetary Science Letters 59, 101–118.

Sisson, T.W., Grove, T.L. 1993. Temperatures and H2O contents of low-MgO high-alumina basalts. Contr. Mineral. and Petrol. 113, 167–184. https://doi.org/10.1007/BF00283226

Spear, J.A., 1984. Micas in igneous rocks. Rev Mineral 13:299-356

Wilson, M.,1989. Igneous petrogenesis: A global tectonic approach (pp. 1– 466). London: Chapman and Hall.

Wood, D. A., Joron, J. L., Treuil, M., 1979. A reappraisal of the use of trace elements to classify and discriminate between magma series erupted in different tectonic settings. Earth and Planetary Science Letters, 45, 326-336.

Yazgan, E., Chessex, R., 1991. Geology and tectonic evolution of the southeastern Taurides in the region of Malatya. Bulletin of Turkish Association of Petroleum Geologists, 3, 142.

Yılmaz, Y., 1993. New evidence and model on the evolution of the southeast Anatolian orogen. Geological Society of America Bulletin, 105, 251-271.