عوامل کنترل‌ کننده تبلور تورمالین‌ توده گرانیت- گنایس میلونیتی شمال‌ شرق معدن ژان (استان لرستان)

نوع مقاله : علمی- پژوهشی

نویسندگان

شهرکرد

چکیده

نتایج آنالیز به روش LA-ICP-MS تورمالین های موجود در توده گرانیت- گنایس میلونیتی A-type شمال شرق معدن ژان در پهنه سنندج- سیرجان به سن انتهای پرکامبرین، بیان‌کننده تبلور کانی تورمالین از این مذاب گرانیتی با پیشرفت روند تفریق است. از طرفی، در نمودار عنکبوتی به‌هنجار شده نسبت به میانگین ترکیب گرانیت- گنایس میلونیتی شامل تورمالین های مورد بررسی هم ناهنجاری مثبت و هم ناهنجاری منفی در Eu را می‌بینیم که بیانگر آن است که دانه های تورمالین غالباً توسط دانه های کوارتز و فلدسپار احاطه شده اند. با توجه به شواهد پتروگرافی، هرجا تورمالین در خمیره غالب وجود دارد، بیوتیت و آلانیت به‌صورت محدود هستند و یا اصلاً وجود ندارند. با استفاده از نمودارهای فاز ترکیبی (بیوتیت، تورمالین و مسکویت)، مشخص شد هم‌پوشانی بین تورمالین و بیوتیت های موجود در این گرانیت- گنایس میلونیتی وجود ندارد، که نشان دهنده واکنش ناسازگار بین بیوتیت و تورمالین در این سیستم گرانیت-گنایس میلونیتی است.

کلیدواژه‌ها


Abbott, R.N., 1985. Muscovite-bearing granites in the AFM liquidus projection. The Canadian Mineralogist, 23(4): 553–561.
Abbott, R.N. and Clarke, D.B., 1979. Hypothetical liquidus relationships in the subsystem Al2O3-FeO-MgO projected from quartz, alkali feldspar and plagioclase for a(H2O)≤1. The Canadian Mineralogist, 17(3): 549–560.
Ahmadi-Khalaji, A., Esmaeil, D., Valizadeh, M.V. and Rahimpour-Bonab, H., 2007. Petrology and Geochemistry of the Granitoid Complex of Boroujerd, Sanandaj-Sirjan Zone, Western Iran. Journal of Asian Earth Sciences, 29(5-6): 859-877.
Bacik, P., Uher, P., Cempirek, J. and Vaculovic, T., 2012. Magnesian tourmalines from plagioclase–muscovite–scapolite metaevaporite layers in dolomite marble near Prosetin (Olešnice Unit, Moravicum, Czech Republic). Journal of Geosciences, 57(3): 143–153.
Bea, F., 1996. Residence of REE, Y, Th and U in granites and crustal protoliths; implications for the chemistry of crustal melts. Journal of Petrology, 37(3): 521–552.
Berberian, M. and King, G.C., 1981. Towards a paleogeography and tectonics evolution of Iran. Canadian Journal of earth sciences, 18(2): 210–265.
Broska, I., 2003. REE accessory minerals in the felsic rocks of the West-Carpathians: their distribution, composition and stability. the Carpathians International Conference, Ásványtani, Geokémiai és Közettani Tanszék, Hungary.
Burianek, D. and Novak, M., 2007. Compositional evolution and substitutions in disseminated and nodular tourmaline from leucocratic granites: Examples from the Bohemian Massif, Czech Republic. Lithos, 95(1): 148-164.
Casillas, R., Nagy, G., Pantos, G., Brändle, J. and Forizs, I., 1995. Occurrence of Th, U, Y, Zr and REE bearing accessory minerals in late-Variscan granitic rocks from the Sierra Guadarrama (Spain). European Journal of Mineralogy, 7(2): 989–1006.
Cempirek, J., Houzar, S., Novak, M., Groat, L.A., Bselway, J. and Srein, V., 2013. Crystal structure and compositional evolution of vanadium-rich oxy‑dravite from graphite quartzite at Bitovanky, Czech Republic. Journal of Geosciences, 58(2): 149–162.
Copjakova, R., Skoda, R., Galiova, M.V. and Novak, M., 2013. Distributions of Y + REE and Sc in tourmaline and their implications for the melt evolution; examples from NYF pegmatites of the Trebic Pluton, Moldanubian Zone, Czech Republic. Journal of Geosciences, 58(2): 113–131.
Cuney, M. and Friedrich, M., 1987. Physicochemical and crystalchemical controls on accessory mineral paragenesis in granitoids: implications for uranium metallogenesis. Bulletin Mineralogie, 110(2-3): 235–247.
Dutrow, B.L. and Henry, D.J., 2011. Tourmaline: a geologic DVD. Elements, 7(5): 301–306.
Henry, D.J. and Dutrow, B.L., 1996. Metamorphic tourmaline and its petrologic applications. Reviews in Mineralogy and Geochemistry, 33(1): 503-557.
Hellingwerf, R.H., Gatedal, K., Gallagher, V. and Baker, J.H., 1994. Tourmaline in the central Swedish ore district. Mineralium Deposita, 29(2): 189–205.
Jolliff, B.L., Papike, J.J. and Laul, J.C., 1987. Mineral recorders of pegmatite internal evolution: REE contents of tourmaline from the Bob Ingersoll pegmatite, South Dakota. Geochimica et Cosmochimica Acta, 51(8): 2225–2232.
Kontak, D.J., Dostal, J., Kyser, K. and Archibald, D.A., 2002. A petrological, geochemical, isotopic and fluidinclusion study of 370 Ma pegmatite–aplite sheets, Peggys Cove, Nova Scotia, Canada. The Canadian Mineralogist, 40(5): 1249–1286.
London, D. and Manning, D., 1995. Chemical variation and Significance of tourmaline from SW England. Economic Geology, 90(3): 495–519.
Mohajjel, M. and Fergusson, C.L., 2000. Dextral transpression in Late Cretaceous continental collision, Sanandaj–Sirjan Zone, western Iran. Journal of Structural Geology, 22(8): 1125-1139.
Moradi, A., Shabanian Boroujeni, N. and Davodian Dehkordi, A.R., 2017. Geochemistry of granitoid pluton in northeastern of mine Jan (province Lorestan). Journal of Economic Geology (in Persian with English abstract) (in print).
Moradi, A., Shabanian Boroujeni, N. and Davodian Dehkordi, A.R., 2015. Geochemistry and determination genesis of tourmalines in the mylonitic granite-gneiss pluton in Northeastern of Jan mine (Lorestan province(. Journal of Petrology, 23(6): 65-82 (in Persian with English abstract) (in print).
Novak, M., Povondra, P. and Selway, J.B., 2004. Schorl–oxyschorl to dravite–oxy-dravite tourmaline from granitic pegmatites; examples from the Moldanubicum, Czech Republic. European Journal of Mineraloge, 16(2): 323–333.
Nutman, A.P., Mohajjel, M., Bennett, V.C. and Fergusson, C.L., 2014. Gondwanan Eoarchean Neoproterozoic ancient crustal material in Iran and Turkey: zircon U–Pb–Hf isotopic evidence1. Canadian Journal of Earth Sciences, 51(3): 272–285.
Passchier, C.W. and Trouw, R.A.J., 2010. Atlas of Mylonites- and related microstructures. Springer-Verlag, Berlin Heidelberg, 313 pp.
Pesquera, A., Torres-Ruiz, J., Garci, A., Casco, A., Pedro, P. and Gil crespo, P., 2013. Evaluating the Controls on Tourmaline Formation in Granitic Systems: a Case Study on Peraluminous Granites from the Central Iberian Zone (CIZ),Western Spain. Journal of Petrology, 54(3): 609–634.
Pesquera, A., Torres-Ruiz, J., Gil-Crespo, P.P. and Jiang, S. Y., 2005. Petrographic, chemical and B-isotopic insights into the origin of tourmaline-rich rocks and boron recycling in the Martinamor antiform (Central Iberian Zone, Salamanca, Spain). Journal of Petrology, 46(5): 1013–1044.
Petrik, I. and Broska, I., 1994. Petrology of two granite types from the Tribec Mountains, Western Carpathians: an example of allanite (+magnetite) versus monazite dichotomy. Geological Journal, 29(1): 59–78.
Roda, E., Pesquera, A. and Velasco, F., 1995. Tourmaline in granitic pegmatites and their country rocks, Fregeneda area, Salamanca, Spain. The Canadian Mineralogist, 33(4): 835–848.
Rollinson, H., 1993. Using geochemical data: evolution, presentation, interpretation. Longman Scientific and Technical, London, 352 pp.
Sahandi, M.R., Radfar, J., Hoseinidoust, J. and Mohajjel, M., 2006. Explanatory text of Shazand Geological Quadrangle Map 1:100000. Geological Survey of Iran.
Scaillet, B., Pichavant, M. and Roux, J., 1995. Experimental crystallization of leucogranite magmas. Journal of Petrology, 36(3): 663–705.
Shabanian, N., 2009. Petrology and tectonic setting of granitoid bodies in azna region (sanandaj – sirjanzon, iran). Ph.D. Thesis, University of Esfahan, Esfahan, Iran, 155 pp (in Persian with English abstract).
Shabanian, N., Davoudian, A.R., Khalili, M. and Khodami, M., 2010. Texture evidences imply on dynamic conditions in late-stage to post magmatic crystallization from dynamo-magmatic gnessies of Ghaleh-Dezh, Azna. Iranian Society of Crystallography and Mineralogy, 18(3): 463-472 (in Persian with English abstract).
Stocklin, J., 1968. Structural history and tectonic of Iran, a review. American Association of Petroleum Geologists Bulletin (AAPG), 52(7): 1229-1258
Trumbull, R.B. and Chaussidon, M., 1999. Chemical and boron isotopic composition of magmatic and hydrothermal tourmalines from the Sinceni granitepegmatite system in Swaziland. Chemical Geology, 153(1): 125-137.
Van Hinsberg, V.J., Henry, D.J. and Dutrow, B.L., 2011a. Tourmaline as a petrologic forensic mineral: a unique recorder of its geologic past. Elements, 7(5): 327–332.
Van Hinsberg, V.J., Henry, D.J. and Marschall, H.R., 2011b. Tourmaline: an ideal indicator of its host environment. The Canadian Mineralogist, 49(1): 1–16.
Vernon, R.H., 2004. A practical guide to rock microstructure. Cambridge University press, Cambridge, 594 pp.
Weisbrod, A., Polak, C. and Roy, D., 1986. Experimental study of tourmaline solubility in the system Na–Mg–Al–Si–B–O÷H. Applications to the boron content of natural hydrothermal fluids and the tourmalinization process. International Symposium on Experimental Mineralogy and Geochemistry: Applications to petrology and ore deposits, Nancy CEDEX, Nancy, France.
Whitney, D.L. and Evans, B.W., 2010. Abbreviations for names of rock-forming minerals. American Mineralogist, 95(1): 185-187.
Wilson, M., 1989. Igneous Petrogenesis: A Global Tectonic Approach. Chapman and Hall, London, 446 pp.
Wolf, M.B. and London, D., 1997. Boron in granitic magmas: Stability of tourmaline in equilibrium with biotite and cordierite. Contributions to Mineralogy and Petrology, 130(1): 12–30.
CAPTCHA Image