ژئوشیمی، شیمی کانی و ترموبارومتری سنگ‌های آتشفشانی تحت اشباع از سیلیس در منطقه دخان (غرب ساوه)

نویسندگان

1 کارشناس‌ارشد پترولوژی، گروه زمین‌شناسی، دانشکده علوم پایه، دانشگاه بوعلی‌سینا، همدان، ایران

2 استاد گروه زمین‌شناسی، دانشکده علوم پایه، دانشگاه بوعلی‌سینا، همدان، ایران

3 دانشجوی دکترا پترولوژی، گروه زمین‌شناسی، دانشکده علوم پایه، دانشگاه بوعلی‌سینا، همدان، ایران

چکیده

منطقه دخان در غرب نوبران (ساوه)، در حدفاصل دو پهنه ارومیه - دختر و سنندج - سیرجان واقع شده ­است. در این پژوهش ژئوشیمی سنگ کل و شیمی کانی‌های کلینوپیروکسن، الیوین و نفلین در سنگ‌های آتشفشانی کواترنری این منطقه مطالعه شده ­است. از نظر سنگ­نگاری، سنگ‌های مورد مطالعه اغلب ملانفلینیت و الیوین ملانفلینیت هستند. ترکیب شیمیایی سنگ­ها شامل فوئیدیت، تفریت و بازانیت است. این سنگ‌ها به طور نسبی غنی از CaO وMgO  و فقیر ازَ SiO2  و Al2O3 هستند. الیوین آن­ها از نوع کریزولیت و کلینوپیروکسن از نوع دیوپسید است. ماگمای والد این سنگ‌ها از یک گوشته گارنت لرزولیتی متاسوماتیزه شده حاصل شده­ است که با لیتوسفر قاره­ای مقداری آلایش یافته­است. دما- فشارسنجی این سنگ‌ها با استفاده از ترکیب کانی‌ها دمای ۱۲۰۰ تا ۱۲۵۰ درجه سانتی‌گراد و فشار ۵ تا ۱۰ کیلو بار را نشان می­دهد. این سنگ‌ها احتمالا در یک محیط درون قاره­ای پس از فرورانش نئوتتیس و برخورد قـاره­­های آفریقا - عربستان و اورازیا تشکیل شده‌اند.

کلیدواژه‌ها


عنوان مقاله [English]

Geochemistry, mineral chemistry and thermobarometry of silica-undersaturated volcanic rocks in Dokhan area (west Saveh)

نویسندگان [English]

  • N. Shamekhi 1
  • A. A. Sepahi-Gerow 2
  • M. Tahmasbi 3
1 M. Sc. in Petrology, Dept., of Geology, Earth Sciences Faculty, Bu Ali Sina University, Hamadan, Iran
2 Prof., Dept., of Geology, Faculty of Science, Bu Ali Sina University, Hamadan, Iran
3 Ph. D. student in Petrology, Dept., of Geology, Faculty of Science, Bu Ali Sina University, Hamadan, Iran
چکیده [English]

Dokhan region is located in the west of Nobaran (Saveh), between Urumieh-Dokhtar and Sanandaj-Sirjan zones. In this study, the geochemistry of whole rock and the chemistry of clinopyroxene, olivine and nepheline minerals in Dokhan Quaternary volcanic rocks have been studied. From Petrographic aspect, the studied rocks are mostly melanephelinite and olivine melanephelinite. The chemical composition of rocks include foidite, tephrite and basanite. These rocks are relatively rich in CaO and MgO and poor in SiO2 and Al2O3. Their olivine is chrysolite and clinopyroxene is diopside. The parent magma of these rocks is derived from a metasomatized garnet lherzolite mantle that is somewhat contaminated with the continental lithosphere. Temperature-pressure measurement of these rocks using the composition of minerals shows the temperature of 1200° C to 1250 ° C and pressure of 5 to 10 Kb. These rocks are probably formed in the intercontinental environment after the subduction of Neotethys and the collision of the Africa-Arabia and Eurasian continents.

کلیدواژه‌ها [English]

  • Urumieh-Dokhtar
  • Diopside
  • Chrysolite
  • Garnet Lherzolite
  • Melanephelinite
امامی، م. ه (۱۳۷۹) ماگماتیسم در ایران، انتشارات سازمان زمین‌شناسی و اکتشافات معدنی کشور، ۶۲۲ ص.
سپاهی­گرو، ع. ا.، میری، م (۱۳۹۹) مبانی سنگ­شناسی آذرین، انتشارات دانشگاه بوعلی­سینا، ۳۰۷ ص.
خیرخواه، م (۱۳۹۴) ولکانیسم هم‌زمان با برخورد کواترنری در شمال پهنة سنندج - سیرجان، ماگماتیسم در یک فلات فعال کوه‌زایی پترولوژی، نشریه پترولوژی، شماره ۲۳، ص ۶۴-۴۵.
نوگل­سادات، م. ع، هوشمندزاده، ع.، بهروزی، آ.، لطفی، م (۱۳۶۴) نقشه زمین‌شناسی۱:۲۵۰۰۰۰ ساوه، سازمان زمین‌شناسی و اکتشافات معدنی کشور.
Abdel-Fattah, M., Philip, E. N (2004) Cenozoic volcanism in the Middle East, petrogenesis of alkali basalts from northern Lebanon. Geological Magazine, 141: 545–563.
Abu-Hamatteh, Z. S. H (2005) Geochemistry and petrogenesis of mafic magmatic rocks of the Jharol Belt, India: geodynamic implication. Journal of Asian Earth Sciences, 25: 557–581.
Agard, P., Omrani, J., Jolivet, L. Mouthereau, F (2005) Convergence history across Zagros (Iran). constraints from collisional and earlier deformation. International Journal of Earth Sciences, 94: 401–419.
Alavi, M (1980) Tectonostratigraphic evolution of the Zagrosides of Iran. Geology, 8:144–149.
Alavi, M (1994) Tectonics of the Zagros orogenic belt of Iran: new data and interpretations. Tectonophysics, 229: 211–238.
Aldanmaz, E., Pearce, J. A., Thirlwall, M.F., Mitchell, J.G (2000) Petrogenetic evolution of late Cenozoic post-collision volcanism in western Anatolia, Turkey. Journal of Volcanology and Geothermal Research, 102: 67– 95.
Alici Sen, P., Abidin, T., Alain, G (2004) Petrogenetic modelling of Quaternary post- collisional volcanism, a case study of central and eastern Anatolia. Geology Magazine, 141: 81- 98.
Aoki, K., I., Shiba (1973) Pyroxenes from lherzolite inclusions of Itinome-gata, Japan, Lithos, 6: 41-51.
Asran, M. Ezzat, M (2012) The pan-African calc-alkaline granitoids and the associated mafic microgranular enclaves (MME) around Wadi Abu Zawal area, North Eastern desert, Egypt: geology, geochemistry and petrogenesis. Biology and Earth Sciences, 2 (1): 1-16.
Aydin, F., Thompson, R. M., Karsli, O., Uchida, H., Burt, J. B., Downs, R. T (2009) C2/c pyroxene phenocrysts from three potassic series in the Neogene alkaline volcanics, NE Turkey: their crystal chemistry with petrogenetic significance as an indicator of P–T conditions. Contributions to Mineralogy and Petrology, 158: 131–146.
Berberian, M., King, G., C., P (1981) Towards a paleogeography and tectonic evolution of Iran: Canadian Journal of Earth Sciences, 18: 210-265.
Boynton, W. V (1984) Geochemistry of the rare earth elements: meteorite studies. In: Rare Earth Element Geochemistry Elsevier, Amsterdam Ed. Henderson, 63-114.
Cox, K. G., Bell, J. D., Pankhurts, R. J., (translated by Amini S.) (1979) The interpretation of igneous rocks. George Allen and Unwin, Oxford University Press, London, pp: 464.
Curtis, M. P., Leat, T., Riley, B., Storey, I., Millar, D. Randall, J (1999) Middle Cambrian rift-related volcanism in the Ellsworth Mountains, Antarctica: tectonic implications for the palaeo-Pacific margin of Gondwana. Tectonophysics, 304: 275-299.
Dal Negro, A., Molin, G. M., Salviulo, G., Secco, L., Cundari, A., Piccirillo, E. M (1989) Crystal chemistry of clinopyroxene and its petrogenetic significance: A new approach. In A. Boriani, M. Bonafede, G.B. Piccardo, and G.B. Vai, Eds., The lithosphere in Italy: Advances in earth science research. Acc Naz Lincei, Atti Convegni Lincei, 80:105–121.
Dewey, J. F., Pitman, W. C., Ryan, W. B. F., Bonnin, J (1973) Plate tectonic and the evolution of the Alpine system. Geological Society of America Bulletin, 84: 3137–3180.
Frey, F. A., Green, D. H., Roy, S. D (1978) Integrated models of basalt petrogenesis: a study of quartz tholeiites to olivine melilitites from South Estern Australia utilizing geochemical and experimental petrological data. Journal of Petrology, 19: 463-513
Gill, J. B (1981) Orogenic Andesites and Plate Tectonics. Springer, New York, 392p.
Gill, R. (2010) Igneous Rocks and Processes. Wiley-Blackwell, Malaysia, 438p.
Green, D. H (1969) The origin of basaltic and nephelinitic magmas in the Earth’s interior. Tectonophysics, 7: 409–422.
Hanson, G. N (1980) Rare Earth Elements in Petrogenetic Studies of Igneous System. Earth and Planetary Science Letters, 8: 371–406.
Hassanzadeh, J., Wernicke, B. P (2016) The Neotethyan Sanandaj-Sirjan zone of Iran as an archetype for passive margin-arc transitions, Tectonics, 35(3): 586-621.
Helz, R. T (1973) Phase relations of basalts in their melting range at PH2O= 5 kb as a function of oxygen fugacity. Journal of Petrology, 17(2): 139–193.
Kürkcüoğlu, K., Furman, T., Hanan, B (2008) Geochemistry of post-collisional mafic lavas from the North Anatolian Fault zone, Northwestern Turkey, Lithos, 101: 416-434.
Le Bas, M. J., LeMaitre, 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.
Leterrier, J., Maury, R. C., Thonon, P., Girard, D., Marchal, M (1982) Clinopyroxene Composition as a Method of Identification of the Magmatic Affinities of Paleo-Volcanic Series. Earth and Planetary Science Letters, 59: 139-154.
Lopez-Plaza, M., Peinado, M., Lopez-Moro, F. J., Rodriguez-Alonso, M. D., Carnicero, A., Franco, M. P., Gonzalo, j. C. Navidad, M (2007) Contrasting mantle sources and processes involved in a periGondwanan terrane: A case study of pre-Variscan mafic intrusives from the autochthon of the Central Iberian Zone. Geological Society of America, Special Papers, 423: 297-313.
Lustrino, M., Luciani, N. Stagno, V (2019) Fuzzy petrology in the origin of carbonatitic/pseudocarbonatitic Ca-rich ultrabasic magma at Polino (central Italy). Scientific Reports9, 9212.
Marsh, B. D (1998) On the Interpretation of Crystal Size Distributions in Magmatic Systems crystallization. Nature, 4: 553–599.
McBirney, A. R (1993) Igneous petrology, Sec., ed., John and Bartlett. Pub, 507P
Middlemost, E. A. K (1994) Naming materials in the magma/igneous rock system. Earth Science Reviews, 37: 215–224.
Morimoto N., Fabrise J., Ferguson A., Ginzburg I.V., Ross M., Seifert F.A., Zussman J., Akoi K., Gottardi, G (1988) Nomenclature of pyroxenes, Mineralogical Magazine, 52: 535 – 55.
Nakamura, N (1974) Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites. Geochimica et Cosmochimica Acta, 757-775.
Pang, K. N., Chung, S. L., Zarrinkoub, M. H., Chiu, H.-Y. Li, X. H (2014) On the magmatic record of the Makran arc, southeastern Iran: Insights from zircon U-Pb geochronology and bulk-rock geochemistry. Geochemistry, Geophysics, Geosystems, 15: 2151–2169.
Pearce, J. A (1982) Trace element characteristics of lavas from destructive plate boundaries. In: Andesites: orogenic andesites and related rocks, (Ed. Thorpe, R. S.) 525-548.
Pearce, J. A (1983) Role of the sub-continental lithosphere in magma genesis at active continental margins. In. Continental Basalts and Mantle Xenoliths (Hawkesworth, C. J. and Norry, M. J.) 230-249.
Pearce, J. A., Cann, J. R (1973) Tectonic setting of basaltic volcanic rocks determind using trace elements analysis. Earth and Planetary Science Letters, 19(2): 290– 300.
Pilet, S (2015) Generation of low-silica alkaline lavas: petrological constraints, models, and thermal implications. In: Foulger, G. R., Lustrino, M. & King, S. D. The Interdisciplinary Earth. A Volume in Honor of Don L. Anderson, Geol. Soc. Am. Spec. Paper 514 and Geological Society of America Special Paper 514 and American Geophysical Union Special Publication, 71: 281–304.
Rollinson, H (1993) Using Geochemical Data: Evaluation, Presentation, Interpretation, Singapore, Longman, P: 384.
Saghedi, I., Downes, H., Vaselli, O., Szakacs, A., Balogh, K. Pecskay, Z (2004) Postcollisional Tertiary-Quaternary mafic alkali magmatism in the Carpathian-Pannonia region: a review Tectonophysics. Chemical Geology, 393(1-4): 43–62.
Shelley, D., (Translated by Mohamadzadeh, F) (1993) Igneous and metamorphic rocks under the microscope, classification, textures, microstructures and mineral preferred orientations. Chapman and Hall, Unwin London, 445 p.
Smith, E. I., Sanchez, A., Walker, J. D., Wang, K (1999) Geochemistry of mafic magmas in the Hurricane Volcanic field, Utah: implications for small- and large- scale chemical variability of the lithospheric mantle. Journal of Geology, 107: 433- 448.
Soesoo, A (1997) A multivariate statistical analysis of clinopyroxene composition. empirical coordinates for the crystallization PT estimations, GFF, 119(1): 55–60.
Stacey, C., Wade, C (2016) Stratigraphy of the lower Gawler Range Volcanics in the Roopena area, north- eastern Eyre Peninsula. Geological Survey of South Australia. Report Book 2015/00021,428p.
Stern, R. J., Shafaii Moghadam, H., Pirouz, M. Mooney, W (2021) The geodynamic evolution of Iran. Annual Review of Earth and Planetary Sciences, 49: 9–36.
Stocklin, J (1968) Structural history and tectonic of Iran; A Review of the American Association, Petroleum Geologists Bulletin, 52: 1229-1258.
Sun, S. S. McDonough, W. F (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Magmatism in Ocean Basins (Eds. Saunders, A. D., Norry, M. J.) Geological Society, Special Publication, 42: 312– 345.
Thompson, R. N (1974) Some high-pressure pyroxenes. Mineralogical Magazine, 39: 768-787.
Vanhinsbergen, D. J. J., Torsvik, T.H., Schmid, S. M., Mat¸enco, L. C., Maffione, M., Vissers, R. L. M., Gu¨ rer, D. Spakman, W (2020) Orogenic architecture of the Mediterranean region and kinematic reconstructions of its tectonic evolution since the Triassic. Gondwana Research, 81: 79–229.
Vernant, P., Nilforoushan, F., Chery, J., Bayer, R., Djamour, Y., Masson, F., Nankali, H., Ritz, J. F., Sedighi, M., Tavakoli., F (2004) Deciphering oblique shortening of central Alborz in Iran using geodetic data, Earth and Planetary Science Letters, 223: 177-185.
Wager, L. R., Deer, W. A (1939) Geological investigations in East Greenland, Part III. The petrology of the Skaergaard intrusion, Kangerrdlugssuaq, East Greenland. Meddelelserom Gronland, 105(4).
Wass, S. Y., Roger, N. W (1980) Mantle metamorphism- Precursor to alkaline continental volcanism. Geochimica et Cosmochimica Acta, 44: 1811- 1823.
Weaver, B. L (1991) The origin of ocean island basalt end-member compositions: trace element and isotopic constraints. Earth and Planetary Science Letters, 104: 381-397.
Whitney D. L., Evans B. W (2010) Abbreviations for names of rock-forming minerals, American Mineralogist, 95: 185-187
Wilson, M (2007) Igneous Petrogenesis. Springer, Dordrecht, Netherlands.446p.
Wilson, M. Patterson, R (2001) Intra- plate magmatism related to hot fingers in the upper mantle: Evidence from the Tertiary- Quaternary volcanic province of western and central Europe. In: Mantle Plumes: Their identification through time (Eds. Ernst, R. and Buchan, K.) Geological Society of America Special Paper, 352: 37-58.
Wilson, M. Rosenba, J. M. and Dunworth, E. A (1995) Melilitites: partial melts of the thermal boundary layer. Contributions to Mineralogy and Petrology, 119: 181–196.
Winchester, J. A., Floyd, P. A (1977) Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chemical Geology, 20: 325-342.
Winter, C (2001) An Introduction to Igneous and Metamorphic Petrology. Prentice Hall, New York.697p
Yan, J., Zhao J. X (2008) Cenozoic alkali basalts from Jingpohu, NE China: The role of lithosphere asthenosphere interaction. Journal of Asian Earth Sciences, 33: 106-121.
Zanetti, A., Mazzucchelli, M., Rivalenti, G. Vannuci, R (1999) The Finero phlogopite-peridotite massif: An example of subduction-related metasomatism. Contributions to Mineralogy and Petrology, 134: 107-122.