نوع مقاله : مقاله پژوهشی
نویسندگان
1 دکترا، گروه زمین شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
2 دانشیار، گروه زمین شناسی، دانشگاه آزاد اسلامی، واحد اسلامشهر، تهران، ایران
3 استادیار، گروه زمین شناسی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران
4 دانشیار، دانشکده مهندسی معدن، دانشگاه صنعتی اصفهان، اصفهان، ایران
چکیده
منطقه مورد مطالعه در استان اصفهان و در شمال خاور روستای علون‌آباد جای گرفته است. این ناحیه بخشی از کمربند ارومیه- دختر در ایران مرکزی است. بیشتر این ناحیه را سنگهای آذرین به سن ائوسن تشکیل داده است که شامل آندزیت بازالت به همراه سنگهای آذرآواری از نوع ایگنیمبریت و توف است. بافت آنها بیشتر پورفیری، میکرولیتی است. پلاژیوکلاز، آمفیبول و کلینوپیروکسن از کانی‌های اصلی قابل تشخیص است. به دلیل عملکرد دگرسانی، کانی‌های ثانویه‌ای مانند کلریت، کلسیت، اپیدوت و اکسیدآهن در این سنگ‌ها ایجاد شده است. تجزیه الکترون‌میکروپروپ نشان‌دهنده ترکیب دیوپسید- اوژیت برای پیروکسنهاست. بر پایه ترکیب شیمیایی کلینوپیروکسن، ماگمای مادر دارای روند کالک‌آلکالن و جایگاه زمین‌ساختی تشکیل آن، در ارتباط با فرورانش است. مطالعه شیمی کلینوپیروکسن بیانگر میزان درصد آب ماگمای میان 2 تا 10 درصد است. زمین‌دمافشارسنجی کلینوپیروکسن‌ها دمای تشکیل 925 تا 1091 درجه سانتی‌گراد و فشار 2 تا 10 کیلوبار را برای تشکیل سنگهای مورد مطالعه نشان میدهد.
کلیدواژه‌ها
References
Adams, G. E. and Bishop, F. C., 1986- The olivine- clinopyroxene geobar- ometer: experimental results in the CaO- FeO- MgOSiO2 system. Contributions to Mineralogy and Petrology, 94(2), 230-237.
Aftabi, A. and Atapour, H., 2000- Regional aspects of shoshonitic volcanism in Iran. Episodes, V. 23(2), 119-125.
Allen, M., Jackson, J. and Walker, R., 2004- Late Cenozoic reorganization of the Arabia-Eurasia collision and the comparison of short-term and long-term deformation rates. Tectonics, 23(2), 1-16.
Amidi, S. M., Emami, M. H. and Michel, R., 1984- Alkaline character of Eocene volcanism in the middle part of Central Iran and its geodynamic situation. Geologische Rundschau, 73(3), 917– 932.
Amini, B. and Amini chehragh, M. R., 2003- 1:100000 Geological map of Kajan. Geological survey and mineral explorations of Iran.
Berger, J., Femenias, O., Mercier, J. C. C. and Demaiffe, D., 2005- Ocean-floor hydrothermal metamorphism in the Limousin ophiolites (western French Massif Central): evidence of a rare preserved Variscan oceanic marker. Journal of Metamorphic Geology, V. 23(9), 795- 812.
Bertrand, P., Sotin, C., Mercier, J. C. and Takahashi, E., 1986- From the simplest chemical system to natural one: garnet peridotite barometry, Contributions to Mineralogy and Petrology, 93(2): 168-178.
Dewey, J. F., Hempton, M. R., Kidd, W. S. F., Saroglu, F. and Sengo, A. M. C., 1986- Shortening of continental lithosphere: The neotectonics of Eastern Anatolia - a young collision zone. In: M.P. Coward and A.C. Ries (Editors), Collision Zone Tectonics. Geological Society of London Special Publication, London, pp. 3-36.
Dilek, Y. and Sandvol, E., 2009- Seismic Structure, Crustal Architecture and Tectonic Evolution of the Anatolian-African Plate Boundary and the Cenozoic Orogenic Belts in the Eastern Mediterranean Region. Geological Society of London Special Publication, 327, 127-160.
Dilek, Y. and Whitney, D. L., 2000- Cenezoic crustal evolution in central Analolia: Extension, magmatism and landscape development, In: Panayides, I., Xenophontos, C., Malpas, J. (Eds), Proceedings of the third international conference on the geology of the eastern Mediterranean: Geological survey department, September 1998, Nicosia-cyprus, 183-142.
Dilek, Y., Imamverdiyev, N. and Altunkaynak, S., 2010- Geochemistry and tectonics of Cenozoic volcanism in the Lesser Caucasus (Azerbaijan) and the peri-Arabian region: collision-induced mantle dynamics and its magmatic fingerprint. International Geology Review, 52(4-6), 536-578.
Dioh, E., Béziat, D., Grégoire, M. and Debat, P., 2009- Origin of rare earth element variations in clinopyroxene from plutonic and associated volcanic rocks from the Foulde basin, Northern Kedougou inlier, Senegal, West Africa. European Journal of Mineralogy, 21(5), 1029- 1043.
Droop, G. T. R., 1987- A general equation for estimating Fe3+ concentrations in ferromagnesian silicates and oxides from microprobe analyses, using stoichiometric criteria. Mineralogical Magazine, 51(361), 431-435.
Emami, M. H., 1981- Geologie de la région de Qom- Arak (Iran), contribution al′ étude dynamique et géochimique du volanisme teriaire de lʹIran. Thése és-sciences naturele , univ. sc. et et Medicate de Grenoble, France, p. 489.
Ghadami, G., Moradian, A. and Mortazavi, M., 2008- Post-collisional Plio–Pleistocene adakitic volcanism in Central Iranian volcanic belt: geochemical and geodynamic implications. Journal of Sciences, Islamic Republic of Iran, 19(3), 223-235.
Hassanzadeh, J., 1993- Metallogenic and tectonomagmatic events in the SE sector of Cenozoic active continental margin of Central Iran (Sharebabak area), Kerman province. Ph.D. thesis, University of California, Los Angeles, USA, p. 204.
Helz, R. T., 1976- Phase relations of basalts in their melting range at PH2O = 5 kb. Part Π Melt compositions, Journal of Petrology, 17, 139 – 193.
Jackson, J. and McKenzie, D., 1984- Active tectonics of the Alpine-Himalayan belt between western Turkey and Pakistan. Geophysical Journal International, 77(1): 185- 264.
Jahangiri, A., 2007- Post-collisional Miocene adakitic volcanism in NW Iran: geochemical and geodynamic implications. Journal of Asian Earth Sciences, 30(3-4), 433-447.
Karimi, S., 2009- Petrology of basalts and diabases in North of Haji abad (SW of Khur, Isfahan province). M.Sc. Thesis. University of Isfahan,Isfahan, Iran, p. 171.
Khodami, M., 2009- Petrology of Plio-Quaternary volcanic rocks in south-east and north-west of Isfahan. PhD Thesis, University of Isfahan, Isfahan, Iran, p. 174 (in Persian with English abstract).
Kushiro, I., 1960- Si- AI relation in clinopyroxenes from igneous rocks. American Journal of Science, 258(5), 548-554.
Le Bas, M. J., 1962- The role of aluminium in igneous clinopyroxenes with relation to their parentage. American Journal of Science, 260(4), 267-288.
Leterrier, J., Maury, R. C., Thonon, P., Girard, D. and Marchal, M., 1982- Clinopyroxene composition as method of identification of the magmatic affinities of paleo-volcanic series. Earth and Planetary Science Letters, 59(1), 139-154.
Li, X., Mo, X., Yu, X., Ding, Y., Huang, X., Wei, P. and He, W., 2013- Petrology and geochemistry of the early Mesozoic pyroxene andesites in the Maixiu Area, West Qinling,China: Products of subduction or syn-collision. Lithos, 172-173, 158-174.
McClusky, S., Balassanian, S., Barka, A., Demir, C., Ergintav, S., Georgiev, G., Gurkan, O., Hamburger, M., Hurst, K., Kahle, H., Kastens, K., Kekelidze, G., King, R., Kotzev, V., Lenk, O., Mahmoud, S., Mishin, A., Ndariya, M., Ouzounis, A., Paradissis, D., Peter, Prilepin, M., Reilinger, R., Sanli, I., Seeger, H., Tealeb, A., Toksoz, M. N. and Veis, G., 2000- Global Positioning System constraints on plate kinematics and dynamics in the eastern Mediterranean and Caucasus. Journal of Geophysical Research, 105(B3),5695-5719.
McClusky, S., Reilinger, R., Mahmoud, S., Ben Sari, D. and Tealeb, A., 2003- GPS constraints on Africa (Nubia) and Arabia plate motions. Geophysical Journal International, 155(1), 126-138.
Morimoto, N., 1988- Nomenclature of pyroxenes. Fortschr mineral, 66, 237-252.
Nakamura, D., 2009- A new formulation of garnet- clinopyroxene geothermometer based on accumulation and statistical analysis of a large experimental data set. Journal of Mettamorphic Geology, V. 27, 495-508.
Nimis, P. A., 1995- A clinopyroxene geobarometer for basaltic systems based on crystal-structure modeling. Contributions to Mineralogy and Petrology, 121(2), 115-125.
Nimis, P. and Taylor, W. R., 2000- Single clinopyroxene thermobarometry for garnet peridotite. Part 1. Calibration and testing of a Cr-in-Cpx barometer and an enstatite-in-Cpx thermometer. Contributions to Mineralogy and Petrology, 139(5), 541-554.
Nimis, P. and Ulmer, P., 1998- Clinopyroxene geobarometry of magmatic rocks. 1. An expanded structural geobarometer for anhydrous and hydrous, basic and ultrabasic system. Contributions to Mineralogy and Petrology, 133(1-2), 122-135.
Nisbet, E. G. and Pearce, J. A., 1977- Clinopyroxene composition of mafic lavas from different tectonic settings. Contributions to Mineralogy and Petrology, 63(2), 149-160.
Omrani, J., Agard, P., Witechurch, H., Benoit, M., Prouteau, G. and Jolivet, L., 2008- Arc magmatism and subduction history beneath the Zagros Mountains, Iran: a new report of adakites and geodynamic consequences. Lithos, 106(3-4), 380-398.
Ottonello, G., 1997- Principles of geochemistry. Columbia University Press, Nw York, USA, p. 894.
Putirka, K., 2008- Thermometers and Barometers for Volcanic Systems. Reviews in Mineralogy and Geochemistry, 69(1), 61-120.
Putirka, K., Johnson, M., Kinzler, R. and Walker, D., 1996- Thermobarometry of mafic igneous rocks based on clinopyroxene-liquid equilibria, 0-30 kbar. Contributions to Mineralogy and Petrology, 123(1), 92-108.
Putirka, K., Mikaelian, H., Ryerson, F. and Shaw, H., 2003- New clinopyroxene-liquid thermobarometers for mafic, evolved, and volatile-bearing lava compositions, with applications to lavas from Tibet and the Snake River Plain, Idaho. American Mineralogist, 88(10), 1542-1554.
Roozbehani, L. and Arvin, M., 2010- Petrography, geochemistry and petrogenesis of rhyolitic and andesitic rocks in Nasir Abad, south-west, Kerman. Journal of Petrology, 1(2), 1-16. (in Persian).
Sayari, M., 2012- APG: An efficient software program for Amp-Pl thermobarometry based on graphical method. Journal of Sciences, Islamic Republic of Iran, 22(4), 345-349.
Sayari, M., 2015- Petrogenesis and evolution of Oligocene-Pliocene volcanism in the central part of Urumieh-Dokhtar Magmatic Arc (NE of Isfahan). Ph.D Thesis, University of Isfahan, Isfahan, Iran, p.195 (in Persian with English abstract).
Soesoo, A., 1997- A multivariate statistical analysis of clinopyroxene composition: empirical coordinates for the crystallization PT-estimations. Geological Society of Sweden (Geologiska Föreningen), 119(1), 55-60.
Spear, F. S., 1995- Metamorphic phase equilibria and pressure - temperature- time paths. Mineralogical Society of American, Washington D.C., USA, p. 799.
Verhooge, J., 1962- Distribution of titanium between silicates and oxydes in igneous rocks. American Journal of Science, 260(2), 211-220.
Whitney, L. and Evans, W., 2010- Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185-187.
Yoshida,T., Okamura, S., Sakamoto, I., Ikeda, Y., Adachi, Y., Kojima, M., Sugawara, M. and Shitahaku, R., 2013- Petrology of felsic rocks dredged from the Myojin Seamount and the Myojin Rift in the north Izu-Bonin arc - Contribution of intra-oceanic subduction system to making continental middle crust. Meeting of International Association of Volcanology and Chemistry of the Earth's Interior , Kagoshima, Japan.
Zarei Sahamieh, Z., and Ebrahimi, S., 2014- Petrology, mineral chemistry and tectono-magmatic setting of volcanic rocks from northeast Farmahin, north of Arak. Journal of Economic Geology, 6(2), 375-392.
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