Document Type : Original Research Paper
Authors
- Nasim Askari 1
- reza Zarei Sahamieh 2
- Jafar Omrani 3
- Mohamad Heshem Emami 4
- C., Vaccaro 5
- J. F. Santos 6
1 Ph.D. student, Department of Geology, Faculty of Sciences, Lorestan University, Khorramabad, Iran
2 Professor, Department of Geology, Faculty of Sciences, Lorestan University, Khorramabad, Iran
3 Ph.D., Geological Survey and Mineral Explorations of Iran (GSI), Tehran, Iran
4 Associated Professor, Department of Geology, Faculty of Sciences, Islamic Azad University, Eslam Shahr Branch, Eslam Shahr, Iran
5 Assistant Professor, Department of Physics and Earth Sciences, University of Ferrara, Ferrara, Italy
6 Assistant Professor, Department of Geosciences, University of Aveiro, Aveiro, Portugal
Abstract
Zarrin Mafic dikes, which outcrop in the Western Yazd block, Central Iran, trending NW–SE, emplaced into the Zarrin granitoid. They are sub-alkaline gabbro; characterized by intergranular and mylonitic foliated texture. Geochemical data reveal the Zarrin mafic dikes are from the partial melting lithospheric mantle, a spinel-peridotitic source. Furthermore, they are characterized by 87Sr/86Sr ratio of (0.7044-0.7028) and 144Nd/143Nd ratio of (0.5123- 0.5122), that consistent with the derivation from a lithospheric mantle. Their primitive mantle normalized trace elemental patterns display enrichment in LILEs compared to HFSEs, and positive Rb, Ba, and U but negative Ta, Nb, Th, and Zr anomalies, carrying characteristics subduction-related magmatism and metasomatism by subduction-related fluids. The petrogenesis of the Zarrin mafic dikes are related to melting of the lithospheric mantle, and upwelling asthenospheric mantle in the extensional basin which was associated with the subduction.
Keywords
Main Subjects
References
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Pearce, J. A. and Norry, M. J., 1979- Petrogenetic implications of Ti, Zr, Y, and Nb variations in volcanic rocks. Contributions to Mineralogy and Petrology 69, 33–47.doi: 10.1007/bf00375192.
Peng, P., 2015- Precambrian mafic dyke swarms in the North China Craton and their geological implications. Sci. China (Seris D: Earth Sci.) 58, 649–675.doi: 10.1007/s11430-014-5026-x.
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Piper, J. D.A., Zhang, J. S., Huang, B. C. and Roberts, A. P., 2011- Palaeomagnetism of Precambrian dyke swarms in the North China Shield: the ∼1.8 Ga LIP event and crustal consolidation in late Palaeoproterozoic times. J. Asian Earth Sci. 41, 504–524. doi: 10.1016/j.jseaes.2011.03.010.
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Sengör, A. M. C., 1979- Mid-Mesozoic closure of Permo-Triassic Tethys and its implications. Nature 279, 590–593.doi: 10.1038/279590a0.
Shakerardakani, F., Neubauer, F., Bernroider, A.V.Q., Peytcheva, I., Liu, X., Genser, J., Monfaredi, B. and Masoudi, F., 2017- Geochemical and isotopic evidence for Carboniferous rifting: mafic dykes in the central Sanandaj-Sirjan zone (Dorud-Azna, West Iran), GEOLOGICA CARPATHICA, 68, 3, 229 – 247. 10.1515/geoca-2017-0017.
Shervais, J. W., 1982- Ti–V plots and the petrogenesis of modern and ophiolitic lavas". Earth and Planetary Science Letters 59, 101–118. doi: 10.1016/0012-821x(82)90120-0.
Shinjo, R., Chung, S. L., Kato, Y. and Kimura, M., 1999- Geochemical and Sr–Nd isotopic characteristics of volcanic rocks from the Okinawa Trough and Ryukyu Arc: implications for the evolution of a young, intracontinental back arc basin. J. Geophys. Res. 104 (B5), 10591–10608. doi: 10.1029/1999jb900040.
Sklyarov, E. V., Gladkochub, D. P., Mazukabzov, A. M., Menshagin, Y. V., Watanabe, T. and Pisarevsky, S. A., 2003- Neoproterozoic mafic dike swarms of the Sharyzhalgai metamorphic massif, southern Siberian craton. Precambr. Res. 122, 359–376. doi: 10.1016/s0301-9268(02)00219-x.
Stocklin, J., 1968- Structural history and tectonics of Iran: a review: American Association of Petroleum Geologists Bulletin, v. 52, p. 1229–1258.
Sun, S. S. and McDonough, W. F., 1989- Chemical and isotopic systematics of oceanic basalts: implications for mantle composition andprocesses. In: Saunders A. D. and Norry M. J. (Eds), magmatism in ocean basins. Geological Society of London, Special Publications, 42,313–345.doi: 10.1144/gsl.sp.1989.042.01.19.
Verdel, C., Wernicke, B. P., Hassanzadeh, J. and Guest, B., 2011- A Paleogene extensional arc flare-up in Iran. Tectonics 30, TC3008.doi:1 0.1130/b26102.1.
Verdel, C., Wernicke, B. P., Ramezani, J., Hassanzadeh, J., Renne, P. R. and Spell, T. L., 2007- Geology and thermochronology of Tertiary Cordilleran style metamorphic core complexes in the Saghand region of central Iran. GSA Bull. 119, 961–977. doi:10.1029/2010tc002809.
Vincent, S. J., Morton, A. C., Carter, A., Gibbs, S. and Barabadze, T. G., 2007- Oligocene uplift of the Western Greater Caucasus: an effect of initial Arabia–Eurasia collision. Terra Nova 19, 160–166.doi: 10.1111/j.1365-3121.2007.00731.x.
Weinstein, Y., Navon, O., Altherr, R. and Stein, M., 2006- The role of lithospheric mantle heterogeneity in the generation of Plio-Pleistocene alkali basaltic suites from NW Harrat Ash Shaam (Israel). Journal of Petrology, 47(5), 1017–1050.doi: 10.1093/petrology/egl003.
White, R. S. and Mckenzie, D.P., 1989- Magmatism at rift zones: the generation of volcanic continental margins and flood basalts. Journal of Geophysical Research 94, 7685-7729.doi: 10.1029/jb094ib06p07685.
Wilson, M., 1989- Igneous Petrogenesis, Unwin Hyman London, 466p. ISBN 978-94-010-9388-0.
Winter, J. D., 2001- An Introduction to Igneous and Metamorphic Petrology, Prentice Hall, 697p. ISBN-10: 0132403420
Wood, D. A., 1980- The application of a Th, Hf, Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British tertiary volcanic province. Earth and Planetary Science Letters, 50, 11–30.doi: 10.1016/0012-821X (80)90116-8.
Yang, J. H., Sun, J. F., Chen, F. K., Wilde, S. and Wu, F. Y., 2007- Sources and petrogenesis of Late Triassic dolerite dikes in the Liaodong peninsula: implications for post–collisional lithosphere thinning of the Eastern North China Craton. J. Petrol. 48 (10), 1973–1997.doi: 10.1093/petrology/egm046.
Zhang, C. L., Li, Z. X., Li, X. H. and Ye, H. M., 2009- Neoproterozoic mafic dyke swarms at the northern margin of the Tarim Block, NW China: age, geochemistry, petrogenesis and tectonic implications. J. Asian Earth Sci. 35, 167–179. doi:10.1016/j.jseaes.2009.02.003.
Zhao, J. H., Hu, R. Z., Zhou, M. F. and Liu, S., 2007- Elemental and Sr–Nd–Pb isotopic geochemistry of Mesozoic mafic intrusions in southern Fujian Province, SE China: implications for lithospheric mantle evolution. Geol. Mag. 144, 937–952. doi: 10.1017/S0016756807003834.
Zheng, Y. F., 2012- Metamorphic chemical geodynamics in continental subduction zones, Chemical Geology, 328, 5–48. doi:10.1016/j.chemgeo.2012.02.005.
Zhu, X., Chen, F., Liu, B., Zhang, H. and Zhai, M., 2015- Geochemistry and zircon ages of mafic dikes in the South Qinling, central China: evidence for late Neoproterozoic continental rifting in the northern Yangtze block, Int J Earth Sci (Geol Rundsch) 104:27–44. doi: 10.1007/s00531-014-1056-z.
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