نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، دانشکده علوم زمین، دانشگاه خوارزمی، تهران، ایران
2 گروه زمین شناسی دانشگاه خوارزمی
3 استاد، دانشکده علوم زمین، دانشگاه خوارزمی، تهران، ایران
4 استادیار، دانشکده علوم زمین، دانشگاه خوارزمی، تهران، ایران
چکیده
سنگ‌های آتشفشانی پرمین البرز مرکزی (شمال خاور بلده- سیاه‌بیشه) در میان سازندهای روته و نسن رخنمون دارند. ترکیب این سنگ‌ها بیشتر در محدوده بازالت هستند و از دید بافتی بیشتر پلاژیوکلاز- فیریک هستند. کانی‌های فرومنیزین همچون کلینوپیروکسن و الیوین فراوانی مودال زیادی ندارند و در مواردی کاملاً دگرسان شده‌اند. بر پایه تجزیه نقطه‌ای کانی‌ها، شیمی کلینوپیروکسن در محدوده دیوپسید جای دارد و ترکیب پلاژیوکلاز لابرادوریتی (50<An%<55) است. نتایج زمیندمافشارسنجی کلینوپیروکسن و پلاژیوکلاز نشانگر فشار کمتر از 5/2 کیلوبار و دمای 1050 تا 1200 درجه سانتی‌گراد است. همچنین شیمی کلینوپیروکسن‌ها با میزان بالای TiO2 (94/4 تا 24/7 درصد وزنی) مشخص می‌شود. داده‌های شیمیایی کلینوپیروکسن نشانگر مذابی با ترکیب بازالتی آلکالن است که در یک جایگاه زمین‌ساخت- ماگمایی درون صفحه‌ای تشکیل شده است. بر پایه داده‌های این پژوهش می‌توان گفت که در زمان پرمین، البرز مرکزی به‌صورت یک حاشیه غیرفعال در جنوب پالئوتتیس جای دارد و فعالیت ماگمایی آن با زمین‌ساخت کششی اواخر پالئوزوئیک در حاشیه شمالی گندوانا و مقارن با مراحل آغازین گسترش نوتتیس قابل تفسیر است.
کلیدواژه‌ها
Angiolini, L., Crippa, G., Muttoni, G. and Pignatti, J., 2013- Guadalupian (Middle Permian) paleobiogeography of the Neotethys Ocean. Gondwana Research, 24: 173-184.
Beccaluva, L., Macciotta, G., Piccardo, G. B. and Zeda, O., 1989- Clinopyroxene composition of ophiolite basalts as petrogenetic indicator. Chemical Geology, 77: 165-182.
Berberian, M. and King, G.C.P., 1981- Towards a paleogeography and tectonic evolution of Iran. Canadian Journal of Earth Sciences, 18: 210-265.
Berra, F. and Angiolini, L., 2014- The Evolution of the Tethys Region throughout the Phanerozoic: A Brief Tectonic Reconstruction. in L. Marlow, C. Kendall and L. Yose, eds., Petroleum systems of the Tethyan region: AAPG Memoir, 106 1-27.
Bertrand, P. and Mercier, J. C. C., 1985- The mutual solubility of coexisting ortho- and clinopyroxene: toward an absolute geothermometer for the natural system? Earth and Planetary Science Letters, 76: 109-122.
Besse, J., Torcq, F., Gallet, Y., Ricou, L. E., Krystyn, L. and Saidi, A., 1998- Late Permian to Late Triassic palaeomagnetic data from Iran: constraints on the migration of the Iranian block through the Tethyan Ocean and initial destruction of Pangaea. Geophysical Journal International, 135: 77-92.
Chauvet, F., Lapierre, H., Maury, R. C.,Bosch, D., Basile, C.,Cotten, J., Brunet, P. and Campillo, S., 2011- Triassic alkaline magmatism of the Hawasina Nappes: Post-breakup melting of the Oman lithospheric mantle modified by the Permian Neotethyan Plume. Lithos, 122: 122-136.
Cook, C., Briggs, R. M.,Smith, I. E. M. and Maas, R., 2005- Petrology and Geochemistry of Intraplate Basalts in the South Auckland Volcanic Field, New Zealand: Evidence for Two Coeval Magma Suites from Distinct Sources. Journal of Petrology, 46: 473-503.
Davis, F. A., Hirschmann, M. M. and Humayun, M., 2011- The composition of the incipient partial melt of garnet peridotite at 3 GPa and the origin of OIB. Earth and Planetary Science Letters, 308: 380-390.
Domeier, M. and Torsvik, T. H., 2014- Plate tectonics in the late Paleozoic. Geoscience Frontiers, 5: 303-350.
Droop, G., 1987- A general equation for estimating Fe3+ concentrations in ferromagnesian silicates and oxides from microprobe analyses, using stoichiometric criteria. Mineralogical Magazine, 51: 431-435.
Feig, S. T., Koepke, J. and Snow, J. E., 2006- Effect of water on tholeiitic basalt phase equilibria: an experimental study under oxidizing conditions. Contributions to Mineralogy and Petrology, 152: 611-638.
Gaetani, G. A., Grove, T. L. and Bryan, W. B., 1993- The influence of water on the petrogenesis of subduction-related igneous rocks. Nature, 365: 332-334.
Gaetani, G. A., Grove, T. L. and Bryan, W. B., 1994- 32. Experimental phase relations of basaltic andesite from hole 839B under hydrous and anhydrous conditions. In: Proceedings of the Ocean Drilling Program, scientific results. pp: 557-563.
Gaetani, M., Angiolini, L., Ueno, K., Nicora, A., Stephenson, M. H., Sciunnach, D., Rettori, R., Price, G. D. and Sabouri, J., 2009- Pennsylvanian–Early Triassic stratigraphy in the Alborz Mountains (Iran). Geological Society, London, Special Publications, 312: 79-128.
Gaetani, M., Dercourt, J. and Vrielynck, B., 2003- The Peri-Tethys programme: achievements and results. Episodes, 26: 79-93.
Golonka, J., 2007- Late Triassic and Early Jurassic palaeogeography of the world. Palaeogeography, Palaeoclimatology, Palaeoecology, 244: 297-307.
Golonka, J. and Bocharova, N. Y., 2000- Hot spot activity and the break-up of Pangea. Palaeogeography, Palaeoclimatology, Palaeoecology, 161: 49-69.
Golonka, J. and Ford, D., 2000- Pangean (Late Carboniferous–Middle Jurassic) paleoenvironment and lithofacies. Palaeogeography, Palaeoclimatology, Palaeoecology, 161: 1-34.
Halliday, A. N., Lee, D. C., Tommasini, S., Davies, G. R., Paslick, C. R., Godfrey Fitton, J. and James, D. E., 1995- Incompatible trace elements in OIB and MORB and source enrichment in the sub-oceanic mantle. Earth and Planetary Science Letters, 133: 379-395.
Humphreys, E. R. and Niu, Y., 2009- On the composition of ocean island basalts (OIB): The effects of lithospheric thickness variation and mantle metasomatism. Lithos, 112: 118-136.
Köhler, T. P. and Brey, G. P., 1990- Calcium exchange between olivine and clinopyroxene calibrated as a geothermobarometer for natural peridotites from 2 to 60 kb with applications. Geochimica et Cosmochimica Acta, 54: 2375-2388.
Lapierre, H., Samper, A., Bosch, D., Maury, R. C.,Béchennec, F., Cotten, J., Demant, A., Brunet, P., Keller, F. and Marcoux, J., 2004- The Tethyan plume: geochemical diversity of Middle Permian basalts from the Oman rifted margin. Lithos, 74: 167-198.
Le Bas, M. J., 1962- The role of aluminum in igneous clinopyroxenes with relation to their parentage. American Journal of Science, 260: 267-288.
Leterrier, J., Maury, R. C.,Thonon, P., Girard, D. and 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.
Maury, R. C., Béchennec, F.,Cotten, J., Caroff, M., Cordey, F. and Marcoux, J., 2003- Middle Permian plume-related magmatism of the Hawasina Nappes and the Arabian Platform: Implications on the evolution of the Neotethyan margin in Oman. Tectonics, 22: 1073.
Morimoto, N., 1989- Nomenclature of pyroxenes. The Canadian Mineralogist, 27: 143-156.
Muttoni, G., Mattei, M., Balini, M., Zanchi, A., Gaetani, M. and Berra, F., 2009- The drift history of Iran from the Ordovician to the Triassic. Geological Society, London, Special Publications, 312: 7-29.
Nimis, P., 1999- Clinopyroxene geobarometry of magmatic rocks. Part 2. Structural geobarometers for basic to acid, tholeiitic and mildly alkaline magmatic systems. Contributions to Mineralogy and Petrology, 135: 62-74.
Nimis, P. and Taylor, W. R., 2000- Single clinopyroxene thermobarometry for garnet peridotites. Part I. Calibration and testing of a Cr-in-Cpx barometer and an enstatite-in-Cpx thermometer. Contributions to Mineralogy and Petrology, 139: 541-554.
Nimis, P. and Ulmer, P., 1998- Clinopyroxene geobarometry of magmatic rocks Part 1: An expanded structural geobarometer for anhydrous and hydrous, basic and ultrabasic systems. Contributions to Mineralogy and Petrology, 133: 122-135.
Nisbet, E. and Pearce, J., 1977- Clinopyroxene composition in mafic lavas from different tectonic settings. Contributions to Mineralogy and Petrology, 63: 149-160.
Pearce, J. A. and Parkinson, I. J., 1993- Trace element models for mantle melting: application to volcanic arc petrogenesis. Geological Society, London, Special Publications, 76: 373-403.
Putirka, K. D., 2005- Igneous thermometers and barometers based on plagioclase + liquid equilibria: Tests of some existing models and new calibrations. In: American Mineralogist. pp: 336-346.
Putirka, K. D., 2008- Thermometers and Barometers for Volcanic Systems. Reviews in Mineralogy and Geochemistry, 69, 1: 61-120.
Putirka, K., Johnson, M., Kinzler, R., Longhi, J. 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.
Ruban, D. A., Al-Husseini, M. I. and Iwasaki, Y., 2007- Review of Middle East Paleozoic plate tectonics. GeoArabia, 12: 35-55.
Saidi, A. and Ghasemi, M. R., 1993- Geological map of Baladeh, scale 1/100000. Geological Survey of Iran.
Şengör, A. M. C., 1990- A new model for the late Palaeozoic—Mesozoic tectonic evolution of Iran and implications for Oman. Geological Society, London, Special Publications, 49: 797-831.
Soesoo, A., 1997- A multivariate statistical analysis of clinopyroxene composition: Empirical coordinates for the crystallisation PT‐estimations. GFF, 119: 55-60.
Stampfli, G. M., 2000- Tethyan oceans. Geological Society, London, Special Publications, 173: 1-23.
Stampfli, G. M. and Borel, G. D., 2002- A plate tectonic model for the Paleozoic and Mesozoic constrained by dynamic plate boundaries and restored synthetic oceanic isochrons. Earth and Planetary Science Letters, 196: 17-33.
Stampfli, G. M., Von Raumer, J. F. and Borel, G. D., 2002- Paleozoic evolution of pre-Variscan terranes: from Gondwana to the Variscan collision. In: Martinez Catalan, J. R., Hatcher, R. D., Arenas, R., Diaz Garcia, F. (eds), Variscan-Appalachian dynamics: the building of late Palaeozoic basement. GSA Special Paper, 364: 263-280.
Stöcklin, J., 1989- Tethys Evolution in the Afghanistan-Pamir-Pakistan Region. In: Tectonic Evolution of the Tethyan Region, Şengör, A. M. C., (Ed.). Springer Netherlands: pp: 241-264.
Tracy, R. and Robinson, P., 1977- Zoned titanian augite in alkali olivine basalt from Tahiti and the nature of titanium substitutions in augite. American Mineralogist, 62: 634-645.
Vahdati Daneshmand, F., 1991- Geological map of Amol, scale 1/250000. Geological Survey of Iran.
Veevers, J. J. and Tewari, R. C., 1995- Permian-Carboniferous and Permian-Triassic magmatism in the rift zone bordering the Tethyan margin of southern Pangea. Geology, 23: 467-470.
Von Raumer, J. F., Stampfli, G. M. and Bussy, F., 2003- Gondwana-derived microcontinents-g the constituents of the Variscan and Alpine collisional orogens. Tectonophysics, 365: 7-22.
Wells, P. A., 1977- Pyroxene thermometry in simple and complex systems. Contributions to Mineralogy and Petrology, 62: 129-139.
Wilson, M., Guiraud, R., Moreau, C. and Bellion, Y. J. C., 1998- Late Permian to Recent magmatic activity on the African-Arabian margin of Tethys. Geological Society, London, Special Publications, 132: 231-263.
Witt-Eickschen, G. and O'Neill, H. S. C., 2005- The effect of temperature on the equilibrium distribution of trace elements between clinopyroxene, orthopyroxene, olivine and spinel in upper mantle peridotite. Chemical Geology, 221: 65-101.
Yoder, H. S. and Tilley, C. E., 1962- Origin of Basalt Magmas: An Experimental Study of Natural and Synthetic Rock Systems. Journal of Petrology, 3: 342-532.
Zhou, M. F., Zhao, J. H., Jiang, C. Y., Gao, J.-F. Wang, W. and Yang, S. H., 2009- OIB-like, heterogeneous mantle sources of Permian basaltic magmatism in the western Tarim Basin, NW China: Implications for a possible Permian large igneous province. Lithos, 113: 583-594.
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