نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار، پژوهشکده علوم زمین، سازمان زمینشناسی و اکتشافات معدنی کشور، تهران، ایران
2 کارشناسی ارشد، پژوهشکده علوم زمین، سازمان زمینشناسی و اکتشافات معدنی کشور، مرکز سنندج، سنندج، ایران
3 دکترا، سازمان زمین شناسی و اکتشافات معدنی کشور، مرکز تبریز، تبریز، ایران
چکیده
سنگ های آتشفشانی نئوژن، در جنوب عرب آباد، بلوک لوت رخنمون دارند. سنگ های آتشفشانی مورد مطالعه، گدازه های آتشفشانی ائوسن، الیگوسن و نهشته های تبخیری نئوژن را پوشانده اند. توالی آتشفشانی نئوژن در قاعده شامل برش و توف است که به صورتی تدریجی توسط گدازه-های آندزیتی، تراکی آندزیتی و داسیتی پوشانده شده اند. این گدازه ها دارای بافت آفیریک-فیریک و خمیره میکرولیتی تا هیالومیکرولیتی هستند. این گدازه ها، گرایش ماگمایی کالک آلکالن دارند. در الگوهای عناصر نادر و نمودارهای عنکبوتی، غنی شدگی از LILE و LREE در مقایسه با HREE داشته و تهی شدگی آشکار HFSE دارند، که مشابه ولکانیسم مناطق فرورانش است. در نمودارهای تکتونوماگمایی، این گدازه ها در قلمروی فرورانش و پسابرخورد جای می گیرند. تفسیر داده های ژئوشیمیایی دلالت بر آن دارد که گدازه های مورد مطالعه، احتمالا حاصل ذوب بخشی گوشته لیتوسفری هستند که قبلا توسط مولفه های فرورانش (سیالات و مذاب) رها شده از صفحه اقیانوسی فرورو غنی شده اند. ذوب بخشی پوسته احتمالا در ژنز گدازه های اسیدی نقش داشته است. بنظر می رسد که طی نئوژن، نازک شدگی لیتوسفر سبب ذوب بخشی گوشته لیتوسفری زیرقاره ای شده است. این فرایندها احتمالا پیامد بالا آمدگی آستنوسفر و قطعه شدگی لیتوسفر بوده است.
کلیدواژه‌ها
موضوعات
کتابنگاری
بانهای، ن.، 1396- پترولوژی سنگهای آتشفشانی الیگوسن و نئوژن محدوده ده ته، جنوب دیهوک، بلوک لوت. پایانامه کارشناسی ارشد، پژوهشکده علوم زمین، 102ص.
فریدی، م.، 1384- نقشه زمینشناسی زنوغان با مقیاس1:100.000سازمان زمینشناسی و اکتشافات معدنی کشور، نقشه شماره 7555.
کیلانی جعفری ثانی، ز.، 1396-پترولوژی سنگهای آتشفشانی ائوسن در باختر سه چنگی. پایانامه کارشناسی ارشد، پژوهشکده علوم زمین، 132ص.
خلعتبری جعفری، م.، 1379- نقشه زمینشناسی رباط خوشاب با مقیاس 1:100.000سازمان زمینشناسی و اکتشافات معدنی کشور، نقشه شماره 7557.
References
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.
Abdel-Rahman, A. M., 2002- Mesozoic volcanism in the Middle East: geochemical, isotopic and petrogenetic evolution of extention-related alkali basalts from central Lebanon. Geological Magazine 139: 621-640.
Aldanmaz, E., Pearce, J. A., Thirlwall, M. F. and 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.
Andrew, G., Conly, J. M., Brenen, H. B. and Steven, D. S., 2005- Arc to rift transitional volcanism in the Santa Rosalia region, Baja California Sur Mexico. Volcanology and Geothermal Research 142: 303-341.
Arslan, M., Temizel, I., Abdiog, E., Kolaylı, H., Yücel, C., Boztug, D. and Şen, C., 2013- 40Ar-39Ar dating, whole-rock and Sr–Nd–Pb isotope geochemistry of post-collisional Eocene volcanic rocks in the southern part of the Eastern Pontides (NE Turkey): implications for magma evolution in extension-induced origin. Contrib Mineral Petrol,166:113–142. DOI 10.1007/s00410-013-0868-3.
Ashrafi, N., Jahangiri, J., Hasebe, N. and Eby, G. N., 2018- Petrology, geochemistry and geodynamic setting of Eocene-Oligocene alkaline intrusions from the Alborz-Azerbaijan magmatic belt, NW Iran. Chemie der Erde, https://doi.org/10.1016/j.chemer.2018.10.004.
Aslan, Z., Arslan, M., Temizel, I. and Kaygusuz, A., 2013- K-Ar dating, whole-rock and Sr-Nd isotope geochemistry of calc alkaline volcanic rocks around the Gümüşhane area: implications for post-collisional volcanism in the Eastern Pontides, Northeast Turkey, Miner Petrol, DOI 10.1007/s00710-013-0294-2.
Ayabe, M., Takahashi, K., Shuto, K., Ishimoto, H. and Kawabata, H., 2012- Petrology and geochemistry of adakitic dacites and high-MgO andesites and related calk-alkaline dacites from the Miocene Okoppe volcanic field, N Hllaido, Japan. Journal of Petrology 53: 547-588.
Bailie, R., Rajeshm, H. M. and Gutzmer, J., 2012- Bimodal volcanism at the western margin of the kaapvaal craton in the offer math of the collisional event during the Namaqua-Natal Orogeny: the Koras group, South Africa. Precambrian research, 200, 163-183. Canadian Journal of Earth Sciences 8 (1971): 523-548.
Beccaluva, L., Bianchini, G., Mameli, P. and Natali., C., 2013- Miocene shoshonite volcanism in Sardinia: Implications for magma sources and geodynamic evolution of the central-western Mediterranean. http://dx.doi.org/10.1016/j.lithos.2013.08.006
Camp, V. E. and Griffis R. J., 1982- Character, genesis and tectonic setting of igneous rocks in the Sistan suture zone, Eastern Iran. Lithos, 15, 221-239.
Christainsen, E. H. and McCurry, M., 2008- Contrasting origins of Cenozoic silisic volcanic rock from the western Cordillera of the United State. Bulltain Volcanology 70: 251-267. Doi:10.1007/s00445-007-0138-1.
Coban, H., Karacık, Z. and Ece, O., 2012- Source contamination and tectonomagmatic signals of overlapping Early to Middle Miocene orogenic magmas associated with shallow continental subduction and asthenospheric mantle flows in Western Anatolia: a record from Simav (Kütahya) region. Lithos 140-141, 119-141.
Deering C. D., Bachmann O., Dufek J. and Gravley D. M., 2011- Rift-related transition from andesite to rhyolite volcanism in the Taupo volcanic zone (New Zealand) controlled by crystal melt dynamics in mush zones with variable mineral assemblage. Journal of petrology 52: 2243-2263.
Dilek, Y., Imamverdiyev, N. and Altunkaynak, Ş., 2010- Geochemistry and tectonics of Cenozoic volcanism in the Lesser Caucasus (Azerbaijan) and the peri-Arabian region: collisioninduced mantle dynamics and its magmatic fingerprint. International Geology Review 52 (4-6), 536-578.
Ersoy, Y., Helvacı, C., Sözbilir, H., Erkül, F.and Bozkurt E., 2008- A geochemical approach to Neogene–Quaternary volcanic activity of western Anatolia: An example of episodic bimodal volcanism within the Selendi Basin, Turkey. Chemical Geology 255: 265-282.
Erturk, M. A., Beyarslan, M., Chung, S. L. and Lin, T. H., 2017- Eocene magmatism (Maden Complex) in the Southeast Anatolian orogenic belt:Magma genesis and tectonic implications. Geoscience Frontiers, doi: 10.1016/j.gsf.2017.09.008.
Ghorbani, M. R., 2006- Lead enrichment in Neotethyan volcanic rocks from Iran: the implications of a descending slab. Geochemical Journal 40(6): 557–68.
Gill, R., 2010- Igneous rocks and processes: A practical guide. Wiley Black well, 400p.
Gorton, M. P. and Schandle, E. S., 2000- From continents to island arcs: A geochemical index of tectonic setting for arc-related and within-plate felsic to intermediate volcanic rocks. The Canadian Mineralogist 38: 1065-1073.
Hofmann, A.W., Jochum, K. P., Seufer, M. and white, W. M., 1986- Nb and Pb in oceanic basalts: New constrains on mantle evolution. Earth and Planetary Science Letters 79: 33-45.
Irvine T. N. and Baragar, W. R. A., 1971- A guide to chemical classification of the common volcanic rocks. Canadian Journal of Earth Sciences 8: 523-548.
Karimpour M. H., Stern C.R., Farmer, L., Saadat, S. and Malekezadeh, A., 2011- Review of age, Rb-Sr geochemistry and petrogenesis of Jurassic to Quaternary igneous rocks in Lut Block, eastern Iran. JGeope 1 (1): 19-36.
Kluyver, H. M., Tirrul, R., Chance, P. N., Johns. and Meixner, H. M., 1981- Explanatory text of the Naybandan Quadrangle map 1:250,000, 143p.
Kuscu G. G. and Floyd, P. A., 2000- Mineral compositional and textural evidence for magma mingling in the Saraykent volcanic. Lithos 56: 207-230.
Kuscu, G. G. and Geneli, F., 2010- Review of post-collisional volcanism in the central Anatolian volcanic province (Turkey), with special reference to the Tepekoy volcanic complex. International Journal of Earth Sciences 99: 593-621.
Le Bas, M. J., Le Maitre, R.W., Strecheisen A. and Zanettin B., 1986- A chemical of volcanic rocks classification based on the total alkali-silica diagram. Journal of petrology 27 (3): 745-750.
Li, H., Ling, M. X., Ding, X., Zhang, H., Li, C.Y., Liu, D.Y. and Sun, W. D., 2014- The geochemical characteristics of Haiyang A-type granite complex in Shandxong, eastern China. Lithos, 200-201, 142-156.
Mbowou, G. I. B., Botelho, N. F., Lagmet, C. A. and Ngounouno, I., 2015- Petrology of peraluminous and peralkaline rhyolites from 1 the SE Lake Chad (northernmost Cameroon Line). Journal of African Earth Sciences, DOI: 10.1016/j.jafrearsci.2015.09.015.
Nelson, S.T. and Montana, A., 1992- Sieve-textured plagioclase in volcanic rocks produced by rapid decompression. American Mineral 77: 1242-1249.
Omrani, J., Agard, P., Whitechurch, 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: 380-398.
Pang, k. N., Chung, S. L., Zarrinkoub, M. H., Khatib, M. M., Mohammadi, S. S., Chiu, H.Y., Chu, C.H., Lee, H.Y. and Lo, C. H., 2013- Eocene-Oligocene post collisional magmatism in the lut-sistan region, Eastern Iran: magma genesis and tectonic implication. Lithos http://dx.dio.org/10.1016/j.lithos.2013.05.009.
Pang, k. N., Chung, S. L., Zarrinkoub, M. H., Mohammadi, S.S., Yang, H. M., Chu, C.H., Lee, H.Y. and Lo, C. H., 2012- Age, geochemical characteristic and petrogenesis of late Cenozoic intraplate alkali basalt in the lut-Sistan region, Eastern Iran. Geology, dio: 1016/j.chemgeo.2012.02.020.
Pearce, J. A., Harris, N. B. W. and Tindle, A. G., 1984- Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic Rocks, Journal of Petrology 25: 956-983.
Pfander, J. A., Jachum, K. P., Kozakov, L., Kroner, A., and Todt, W., 2002- Coupled evolution of back arc and island arc-like mafic crust in the late-newprotrozoic Agardagh Tes-Chem ophiolite, central Asia: evidence from trace element and Sr-Nd-Pb isotope data. Contribution to Mineralogy and Petrology 143: 154-17.
Plank, T., 2005- Constraints from Thorium /Lantanum on sedeiment recycling at subduction zones and the evolution of the contients. Journal of Petrology 46: 921-944.
Qian, X., Feng, Q., Yang, W., Wang, Y., Chonglakmani, C. and Monjai, D., 2015- Arc-like volcanic rocks in NW Laos: Geochronological and geochemical constraints and their tectonic implications. Journal of Asian Earth Sciences, 98, 342-357.
Qiang, F., Zhao, Z.F. and Qun, L., 2016- Slab-Mantle Interaction in the Petrogenesis of Andesitic Magmas: Geochemical Evidence from Post collisional Intermediate volcanic rocks in the Dabie Orogen, China. Dio: 10.1093/petrology/egw034.
Renjith, M. L., 2014- Micro-textures in plagioclase from 1994-1995 eruption, Barren Island Volcano: Evidence of dynamic magma plumbing system in the Andaman subduction zone. Geoscience Frontiers, 113-126. http://dx.doi.org/10.1016/j.gsf.2013.03.006.
Rudnick, R. L. and Gao, S., 2003- Composition of the continental crust. In the crust (ed. R. L. Rudnick), 3, Treatise on Geochemistry (eds. H. D. Holland and K. K. Turekian) [M]. Elsevier-pergamon, Oxford 3:1-64.
Shelly, D., 1993- Igneous and metamorphic rocks under the microscope, Chapman and hall, Landon, 445p.
Sun. S. S. and McDonough, W. F., 1989- Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes. Geological society of London, Special Publication 42: 313-345.
Sutcliffe, R. H., Smith, A. R. and Doherty, W., 1990- Mantle derivation of Archaean amphibole-bearing granitoid and associated mafic rocks: evidence from the southern Superior Province, Canada. Contrib. Min. Pet 105: 255-74.
Tarkian, M., Lotfi, M. and Baumann, A., 1983- Tectonic, magmatism and the formation of mineral deposits in the central Lut, east Iran", Ministry of mines and metals, GSI, geodynamic project (Geotraverse) in Iran, No. 51, 357-383.
Temizel, I., Arslan, M., Ruffet, G. and Peucat, J. J., 2012- Petrochemistry, geochronology and Sr-Nd isotopic systematics of the Tertiary collisional and post-collisional volcanic rocks from the Ulubey (Ordu) area, eastern Pontide, NE Turkey: implications for extension-related origin and mantle source characteristics. Lithos 128:126–147
Thirlwall, M. F., Smith, T. E., Graham, A. M., Theodorou, N., Hollings, P., Davidson, J. P. and Arculus, R. J., 1994- High field strength element anomalies in arc lavas; source or process? Journal of petrology 35: 819-838.
Wang, K. L., chung, S. L., O'Reilly, S.Y., Sun, S. S., Shinjo, R. and Chen, C. H., 2004- Geochemical constraints for the genesis of post-collisional magmatism and the geodynamic evolution of the Northern Taiwan Region. Journal of Petrology 45: 975-1011.
Winter, J. D., 2014- Principles of igneous and metamorphic petrology, Second edition, Pearson Education Limited, 737p.
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 Sciences Letter 50: 11-30.
Zhang, S. H., Zhao, Y., Ye, H., Hou, K. J. and Li, C. F., 2012- Early Mesozoic alkaline complexes in the northern North China Craton: Implications for cratonic lithospheric destruction, http://dx.doi.org/10.1016/j.lithos.2012.08.009.
)