Mineral chemistry and P-T estimation of formation of garnetschist Mount Argon (west of Angoran Mine)
Subject Areas :
1 -
2 -
3 -
Keywords: Mineral chemistry Metapelitic rocks Mount Argon North West of Iran.,
Abstract :
The Mount Argon garnet schists contain mineral assemblages of quartz, feldspar, mica and garnet. The chemical composition of, plagioclase, biotite, muscovite and garnet in the studied sample shows that plagioclases are albite-rich, white mica flakes are rich in muscovite end-member, phlogopite-annite is the dominant constituent in biotite and chemical composition of the analysed garnets shows that they are almandine and spessartine-rich. Maximum and minimum pressure and temperature of the studied rocks were estimated by using common calculation methods. The minimum and maximum temperature of metamorphism was calculated using Mg-Fe exchange between garnet and biotite. Considering a nominal pressure of 4 kbar, the highest calculated temperature was 615C and the lowest temperature was 380C. These were 644C and 392C for pressure of 8 kbar respectively. Also using multi-equilibria calculations, temperature of 800C and pressure of 9kbar were obtained for the peak of the metamorphism and temperature of 450C and pressure of 7kbar was calculated for the lower part of the metamorphism. . Two phases of metamorphism and deformation affected these rocks. The second deformation was associated with the peak of metamorphism. A decrease in temperature about 351°C with reduced pressure of about 2 Kbars is observed in the metapelitic rocks.
- بهنام، ص.، 1390. پتروگرافی و زمین¬شیمی توده نفوذی دگرگون شده کوه ارغون، پایان‌نامه کارشناسی ارشد دانشگاه زنجان، ایران.
- سازمان زمین¬شناسی کشور، 1383، نقشه تخت سلیمان با مقیاس 1:100000
- ساكي، ع.، ١٣٨٢ .مطالعه دگرگوني ناحيه¬اي و دگرشكلي جنوب غرب ماه¬نشان استان زنجان، رساله كارشناسي ارشد دانشگاه تبريز، ١٠٦.
- ساكي، ع.، موذن، م.، مويد، م. و مجتهدی، م.، ١٣٨١. ارتباط بين تبلور كاني¬ها و دگرشكلي در منطقه جنوب غرب ماه¬نشان، ششمين همايش انجمن زمین¬شناسي ايران.
- ساكي، ع.، موذن م.، مويد م. و مجتهدی، م.، ١٣٨١. واكنش¬هاي دگرگوني و زون¬هاي كانيايي در سنگ¬هاي كالک- سيليكاته منطقه جنوب غرب ماه¬نشان، دهمين گردهمايي انجمن بلورشناسي و كاني¬شناسي ايران، دانشگاه سيستان و بلوچستان.
- سرخوشی، ع.، 1390. بررسی سنگ‌های دگرگونی جنوب‌غرب ماه¬نشان، پایان‌نامه کارشناسی ارشد، دانشگاه زنجان، ایران.
- موذن، م.، ساكي، ع. و مويد، م.، ١٣٨١. دماسنجي سنگ¬هاي متاپليتي جنوب غرب ماه¬نشان به كمك زوج كاني گارنت – بيوتيت. دهمين گردهمايي انجمن بلورشناسي و كاني¬شناسي ايران، دانشگاه سيستان و بلوچستان.
- Berberian, M. and King, G. C. P., 1982. Towards a paleogeography and tectonic evolution of Iran. Canadian Journal of Earth Sciences, 18, 210 – 265.
- Ferry, J. M. and Spear, F. S., 1978. Experimental calibration of the partitioning of Fe and Mg between biotite and garnet. Contribution to Mineralogy and Petrography, 66, 113-117.
- Hajialioghli, R., Moazzen, M., Droop, G. T. R., Oberhansli, R., Bousquet, R., Jahangiri, R. and Ziemann, M., 2007. Serpentine polymorphs and P-T evolution of metaperidotites and serpentinites in the Takab area, NW Iran. Mineralogical Magazine, 71(2), 203-222.
- Hobbs, E. B., Means, W. and Williams, P., 1976. An outline of structure geology. John Wiley and Sons.
- Holland, T. and Powel, R., 1998. An internally consistent data set for phases of petrologic interest. Journal of Metamorphic Geology, 16, 309-343.
- Holdaway, M. J., and Lee, S. M., 1977. Fe-Mg cordierite stability in high-grade pelitic rocks based on experimental theoretical and natural observation S. Contributions to Mineralogy and Petrology, 63, 175-198.
- Hodges, K. V. and Spear, F. S., 1982. Geotherometery, geobrometry and Al2SiO5 triplepoint at Mt. Moosilauke, New Hampshire. American Mineralogist, 67, 1118-11394.
- Indarse, A. and Martingnole, J., 1985. Biotite garnet geothrmometry in the granulite facies: the influence of Ti and Al in biotite. American Mineralogist, 70, 272-278.
- Moazzen, M., 1999. Contact metamorphic processes in the Etive aureole, Scatland. Unpublished Ph.D. thesis, University of Manchester, 392.
- Moazzen, M., Oberhansli, R., Hajialioghli, R., Moller, A., Bousquet, R., Droop. G. T. R. and Jahangiri, A., 2009. Peak and post-peak P-T conditions and fluid composition for scapolite-clinopyroxene-garnet calc-silicates from the Takab area, NW Iran. European Journal of Mineralogy, 21, 149-162.
- Moazzen, M. and Hajialioghli, R., 2008. Zircon SHRIMP dating of mafic migmatites from NW Iran, Reporting the oldest rocks from the Iranian crust. 5th Annual Meeting of AOGS, Busan, Korea, 16-20.
- Moazzen, M., Hajialioghli, R., Moeller, A., Droop, G. T. R., Oberhansli, R., Altenberger, U. and Jahangiri, A., 2013. Oligocene partial melting in the Takab metamorphic complex, NW Iran: Evidence from in situe U-Pb geochronology. Journal of Sciences, Islamic Republic of Iran, 24(3), 217-228.
- Powell, R., Holand T. J. B., 1985. An internally consistent thermodynamic dataset with uncertainities and correlations: 1. Methods and a worked example. J metamorphic Geol, 3, 327-342.
- Perchuk, L. L. and Lavernt'eva, I. V., 1983. Experimental investigation of exchange equilibria in the system cordierite-garnet-biotite. In: Saxena, S. K. (ed) Kinetics and equilibrium in mineral reactions. Springer, New York, 199-239.
- Peterson, T. D. and Peralkaline Nephelinites, L., 1989. Comparative Petrology of Shombole and Oldoinyo. Contributions to Mineralogy and Petrology, 101, 458-478.
- Ramazani, J. and Tucker, R. D., 2003. The Saghand region. Central Iran: U-Pb geochoronology, petrogenesise and implication for Gondwana tectonics American Journal of Science, 303, 622-665.
- Spear, F. S., 1993. Metamorphic phase equilibria and pressure-temperature time paths. Mineralogical Society of America. Monograph, 799.
- Spear, F. S. and Peacock, S. M., 1989. Metamorphic pressure-temperature-time paths. American Geophysical Union, Short Course in Geology, 7, 102.
- Seifert, F., 1978. Bedeutung und Nachweis von thermodynamischen Gleichgewicht und die interpretation von Ungleichgewichten. Fortschr Mineral, 55, 111-134.
- Thompson, A. B., 1976. Mineral reactions in politic rock: 2. Calculetion of some P-T-X (Fe-Mg) phase relation. American Journal of Science, 297, 401-424.
- Vidal, O. and Parra, T., 2000. Exhumation paths of high-pressure metapelites obtained from local equilibria for chlorite±phengite assemblage. Geological Journal, 35, 139-161.
- Will, T. M., 1995. Phase Equilibria in Metamorphic Rocks, Thermodynamic Backgrounds and Petrological Applications, 350.
- Whitney, D. L. and Evans, B. W., 2010. Abbreviations for names of rock forming minerals. American Mineralogist, 95, 185-187.