کانی‌شناسی، شیمی‌کانی و دما-فشارسنجی مجموعه سنگ‌های دگرگونی منطقه وهنان واقع در غرب الوند (همدان)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه زمین شناسی، دانشکده علوم، دانشگاه فردوسی مشهد، مشهد، ایران

2 گروه زمین شناسی، دانشکده علوم، دانشگاه بوعلی سینا، همدان، ایران

چکیده

مجموعه سنگ­های دگرگونی ناحیه­ای و مجاورتی منطقه وهنان در غرب شهر همدان و توده نفوذی الوند جزئی از بخش شمالی نوار سنندج-سیرجان هستند. این مجموعه دگرگونی از سنگ­های اسلیت، گارنت میکاشیست، گارنت استارولیت شیست و آمفیبول شیست در سنگ­های دگرگونی ناحیه­ای و شیست­های لکه­دار، میکا هورنفلس، اپیدوت آمفیبول هورنفلس و کردیریت هورنفلس در سنگ­های دگرگونی مجاورتی تشکیل شده­اند. مجموعه کانی­های بررسی شده از این سنگ­ها شامل بیوتیت، گارنت، استارولیت، آمفیبول و کردیریت هستند. تجزیه­های شیمیایی با ریزپردازشگر الکترونی ترکیب گارنت بیشتر در قطب آلماندن، ترکیب بیوتیت­های آهن دوست و آمفیبول­ها از نوع اکتینولیت هستند. استارولیت­ها  با ترکیب غنی از آهن و کردیریت­ها دارای ترکیب میانه (آهن-منیزیم­دار) هستند. دماسنجی براساس تک­کانی بیوتیت در گارنت استارولیت شیست­های لکه­ای دمای حدود C° ۵۵۵  نشان می­دهد و با روش زوج کانی گارنت-بیوتیت، دمایی حدود C° ۵۱۱ مشخص شد همچنین با توجه به حضور استارولیت و نبود کیانیت و سایر کانی­های فشار متوسط- بالا، فشار ۳ تا ۴ کیلوبار براورد می­شود. پایداری مجموعه گارنت + استارولیت در این سنگ­ها نیازمند حضور مقادیری آب در محیط است. نوع دگرگونی منطقه مورد بررسی شباهت به محیط زمین­ساختی نواحی فرورانش دارد.       

کلیدواژه‌ها

عنوان مقاله [English]

Mineralogy, mineral chemistry and thermobarometry of the metamorphic complex of the Vehnan area in the west of Alvand (Hamedan)

نویسندگان [English]

  • Ali Asghar Sepahi-Gerow 1
  • Mahsa Tahmasebi 2
1 Department of Geology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
2 Department of Geology, Faculty of Sciences, Bu -Ali Sina University, Hamedan, Iran
چکیده [English]

The regional and  contact metamorphic rocks of the studied area are located in the west of Hamedan city and Alvand plutonic body as a part of the northern part of the Sanandaj-Sirjan belt. This metamorphic complex consists of slate, garnet mica schist, amphibole schist and tremolitite in regional metamorphic rocks and spotted schists, mica hornfels, epidote amphibole hornfels and cordierite hornfels in contact metamorphic rocks. The analyzed minerals in these rocks include biotite, garnet, staurolite, amphibole and cordierite. EMP chemical analyses indicate that the composition of garnet is almandine, the composition of biotite is siderophyllite and amphibole is actinolite. Staurolite has iron-rich composition and cordierite has intermediate composition (iron-magnesian). Thermometric calculations based on biotite in garnet staurolite schists show a temperature of about 555°C, and the temperature of about 511°C was determined by the garnet-biotite pair method. Due to the presence of staurolite and the absence of kyanite and other medium and high pressure minerals, the pressure of 3 to 4 kilobars is possible. The type of metamorphism of the study area is suggested to be related to a  subduction tectonic environment. The stability of the garnet + staurolite assemblage requires the presence of water in the environment.
 

کلیدواژه‌ها [English]

  • metamorphic
  • minerals
  • Thermobarometry
  • Hamedan
  • subduction

مراجع

  1. [1] Alavi M.,. "Tectonics of the Zagros Orogenic belt of Iran: new data and interpretations", Tectonophysics 229 (1994) 211-238. [doi.org/10.1016/0040-1951(94)90030-2] [DOI:10.1016/0040-1951(94)90030-2]
  2. [1] Alavi M.,. "Tectonics of the Zagros Orogenic belt of Iran: new data and interpretations", Tectonophysics 229 (1994) 211-238. [doi.org/10.1016/0040-1951(94)90030-2] [DOI:10.1016/0040-1951(94)90030-2]
  3. [2] Mohajjel M., Fergusson C.L., and Sahandi M.R.,. "Cretaceous-Tertiary convergence and continental collision, Sanandaj-Sirjan zone, western Iran", Journal of Asian Earth Sciences 21 (2003)394-412. [doi.org/10.1016/S1367-9120(02)00035-4] [DOI:10.1016/S1367-9120(02)00035-4]
  4. [2] Mohajjel M., Fergusson C.L., and Sahandi M.R.,. "Cretaceous-Tertiary convergence and continental collision, Sanandaj-Sirjan zone, western Iran", Journal of Asian Earth Sciences 21 (2003)394-412. [doi.org/10.1016/S1367-9120(02)00035-4] [DOI:10.1016/S1367-9120(02)00035-4]
  5. [3] Berberian M., King G.C.P., "Toward a paleogeography and tectonic evolution of Iran", Canadian Journal of Earth Sciences 18 (1981) 201- 265. [doi.org/10.1139/e81-019 ] [DOI:10.1139/e81-019]
  6. [3] Berberian M., King G.C.P., "Toward a paleogeography and tectonic evolution of Iran", Canadian Journal of Earth Sciences 18 (1981) 201- 265. [doi.org/10.1139/e81-019 ] [DOI:10.1139/e81-019]
  7. [4] Gansser A., "New aspect of the geology in Central-Iran Proc", 4th World Petroleum Congress., Rome, sect. IIA., 15/2 (1955) 280-230.
  8. [4] Gansser A., "New aspect of the geology in Central-Iran Proc", 4th World Petroleum Congress., Rome, sect. IIA., 15/2 (1955) 280-230.
  9. [5] Sepahi A.A., Whitney D.L., Baharifar A.A., "Petrogenesis of andalusite-kyanite-sillimanite veins and host rocks, Sanandaj- Sirjan metamorphic belt Hamadan, Iran", Journal of Metamorphic Geology.,22 (2004) 119-134. [doi.org/10.1111/j.1525-1314.2004.00502.x] [DOI:10.1111/j.1525-1314.2004.00502.x]
  10. [5] Sepahi A.A., Whitney D.L., Baharifar A.A., "Petrogenesis of andalusite-kyanite-sillimanite veins and host rocks, Sanandaj- Sirjan metamorphic belt Hamadan, Iran", Journal of Metamorphic Geology.,22 (2004) 119-134. [doi.org/10.1111/j.1525-1314.2004.00502.x] [DOI:10.1111/j.1525-1314.2004.00502.x]
  11. [6] Sepahi A.A., Jafari S.R., Osanai Y., Shahbazi H., Moazzen M, " Age, petrologic significance and provenance analysis of the Hamedan low pressure migmatites, Sanandaj-Sirjan zone, west Iran", International Geology Review 61 (2019) 1446-1461.[ doi.org/10.1080/00206814.2018.1517392] [DOI:10.1080/00206814.2018.1517392]
  12. [6] Sepahi A.A., Jafari S.R., Osanai Y., Shahbazi H., Moazzen M, " Age, petrologic significance and provenance analysis of the Hamedan low pressure migmatites, Sanandaj-Sirjan zone, west Iran", International Geology Review 61 (2019) 1446-1461.[ doi.org/10.1080/00206814.2018.1517392] [DOI:10.1080/00206814.2018.1517392]
  13. [7] Shahbazi H., Siebel W., Pourmoafee M. Ghorbani M, Sepahi A.A., Shang C.K., Vousoughi- Abedini M., "Geochemistry and U-Pb zircon geochronology of the Alvand Plutonic Complex in Sanandaj - Sirjan Zone (Iran): New evidence for Jurassic magmatism", Journal of Asian Earth Sciences., 39 (2010) 668-683. [doi.org/10.1016/j.jseaes.2010.04.014] [DOI:10.1016/j.jseaes.2010.04.014]
  14. [7] Shahbazi H., Siebel W., Pourmoafee M. Ghorbani M, Sepahi A.A., Shang C.K., Vousoughi- Abedini M., "Geochemistry and U-Pb zircon geochronology of the Alvand Plutonic Complex in Sanandaj - Sirjan Zone (Iran): New evidence for Jurassic magmatism", Journal of Asian Earth Sciences., 39 (2010) 668-683. [doi.org/10.1016/j.jseaes.2010.04.014] [DOI:10.1016/j.jseaes.2010.04.014]
  15. [8] Baharifar A.A., Nang Pang K., Lin Chung S., Yoshiyuki Iizuka Y., " Garnet-Amphibolites Mineralogy and thermobarometry in Aliabad-Damagh (south of Hamedan, Sanandaj-Sirjan Zone)" Petrological Journal 8(2017) 1-20. [doi.org/10.22108/ijp.2017.82011.0]
  16. [8] Baharifar A.A., Nang Pang K., Lin Chung S., Yoshiyuki Iizuka Y., " Garnet-Amphibolites Mineralogy and thermobarometry in Aliabad-Damagh (south of Hamedan, Sanandaj-Sirjan Zone)" Petrological Journal 8(2017) 1-20. [doi.org/10.22108/ijp.2017.82011.0]
  17. [9] Braoud J., Ricou L. E., "L accident du zagros ou main thrust, un charriage et Un coulissement", C. R. Acad- Sci., DS FRA 272 (1971) 203- 206.
  18. [9] Braoud J., Ricou L. E., "L accident du zagros ou main thrust, un charriage et Un coulissement", C. R. Acad- Sci., DS FRA 272 (1971) 203- 206.
  19. [10] Deer W.A., Howie R.A. and Zussman J., "An Introduction to the Rock Forming Minerals", Longman, London.(1992) 528 p.
  20. [10] Deer W.A., Howie R.A. and Zussman J., "An Introduction to the Rock Forming Minerals", Longman, London.(1992) 528 p.
  21. [11] Hendry D.A.F., Chivas A.R., Long J.V.P., Reed S.J.B., "Chemical differences between minerals from mineralizing and barren intrusion from som North American porphyry copper deposits", Contribution to Mineralogy and Petrology 89 (1985) 317-329. [doi.org/10.1007/BF00381554] [DOI:10.1007/BF00381554]
  22. [11] Hendry D.A.F., Chivas A.R., Long J.V.P., Reed S.J.B., "Chemical differences between minerals from mineralizing and barren intrusion from som North American porphyry copper deposits", Contribution to Mineralogy and Petrology 89 (1985) 317-329. [doi.org/10.1007/BF00381554] [DOI:10.1007/BF00381554]
  23. [12] Chivas A.R., "Geochemical evidence for magmatic fluids in porphyry copper mineralization", Contribution to Mineralogy and Petrology 78 (1981) 389-403. [doi.org/10.1007/BF00375201] [DOI:10.1007/BF00375201]
  24. [12] Chivas A.R., "Geochemical evidence for magmatic fluids in porphyry copper mineralization", Contribution to Mineralogy and Petrology 78 (1981) 389-403. [doi.org/10.1007/BF00375201] [DOI:10.1007/BF00375201]
  25. [13] Coogan L. A., Wilson, R. N., Gillis, K. M. and MacLeod, C. J., "Near solidus evolution of oceanic gabbros: insights from amphibole geochemistry", Geochimica et Cosmochimica Acta 65 (2001)[doi,org10,1016/s0016-7037(01)00714-1]
  26. [13] Coogan L. A., Wilson, R. N., Gillis, K. M. and MacLeod, C. J., "Near solidus evolution of oceanic gabbros: insights from amphibole geochemistry", Geochimica et Cosmochimica Acta 65 (2001)[doi,org10,1016/s0016-7037(01)00714-1]
  27. [14] Hawthorne F. C., Oberti R., Harlow G. E., Maresch W. V., Martin R. F., Schumacher J. C. and Welch M. D. "Nomenclature of the amphibole supergroup", American Mineralogist 97 (2012) [DOI:10.2138/am.2012.4276]
  28. [14] Hawthorne F. C., Oberti R., Harlow G. E., Maresch W. V., Martin R. F., Schumacher J. C. and Welch M. D. "Nomenclature of the amphibole supergroup", American Mineralogist 97 (2012) [DOI:10.2138/am.2012.4276]
  29. [Doi.org/100, 2138/am, 2012, 4276]
  30. [Doi.org/100, 2138/am, 2012, 4276]
  31. [15] Pereira M. D., Bea F., "Cordierite producing reactions in the Pena Negra Complex, Alvila Batholith, Central Spain: The key role of cordierite in low-pressure anataxis", Canadian Mineralogist32 32 (1994) 763-780.
  32. [15] Pereira M. D., Bea F., "Cordierite producing reactions in the Pena Negra Complex, Alvila Batholith, Central Spain: The key role of cordierite in low-pressure anataxis", Canadian Mineralogist32 32 (1994) 763-780.
  33. [16] Henry D.J., Guidotti C.V. ,Thomson J.A., "The Tisaturation surface for low-to-medium pressure metapelitic biotites: implications for geothermometry and Ti substitution mechanisms implications for geothermometry and Ti-substitution mechanisms". American Mineralogist Vol. 90 (2005) [DOI:10.2138/am.2005.1498]
  34. [16] Henry D.J., Guidotti C.V. ,Thomson J.A., "The Tisaturation surface for low-to-medium pressure metapelitic biotites: implications for geothermometry and Ti substitution mechanisms implications for geothermometry and Ti-substitution mechanisms". American Mineralogist Vol. 90 (2005) [DOI:10.2138/am.2005.1498]
  35. [doi.org/10.2138/am.2005.1498]
  36. [doi.org/10.2138/am.2005.1498]
  37. [17] Goldman D. S. Y., Albee A.L., "Correlation of Mg/Fe partitioning between garnet and biotite with 18O/16O partitioning between quartz and magnetite", American Journal of Science
  38. [17] Goldman D. S. Y., Albee A.L., "Correlation of Mg/Fe partitioning between garnet and biotite with 18O/16O partitioning between quartz and magnetite", American Journal of Science
  39. 277 (1977) 750-767.
  40. 277 (1977) 750-767.
  41. [18] Holdaway M. J., "Application of new experimental and garnet Margules data to the garnet-biotite geothermometer", American Mineralogist Vol. 85 (2000) 97-131. [DOI:10.2138/am-2000-0701]
  42. [18] Holdaway M. J., "Application of new experimental and garnet Margules data to the garnet-biotite geothermometer", American Mineralogist Vol. 85 (2000) 97-131. [DOI:10.2138/am-2000-0701]
  43. [ doi.org/10.2138/am-2000-0701]
  44. [ doi.org/10.2138/am-2000-0701]
  45. [19] Hodges K. V. Y., Spear F. S., "Geothermometry, geobarometry and the Al2SiO5 triple point at Mt. Moosilauke, New Hampshire", American Mineralogis Vol. 67 (1982) 1118-1134.
  46. [19] Hodges K. V. Y., Spear F. S., "Geothermometry, geobarometry and the Al2SiO5 triple point at Mt. Moosilauke, New Hampshire", American Mineralogis Vol. 67 (1982) 1118-1134.
  47. [20] Perchuk L. L. Y., Larent'eva I. V., "Experimental investigation of exchange equilibria in the system cordierite-garnet-biotite, In: S.K. Saxena (Ed) Kinetics and Equilibrium in Mineral Reactions", Advances in Physical Geochemistry 3 (1983) 199-239. [DOI:10.1007/978-1-4612-5587-1_7]
  48. [20] Perchuk L. L. Y., Larent'eva I. V., "Experimental investigation of exchange equilibria in the system cordierite-garnet-biotite, In: S.K. Saxena (Ed) Kinetics and Equilibrium in Mineral Reactions", Advances in Physical Geochemistry 3 (1983) 199-239. [DOI:10.1007/978-1-4612-5587-1_7]
  49. [21] Ganguly J., Saxena S. K., "Mixing properties of aluminosilicate gamets: constraints from natural and cxperimental data, and applicationst o geothermo-barometry", American Mineralogist
  50. [21] Ganguly J., Saxena S. K., "Mixing properties of aluminosilicate gamets: constraints from natural and cxperimental data, and applicationst o geothermo-barometry", American Mineralogist
  51. 69 (1984) 88-97.
  52. 69 (1984) 88-97.
  53. [22] Perchuk L. L., Aranovich L. Ya., Podlesskii K. K., Lavrenteva I. V., "Precambrain granulites of the Alden Shield, eastern Siberia USSR", Journal Metamorphic Geololgy 3 (1985) 265-310. [ doi.org/10.1111/j.1525-1314.1985.tb00321.x] [DOI:10.1111/j.1525-1314.1985.tb00321.x]
  54. [22] Perchuk L. L., Aranovich L. Ya., Podlesskii K. K., Lavrenteva I. V., "Precambrain granulites of the Alden Shield, eastern Siberia USSR", Journal Metamorphic Geololgy 3 (1985) 265-310. [ doi.org/10.1111/j.1525-1314.1985.tb00321.x] [DOI:10.1111/j.1525-1314.1985.tb00321.x]
  55. [23] Indares A. Y., Martignole J., "Biotite-garnet geothermometry in granulite facies: the influence of Ti and Al in biotite", American Mineralogist 70 (1985) 272-278.
  56. [23] Indares A. Y., Martignole J., "Biotite-garnet geothermometry in granulite facies: the influence of Ti and Al in biotite", American Mineralogist 70 (1985) 272-278.
  57. [24] Dasgupta S., Sengupta P., Guha D., Fukuoka M., "A refined garnet-biotite Fe-Mg exchange
  58. [24] Dasgupta S., Sengupta P., Guha D., Fukuoka M., "A refined garnet-biotite Fe-Mg exchange
  59. geothermometer and its application in amphibolites and granulites", Contributions to Mineralogy and Petrology 109 (1991) 130-137. [doi.org/10.1007/BF00687206] [DOI:10.1007/BF00687206]
  60. geothermometer and its application in amphibolites and granulites", Contributions to Mineralogy and Petrology 109 (1991) 130-137. [doi.org/10.1007/BF00687206] [DOI:10.1007/BF00687206]
  61. [25] Bahattacharya A., Mazumdar A. C., Sen S. K., "Fe-Mg mixing in cordierite: constraints from natural data and implication for cordierite-garnet geothermometry in granulites", American Mineralogist 73 (1992) 338-344.
  62. [25] Bahattacharya A., Mazumdar A. C., Sen S. K., "Fe-Mg mixing in cordierite: constraints from natural data and implication for cordierite-garnet geothermometry in granulites", American Mineralogist 73 (1992) 338-344.
  63. [26] Stüwe K., "Geodynamics of the lithosphere: quantitative description of geological problems", 2nd ed. Berlin, Heidelberg, Dordrecht: Springer-Verlag (2007) 493p. [doi.org/10.1007/978-3-662-04980-8].
  64. [26] Stüwe K., "Geodynamics of the lithosphere: quantitative description of geological problems", 2nd ed. Berlin, Heidelberg, Dordrecht: Springer-Verlag (2007) 493p. [doi.org/10.1007/978-3-662-04980-8].

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  • تاریخ دریافت: 30 بهمن 1401
  • تاریخ بازنگری: 26 اردیبهشت 1402
  • تاریخ پذیرش: 06 خرداد 1402

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