سنگ‌شناسی، زمین شیمی و خاستگاه زمین ساختی توده نفوذی کانسار آهن همیرد، شمال شرق سمنان

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه دامغان

چکیده

کانسار آهن همیرد در 74 کیلومتری شمال شرق سمنان و در منطقه جام واقع شده است. این منطقه در شمال پهنه ایران مرکزی قرار دارد. رخنمون­های سنگی این منطقه شامل مجموعه سنگ­های آتشفشانی با ترکیب آندزیت تا آندزیت بازالت، توف و آذرآواری­های با سن ائوسن میانی هستند که توده­های نفوذی مونزونیتی و مونزودیوریتی در آنها تزریق شده­اند. کانه­زایی آهن در محل تماس توده نفوذی با سنگ­های آتشفشانی رخ داده است. حضور گسترده هماتیت همراه با مقادیر فرعی مگنتیت، پیریت، باریت و کلسیت از ویژگی­های مهم کانی­زایی در کانسار آهن همیرد است. کانی­زایی به شکل رگه­ای و عدسی­هایی با ترکیب هماتیت و به مقدار کمتر مگنتیت است. بر اساس ویژگی­های زمین شیمیایی، ماهیت ماگمای تشکیل­دهنده توده شبه آتشفشانی همیرد، آهکی- قلیایی و آهکی- قلیایی غنی از پتاسیم بوده و از نوع متاآلومین متعلق به گرانیتوئیدهای نوع I قوس­های آتشفشانی است. غنی­شدگی عناصر LIL نسبت به عناصر HFS و بی­هنجاری منفی Nb و Ti و قرار گرفتن آن­ها در گستره VAG نشان می­دهد که توده نفوذی شبه آتشفشانی همیرد در یک محیط زمین­ساختی ماگمایی قوس آتشفشانی وابسته به فرورانش تشکیل شده است.       

کلیدواژه‌ها

عنوان مقاله [English]

Petrology, geochemistry and tectonic setting of the Hamyerd iron deposit, northeast of Semnan

نویسندگان [English]

  • Damghan University
  • Damghan University
  • Damghan University
چکیده [English]

Hamyerd iron deposit is located about 74 km north east of Semnan, in the Jam area. This area is situated in the northern part of Central Iran structural zone. The outcrops are Middle-Eocene volcanic and pyroclastic rocks with andesite to andesite-basalt and tuff composition, which are intruded by some intrusive bodies of monzonite to monzodiorite composition in this area. Iron mineralization is occurred at the contact between intrusive bodies with volcanic rocks. Widespread presence of hematite with minor contents of magnetite, pyrite, barite, and calcite is the main characteristic of mineralization in Hamyerd deposit. Mineralization is occurred as veins and lenses of hematite with leser amounts of magnetite. According to geochemical properties, the sub-volcanic intrusive body of Hamyerd is calc-alkaline and high K calc-alkaline and meta-aluminous in nature, belonging to I-type volcanic arc granitoids. Enrichment of LIL elements compared with HFS and negative anomaly of Nb and Ti and the samples plot within the VAG field suggest that the sub-volcanic intrusive body of Hamyerd has formed in a volcanic arc environment, related to the subduction zone.

کلیدواژه‌ها [English]

  • petrology
  • Geochemistry
  • volcanic arc
  • Hamyerd iron deposit
  • Semnan

مراجع

  1. [1] Hajibahrami M., Taghipour N., Ghorbani G., "Genesis of the Hamyerd iron deposit, northeastern Semnan: Using fluid inclusions and stable isotopes (S, C, O) studies". Geosciences 25 (2015) 61-70.
  2. [1] Hajibahrami M., Taghipour N., Ghorbani G., "Genesis of the Hamyerd iron deposit, northeastern Semnan: Using fluid inclusions and stable isotopes (S, C, O) studies". Geosciences 25 (2015) 61-70.
  3. [2] Berberian M., King G.G.P., "Toward the paleogoegraphy and tectonic evolution of Iran", Canadian Journal of Earth Sciences 18(2) (1981) 210-265. [DOI:10.1139/e81-019]
  4. [2] Berberian M., King G.G.P., "Toward the paleogoegraphy and tectonic evolution of Iran", Canadian Journal of Earth Sciences 18(2) (1981) 210-265. [DOI:10.1139/e81-019]
  5. [3] Hamrah Tolid Co., Exploration report of Hamyerd Fe deposit (2010).
  6. [3] Hamrah Tolid Co., Exploration report of Hamyerd Fe deposit (2010).
  7. [4] Hamrah Tolid Co., Geological map Scale 1:5000 of Hamyerd Fe deposit (2011).
  8. [4] Hamrah Tolid Co., Geological map Scale 1:5000 of Hamyerd Fe deposit (2011).
  9. [5] Bucher K., Grapes R., "Petrogenesis of Metamorphic Rocks", Springer-Verlag Berlin Heidelberg (2011) 434P. [DOI:10.1007/978-3-540-74169-5]
  10. [5] Bucher K., Grapes R., "Petrogenesis of Metamorphic Rocks", Springer-Verlag Berlin Heidelberg (2011) 434P. [DOI:10.1007/978-3-540-74169-5]
  11. [6] Whitney D.L., Evans B.W., "Abbreviations for names of rock-forming minerals", American Mineralogist 95 (2010) 185-187. [DOI:10.2138/am.2010.3371]
  12. [6] Whitney D.L., Evans B.W., "Abbreviations for names of rock-forming minerals", American Mineralogist 95 (2010) 185-187. [DOI:10.2138/am.2010.3371]
  13. [7] Haynes D.W., Cross K.C., Bills R.T., Reed M.H, "Olympic Dam ore genesis: A fluid mixing model", Economic Geology 90 (1995) 281-307. [DOI:10.2113/gsecongeo.90.2.281]
  14. [7] Haynes D.W., Cross K.C., Bills R.T., Reed M.H, "Olympic Dam ore genesis: A fluid mixing model", Economic Geology 90 (1995) 281-307. [DOI:10.2113/gsecongeo.90.2.281]
  15. [8] Ness W.D., "Introduction to mineralogy", Oxford University Press (2000) 442.
  16. [8] Ness W.D., "Introduction to mineralogy", Oxford University Press (2000) 442.
  17. [9] Ramdohr P., "the ore minerals and their intergrowth", Elsevier (1980).
  18. [9] Ramdohr P., "the ore minerals and their intergrowth", Elsevier (1980).
  19. [10] Velasko F., "Mineralogy and Origin of the skarn from Kala", Economic Geology 76 (1981) 719-727. [DOI:10.2113/gsecongeo.76.3.719]
  20. [10] Velasko F., "Mineralogy and Origin of the skarn from Kala", Economic Geology 76 (1981) 719-727. [DOI:10.2113/gsecongeo.76.3.719]
  21. [11] Middlemost E. A. K., "Magma and magmatic rocks, an introduction to igneous petrology", Longman Group U.K (1994) 73-86.
  22. [11] Middlemost E. A. K., "Magma and magmatic rocks, an introduction to igneous petrology", Longman Group U.K (1994) 73-86.
  23. [12] Streckeisen A., Le Maitre R.W., "A chemical approach to the Modal (QAPF) classification of the igneous rocks", N. J. b. Miner. Abh. 2 (1979) 169-206.
  24. [12] Streckeisen A., Le Maitre R.W., "A chemical approach to the Modal (QAPF) classification of the igneous rocks", N. J. b. Miner. Abh. 2 (1979) 169-206.
  25. [13] Irvine T., Baragar W., "A guide to the chemical classification of the common volcanic rocks", Canadian Journal of Earth Sciences 8 (1971) 523–548. [DOI:10.1139/e71-055]
  26. [13] Irvine T., Baragar W., "A guide to the chemical classification of the common volcanic rocks", Canadian Journal of Earth Sciences 8 (1971) 523–548. [DOI:10.1139/e71-055]
  27. [14] Peccerillo A., Taylor S.R., "Geochemistry of Eocene calcalkaline volcanic rocks from the Kastamonu area, Northern Turkey", Contrib. Mineral. Petrol. 58 (1976) 63-91. [DOI:10.1007/BF00384745]
  28. [14] Peccerillo A., Taylor S.R., "Geochemistry of Eocene calcalkaline volcanic rocks from the Kastamonu area, Northern Turkey", Contrib. Mineral. Petrol. 58 (1976) 63-91. [DOI:10.1007/BF00384745]
  29. [15] Maniar P. D., Piccoli P. M., "Tectonic discriminations of granitoids", Geol. Soc. Amer. Bull. 101 (1989) 635-643.

    https://doi.org/10.1130/0016-7606(1989)1012.3.CO;2 [DOI:10.1130/0016-7606(1989)1012.3.CO;2]
  30. [15] Maniar P. D., Piccoli P. M., "Tectonic discriminations of granitoids", Geol. Soc. Amer. Bull. 101 (1989) 635-643.

    https://doi.org/10.1130/0016-7606(1989)1012.3.CO;2 [DOI:10.1130/0016-7606(1989)1012.3.CO;2]
  31. [16] Chappell B. W., White A. J. R., "I and S-type granites in the Lachlan Fold Belt, Trans", R. Soc. Edinb. Earth Science 83 (1992) 1-26. [DOI:10.1017/S0263593300007720]
  32. [16] Chappell B. W., White A. J. R., "I and S-type granites in the Lachlan Fold Belt, Trans", R. Soc. Edinb. Earth Science 83 (1992) 1-26. [DOI:10.1017/S0263593300007720]
  33. [17] Boynton N.V., "Cosmochemistry of the rare earth elements, condensation and evaporation processes", In: Lipin, B.R., MacKay, G.A. (Eds.), Geochemistry and Mineralogy of Rare Earths, Mineralogical Society of America: Reviews in Mineralogy 21(1989) 1–24.
  34. [17] Boynton N.V., "Cosmochemistry of the rare earth elements, condensation and evaporation processes", In: Lipin, B.R., MacKay, G.A. (Eds.), Geochemistry and Mineralogy of Rare Earths, Mineralogical Society of America: Reviews in Mineralogy 21(1989) 1–24.
  35. [18] Sun S.S., McDonough W. F., "A chemical and isotopic systematics of oceanic basalts: Implication for mantle composition and processes", Geological Society of London Special Publication 42 (1989) 313 – 345. [DOI:10.1144/GSL.SP.1989.042.01.19]
  36. [18] Sun S.S., McDonough W. F., "A chemical and isotopic systematics of oceanic basalts: Implication for mantle composition and processes", Geological Society of London Special Publication 42 (1989) 313 – 345. [DOI:10.1144/GSL.SP.1989.042.01.19]
  37. [19] Pearce J.A., "Role of the sub-continental lithosphere in magma genesis at active continental margins", In: Hawkesworth, C.J., Norry, M.J. (Eds.), Continental Basaltsand Mantle Xenoliths. Shiva Publications Ltd, Cheshire, U.K (1983) 230–249.
  38. [19] Pearce J.A., "Role of the sub-continental lithosphere in magma genesis at active continental margins", In: Hawkesworth, C.J., Norry, M.J. (Eds.), Continental Basaltsand Mantle Xenoliths. Shiva Publications Ltd, Cheshire, U.K (1983) 230–249.
  39. [20] Defant M. J., Drummond M. S., "Derivation of some modern arc magmas by melting of young subducted lithosphere", Nature 347 (1990), 662-665. [DOI:10.1038/347662a0]
  40. [20] Defant M. J., Drummond M. S., "Derivation of some modern arc magmas by melting of young subducted lithosphere", Nature 347 (1990), 662-665. [DOI:10.1038/347662a0]
  41. [21] Temel A., Gundogdu M.N., Gourgaud A., "petrological and geochemical characteristics of Cenozoic high-K calc-alkaline volcanism in konya, central Anatolia, turkey", J. Volcano, Geoth. Res., 85 (1998) 327-354. [DOI:10.1016/S0377-0273(98)00062-6]
  42. [21] Temel A., Gundogdu M.N., Gourgaud A., "petrological and geochemical characteristics of Cenozoic high-K calc-alkaline volcanism in konya, central Anatolia, turkey", J. Volcano, Geoth. Res., 85 (1998) 327-354. [DOI:10.1016/S0377-0273(98)00062-6]
  43. [22] Fitton J.G., James D., Kempton P.P.D., Ormerod D.S., Leeman W.P., "the role of lithospheric mantle in the generation of late Cenozoic basic magmas in the western united states", Journal of Petrology (1988) 331-349. [DOI:10.1093/petrology/Special_Volume.1.331]
  44. [22] Fitton J.G., James D., Kempton P.P.D., Ormerod D.S., Leeman W.P., "the role of lithospheric mantle in the generation of late Cenozoic basic magmas in the western united states", Journal of Petrology (1988) 331-349. [DOI:10.1093/petrology/Special_Volume.1.331]
  45. [23] Muller D., Groves D.I., "Potasic igneus rocks and associated gold-copper mineralization", lecture Notes in Earth Sciences 56 (1997) 296P.
  46. [23] Muller D., Groves D.I., "Potasic igneus rocks and associated gold-copper mineralization", lecture Notes in Earth Sciences 56 (1997) 296P.
  47. [24] Wilson M., "Igneous Petrogensis a global tectonic approach, Department of Earth Sciences, University of Leeds", Lodon, Unwin Hyman (1989).
  48. [24] Wilson M., "Igneous Petrogensis a global tectonic approach, Department of Earth Sciences, University of Leeds", Lodon, Unwin Hyman (1989).
  49. [25] Rollinson H.R., "Aterrane interpretation of the Archaean Limpopo belt", Geol. Mag. 130 (1993) 755-765. [DOI:10.1017/S001675680002313X]
  50. [25] Rollinson H.R., "Aterrane interpretation of the Archaean Limpopo belt", Geol. Mag. 130 (1993) 755-765. [DOI:10.1017/S001675680002313X]
  51. [26] Nagudi N.O., Koberal C.H., Kurat G., "petrography and geochemical of the Singo granite Uganda and implications for its origin", Journal of African earth Science 35 (2003) 55-59.
  52. [26] Nagudi N.O., Koberal C.H., Kurat G., "petrography and geochemical of the Singo granite Uganda and implications for its origin", Journal of African earth Science 35 (2003) 55-59.
  53. [27] Pearce J.A., Harris N.B.W., Tindle A.G., "Trace element discrimination diagrams for the tectonic interpretation of granitic rocks", Journal of Petrology 25 (1984) 956-983. [DOI:10.1093/petrology/25.4.956]
  54. [27] Pearce J.A., Harris N.B.W., Tindle A.G., "Trace element discrimination diagrams for the tectonic interpretation of granitic rocks", Journal of Petrology 25 (1984) 956-983. [DOI:10.1093/petrology/25.4.956]
مجله بلورشناسی و کانی شناسی ایران
دوره 26، شماره 1 - شماره پیاپی 69
فروردین 1397
صفحه 125-136

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سابقه مقاله

  • تاریخ دریافت: 14 اسفند 1395
  • تاریخ بازنگری: 08 خرداد 1396
  • تاریخ پذیرش: 10 تیر 1396

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