Petrology and mineral chemistry in the Calc-silicates of the Deh-salm metamorphic complex, East of Lut block: evidence of progressive metamorphism to the granulite facies

Document Type : Original Article

Authors

Department of Geology, Faculty of Science , University of Sistan & Baluchestan

Abstract

The Deh-Salm Metamorphic Complex (DMC) is composed of metapelite, metabasite, metaperidotite, and calc-silicate rocks and is one of the few outcrops of the Lut block’s basement which emerged near to the Sistan suture zone. In the eastern part of the Deh-Salm metamorphic complex, the calc-silicate and marble appeared in the form of elongated tectonic lenses that have been metamorphosed in similar temperature and pressure conditions of the confined rocks. Evidences from mineralogical and petrographic studies indicate the existence of different mineral assemblages in the calc-silicates but with similar metamorphism conditions. Scapolite + alkali feldspar + plagioclase + sphene, scapolite + pyroxene, garnet + amphibole + epidote and garnet + pyroxene + Wollastonite are most important paragenesis recognized. The results provided by this study, based on the EPMA method, classify the scapolite into the calcic group that can be called mizzonite (Me% 70 – 80), alkali feldspar with a composition close to orthoclase, and plagioclase as an andesine composition. Garnet in the studied rocks are rich grassular end-member. Pyroxene of the calc-silicate rocks are the clinopyroxene with the diopside composition. Based on the metamorphic paragenesis, geochemical analyses, and comparsion of the metamorphic grade between the calc-silicate and the adjacent metabasites, a progressive metamorphism up to the upper amphibolite-granulite facies from the west to the east of the complex has taken place. It may be considered that the Late Jurassic regional metamorphism event was synchronous with the Shah Kuh granitization at the eastern margin of the Lut Block due to the subduction of the Neotethys ocean.

References

  1. [1] Winkler H.G. F., "Petrogenesis of metamorphic rocks", 3rd Ed. Springer, Berlin, (1974), 1-334. [DOI:10.1007/978-1-4612-9828-1_1]
  2. [1] Winkler H.G. F., "Petrogenesis of metamorphic rocks", 3rd Ed. Springer, Berlin, (1974), 1-334. [DOI:10.1007/978-1-4612-9828-1_1]
  3. [2] Bucher K., Frey M., "Petrogenesis of Metamorphic Rocks", Berlin, Heidelberg, New York, Springer-Verlag, (1994) 334. [DOI:10.1007/978-3-662-03000-4]
  4. [2] Bucher K., Frey M., "Petrogenesis of Metamorphic Rocks", Berlin, Heidelberg, New York, Springer-Verlag, (1994) 334. [DOI:10.1007/978-3-662-03000-4]
  5. [3] Bucher K., Graps R., "Petrogenesis of Metamorphic Rocks", Springer-Verlag Berlin Heidelberg, (2011) 428. [DOI:10.1007/978-3-540-74169-5]
  6. [3] Bucher K., Graps R., "Petrogenesis of Metamorphic Rocks", Springer-Verlag Berlin Heidelberg, (2011) 428. [DOI:10.1007/978-3-540-74169-5]
  7. [4] Hewitt D. A., "The metamorphism of micaceous limestones from south-central Connecticut", Am J Sci 273A, (1973) 444 - 469.
  8. [4] Hewitt D. A., "The metamorphism of micaceous limestones from south-central Connecticut", Am J Sci 273A, (1973) 444 - 469.
  9. [5] Ferry J. M., "Metamorphism of calcareous sediments in the Waterville-Vassalboro area", southcentral Maine: mineral reactions and graphical analysis, Am J Sci 276, (1976) 841-882. [DOI:10.2475/ajs.276.7.841]
  10. [5] Ferry J. M., "Metamorphism of calcareous sediments in the Waterville-Vassalboro area", southcentral Maine: mineral reactions and graphical analysis, Am J Sci 276, (1976) 841-882. [DOI:10.2475/ajs.276.7.841]
  11. [6] Frey J. M., "Progressive low-grade metamorphism of a black shale formation", Central Swiss Alps, with special reference to pyrophyllite and margarite bearing assemblages, JPetrol19, (1978) 93 - 135. [DOI:10.1093/petrology/19.1.95]
  12. [6] Frey J. M., "Progressive low-grade metamorphism of a black shale formation", Central Swiss Alps, with special reference to pyrophyllite and margarite bearing assemblages, JPetrol19, (1978) 93 - 135. [DOI:10.1093/petrology/19.1.95]
  13. [7] Frank E., "Alpine metamorphism of calcareous rocks along a cross-section in the Central Alps: occurrence and breakdown of muscovite, margarite and paragonite", Schweiz Miner Petrogr Mitt 63, (1983) 37 - 93.
  14. [7] Frank E., "Alpine metamorphism of calcareous rocks along a cross-section in the Central Alps: occurrence and breakdown of muscovite, margarite and paragonite", Schweiz Miner Petrogr Mitt 63, (1983) 37 - 93.
  15. [8] Satish-Kumar M., Santosh M., Yoshida M., "Reaction textures in calc-silicates as guides to the pressure-temperature fluid history of granulite facies terrains in east Gondwana", Journal of Geosciences, Osuka city university, v. 38, Art 5, (1995) 89 - 114.
  16. [8] Satish-Kumar M., Santosh M., Yoshida M., "Reaction textures in calc-silicates as guides to the pressure-temperature fluid history of granulite facies terrains in east Gondwana", Journal of Geosciences, Osuka city university, v. 38, Art 5, (1995) 89 - 114.
  17. [9] Sahandi M., "Dehsalm Geological Map 1:250000", Geological Survey of Iran, Tehran (1992).
  18. [9] Sahandi M., "Dehsalm Geological Map 1:250000", Geological Survey of Iran, Tehran (1992).
  19. [10] Mahmoodi SH., "Petrology of metamorphic rocks of the Dehsalm complex" (in Persian). MSc thesis, University of Tehran, Tehran, Iran (2004).
  20. [10] Mahmoodi SH., "Petrology of metamorphic rocks of the Dehsalm complex" (in Persian). MSc thesis, University of Tehran, Tehran, Iran (2004).
  21. [11] Arefnejad M., "Deformation study of Dehsalm metamorphic complex, west of Chahdashi." (in Persian). Msc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2010).
  22. [11] Arefnejad M., "Deformation study of Dehsalm metamorphic complex, west of Chahdashi." (in Persian). Msc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2010).
  23. [12] Mokhtari N., "Geochemistry of Granitoid rocks from East of Lut Block: Constraints on the nature of the crust in Eastern Iran," (in Persian).MSc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2012).
  24. [12] Mokhtari N., "Geochemistry of Granitoid rocks from East of Lut Block: Constraints on the nature of the crust in Eastern Iran," (in Persian).MSc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2012).
  25. [13] Bahramnejad E., "Metamorphic study of the Dehsalm complex, with a special notice to geochemistry of Garnet-Staurolite-bering rocks, east of Lut Block," (in Persian). MSc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2015).
  26. [13] Bahramnejad E., "Metamorphic study of the Dehsalm complex, with a special notice to geochemistry of Garnet-Staurolite-bering rocks, east of Lut Block," (in Persian). MSc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2015).
  27. [14] Naseri A., "Petrology of mafic and ultramafic rocks of the Dehsalm metamorphic complex," (in Persian). east of Lut Block. MSc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2015).
  28. [14] Naseri A., "Petrology of mafic and ultramafic rocks of the Dehsalm metamorphic complex," (in Persian). east of Lut Block. MSc thesis, University of Sistan and Baluchestan, Zahedan, Iran (2015).
  29. [15] Bagheri S., Biabangard H., Naseri A., Zahedi A., Kuzuo N., "Using amphibole geochemistry in tectono-metamorphic evolution of the Deh-Salm metamorphic complex," (in Persian). Iranian Journal of Crystallography and Mineralogy, 24 (3) :605-618 (2016).
  30. [15] Bagheri S., Biabangard H., Naseri A., Zahedi A., Kuzuo N., "Using amphibole geochemistry in tectono-metamorphic evolution of the Deh-Salm metamorphic complex," (in Persian). Iranian Journal of Crystallography and Mineralogy, 24 (3) :605-618 (2016).
  31. [16] Bahramnejad E., Bagheri S., Ahmadi A., Zahedi A., "Progressive metamorphism in metapelites of the Deh-Salm Metamorphic Complex, east of the Lut Block, according to thermometry of Garnet-Biotite," (in Persian). Scientific Quarterly Journal, GEOSCIENCES, V. 26, NO. 102 (2017).
  32. [16] Bahramnejad E., Bagheri S., Ahmadi A., Zahedi A., "Progressive metamorphism in metapelites of the Deh-Salm Metamorphic Complex, east of the Lut Block, according to thermometry of Garnet-Biotite," (in Persian). Scientific Quarterly Journal, GEOSCIENCES, V. 26, NO. 102 (2017).
  33. [17] Mahmoudi SH., Masoudi F., Corfu F., Mehrabi B., "Magmatic and metamorphic history of the Deh-salm metamorphic Complex, Eastern Lut Block, (Eastern Iran)", from U-Pb geochronology. In: Journal Earth Science (Geol Rundsch) V. 99, (2009) 1153 - 1165. [DOI:10.1007/s00531-009-0465-x]
  34. [17] Mahmoudi SH., Masoudi F., Corfu F., Mehrabi B., "Magmatic and metamorphic history of the Deh-salm metamorphic Complex, Eastern Lut Block, (Eastern Iran)", from U-Pb geochronology. In: Journal Earth Science (Geol Rundsch) V. 99, (2009) 1153 - 1165. [DOI:10.1007/s00531-009-0465-x]
  35. [18] Naderi mighan N. and Akrami M.A. "Explanatory text of Chah-Dashi. Geological Quadrangle Map 1:100000," Geological Survey of Iran, Tehran (2005).
  36. [18] Naderi mighan N. and Akrami M.A. "Explanatory text of Chah-Dashi. Geological Quadrangle Map 1:100000," Geological Survey of Iran, Tehran (2005).
  37. [19] Akrami M.A. and Naderi mighan N. " Dehsalm Geological Map 1:100000," Geological Survey of Iran, Tehran (2005).
  38. [19] Akrami M.A. and Naderi mighan N. " Dehsalm Geological Map 1:100000," Geological Survey of Iran, Tehran (2005).
  39. [20] Hamzehpour B. Chahar-farsakh Geological Map 1:100000," Geological Survey of Iran, Tehran (2003).
  40. [20] Hamzehpour B. Chahar-farsakh Geological Map 1:100000," Geological Survey of Iran, Tehran (2003).
  41. [21] Stöcklin J., Eftekhar-Nezhad J., Hushmand-zadeh A.,"Central Lut reconnaissance, East Iran", Geological Survy Iran, Vol. 22, (1972) 62 - 70.
  42. [21] Stöcklin J., Eftekhar-Nezhad J., Hushmand-zadeh A.,"Central Lut reconnaissance, East Iran", Geological Survy Iran, Vol. 22, (1972) 62 - 70.
  43. [22] Berberian M., "Structural history of Lut Zone.Geological Survey of Iran",Tehran Internal Report,Vol, 34 (1973).
  44. [22] Berberian M., "Structural history of Lut Zone.Geological Survey of Iran",Tehran Internal Report,Vol, 34 (1973).
  45. [23] Davoudzadeh M., Soffel H., Schmidt J., "On the rotation of centeral- East Iran microplate", N.jb. Geol. Palaont. Mh 3, (1981) 108 - 192. [DOI:10.1127/njgpm/1981/1981/180]
  46. [23] Davoudzadeh M., Soffel H., Schmidt J., "On the rotation of centeral- East Iran microplate", N.jb. Geol. Palaont. Mh 3, (1981) 108 - 192. [DOI:10.1127/njgpm/1981/1981/180]
  47. [24] Reyer D., Mohaffez A., "A first contribution of the NIOC-ERAP agreements to the knowledge of Iranian geology", Edition Techniqs Paris, (1972) 50 - 58.
  48. [24] Reyer D., Mohaffez A., "A first contribution of the NIOC-ERAP agreements to the knowledge of Iranian geology", Edition Techniqs Paris, (1972) 50 - 58.
  49. [25] Crawford A. R., "A summary of isotropic age data for Iran, Pakistan and India", Memories hors serie de la sociate geologique de France, 8, (1977) 251 - 260.
  50. [25] Crawford A. R., "A summary of isotropic age data for Iran, Pakistan and India", Memories hors serie de la sociate geologique de France, 8, (1977) 251 - 260.
  51. [26] Esmaeily D., Nedelec A., Valizadeh M.V., Moore F., Cotton J., "Petrology of Jorassic Shah-Kuh granite (eastern Iran), with reference to tin mineralization", J Asian Earth Sci 25, (2005) 961 - 980. [DOI:10.1016/j.jseaes.2004.09.003]
  52. [26] Esmaeily D., Nedelec A., Valizadeh M.V., Moore F., Cotton J., "Petrology of Jorassic Shah-Kuh granite (eastern Iran), with reference to tin mineralization", J Asian Earth Sci 25, (2005) 961 - 980. [DOI:10.1016/j.jseaes.2004.09.003]
  53. [27] Spear F. S., "Metamorphic phase equilibria and pressure-temprature-time paths", Mineralogical society of America, monograph Series. BookCrafters, Inc., Chelsea, Michigan, U.S.A, (1993) 799
  54. [27] Spear F. S., "Metamorphic phase equilibria and pressure-temprature-time paths", Mineralogical society of America, monograph Series. BookCrafters, Inc., Chelsea, Michigan, U.S.A, (1993) 799
  55. [28] Sokolva E, Hawthovne F. C., "The crystal chemistry of the Scapolite- Group minerals. Crystal structure and Long- Range order", The Canadian mineralogist, vol. 46, (2008) 1527 - 1559. [DOI:10.3749/canmin.46.6.1527]
  56. [28] Sokolva E, Hawthovne F. C., "The crystal chemistry of the Scapolite- Group minerals. Crystal structure and Long- Range order", The Canadian mineralogist, vol. 46, (2008) 1527 - 1559. [DOI:10.3749/canmin.46.6.1527]
  57. [29] Shaw M., "The geochemistryo f scapolite", Part I, Previousw ork and geneqaml ineralogyJ. Petrol.1, (1960) 218 - 261. [DOI:10.1093/petrology/1.1.218]
  58. [29] Shaw M., "The geochemistryo f scapolite", Part I, Previousw ork and geneqaml ineralogyJ. Petrol.1, (1960) 218 - 261. [DOI:10.1093/petrology/1.1.218]
  59. [30] Teertstra D. K., Sherriff B. L., "Substitutional mechanisms, compositional trends and the end-member formulae of scapolite", Chem. Geol, v. 136, (1997) 233 - 260. [DOI:10.1016/S0009-2541(96)00146-5]
  60. [30] Teertstra D. K., Sherriff B. L., "Substitutional mechanisms, compositional trends and the end-member formulae of scapolite", Chem. Geol, v. 136, (1997) 233 - 260. [DOI:10.1016/S0009-2541(96)00146-5]
  61. [31] Evans B.W., Shaw D. R., Haughton D. M., "Scapolite stoichiometry Contrib", Mineral. Petrol , 24, (1969) 293 - 305. [DOI:10.1007/BF00371272]
  62. [31] Evans B.W., Shaw D. R., Haughton D. M., "Scapolite stoichiometry Contrib", Mineral. Petrol , 24, (1969) 293 - 305. [DOI:10.1007/BF00371272]
  63. [32] Harley S. L., Buick, I. S., "Wollastonite-scapolite assemblages as indicators of granulite pressure-temperature-fluid histories", the Rauer Group, East Antarctica, J Petrol 33 (1992) 693 - 728. [DOI:10.1093/petrology/33.3.693]
  64. [32] Harley S. L., Buick, I. S., "Wollastonite-scapolite assemblages as indicators of granulite pressure-temperature-fluid histories", the Rauer Group, East Antarctica, J Petrol 33 (1992) 693 - 728. [DOI:10.1093/petrology/33.3.693]
  65. [33] Teertstra D. K., Sherriff B. L., "Scapolite cellparameter trends along the solid-solution series", Am. Mineral, v. 81, (1996) 169 - 180. [DOI:10.2138/am-1996-1-221]
  66. [33] Teertstra D. K., Sherriff B. L., "Scapolite cellparameter trends along the solid-solution series", Am. Mineral, v. 81, (1996) 169 - 180. [DOI:10.2138/am-1996-1-221]
  67. [34] Hassan I., Buseck. P. R., "HRTEM Characterization of scapolite solid-solutions", Am. Mineral., v. 73, (1988) 119-134.
  68. [34] Hassan I., Buseck. P. R., "HRTEM Characterization of scapolite solid-solutions", Am. Mineral., v. 73, (1988) 119-134.
  69. [35] Baker J., Newton R. C., "Experimental determined activity- composition relations for Ca-rich scapolite in the system CaAl2SiO8-NaAlSi3O8-CaCO3 at 7 kbar", Am. Mineral.,v. 80, (1995) 744 - 751. [DOI:10.2138/am-1995-7-811]
  70. [35] Baker J., Newton R. C., "Experimental determined activity- composition relations for Ca-rich scapolite in the system CaAl2SiO8-NaAlSi3O8-CaCO3 at 7 kbar", Am. Mineral.,v. 80, (1995) 744 - 751. [DOI:10.2138/am-1995-7-811]
  71. [36] Brocker M., Fotoohi Rad Gh., Abbaslu F., Rodionov N., "Geochronology of high-grade metamorphic rocks from the Anjul area, Lut block, eastern Iran", Journal of Asian Earth Sciences. (2014) 82, PP: 151-162. [DOI:10.1016/j.jseaes.2013.12.021]
  72. [36] Brocker M., Fotoohi Rad Gh., Abbaslu F., Rodionov N., "Geochronology of high-grade metamorphic rocks from the Anjul area, Lut block, eastern Iran", Journal of Asian Earth Sciences. (2014) 82, PP: 151-162. [DOI:10.1016/j.jseaes.2013.12.021]

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  • Receive Date: 29 April 2020
  • Revise Date: 21 April 2020
  • Accept Date: 07 July 2020

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