Skip to main content
SpringerLink
Log in

Petrology of eclogites from north of Shahrekord, Sanandaj-Sirjan Zone, Iran

  • Published:
Mineralogy and Petrology Aims and scope Submit manuscript

Summary

Metabasic rocks were recently found within a ductile shear zone in the north of Shahrekord, being a part of the structural zone of Sanandaj-Sirjan, SW Iran. The rocks give evidence of a so far unrecognized eclogite facies metamorphic event and testify to high pressure metamorphism in the Sanandaj-Sirjan Zone, near the Main Zagros Reverse Fault, which is the assumed suture zone between the Arabian plate and the Iranian block. The eclogites occur as lenses or blocks within ortho- and paragneisses. The petrographic features and reaction textures display at least two main metamorphic stages: (1) a peak eclogite facies stage, and (2) a subsequent amphibolite facies stage. The eclogite facies metamorphism is indicated by omphacite + garnet + sodic-calcic amphiboles (barroisite, magnesiokatophorite and magnesiotaramite) + phengite + rutile + (clino-)zoisite + quartz ± dolomite. The garnets are mainly almandine-rich, which fits with the C-type eclogite classification. Calcic amphiboles (hornblende, tschermakite and pargasite) + plagioclase are secondary phases formed during the retrograde amphibolite-facies metamorphism. P-T estimates for the eclogite facies give pressures of 21–24 kbar and temperatures of 590–630 °C (geothermometry) and 470–520 °C (THERMOCALC), respectively. Geothermobarometry for the amphibolite-facies metamorphism yields 10–11 kbar and 650–700 °C.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • P Agard J Omrani L Jolivet F Mouthereau (2005) ArticleTitleConvergence history across Zagros (Iran): constraints from collisional and earlier deformation Int J Earth Sci 94 401–419 Occurrence Handle10.1007/s00531-005-0481-4

    Article  Google Scholar 

  • Y Ai (1994) ArticleTitleA revision of the garnet-clinopyroxene Fe2+-Mg exchange geothermometer Contrib Mineral Petrol 115 467–473 Occurrence Handle10.1007/BF00320979

    Article  Google Scholar 

  • M Alavi (1994) ArticleTitleTectonics of the Zagros orogenic belt of Iran: new data and interpretations Tectonophysics 229 211–238 Occurrence Handle10.1016/0040-1951(94)90030-2

    Article  Google Scholar 

  • JL Anderson DR Smith (1995) ArticleTitleThe effects of temperature and oxygen fugacity on the Al-in-hornblende barometer Am Mineral 80 549–559

    Google Scholar 

  • JP Bellot C Triboulet C Laverne G Bronner (2003) ArticleTitleEvidence for two burial/exhumation stages during the evolution of the Variscan belt, as exemplified by P-T-t-d paths of metabasites in distinct allochthonous units of the Maures massif (SE France) Int J Earth Sci 92 7–26

    Google Scholar 

  • M Berberian GC King (1981) ArticleTitleTowards a paleogeography and tectonics evolution of Iran Can J Earth Sci 18 210–265

    Google Scholar 

  • RG Berman LY Aranovich DRM Pattison (1995) ArticleTitleReassessment of the garnet-clinopyroxene Fe-Mg exchange thermometer: II. Thermodynamic analysis Contrib Mineral Petrol 119 30–42 Occurrence Handle10.1007/BF00310715

    Article  Google Scholar 

  • DA Carswell (1990) Eclogite facies rocks Blackie Glasgow and London

    Google Scholar 

  • RG Coleman DE Lee LB Beatty WW Brannock (1965) ArticleTitleEclogites and eclogites: their differences and similarities Geol Soc Am Bull 76 483–508 Occurrence Handle10.1130/0016-7606(1965)76[483:EAETDA]2.0.CO;2

    Article  Google Scholar 

  • E Dachs (1998) ArticleTitlePET: Petrological elementary tools for mathematica Comput Geosci 24 219–235 Occurrence Handle10.1016/S0098-3004(97)00141-6

    Article  Google Scholar 

  • E Dachs (2004) ArticleTitlePET: Petrological elementary tools for mathematica: an update Comput Geosci 30 173–182 Occurrence Handle10.1016/j.cageo.2003.09.007

    Article  Google Scholar 

  • J Dale TJB Holland R Powell (2000) ArticleTitleHornblende-garnet-plagioclase-thermobarometry: a natural assemblage calibration of the thermodynamics of hornblende Contrib Mineral Petrol 40 353–362 Occurrence Handle10.1007/s004100000187

    Article  Google Scholar 

  • Davoudian AR (2005) The tectonometamorphic and magmatic evolution in the Shahrekord-Daran area (Sanandaj – Sirjan Zone, Iran), PhD Thesis, University of Isfahan, Iran, pp 220

  • AR Davoudian M Khalili I Noorbehsht E Dachs J Genser N Shabanian (2006) ArticleTitleGeochemistry of metabasites in the north of the Shahrekord, Sanandaj – Sirjan Zone, Iran N Jb Mineral Abh 182 291–298 Occurrence Handle10.1127/0077-7757/2006/0052

    Article  Google Scholar 

  • WA Deer RA Howie J Zussman (1992) An introdution to the rock-forming minerals Longman Scientific & Technical Harlow, England

    Google Scholar 

  • JF Dewey WC Pitman WBF Ryan J Bonnin (1973) ArticleTitlePlate tectonics and the evolution of the Alpine System Geol Soc Am Bull 84 3137–3180 Occurrence Handle10.1130/0016-7606(1973)84<3137:PTATEO>2.0.CO;2

    Article  Google Scholar 

  • GTR Droop (1987) ArticleTitleA general equation for estimating Fe+3 concentrations in ferromagnesian silicates and oxides from microprobe analyses, using stoichiometric criteria Mineral Mag 51 431–435 Occurrence Handle10.1180/minmag.1987.051.361.10

    Article  Google Scholar 

  • DJ Ellis DH Green (1979) ArticleTitleAn experimental study of the effect of Ca upon garnet-clinopyroxene Fe-Mg exchange equilibria Contrib Mineral Petrol 76 413–419

    Google Scholar 

  • WG Ernst J Liu (1998) ArticleTitleExperimental phase-equilibrium study of Al- and Ti-contents of calcic amphibole in MORB – A semiquantitative thermobarometer Am Mineral 83 952–969

    Google Scholar 

  • J Ganguly W Cheng M Tirone (1996) ArticleTitleThermodynamics of aluminosilicate garnet solid solution: new experimental data, an optimized model, and thermometric applications Contrib Mineral Petro1 126 137–151 Occurrence Handle10.1007/s004100050240

    Article  Google Scholar 

  • A Ghasemi CJ Talbot (2006) ArticleTitleA new tectonic scenario for the Sanandaj-Sirjan Zone (Iran) J Asian Earth Sci 26 683–693 Occurrence Handle10.1016/j.jseaes.2005.01.003

    Article  Google Scholar 

  • ED Ghent (1988) A review of chemical zoning in eclogite garnets DC Smith (Eds) Eclogite and eclogite-facies rocks Elsevier Amsterdam 217–231

    Google Scholar 

  • CM Graham R Powell (1984) ArticleTitleA garnet-hornblende geothermometer: calibration, testing and application to the Pelona Schist, southern California J Metamorph Geol 2 13–21 Occurrence Handle10.1111/j.1525-1314.1984.tb00282.x

    Article  Google Scholar 

  • DH Green AE Ringwood (1967) ArticleTitleAn experimental investigation of the gabbro to eclogite transformation and its petrological applications Geochim Cosmochim Acta 31 767–833 Occurrence Handle10.1016/S0016-7037(67)80031-0

    Article  Google Scholar 

  • TH Green PL Hellman (1982) ArticleTitleFe-Mg partitioning between coexisting garnet and phengite at high pressure, and comments on a garnet-phengite geothermometer Lithos 15 253–266 Occurrence Handle10.1016/0024-4937(82)90017-2

    Article  Google Scholar 

  • JR Haynes H McQuillan (1974) ArticleTitleEvolution of the Zagros Suture Zone, Southern Iran Geol Soc Am Bull 85 739–744 Occurrence Handle10.1130/0016-7606(1974)85<739:EOTZSZ>2.0.CO;2

    Article  Google Scholar 

  • T Holland J Blundy (1994) ArticleTitleNon-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry Contrib Mineral Petro1 16 433–447 Occurrence Handle10.1007/BF00310910

    Article  Google Scholar 

  • TJB Holland (1980) ArticleTitleThe reaction albite = jadeite + quartz determined experimentally in the range 600–1200 8C Am Mineral 65 129–134

    Google Scholar 

  • TJB Holland (1990) ArticleTitleActivities of components in omphacitic solid solutions. An application of Landau theory to mixtures Contrib Mineral Petro1 105 446–453 Occurrence Handle10.1007/BF00286831

    Article  Google Scholar 

  • TJB Holland R Powell (1998) ArticleTitleAn internally consistent thermodynamic data set for phases of petrological interest J Metamorph Geol 16 309–343 Occurrence Handle10.1111/j.1525-1314.1998.00140.x

    Article  Google Scholar 

  • G Hoschek (2007) ArticleTitleMetamorphic peak conditions of eclogites in the Tauern Window, Eastern Alps, Austria: thermobarometry of the assemblage garnet + omphacite + phengite + kyanite + quartz Lithos 93 1–16 Occurrence Handle10.1016/j.lithos.2006.03.042

    Article  Google Scholar 

  • R Kretz (1983) ArticleTitleSymbols for rock-forming minerals Am Mineral 68 277–279

    Google Scholar 

  • EJ Krogh (1980) ArticleTitleGeochemistry and petrology of glaucophane-bearing eclogites and associated rocks from Sunnfjord, western Norway Lithos 13 355–380 Occurrence Handle10.1016/0024-4937(80)90054-7

    Article  Google Scholar 

  • EJ Krogh A Raheim (1978) ArticleTitleTemperature and pressure dependence of Fe-Mg partitioning between garnet and phengite with particular reference to eclogites Contrib Mineral Petrol 66 75–80 Occurrence Handle10.1007/BF00376087

    Article  Google Scholar 

  • E Krogh Ravna MP Terry (2004) ArticleTitleGeothermobarometry of UHP and HP eclogites and schists – an evaluation of equilibria among garnet-clinopyroxene-kyanite-phengite-coesite/quartz J Metamorph Geol 22 579–592 Occurrence Handle10.1111/j.1525-1314.2004.00534.x

    Article  Google Scholar 

  • RE Krogh Ravna (2000) ArticleTitleThe garnet-clinopyroxene Fe2+-Mg geothermometer: an updated calibration J Metamorph Geol 18 211–219 Occurrence Handle10.1046/j.1525-1314.2000.00247.x

    Article  Google Scholar 

  • BE Leake InstitutionalAuthorNamethe IMA Commission (1997) ArticleTitleNomenclature of amphiboles. Report of the Subcommittee on Amphiboles of the International Mineralogical Association on New Minerals and Mineral Names Eur J Mineral 9 623–651

    Google Scholar 

  • M Macquarie (2004) ArticleTitleCrustal scale geometry of the Zagros fold-thrust belt, Iran J Struct Geol 26 519–535 Occurrence Handle10.1016/j.jsg.2003.08.009

    Article  Google Scholar 

  • N McQuarrie JM Stock C Verdel BP Wernicke (2003) ArticleTitleCenozoic evolution of Neotethys and implications for the causes of plate motions Geophys Res Lett 30 1–4 Occurrence Handle10.1029/2003GL017992

    Article  Google Scholar 

  • M Mohajjel CL Fergusson (2000) ArticleTitleDextral transpression in late Cretaceous continental collision, Sanandaj-Sirjan Zone, Western Iran J Struct Geol 22 1125–1139 Occurrence Handle10.1016/S0191-8141(00)00023-7

    Article  Google Scholar 

  • M Mohajjel CL Fergusson MR Sahandi (2003) ArticleTitleCretaceous-Tertiary convergence and continental collision, Sanandaj-Sirjan Zone, western Iran J Asian Earth Sci 21 397–412 Occurrence Handle10.1016/S1367-9120(02)00035-4

    Article  Google Scholar 

  • N Morimoto J Fabries AK Ferguson IV Ginzburg M Ross FA Seifert J Zussman K Aoki G Gottardi (1988) ArticleTitleNomenclature of pyroxenes Mineral Mag 52 535–550 Occurrence Handle10.1180/minmag.1988.052.367.15

    Article  Google Scholar 

  • BO Mysen WL Griffin (1973) ArticleTitlePyroxene stoichiometry and the breakdown of omphacite Am Mineral 58 60–63

    Google Scholar 

  • SM Peacock (1995) ArticleTitleUltrahigh-pressure metamorphic rocks and the thermal evolution of continent collision belts Island Arc 4 376–383 Occurrence Handle10.1111/j.1440-1738.1995.tb00157.x

    Article  Google Scholar 

  • R Powell (1985) ArticleTitleRegression diagnostic and robust regression in geothermometer/geobarometer calibration: the garnet-clinopyroxene geothermometer revisited J Metamorph Geol 3 327–342 Occurrence Handle10.1111/j.1525-1314.1985.tb00324.x

    Article  Google Scholar 

  • R Powell TJB Holland (1988) ArticleTitleAn internally consistent thermodynamic dataset with uncertainties and correlations: 3. Application, methods, worked examples and a computer program J Metamorph Geol 6 173–204 Occurrence Handle10.1111/j.1525-1314.1988.tb00415.x

    Article  Google Scholar 

  • N Rashidnejad-Omran MH Emami M Sabzehei E Rastad H Bellon A Pique (2002) ArticleTitleLithostratigraphie et histoire paléozoïque à paléocène des complexes métamorphiques de la région de Muteh, zone de Sanandaj-Sirjan (Iran méridional) C. R. Geoscience 334 1185–1191 Occurrence Handle10.1016/S1631-0713(02)01861-8

    Article  Google Scholar 

  • FB Roland RJ Tracy (1991) ArticleTitleP-T paths from zoned garnets: some minimum criteria Am J Sci 291 917–939 Occurrence Handle10.2475/ajs.291.10.917

    Article  Google Scholar 

  • Sabzehei M (1996) An introduction to general geological features of metamorphic complexes in southern Sanandaj-Sirjan zone. Geol. Surv. Iran (Unpublished, in Persian)

  • R Sassi C Mazzoli C Miller J Konzett (2004) ArticleTitleGeochemistry and metamorphic evolution of the Pohorje Mountain eclogites from the easternmost Austroalpine basement of the Eastern Alps (Northern Slovenia) Lithos 78 235–261 Occurrence Handle10.1016/j.lithos.2004.05.002

    Article  Google Scholar 

  • Sengör AMC (1984) The cimmeride orogenic system and the tectonics of Eurasia, Geological Society of America Special Paper, 195

  • AMC Sengör BA Natal’in (1996) Paleotectonics of Asia: fragments of a synthesis A Yin TM Harrison (Eds) The tectonic evolution of Asia Cambridge University Press Cambridge 486–640

    Google Scholar 

  • FS Spear (1991) ArticleTitleOn the interpretation of peak metamorphic temperatures in light of garnet diffusion during cooling J Metamorph Geol 9 379–388 Occurrence Handle10.1111/j.1525-1314.1991.tb00533.x

    Article  Google Scholar 

  • M Sepehr JW Cosgrove (2004) ArticleTitleStructural framework of the Zagros Fold-Thrust Belt, Iran Mar Petrol Geol 21 829–843 Occurrence Handle10.1016/j.marpetgeo.2003.07.006

    Article  Google Scholar 

  • J Stöcklin (1968) ArticleTitleStructural history and tectonics of Iran: a review Am Assoc Petroleum Geol Bull 52 1229–1258

    Google Scholar 

  • T Tsujimori K Matsumoto J Wakabayashi JG Liou (2006) ArticleTitleFranciscan eclogite revisited: reevaluation of the P-T evolution of tectonic blocks from Tiburon Peninsula, California, U.S.A Mineral Petrol 88 243–267 Occurrence Handle10.1007/s00710-006-0157-1

    Article  Google Scholar 

  • DJ Waters HN Martin (1993) ArticleTitleGeobarometry of phengite-bearing eclogites Terra Abstracts 5 410–411

    Google Scholar 

  • TM Will E Schmädicke (2001) ArticleTitleA first find of retrogressed eclogites in the Odenwald crystalline Complex, Mid-German Crystalline Rise, Germany: evidence for a so far unrecognized high-pressure metamorphism in the Central Variscides Lithos 59 109–125 Occurrence Handle10.1016/S0024-4937(01)00059-7

    Article  Google Scholar 

  • T Zack A Kronz SF Foley T Rivers (2002) ArticleTitleTrace element abundances in rutiles from eclogites and associated garnet mica schists Chem Geol 184 97–122 Occurrence Handle10.1016/S0009-2541(01)00357-6

    Article  Google Scholar 

  • Zahedi M, Rahmati-Ilkhchi M, Vaezipour J (1992) Geological map of the Shahrekord Quadrangle E8. 1:250000, Geological Survey of Iran, Tehran, Iran

Download references

Author information

Authors and Affiliations

  1. Department of Natural Resources, Shahrekord University, Shahrekord, Iran

    A. R. Davoudian

  2. Department of Geography and Geology, Salzburg University, Salzburg, Austria

    J. Genser

  3. Department of Material Science and Physics, Salzburg University, Salzburg, Austria

    E. Dachs

  4. Payame Noor University, Iran

    N. Shabanian

Authors
  1. A. R. Davoudian
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. Genser
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. E. Dachs
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. N. Shabanian
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Author’s address: Ali Reza Davoudian, Department of Natural Resources, Shahrekord University, Shahrekord, Iran

Rights and permissions

Reprints and permissions

About this article

Cite this article

Davoudian, A., Genser, J., Dachs, E. et al. Petrology of eclogites from north of Shahrekord, Sanandaj-Sirjan Zone, Iran. Miner Petrol 92, 393–413 (2008). https://doi.org/10.1007/s00710-007-0204-6

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00710-007-0204-6

Keywords

Search

Navigation