Conditions of Metamorphism of Rocks of the Kichan Structure in the Archean Tiksheozero Greenstone Belt (Belomorian Region, Fennoscandinavian Shield)

封面

如何引用文章

全文:

开放存取 开放存取
受限制的访问 ##reader.subscriptionAccessGranted##
受限制的访问 订阅或者付费存取

详细

Metamorphic rocks of the Kichan structure of the Tiksheozero greenstone belt were formed after differentiated volcanic series and represented by gneisses, schists, and amphibolites. Conditions of metamorphism correspond to the high-pressure part of the epidote-amphibolite and amphibolite facies. The Gibbs energy minimization method has shown that mineral assemblages of metabasites (plagioclase + biotite + hornblende + garnet) occupy low- and medium-temperature regions in the P–T diagram (550–720 °C, 3–10 kbar). Metamorphic conditions for assemblages of kyanite-garnet-biotite and garnet + two-mica gneisses correspond to temperature 600–730 °C and pressure 6–8 kbar, which is consistent with petrographic observations. When using multiple mineral equilibria, the best intersections of reaction lines correspond to 640–650 °C, 7.8–8.0 kbar with decreasing to 620–630 °C, 6.2–6.5 kbar if Ti-containing phases and H2O are taken into account. For metabasic mineral assemblages, the calculated water activity is close to 0.6, while for gneisses it reaches 0.9–1.0. According to predecessors, mineral assemblages and texture of the studied rocks were formed during the Proterozoic (1.80–1.76 Ga) stage of metamorphism of Archean volcanics synchronous with the late stages of the formation of the Svecofennian and Lapland-Kola orogens. Supracrustal series of volcanics were presumably formed in marginal-oceanic settings in the transition zone between the Karelian Craton and the Belomorian mobile belt.

作者简介

A. Usoltseva

Saint Petersburg State University, Institute of Earth Sciences

Email: st097637@student.spbu.ru
Saint Petersburg, Russia

T. Myskova

Institute of Precambrian Geology and Geochronology RAS

Saint Petersburg, Russia

S. Baltybaev

Saint Petersburg State University, Institute of Earth Sciences; Institute of Precambrian Geology and Geochronology RAS

Saint Petersburg, Russia

O. Galankina

Institute of Precambrian Geology and Geochronology RAS

Saint Petersburg, Russia

参考

  1. Balaganskiy V. V., Gorbunov I. A., Mudruk S. V. Paleoproterozoic Lapland-Kola and Svecofennian orogens (Baltic Shield). Bull. Kola Science Centre RAS. 2016. N 3. P. 5—11 (in Russian).
  2. Baltybaev Sh. K. Svecofennian orogen of the Fennoscandian shield: Compositional and isotopic zoning and its tectonic interpretation. Geotectonics. 2013. Vol. 47. P. 452—464.
  3. Bayanova T. B. Age of reference geological complexes of the Kola region and duration of magmatic processes. Saint Petersburg: Nauka, 2004. 174 p. (in Russian).
  4. Belyaev O. A., Pozhilenko V. I. Structural and metamorphic evolution of the Belomorian mobile belt (Yen segment). Belomorian mobile belt: geology, geodynamics, geochronology. Abstr. Int. Conf. Petrozavodsk: Karelian Research Center RAS, 1997. 17 p. (in Russian).
  5. Berman R. G. Thermobarometry using multiequilibrium calculations: a new technique with petrologic applications. Canad. Miner. 1991. Vol. 32. P. 833—855.
  6. Berman R. G., Aranovich L. Ya. Rancourt D. G., Mercier D. G. Reversed phase equilibrium constraints on the stability of Mg-Fe-Al biotite. Amer. Miner. 2007. Vol. 92 (1). P. 139—150.
  7. Berman R. G., Aranovich L. Y. Optimized standard state and solution properties of minerals: I. Model calibration for olivine, orthopyroxene, cordierite, garnet, and ilmenite in the system FeO–MgO–CaO–Al 2O3–TiO2–SiO2. Contrib. Miner. Petrol. 1996. Vol. 126. P. 1—24.
  8. Connolly J. A. Multivariable phase-diagrams — an algorithm based on generalized thermodynamics. Amer. J. Sci. 1990. Vol. 290. P. 666—718.
  9. Dale J., Holland T., Powell P. Hornblende-garnet-plagioclase thermobarometry: a natural assemblage calibration of the thermodynamics of hornblende. Contrib. Miner. Petrol. 2000. Vol. 140. P. 353—362.
  10. Early Precambrian of the Baltic Shield. Ed. by V. A. Glebovitsky. Saint Petersburg: Nauka, 2005. 710 p. (in Russian).
  11. Holdaway M. J. Application of new experimental and garnet Margules data to the garnet-biotite geothermometer. Amer. Miner. 2000. Vol. 85. P. 881—892.
  12. Holdaway M. J. Recalibration of the GASP geobarometer in light of recent garnet and plagioclase activity models and versions of the garnet-biotite geothermometer. Amer. Miner. 2001. Vol. 86. P. 1117—1129.
  13. Holland T., Blundy J. Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry. Contrib. Miner. Petrol. 1994. Vol. 116. P. 433—447.
  14. Holland T. J. B., Powell R. An improved and extended internally consistent thermodynamic dataset for phases of petrological interest, involving a new equation of state for solids. J. Metamorph. Geol. 2011. Vol. 29. P. 333—383.
  15. Kalinin A. A., Astafyev B. Yu., Voinova O. A., Bayanova T. B., Hiller V. V. Geological structure and ore potential of the Kichanskaya structure of the Tiksheozero greenstone belt (Northern Karelia). Lithosphere. 2017. Vol. 17. N 3. P. 102—126 (in Russian).
  16. Kozhevnikov V. N. Archean greenstone belts of the Karelian craton as accretionary orogens. Petrozavodsk, 2000. 223 p. (in Russian).
  17. Locock A. J. An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Computers & Geosciences. 2014. Vol. 62. P. 1—11.
  18. Map of mineral facies of metamorphic rocks of the eastern part of the Baltic Shield. Ed. by V. A. Glebovitsky. Saint Petersburg: VSEGEI, 1991 (in Russian).
  19. Milkevich R. I., Miller Yu. V. Precambrian of Northern Eurasia. 1997. P. 61—62 (in Russian).
  20. Milkevich R. I., Miller Yu. V., Glebovitsky V. A., Bogomolov E. M., Guseva V. F. Tholeiitic and calc-alkaline magmatism in the northern part of the Tiksheozersky greenstone belt: geochemical signs of a subduction setting. Geochemistry. 2003. P. 1262—1274 (in Russian).
  21. Miller Yu. V. Belomorian mobile belt of the Baltic Shield. Regional Geol. Metallogeny. 2006. N 27. P. 5—14 (in Russian).
  22. Miller Yu. V., Lvov A. B., Myskova T. A., Bogomolov E. S., Pushkarev Yu. D. Searches for ancient continental crust in the area of junction of the Karelian Craton and the Belomorian mobile belt: isotope-geochemical approach. Reports RAS. 2003. Vol. 389. P. 345—348 (in Russian).
  23. Molina J. F., Cambeses A., Moreno J. A., Morales I., Montero P., Bea F. A. Reassessment of the amphibole-plagioclase NaSi–CaAl exchange thermometer with applications to igneous and high-grade metamorphic rocks. Amer. Miner. 2021. Vol. 106. P. 782—800.
  24. Molina J. F., Moreno J. A., Castro A., Rodriduez C., Fershtater G. B. Calcic amphibole thermobarometry in metamorphic and igneous rocks: New calibrations based on plagioclase/ amphibole Al–Si partitioning and amphibole/ liquid Mg partitioning. Lithos. 2015. Vol. 232. P. 286—305.
  25. Myskova T. A., Nikonova A. S., Nikonov K. A., Zhitnikova I. A., Lvov P. A. Kichan island arc system of the Archean (new geochemical and isotope-geochronological evidence). Proc. Karelian Sci. Center RAS. 2022. N 5. Ser. Geology of the Precambrian. P. 103—106 (in Russian).
  26. Myskova T. A., Nikonova A. S., Nikonov K. A., Zhitnikova I. A., Lvov P. A. The Kichanskaya structure of the Archean Tiksheozero greenstone belt of the Fennoscandian Shield in light of new geochemical and geochronological data. Geochemistry. 2024. Vol. 69. N 9. P. 81—106 (in Russian).
  27. Perchuk L. L. Derivation of a thermodynamically consistent set of geothermometers and geobarometers for metamorphic and magic rocks. In: Progress in Metamorphic and Magmatic Petrology: A Memorial Volume in Honour of D. S. Korzhinskiy. Cambridge: Cambridge University Press, 1991. P. 93—112.
  28. Safonov O. G., Butvina V. G., Limanov E. V., Kosova S. A. Mineral indicators of reactions involving salt components of fluids in the deep lithosphere. Petrology. 2019. Vol. 27. N 5. P. 525—556.
  29. Slabunov A. I. Geology and geodynamics of Archean mobile belts (on the example of the Belomorian province of the Fennoscandian Shield). Petrozavodsk: Karelian Research Center RAS, 2008. 296 p. (in Russian).
  30. Warr L. N. IMA-CNMNC approved mineral symbols. Miner. Mag. 2021. Vol. 85. P. 291—320.
  31. Wu C. M., Zhang J., Ren L. D. Empirical garnet-biotite-plagioclase-quartz (GBPQ) geobarometry in medium to high-grade metapelites. J. Petrol. 2004. Vol. 45. P. 1907—1921.

补充文件

附件文件
动作
1. JATS XML
下载

版权所有 © Russian Academy of Sciences, 2025