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Doklady Earth Sciences

, Volume 461, Issue 1, pp 291–296 | Cite as

UHPM eclogite of the Maksyutov complex (Southern Urals)

  • P. M. ValizerEmail author
  • A. A. Krasnobaev
  • A. I. Rusin
Geochemistry

Abstract

This study reports the first find of a jadeite-bearing eclogite spatially associated with UHP ultramafic rocks of unit 1 of the Maksyutov complex (near the village of Karayanovo). Two phases of elcogitization were recognized based on mineralogical data, petrographic observations, and isotope geochronology. The first UHP metamorphic stage (533 ± 4.6 Ma, P > 4.4 GPa, T > 700°C) was defined by the assemblage jadeite + grossular-almandine + rutile ± phengite. This assemblage was later transformed into omphacite + grossular-almandine + phengite + albite + clinozoisite + titanite at a retrograde phase of stage I (392–485 ± 2–4 Ma, P > 3.1–3.4 GPa, T > 633–740°C) with decreasing pressure and temperature. The second prograde phase (360 ± 3 Ma, P > 1.1–2.2 GPa, T > 450–550°C) of HP metamorphism was marked by the development of a chlorite rim (almandine-grossular—pyrope-almandine-grossular, diopside, clinozoisite) around the eclogite body. A comparison shows that the studied eclogite and ultramafic rocks followed a common P-T-t path. Jadiet-bearing eclogites and meta-ultramafic rocks represent UHPM fragments of the mantle and crust, which were tectonically emplaced in quartzite schists of unit 1.

Keywords

DOKLADY Earth Science Diopside Titanite Ultramafic Rock Antigorite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  • P. M. Valizer
    • 1
    Email author
  • A. A. Krasnobaev
    • 2
  • A. I. Rusin
    • 2
  1. 1.Ilmen State Reserve, Ural BranchRussian Academy of SciencesMiassRussia
  2. 2.Zavaritskii Institute of Geology and Geochemistry, Ural BranchRussian Academy of SciencesYekaterinburgRussia

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