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The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece()

We describe the structure, microstructures, texture and paleopiezometry of quartz-rich phyllites and marbles along N-trending Moutsounas shear zone at the eastern margin of the Naxos metamorphic core complex (MCC). Fabrics consistently indicate a top-to-the-NNE non-coaxial shear and formed during th...

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Autores principales: Cao, Shuyun, Neubauer, Franz, Bernroider, Manfred, Liu, Junlai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier Limited 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4599598/
https://www.ncbi.nlm.nih.gov/pubmed/26523079
http://dx.doi.org/10.1016/j.jsg.2013.07.002
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author Cao, Shuyun
Neubauer, Franz
Bernroider, Manfred
Liu, Junlai
author_facet Cao, Shuyun
Neubauer, Franz
Bernroider, Manfred
Liu, Junlai
author_sort Cao, Shuyun
collection PubMed
description We describe the structure, microstructures, texture and paleopiezometry of quartz-rich phyllites and marbles along N-trending Moutsounas shear zone at the eastern margin of the Naxos metamorphic core complex (MCC). Fabrics consistently indicate a top-to-the-NNE non-coaxial shear and formed during the main stage of updoming and exhumation between ca. 14 and 11 Ma of the Naxos MCC. The main stage of exhumation postdates the deposition of overlying Miocene sedimentary successions and predates the overlying Upper Miocene/Pliocene conglomerates. Detailed microstructural and textural analysis reveals that the movement along the Moutsounas shear zone is associated with a retrograde greenschist to subgreenschist facies overprint of the early higher-temperature rocks. Paleopiezometry on recrystallized quartz and calcite yields differential stresses of 20–77 MPa and a strain rate of 10(−15)–10(−13) s(−1) at 350 °C for quartz and ca. 300 °C for calcite. Chlorite geothermometry of the shear zone yields two temperature regimes, 300–360 °C, and 200–250 °C. The lower temperature group is interpreted to result from late-stage hydrothermal overprint.
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spelling pubmed-45995982015-10-29 The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece() Cao, Shuyun Neubauer, Franz Bernroider, Manfred Liu, Junlai J Struct Geol Article We describe the structure, microstructures, texture and paleopiezometry of quartz-rich phyllites and marbles along N-trending Moutsounas shear zone at the eastern margin of the Naxos metamorphic core complex (MCC). Fabrics consistently indicate a top-to-the-NNE non-coaxial shear and formed during the main stage of updoming and exhumation between ca. 14 and 11 Ma of the Naxos MCC. The main stage of exhumation postdates the deposition of overlying Miocene sedimentary successions and predates the overlying Upper Miocene/Pliocene conglomerates. Detailed microstructural and textural analysis reveals that the movement along the Moutsounas shear zone is associated with a retrograde greenschist to subgreenschist facies overprint of the early higher-temperature rocks. Paleopiezometry on recrystallized quartz and calcite yields differential stresses of 20–77 MPa and a strain rate of 10(−15)–10(−13) s(−1) at 350 °C for quartz and ca. 300 °C for calcite. Chlorite geothermometry of the shear zone yields two temperature regimes, 300–360 °C, and 200–250 °C. The lower temperature group is interpreted to result from late-stage hydrothermal overprint. Elsevier Limited 2013-09 /pmc/articles/PMC4599598/ /pubmed/26523079 http://dx.doi.org/10.1016/j.jsg.2013.07.002 Text en © 2013 Elsevier Ltd. https://creativecommons.org/licenses/by-nc-sa/3.0/This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License (https://creativecommons.org/licenses/by-nc-sa/3.0/) .
spellingShingle Article
Cao, Shuyun
Neubauer, Franz
Bernroider, Manfred
Liu, Junlai
The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece()
title The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece()
title_full The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece()
title_fullStr The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece()
title_full_unstemmed The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece()
title_short The lateral boundary of a metamorphic core complex: The Moutsounas shear zone on Naxos, Cyclades, Greece()
title_sort lateral boundary of a metamorphic core complex: the moutsounas shear zone on naxos, cyclades, greece()
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4599598/
https://www.ncbi.nlm.nih.gov/pubmed/26523079
http://dx.doi.org/10.1016/j.jsg.2013.07.002
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