Loading…

Syn‐Shearing Deformation Mechanisms of Minerals in Partially Molten Metapelites

We investigated an experimentally sheared (γ = 15, γ˙ = 3 × 10−4 s−1, 300 MPa, 750°C) quartz‐muscovite aggregate to understand the deformation of parent and new crystals in partially molten rocks. The scanning electron microscope and electron backscatter diffraction analyses along the longitudinal a...

Full description

Saved in:
Bibliographic Details
Published in:Geophysical research letters 2021-11, Vol.48 (22), p.n/a
Main Authors: Dutta, Dripta, Misra, Santanu, Mainprice, David
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by
cites cdi_FETCH-LOGICAL-a3595-d6369f53d7e8632f97db720e95236446fcc3de645f0c9bc0c3ed583da3c38ce23
container_end_page n/a
container_issue 22
container_start_page
container_title Geophysical research letters
container_volume 48
creator Dutta, Dripta
Misra, Santanu
Mainprice, David
description We investigated an experimentally sheared (γ = 15, γ˙ = 3 × 10−4 s−1, 300 MPa, 750°C) quartz‐muscovite aggregate to understand the deformation of parent and new crystals in partially molten rocks. The scanning electron microscope and electron backscatter diffraction analyses along the longitudinal axial section of the cylindrical sample suggest that quartz and muscovite melted partially and later produced K‐feldspar, ilmenite, biotite, mullite, and cordierite. Quartz grains became finer, and muscovite was almost entirely consumed in the process. With increasing γ, melt and crystal fractions decreased and increased, respectively. Among the new minerals, K‐feldspar grains (highest area fraction and coarsest) nucleated first, whereas cordierite and mullite grains, finest and least in number, respectively, nucleated last. Fine grain size, weak crystallographic preferred orientations, low intragranular deformation, and equant shapes suggest both initial and new minerals deformed dominantly by melt‐assisted grain boundary sliding, which is further substantiated by higher misorientations between adjacent grains of quartz, K‐feldspar, and ilmenite. Plain Language Summary The processes governing the deformation of minerals in partially molten rocks are poorly understood as we generally only see the end product. To focus light on this, we sheared quartz and muscovite aggregate to a large shear strain at high pressure and temperature, where these two minerals underwent partial melting and produced new minerals. Electron backscatter diffraction based microstructural investigations of an experimentally sheared partial melt reveal that even at elevated pressure and temperatures, and significant magnitude of deformation, the presence of melt, together with strain partitioning and low intergranular stress transfer, inhibited intragranular plastic deformation in the remaining starting materials and the newly grown crystals. Key Points In an HPT torsion experiment (γ = 15), quartz‐muscovite melted partially and produced K‐feldspar, ilmenite, biotite, mullite, and cordierite Quartz grain size reduced, muscovite was consumed entirely, K‐feldspar grains nucleated first while mullite/cordierite nucleated last Melt‐assisted grain boundary sliding was the dominant deformation mechanism for the reactants and “in‐situ” melt‐crystallized phases
doi_str_mv 10.1029/2021GL094667
format article
fullrecord <record><control><sourceid>proquest_hal_p</sourceid><recordid>TN_cdi_hal_primary_oai_HAL_insu_03661281v1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2601449904</sourcerecordid><originalsourceid>FETCH-LOGICAL-a3595-d6369f53d7e8632f97db720e95236446fcc3de645f0c9bc0c3ed583da3c38ce23</originalsourceid><addsrcrecordid>eNp90MtKw0AUBuBBFKzVnQ8QcCdGz1wyySyLl1ZI8VJdD9PJjJ2SJnUmVbLzEXxGn8SUiLhydeDw8XPOj9AxhnMMRFwQIHicg2CcpztogAVjcQaQ7qIBdNs4IynfRwchLAGAAsUD9DBrq6-Pz9nCKO-ql-jK2NqvVOPqKpoavVCVC6sQ1Taausp4VYbIVdG98o1TZdlG07pszJY2am1K15hwiPZsx8zRzxyi55vrp8tJnN-Nby9HeaxoIpK44JQLm9AiNRmnxIq0mKcEjEgI5YxxqzUtDGeJBS3mGjQ1RZLRQlFNM20IHaLTPnehSrn2bqV8K2vl5GSUS1eFjQTKOSYZfsMdPunx2tevGxMauaw3vuruk4QDZkwIYJ0665X2dQje2N9cDHLbsPzbcMdJz99dadp_rRw_5t2XIqHf8oN8XQ</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2601449904</pqid></control><display><type>article</type><title>Syn‐Shearing Deformation Mechanisms of Minerals in Partially Molten Metapelites</title><source>Wiley-Blackwell AGU Digital Library</source><creator>Dutta, Dripta ; Misra, Santanu ; Mainprice, David</creator><creatorcontrib>Dutta, Dripta ; Misra, Santanu ; Mainprice, David</creatorcontrib><description>We investigated an experimentally sheared (γ = 15, γ˙ = 3 × 10−4 s−1, 300 MPa, 750°C) quartz‐muscovite aggregate to understand the deformation of parent and new crystals in partially molten rocks. The scanning electron microscope and electron backscatter diffraction analyses along the longitudinal axial section of the cylindrical sample suggest that quartz and muscovite melted partially and later produced K‐feldspar, ilmenite, biotite, mullite, and cordierite. Quartz grains became finer, and muscovite was almost entirely consumed in the process. With increasing γ, melt and crystal fractions decreased and increased, respectively. Among the new minerals, K‐feldspar grains (highest area fraction and coarsest) nucleated first, whereas cordierite and mullite grains, finest and least in number, respectively, nucleated last. Fine grain size, weak crystallographic preferred orientations, low intragranular deformation, and equant shapes suggest both initial and new minerals deformed dominantly by melt‐assisted grain boundary sliding, which is further substantiated by higher misorientations between adjacent grains of quartz, K‐feldspar, and ilmenite. Plain Language Summary The processes governing the deformation of minerals in partially molten rocks are poorly understood as we generally only see the end product. To focus light on this, we sheared quartz and muscovite aggregate to a large shear strain at high pressure and temperature, where these two minerals underwent partial melting and produced new minerals. Electron backscatter diffraction based microstructural investigations of an experimentally sheared partial melt reveal that even at elevated pressure and temperatures, and significant magnitude of deformation, the presence of melt, together with strain partitioning and low intergranular stress transfer, inhibited intragranular plastic deformation in the remaining starting materials and the newly grown crystals. Key Points In an HPT torsion experiment (γ = 15), quartz‐muscovite melted partially and produced K‐feldspar, ilmenite, biotite, mullite, and cordierite Quartz grain size reduced, muscovite was consumed entirely, K‐feldspar grains nucleated first while mullite/cordierite nucleated last Melt‐assisted grain boundary sliding was the dominant deformation mechanism for the reactants and “in‐situ” melt‐crystallized phases</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2021GL094667</identifier><language>eng</language><publisher>Washington: John Wiley &amp; Sons, Inc</publisher><subject>Aggregates ; Backscatter ; Biotite ; Cordierite ; CPO ; Crystal growth ; Crystallography ; Crystals ; Deformation ; Deformation mechanisms ; Diffraction ; Earth Sciences ; EBSD ; Electron backscatter diffraction ; Feldspars ; Grain boundary sliding ; Grain size ; High pressure ; Ilmenite ; metapelite ; Mica ; Minerals ; misorientation analysis ; Mullite ; Muscovite ; partial melt ; Plastic deformation ; Quartz ; Rock ; Rocks ; Scanning electron microscopy ; Sciences of the Universe ; Shear strain ; Shearing ; Strain ; Stress transfer ; torsion experiment</subject><ispartof>Geophysical research letters, 2021-11, Vol.48 (22), p.n/a</ispartof><rights>2021. American Geophysical Union. All Rights Reserved.</rights><rights>Copyright</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-a3595-d6369f53d7e8632f97db720e95236446fcc3de645f0c9bc0c3ed583da3c38ce23</cites><orcidid>0000-0001-9247-6388 ; 0000-0002-2364-1965</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2021GL094667$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2021GL094667$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,11514,27924,27925,46468,46892</link.rule.ids><backlink>$$Uhttps://insu.hal.science/insu-03661281$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Dutta, Dripta</creatorcontrib><creatorcontrib>Misra, Santanu</creatorcontrib><creatorcontrib>Mainprice, David</creatorcontrib><title>Syn‐Shearing Deformation Mechanisms of Minerals in Partially Molten Metapelites</title><title>Geophysical research letters</title><description>We investigated an experimentally sheared (γ = 15, γ˙ = 3 × 10−4 s−1, 300 MPa, 750°C) quartz‐muscovite aggregate to understand the deformation of parent and new crystals in partially molten rocks. The scanning electron microscope and electron backscatter diffraction analyses along the longitudinal axial section of the cylindrical sample suggest that quartz and muscovite melted partially and later produced K‐feldspar, ilmenite, biotite, mullite, and cordierite. Quartz grains became finer, and muscovite was almost entirely consumed in the process. With increasing γ, melt and crystal fractions decreased and increased, respectively. Among the new minerals, K‐feldspar grains (highest area fraction and coarsest) nucleated first, whereas cordierite and mullite grains, finest and least in number, respectively, nucleated last. Fine grain size, weak crystallographic preferred orientations, low intragranular deformation, and equant shapes suggest both initial and new minerals deformed dominantly by melt‐assisted grain boundary sliding, which is further substantiated by higher misorientations between adjacent grains of quartz, K‐feldspar, and ilmenite. Plain Language Summary The processes governing the deformation of minerals in partially molten rocks are poorly understood as we generally only see the end product. To focus light on this, we sheared quartz and muscovite aggregate to a large shear strain at high pressure and temperature, where these two minerals underwent partial melting and produced new minerals. Electron backscatter diffraction based microstructural investigations of an experimentally sheared partial melt reveal that even at elevated pressure and temperatures, and significant magnitude of deformation, the presence of melt, together with strain partitioning and low intergranular stress transfer, inhibited intragranular plastic deformation in the remaining starting materials and the newly grown crystals. Key Points In an HPT torsion experiment (γ = 15), quartz‐muscovite melted partially and produced K‐feldspar, ilmenite, biotite, mullite, and cordierite Quartz grain size reduced, muscovite was consumed entirely, K‐feldspar grains nucleated first while mullite/cordierite nucleated last Melt‐assisted grain boundary sliding was the dominant deformation mechanism for the reactants and “in‐situ” melt‐crystallized phases</description><subject>Aggregates</subject><subject>Backscatter</subject><subject>Biotite</subject><subject>Cordierite</subject><subject>CPO</subject><subject>Crystal growth</subject><subject>Crystallography</subject><subject>Crystals</subject><subject>Deformation</subject><subject>Deformation mechanisms</subject><subject>Diffraction</subject><subject>Earth Sciences</subject><subject>EBSD</subject><subject>Electron backscatter diffraction</subject><subject>Feldspars</subject><subject>Grain boundary sliding</subject><subject>Grain size</subject><subject>High pressure</subject><subject>Ilmenite</subject><subject>metapelite</subject><subject>Mica</subject><subject>Minerals</subject><subject>misorientation analysis</subject><subject>Mullite</subject><subject>Muscovite</subject><subject>partial melt</subject><subject>Plastic deformation</subject><subject>Quartz</subject><subject>Rock</subject><subject>Rocks</subject><subject>Scanning electron microscopy</subject><subject>Sciences of the Universe</subject><subject>Shear strain</subject><subject>Shearing</subject><subject>Strain</subject><subject>Stress transfer</subject><subject>torsion experiment</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp90MtKw0AUBuBBFKzVnQ8QcCdGz1wyySyLl1ZI8VJdD9PJjJ2SJnUmVbLzEXxGn8SUiLhydeDw8XPOj9AxhnMMRFwQIHicg2CcpztogAVjcQaQ7qIBdNs4IynfRwchLAGAAsUD9DBrq6-Pz9nCKO-ql-jK2NqvVOPqKpoavVCVC6sQ1Taausp4VYbIVdG98o1TZdlG07pszJY2am1K15hwiPZsx8zRzxyi55vrp8tJnN-Nby9HeaxoIpK44JQLm9AiNRmnxIq0mKcEjEgI5YxxqzUtDGeJBS3mGjQ1RZLRQlFNM20IHaLTPnehSrn2bqV8K2vl5GSUS1eFjQTKOSYZfsMdPunx2tevGxMauaw3vuruk4QDZkwIYJ0665X2dQje2N9cDHLbsPzbcMdJz99dadp_rRw_5t2XIqHf8oN8XQ</recordid><startdate>20211128</startdate><enddate>20211128</enddate><creator>Dutta, Dripta</creator><creator>Misra, Santanu</creator><creator>Mainprice, David</creator><general>John Wiley &amp; Sons, Inc</general><general>American Geophysical Union</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0001-9247-6388</orcidid><orcidid>https://orcid.org/0000-0002-2364-1965</orcidid></search><sort><creationdate>20211128</creationdate><title>Syn‐Shearing Deformation Mechanisms of Minerals in Partially Molten Metapelites</title><author>Dutta, Dripta ; Misra, Santanu ; Mainprice, David</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a3595-d6369f53d7e8632f97db720e95236446fcc3de645f0c9bc0c3ed583da3c38ce23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Aggregates</topic><topic>Backscatter</topic><topic>Biotite</topic><topic>Cordierite</topic><topic>CPO</topic><topic>Crystal growth</topic><topic>Crystallography</topic><topic>Crystals</topic><topic>Deformation</topic><topic>Deformation mechanisms</topic><topic>Diffraction</topic><topic>Earth Sciences</topic><topic>EBSD</topic><topic>Electron backscatter diffraction</topic><topic>Feldspars</topic><topic>Grain boundary sliding</topic><topic>Grain size</topic><topic>High pressure</topic><topic>Ilmenite</topic><topic>metapelite</topic><topic>Mica</topic><topic>Minerals</topic><topic>misorientation analysis</topic><topic>Mullite</topic><topic>Muscovite</topic><topic>partial melt</topic><topic>Plastic deformation</topic><topic>Quartz</topic><topic>Rock</topic><topic>Rocks</topic><topic>Scanning electron microscopy</topic><topic>Sciences of the Universe</topic><topic>Shear strain</topic><topic>Shearing</topic><topic>Strain</topic><topic>Stress transfer</topic><topic>torsion experiment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dutta, Dripta</creatorcontrib><creatorcontrib>Misra, Santanu</creatorcontrib><creatorcontrib>Mainprice, David</creatorcontrib><collection>CrossRef</collection><collection>Meteorological &amp; Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>Meteorological &amp; Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dutta, Dripta</au><au>Misra, Santanu</au><au>Mainprice, David</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Syn‐Shearing Deformation Mechanisms of Minerals in Partially Molten Metapelites</atitle><jtitle>Geophysical research letters</jtitle><date>2021-11-28</date><risdate>2021</risdate><volume>48</volume><issue>22</issue><epage>n/a</epage><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>We investigated an experimentally sheared (γ = 15, γ˙ = 3 × 10−4 s−1, 300 MPa, 750°C) quartz‐muscovite aggregate to understand the deformation of parent and new crystals in partially molten rocks. The scanning electron microscope and electron backscatter diffraction analyses along the longitudinal axial section of the cylindrical sample suggest that quartz and muscovite melted partially and later produced K‐feldspar, ilmenite, biotite, mullite, and cordierite. Quartz grains became finer, and muscovite was almost entirely consumed in the process. With increasing γ, melt and crystal fractions decreased and increased, respectively. Among the new minerals, K‐feldspar grains (highest area fraction and coarsest) nucleated first, whereas cordierite and mullite grains, finest and least in number, respectively, nucleated last. Fine grain size, weak crystallographic preferred orientations, low intragranular deformation, and equant shapes suggest both initial and new minerals deformed dominantly by melt‐assisted grain boundary sliding, which is further substantiated by higher misorientations between adjacent grains of quartz, K‐feldspar, and ilmenite. Plain Language Summary The processes governing the deformation of minerals in partially molten rocks are poorly understood as we generally only see the end product. To focus light on this, we sheared quartz and muscovite aggregate to a large shear strain at high pressure and temperature, where these two minerals underwent partial melting and produced new minerals. Electron backscatter diffraction based microstructural investigations of an experimentally sheared partial melt reveal that even at elevated pressure and temperatures, and significant magnitude of deformation, the presence of melt, together with strain partitioning and low intergranular stress transfer, inhibited intragranular plastic deformation in the remaining starting materials and the newly grown crystals. Key Points In an HPT torsion experiment (γ = 15), quartz‐muscovite melted partially and produced K‐feldspar, ilmenite, biotite, mullite, and cordierite Quartz grain size reduced, muscovite was consumed entirely, K‐feldspar grains nucleated first while mullite/cordierite nucleated last Melt‐assisted grain boundary sliding was the dominant deformation mechanism for the reactants and “in‐situ” melt‐crystallized phases</abstract><cop>Washington</cop><pub>John Wiley &amp; Sons, Inc</pub><doi>10.1029/2021GL094667</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0001-9247-6388</orcidid><orcidid>https://orcid.org/0000-0002-2364-1965</orcidid><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 0094-8276
ispartof Geophysical research letters, 2021-11, Vol.48 (22), p.n/a
issn 0094-8276
1944-8007
language eng
recordid cdi_hal_primary_oai_HAL_insu_03661281v1
source Wiley-Blackwell AGU Digital Library
subjects Aggregates
Backscatter
Biotite
Cordierite
CPO
Crystal growth
Crystallography
Crystals
Deformation
Deformation mechanisms
Diffraction
Earth Sciences
EBSD
Electron backscatter diffraction
Feldspars
Grain boundary sliding
Grain size
High pressure
Ilmenite
metapelite
Mica
Minerals
misorientation analysis
Mullite
Muscovite
partial melt
Plastic deformation
Quartz
Rock
Rocks
Scanning electron microscopy
Sciences of the Universe
Shear strain
Shearing
Strain
Stress transfer
torsion experiment
title Syn‐Shearing Deformation Mechanisms of Minerals in Partially Molten Metapelites
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-04T21%3A36%3A27IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_hal_p&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Syn%E2%80%90Shearing%20Deformation%20Mechanisms%20of%20Minerals%20in%20Partially%20Molten%20Metapelites&rft.jtitle=Geophysical%20research%20letters&rft.au=Dutta,%20Dripta&rft.date=2021-11-28&rft.volume=48&rft.issue=22&rft.epage=n/a&rft.issn=0094-8276&rft.eissn=1944-8007&rft_id=info:doi/10.1029/2021GL094667&rft_dat=%3Cproquest_hal_p%3E2601449904%3C/proquest_hal_p%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-a3595-d6369f53d7e8632f97db720e95236446fcc3de645f0c9bc0c3ed583da3c38ce23%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=2601449904&rft_id=info:pmid/&rfr_iscdi=true