Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza G贸ra (SW Poland), Central Europe

<!DOCTYPE html>     <html class="no-js" lang="en">  <head> <title>Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza G贸ra (SW Poland), Central Europe - ADS</title>  <link rel="apple-touch-icon" sizes="180x180" href="/styles/favicon/apple-touch-icon.png" /> <link rel="icon" type="image/png" sizes="32x32" href="/styles/favicon/favicon-32x32.png" /> <link rel="icon" type="image/png" sizes="16x16" href="/styles/favicon/favicon-16x16.png" /> <link rel="manifest" href="/styles/favicon/site.webmanifest" /> <link rel="mask-icon" href="/styles/favicon/safari-pinned-tab.svg" color="#5bbad5" /> <meta name="apple-mobile-web-app-title" content="ADS" /> <meta name="application-name" content="ADS" /> <meta name="msapplication-TileColor" content="#ffc40d" /> <meta name="theme-color" content="#ffffff" />   <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-NT2453N');</script>  <link rel="stylesheet" href="/styles/css/styles.css"> <meta name="robots" content="noarchive"> <link rel="canonical" href="http://ui.adsabs.harvard.edu/abs/2017Litho.286..302M/abstract"/> <meta name="description" content="Mantle xenoliths in the 20 Ma Wilcza G贸ra basanite (Lower Silesia, NE Bohemian Massif) are mostly harzburgites, some with amphibole which is exceptional in the region. Forsterite content in olivine defines two Groups of peridotites: Group A (Fo<SUB>89.1-91.5</SUB>) and Group B (Fo<SUB>84.2-89.2</SUB>). Hornblende-clinopyroxenite, websterite and one composite xenolith consisting of dunite, olivine-hornblendite and pyroxene-hornblende-peridotite contain olivine with Fo<SUB>77.3-82.5</SUB> and are classified as Group C. Group A xenoliths contain Al-poor orthopyroxene and some contain LREE-enriched clinopyroxene with negative Ti, Zr-Hf and Nb-Ta anomalies. Spinel (Cr# 0.57-0.68) is scarce in Group A, and Cr-rich pargasite occurs in only two xenoliths. Group B xenoliths contain less magnesian orthopyroxene and clinopyroxene. The REE patterns of Group B clinopyroxene are convex downward, less enriched in LREE and have smaller negative Ti, Zr-Hf and Nb-Ta anomalies than those in Group A. The Cr# in Group B spinel is 0.26-0.56, while pargasite is Ti-rich and Cr-poor. Clinopyroxene from Group C is low magnesian, slightly enriched in LREE and has no negative Ti, Zr-Hf and Nb-Ta anomalies. Group C pargasite is rich in Ti and poor in Cr. Equilibration temperatures recorded in all groups vary within the range of 905-970 掳C. <P />Xenoliths from Wilcza G贸ra record a polyphase lithospheric mantle evolution, starting with melting which extracted ca. 30% melt from the protolith and left a harzburgite residuum depleted in Al, lacking clinopyroxene and containing rare Cr-rich spinel. This residuum was later overprinted by chromatographic metasomatism by carbonated hydrous silicate melt related to Cenozoic volcanism. The metasomatic agent was locally hydrous enough to enable amphibole to crystallize. The Group C pyroxenites formed directly from the metasomatic melt or during peridotite-melt reactions at high melt-rock ratio. The melt is inferred to have percolated through the wall-rock peridotite, decreasing its amount and changing composition (and that of the crystallizing clinopyroxene and amphibole) as it differentiated chromatographically from Groups B to A. Enrichment in carbonatite component occurred in the further parts of a chromatographic column. Group B peridotites closest to the source of the metasomatic agent were percolated by an iron-rich melt. The latter, aside from crystallizing clinopyroxene and amphibole, caused Fe-enrichment in the host harzburgite. Such a metasomatic history is typical for the lithospheric mantle located beneath the northern margin of the Bohemian Massif, but Wilcza G贸ra is the only locality, where activity of a hydrous metasomatic agent is recorded. Thus, the lithospheric mantle in this area was affected by mafic silicate metasomatic agents of variable compositions.">  <meta property="og:type" content="article"> <meta property="og:title" content="Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza G贸ra (SW Poland), Central Europe"> <meta property="og:site_name" content="ADS"> <meta property="og:description" content="Mantle xenoliths in the 20 Ma Wilcza G贸ra basanite (Lower Silesia, NE Bohemian Massif) are mostly harzburgites, some with amphibole which is exceptional in the region. Forsterite content in olivine defines two Groups of peridotites: Group A (Fo<SUB>89.1-91.5</SUB>) and Group B (Fo<SUB>84.2-89.2</SUB>). Hornblende-clinopyroxenite, websterite and one composite xenolith consisting of dunite, olivine-hornblendite and pyroxene-hornblende-peridotite contain olivine with Fo<SUB>77.3-82.5</SUB> and are classified as Group C. Group A xenoliths contain Al-poor orthopyroxene and some contain LREE-enriched clinopyroxene with negative Ti, Zr-Hf and Nb-Ta anomalies. Spinel (Cr# 0.57-0.68) is scarce in Group A, and Cr-rich pargasite occurs in only two xenoliths. Group B xenoliths contain less magnesian orthopyroxene and clinopyroxene. The REE patterns of Group B clinopyroxene are convex downward, less enriched in LREE and have smaller negative Ti, Zr-Hf and Nb-Ta anomalies than those in Group A. The Cr# in Group B spinel is 0.26-0.56, while pargasite is Ti-rich and Cr-poor. Clinopyroxene from Group C is low magnesian, slightly enriched in LREE and has no negative Ti, Zr-Hf and Nb-Ta anomalies. Group C pargasite is rich in Ti and poor in Cr. Equilibration temperatures recorded in all groups vary within the range of 905-970 掳C. <P />Xenoliths from Wilcza G贸ra record a polyphase lithospheric mantle evolution, starting with melting which extracted ca. 30% melt from the protolith and left a harzburgite residuum depleted in Al, lacking clinopyroxene and containing rare Cr-rich spinel. This residuum was later overprinted by chromatographic metasomatism by carbonated hydrous silicate melt related to Cenozoic volcanism. The metasomatic agent was locally hydrous enough to enable amphibole to crystallize. The Group C pyroxenites formed directly from the metasomatic melt or during peridotite-melt reactions at high melt-rock ratio. The melt is inferred to have percolated through the wall-rock peridotite, decreasing its amount and changing composition (and that of the crystallizing clinopyroxene and amphibole) as it differentiated chromatographically from Groups B to A. Enrichment in carbonatite component occurred in the further parts of a chromatographic column. Group B peridotites closest to the source of the metasomatic agent were percolated by an iron-rich melt. The latter, aside from crystallizing clinopyroxene and amphibole, caused Fe-enrichment in the host harzburgite. Such a metasomatic history is typical for the lithospheric mantle located beneath the northern margin of the Bohemian Massif, but Wilcza G贸ra is the only locality, where activity of a hydrous metasomatic agent is recorded. Thus, the lithospheric mantle in this area was affected by mafic silicate metasomatic agents of variable compositions."> <meta property="og:url" content="https://ui.adsabs.harvard.edu/abs/2017Litho.286..302M/abstract"> <meta property="og:image" content="https://ui.adsabs.harvard.edu/styles/img/transparent_logo.svg"> <meta property="article:published_time" content="08/2017"> <meta property="article:author" content="Matusiak-Ma艂ek, Magdalena"> <meta property="article:author" content="Puziewicz, Jacek"> <meta property="article:author" content="Ntaflos, Theodoros"> <meta property="article:author" content="Gr茅goire, Michel"> <meta property="article:author" content="Kuku艂a, Anna"> <meta property="article:author" content="Wojtulek, Piotr Marian">  <meta name="citation_journal_title" content="Lithos"> <meta name="citation_authors" content="Matusiak-Ma艂ek, Magdalena;Puziewicz, Jacek;Ntaflos, Theodoros;Gr茅goire, Michel;Kuku艂a, Anna;Wojtulek, Piotr Marian"> <meta name="citation_title" content="Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza G贸ra (SW Poland), Central Europe"> <meta name="citation_date" content="08/2017"> <meta name="citation_volume" content="286"> <meta name="citation_firstpage" content="302"> <meta name="citation_doi" content="10.1016/j.lithos.2017.06.017"> <meta name="citation_issn" content="0024-4937"> <meta name="citation_language" content="en"> <meta name="citation_keywords" content="Lithospheric mantle"> <meta name="citation_keywords" content="Xenoliths"> <meta name="citation_keywords" content="Stealth metasomatism"> <meta name="citation_keywords" content="Chromatographic metasomatism"> <meta name="citation_keywords" content="Metasomatism by hydrous carbonated alkaline silicate melt"> <meta name="citation_keywords" content="SW Poland"> <meta name="citation_abstract_html_url" content="https://ui.adsabs.harvard.edu/abs/2017Litho.286..302M/abstract"> <meta name="citation_publication_date" content="08/2017"> <meta name="citation_lastpage" content="323" /> <link title="schema(PRISM)" rel="schema.prism" href="http://prismstandard.org/namespaces/1.2/basic/" /> <meta name="prism.publicationDate" content="08/2017" /> <meta name="prism.publicationName" content="Litho" /> <meta name="prism.issn" content="0024-4937" /> <meta name="prism.volume" content="286" /> <meta name="prism.startingPage" content="302" /> <meta name="prism.endingPage" content="323" /> <link title="schema(DC)" rel="schema.dc" href="http://purl.org/dc/elements/1.1/" /> <meta name="dc.identifier" content="doi:10.1016/j.lithos.2017.06.017" /> <meta name="dc.date" content="08/2017" /> <meta name="dc.source" content="Litho" /> <meta name="dc.title" content="Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza G贸ra (SW Poland), Central Europe" /> <meta name="dc.creator" content="Matusiak-Ma艂ek, Magdalena"> <meta name="dc.creator" content="Puziewicz, Jacek"> <meta name="dc.creator" content="Ntaflos, Theodoros"> <meta name="dc.creator" content="Gr茅goire, Michel"> <meta name="dc.creator" content="Kuku艂a, Anna"> <meta name="dc.creator" content="Wojtulek, Piotr Marian">  <meta name="twitter:card" content="summary_large_image"/> <meta name="twitter:description" content="Mantle xenoliths in the 20 Ma Wilcza G贸ra basanite (Lower Silesia, NE Bohemian Massif) are mostly harzburgites, some with amphibole which is exceptional in the region. Forsterite content in olivine defines two Groups of peridotites: Group A (Fo<SUB>89.1-91.5</SUB>) and Group B (Fo<SUB>84.2-89.2</SUB>). Hornblende-clinopyroxenite, websterite and one composite xenolith consisting of dunite, olivine-hornblendite and pyroxene-hornblende-peridotite contain olivine with Fo<SUB>77.3-82.5</SUB> and are classified as Group C. Group A xenoliths contain Al-poor orthopyroxene and some contain LREE-enriched clinopyroxene with negative Ti, Zr-Hf and Nb-Ta anomalies. Spinel (Cr# 0.57-0.68) is scarce in Group A, and Cr-rich pargasite occurs in only two xenoliths. Group B xenoliths contain less magnesian orthopyroxene and clinopyroxene. The REE patterns of Group B clinopyroxene are convex downward, less enriched in LREE and have smaller negative Ti, Zr-Hf and Nb-Ta anomalies than those in Group A. The Cr# in Group B spinel is 0.26-0.56, while pargasite is Ti-rich and Cr-poor. Clinopyroxene from Group C is low magnesian, slightly enriched in LREE and has no negative Ti, Zr-Hf and Nb-Ta anomalies. Group C pargasite is rich in Ti and poor in Cr. Equilibration temperatures recorded in all groups vary within the range of 905-970 掳C. <P />Xenoliths from Wilcza G贸ra record a polyphase lithospheric mantle evolution, starting with melting which extracted ca. 30% melt from the protolith and left a harzburgite residuum depleted in Al, lacking clinopyroxene and containing rare Cr-rich spinel. This residuum was later overprinted by chromatographic metasomatism by carbonated hydrous silicate melt related to Cenozoic volcanism. The metasomatic agent was locally hydrous enough to enable amphibole to crystallize. The Group C pyroxenites formed directly from the metasomatic melt or during peridotite-melt reactions at high melt-rock ratio. The melt is inferred to have percolated through the wall-rock peridotite, decreasing its amount and changing composition (and that of the crystallizing clinopyroxene and amphibole) as it differentiated chromatographically from Groups B to A. Enrichment in carbonatite component occurred in the further parts of a chromatographic column. Group B peridotites closest to the source of the metasomatic agent were percolated by an iron-rich melt. The latter, aside from crystallizing clinopyroxene and amphibole, caused Fe-enrichment in the host harzburgite. Such a metasomatic history is typical for the lithospheric mantle located beneath the northern margin of the Bohemian Massif, but Wilcza G贸ra is the only locality, where activity of a hydrous metasomatic agent is recorded. Thus, the lithospheric mantle in this area was affected by mafic silicate metasomatic agents of variable compositions."/> <meta name="twitter:title" content="Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza G贸ra (SW Poland), Central Europe"/> <meta name="twitter:site" content="@adsabs"/> <meta name="twitter:domain" content="ADS"/> <meta name="twitter:image:src" content="https://ui.adsabs.harvard.edu/styles/img/transparent_logo.svg"/> <meta name="twitter:creator" content="@adsabs"/> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <base href="/"> <style> .btn-full-ads { color: #fff !important; background-color: #1a1a1a !important; border-color: #1a1a1a !important; margin-top: 9px !important; padding-bottom: 10px !important; padding-top: 10px !important; } .btn-full-ads:hover, .btn-full-ads:focus, .btn-full-ads:active, .btn-full-ads.active, .open>.dropdown-toggle.btn-full-ads { color: #000 !important; 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<li class="author"><a href="/search/?q=author%3A%22Puziewicz%2C+Jacek%22">Puziewicz, Jacek</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Ntaflos%2C+Theodoros%22">Ntaflos, Theodoros</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Gr%C3%A9goire%2C+Michel%22">Gr茅goire, Michel</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Kuku%C5%82a%2C+Anna%22">Kuku艂a, Anna</a> </li>; <li class="author"><a href="/search/?q=author%3A%22Wojtulek%2C+Piotr+Marian%22">Wojtulek, Piotr Marian</a> </li> </ul> </div> <div class="s-abstract-text"> <h4 class="sr-only">Abstract</h4> <p> Mantle xenoliths in the 20 Ma Wilcza G贸ra basanite (Lower Silesia, NE Bohemian Massif) are mostly harzburgites, some with amphibole which is exceptional in the region. Forsterite content in olivine defines two Groups of peridotites: Group A (Fo<SUB>89.1-91.5</SUB>) and Group B (Fo<SUB>84.2-89.2</SUB>). Hornblende-clinopyroxenite, websterite and one composite xenolith consisting of dunite, olivine-hornblendite and pyroxene-hornblende-peridotite contain olivine with Fo<SUB>77.3-82.5</SUB> and are classified as Group C. Group A xenoliths contain Al-poor orthopyroxene and some contain LREE-enriched clinopyroxene with negative Ti, Zr-Hf and Nb-Ta anomalies. Spinel (Cr# 0.57-0.68) is scarce in Group A, and Cr-rich pargasite occurs in only two xenoliths. Group B xenoliths contain less magnesian orthopyroxene and clinopyroxene. The REE patterns of Group B clinopyroxene are convex downward, less enriched in LREE and have smaller negative Ti, Zr-Hf and Nb-Ta anomalies than those in Group A. The Cr# in Group B spinel is 0.26-0.56, while pargasite is Ti-rich and Cr-poor. Clinopyroxene from Group C is low magnesian, slightly enriched in LREE and has no negative Ti, Zr-Hf and Nb-Ta anomalies. Group C pargasite is rich in Ti and poor in Cr. Equilibration temperatures recorded in all groups vary within the range of 905-970 掳C. <P />Xenoliths from Wilcza G贸ra record a polyphase lithospheric mantle evolution, starting with melting which extracted ca. 30% melt from the protolith and left a harzburgite residuum depleted in Al, lacking clinopyroxene and containing rare Cr-rich spinel. This residuum was later overprinted by chromatographic metasomatism by carbonated hydrous silicate melt related to Cenozoic volcanism. The metasomatic agent was locally hydrous enough to enable amphibole to crystallize. The Group C pyroxenites formed directly from the metasomatic melt or during peridotite-melt reactions at high melt-rock ratio. The melt is inferred to have percolated through the wall-rock peridotite, decreasing its amount and changing composition (and that of the crystallizing clinopyroxene and amphibole) as it differentiated chromatographically from Groups B to A. Enrichment in carbonatite component occurred in the further parts of a chromatographic column. Group B peridotites closest to the source of the metasomatic agent were percolated by an iron-rich melt. The latter, aside from crystallizing clinopyroxene and amphibole, caused Fe-enrichment in the host harzburgite. Such a metasomatic history is typical for the lithospheric mantle located beneath the northern margin of the Bohemian Massif, but Wilcza G贸ra is the only locality, where activity of a hydrous metasomatic agent is recorded. Thus, the lithospheric mantle in this area was affected by mafic silicate metasomatic agents of variable compositions. </p> </div> <br> <dl class="s-abstract-dl-horizontal"> <dt>Publication:</dt> <dd> <div id="article-publication">Lithos</div> </dd> <dt>Pub Date:</dt> <dd>August 2017</dd> <dt>DOI:</dt> <dd> <p class="doi-p"> <a href="/link_gateway/2017Litho.286..302M/doi:10.1016/j.lithos.2017.06.017" target="_blank" rel="noreferrer noopener">10.1016/j.lithos.2017.06.017</a> <i class="fa fa-external-link"></i> </p> </dd> <dt>Bibcode:</dt> <dd> <a href="/abs/2017Litho.286..302M/abstract"> 2017Litho.286..302M </a> <i class="icon-help" title="The bibcode is assigned by the ADS as a unique identifier for the paper."></i> </dd> <dt>Keywords:</dt> <dd> <ul class="list-inline"> <li>Lithospheric mantle;</li> <li>Xenoliths;</li> <li>Stealth metasomatism;</li> <li>Chromatographic metasomatism;</li> <li>Metasomatism by hydrous carbonated alkaline silicate melt;</li> <li>SW Poland</li> </ul> </dd> </dl> </article> </div> <div data-widget="ShowCitations"></div> <div data-widget="ShowReferences"></div> <div data-widget="ShowCoreads"></div> <div data-widget="ShowSimilar"></div> <div data-widget="ShowTableofcontents"></div> <div data-widget="ShowGraphics"></div> <div data-widget="ShowExportcitation" data-origin="abstract"></div> <div data-widget="ShowMetrics" data-allow-redirect="false"></div> <div data-widget="MetaTagsWidget"></div> </div> </div> </div> <div class="s-right-col-container col-xs-12 col-sm-12 col-md-3 col-lg-2 s-right-column" id="right-col-container" > <div data-widget="ShowResources"> <div data-reactroot="" class="s-right-col-widget-container" style="padding: 10px" > <div> <div class="resources__container"> <div class="resources__full__list"> <div class="resources__header__row"> <i class="fa fa-file-text-o" aria-hidden="true"> </i> <div class="resources__header__title">full text sources</div> </div> <div class="resources__content"> <div class="resources__content__title"> Publisher </div> <div class="resources__content__links"> <span> <div class="resources__content__link__separator">|</div> </span> <span> <a href="/link_gateway/2017Litho.286..302M/PUB_HTML" rel="noopener" class="resources__content__link " > <i class="fa fa-file-text" aria-hidden="true"> </i> </a> </span> </div> </div> </div> </div> <div data-widget="ShowAssociated"> </div> </div> </div> </div> <div data-widget="ShowGraphicsSidebar"> </div> </div> </div> </div> </div> </div> </div> <div id="footer-container"> <div data-widget="FooterWidget"> <div class="footer s-footer"> <footer> <div class="__footer_wrapper"> <div class="__footer_brand"> 漏 The SAO Astrophysics Data System <div class="__footer_brand_extra"> <p> <i class="fa fa-envelope"></i> adshelp[at]cfa.harvard.edu </p> <p> The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement <em>80NSSC21M0056</em> </p> </div> <div class="__footer_brand_logos"> <div class="logo1"> <a href="http://www.si.edu" target="_blank" rel="noreferrer noopener"> <img id="smithsonian-logo" src="/styles/img/smithsonian-logo.svg" alt="Smithsonian logo" /> </a> </div> <div class="logo2"> <a href="https://www.cfa.harvard.edu/" target="_blank" rel="noreferrer noopener"> <img src="/styles/img/cfa.png" alt="Harvard Center for Astrophysics logo" id="cfa-logo" /> </a> </div> <div class="logo3"> <a href="http://www.nasa.gov" target="_blank" rel="noreferrer noopener"> <img src="/styles/img/nasa-partner.svg" alt="NASA logo" id="nasa-logo" /> </a> </div> </div> <div class="__footer_brand_disclaimer"> *The material contained in this document is based upon work supported by a National Aeronautics and Space Administration (NASA) grant or cooperative agreement. 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Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza G贸ra (SW Poland), Central Europe - ADS