{"id":3894,"date":"2023-01-01T14:25:35","date_gmt":"2023-01-01T14:25:35","guid":{"rendered":"http:\/\/caribbeanlithos.ub.edu\/?p=3894"},"modified":"2026-03-04T14:35:40","modified_gmt":"2026-03-04T14:35:40","slug":"2023-fluid-flow-in-the-subduction-channel-tremolite-veins-and-associated-blackwalls-in-antigoritite-villa-clara-serpentinite-melange-cuba","status":"publish","type":"post","link":"https:\/\/caribbeanlithos.ub.edu\/?p=3894","title":{"rendered":"2023: Fluid flow in the subduction channel: Tremolite veins and associated blackwalls in antigoritite (Villa Clara serpentinite m\u00e9lange, Cuba)"},"content":{"rendered":"\n<p><strong>Fluid flow in the subduction channel: Tremolite veins and associated blackwalls in antigoritite (Villa Clara serpentinite m\u00e9lange, Cuba)<\/strong><\/p>\n\n\n\n<p><span style=\"text-decoration: underline;\">Abstract<\/span><\/p>\n\n\n\n<p>Exotic blocks of massive antigorite-serpentinite (antigoritite) document a deep-seated subduction channel in the Villa Clara serpentinite-matrix m\u00e9lange, central Cuba. The petrological and geochemical characteristics of antigoritite allow distinguishing two types of rock: i) antigoritite and ii) dolomite-bearing antigoritite. Both types are intimately related in field exposures and represent deep peridotite infiltrated by H2O-CO2 fluid mixtures that triggered antigoritization and local carbonation. Fluid infiltration continued after antigoritization forming a vein network as a potential response to hydrofracturing that precipitated tremolitite in the veins and triggered fluid-antigoritite reaction forming blackwalls. The mineralogical and chemical zoning in the blackwalls (Atg + Chl + Tr adjacent to antigoritite and Chl + Tr adjacent to the tremolitite vein) attest for multi-step metasomatic processes during fluid-rock interaction characterized by advection of infiltrating fluid towards the blackwall and, possibly, by diffusion out of the blackwall towards the fluid-filled vein. Tentative thermodynamic modeling of the blackwall domain Atg + Chl + Tr points vein network formation at 400\u2013500 \u00b0C and 5\u201310 kbar during exhumation in the subduction channel, suggesting the infiltration of deep-seated pressurized fluid that triggered hydrofracturing. The chemical compositions of antigoritites, veins and blackwalls indicate a LILE- and LREE-enriched fluid evolved from the subducting plate, while Srsingle bondNd isotope systematics are compatible with an external fluid composed of a mixture of fluids evolved from sediments and, probably to a lesser extent, altered oceanic crust.<\/p>\n\n\n\n<p><strong>Keywords:<\/strong> Antigoritite; Abyssal peridotite; Subduction; Fluid infiltration; Metasomatism; M\u00e9lange; Cuba; Caribbean<\/p>\n\n\n\n<p>----------------------------------------------------------------------------------------------------------<\/p>\n\n\n\n<p><strong>To Cite this article:<\/strong> Butjosa, L., Cambeses, A., Proenza, J. A., Blanco-Quintero, I. F., Agostini, S., Iturralde-Vinent, M. A., &amp; Garcia-Casco, A. (2023). Fluid flow in the subduction channel: Tremolite veins and associated blackwalls in antigoritite (Villa Clara serpentinite m\u00e9lange, Cuba). Lithos, 436, 106973.<\/p>\n\n\n\n<p><strong>DOI: <\/strong><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0024493722003826?via%3Dihub\">10.1016\/j.lithos.2022.106973<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Fluid flow in the subduction channel: Tremolite veins and associated blackwalls in antigoritite (Villa Clara serpentinite m\u00e9lange, Cuba) Abstract Exotic blocks of massive antigorite-serpentinite (antigoritite) document a deep-seated subduction channel in the Villa Clara serpentinite-matrix m\u00e9lange, central Cuba. The petrological and geochemical characteristics of antigoritite allow distinguishing two types of rock: i) antigoritite and ii) dolomite-bearing antigoritite. Both types are&nbsp;<a href=\"https:\/\/caribbeanlithos.ub.edu\/?p=3894\" class=\"read-more\">Continue Reading<\/a>","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[135,40,44],"tags":[],"class_list":["post-3894","post","type-post","status-publish","format-standard","hentry","category-135","category-cuba","category-publications","cat-135-id","cat-40-id","cat-44-id"],"_links":{"self":[{"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=\/wp\/v2\/posts\/3894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3894"}],"version-history":[{"count":1,"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=\/wp\/v2\/posts\/3894\/revisions"}],"predecessor-version":[{"id":3895,"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=\/wp\/v2\/posts\/3894\/revisions\/3895"}],"wp:attachment":[{"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3894"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/caribbeanlithos.ub.edu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}