000152189 001__ 152189
000152189 005__ 20250401114419.0
000152189 0247_ $$2doi$$a10.1007/s00126-025-01355-x
000152189 0248_ $$2sideral$$a143420
000152189 037__ $$aART-2025-143420
000152189 041__ $$aeng
000152189 100__ $$aDomínguez-Carretero, D.
000152189 245__ $$aThe gradual shift from forearc basalt-like to boninite-like magmatism during intra-oceanic subduction-initiation recorded by ophiolitic chromite deposits from Cuba
000152189 260__ $$c2025
000152189 5060_ $$aAccess copy available to the general public$$fUnrestricted
000152189 5203_ $$aCuba contains the largest number of ophiolitic chromite deposits throughout the Americas. Most of these deposits are found within the mantle section of the Eastern Cuba and Camagüey ophiolitic massifs, which contain four different chromite mining districts (Camagüey, Mayarí, Sagua de Tánamo, and Moa-Baracoa). In addition to their potential as economic resources, chromite deposits are also excellent petrogenetic indicators to interpret the nature of ancient upper mantle, processes of melt formation in the mantle, and large-scale geodynamic processes. In this sense, major and trace elements of unaltered Cr-spinel cores together with chromitite whole-rock PGE composition reveal that high-Al Camagüey and Moa-Baracoa chromite districts were formed in equilibrium with forearc basalts (FAB)-like magmas during the incipient intra-oceanic subduction of the proto-Caribbean lithosphere underneath the Caribbean lithosphere, in a subduction-initiation process. Conversely, the high-Cr Mayarí chromite district was formed in equilibrium with more hydrated melts of boninitic affinity, typical of a more advanced stage of the subduction-initiation process. Nonetheless, the shift from FAB-like to boninite-like magmatism in an intra-oceanic subduction is gradual. This progressive change is well-recorded in the Sagua de Tánamo district that contains both high-Al and high-Cr chromitites. Thus, the studied ophiolitic chromitites allow tracing the complete magmatic evolution of an intra-oceanic subduction-initiation process. Furthermore, our data exhibits that accessory Cr-spinel composition of peridotites surrounding chromitites can be used as a prospecting indicator to anticipate the composition of ophiolitic chromitite bodies. Systematically, Cr-spinel from dunites associated with high-Al chromite deposits have lower Cr# values compared to the accessory Cr-spinel from the associated harzburgites. On the contrary, Cr-spinel from dunites of high-Cr chromite deposits show higher Cr# compared to the accessory Cr-spinel from the host harzburgites.
000152189 536__ $$9info:eu-repo/grantAgreement/ES/MICINN PRE2020-092140$$9info:eu-repo/grantAgreement/ES/MINECO-MCIU/CGL2015-65824-P
000152189 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000152189 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000152189 700__ $$aProenza, J. A.
000152189 700__ $$aPujol-Solà, N.
000152189 700__ $$aGervilla, F.
000152189 700__ $$aVillanova-de-Benavent, C.
000152189 700__ $$0(orcid)0000-0002-9615-9168$$aColás, V.$$uUniversidad de Zaragoza
000152189 700__ $$aNúñez-Cambra, K.
000152189 700__ $$aPiñero-Pérez, E.
000152189 700__ $$aGarcia-Casco, A.
000152189 7102_ $$12000$$2120$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Cristalografía Mineralog.
000152189 773__ $$g(2025), [22 pp.]$$pMiner. Depos.$$tMINERALIUM DEPOSITA$$x0026-4598
000152189 8564_ $$s8074195$$uhttps://zaguan.unizar.es/record/152189/files/texto_completo.pdf$$yVersión publicada
000152189 8564_ $$s2085980$$uhttps://zaguan.unizar.es/record/152189/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000152189 909CO $$ooai:zaguan.unizar.es:152189$$particulos$$pdriver
000152189 951__ $$a2025-04-01-11:02:25
000152189 980__ $$aARTICLE