A Late Cretaceous Adakitic intrusion from Northern Haiti: additional evidence for slab melting and implications for migration of ridge-trench-trench triple junction during the Cretaceous in the Greater Antilles

Review of Geochronologic and Geochemical Data of the Greater Antilles Volcanic Arc and Implications for the Evolution of Oceanic Arcs

“…120 Ma; Blanco‐Quintero et al., 2010), with the North American plate subducted beneath the Cuban arc and the South American plate subducted beneath the Hispaniola‐Puerto Rico branch of the arc. The eastern migration of the triple point during the mid‐Cretaceous in Hispaniola (Escuder‐Viruete, Contreras, Stein, et al., 2007) could have resulted from the segmentation of proto‐Caribbean ridge by transform faults (Rojas‐Agramonte et al., 2021), causing Late Cretaceous adakitic magmatism in Hispaniola. The location of the triple junction during the Late Cretaceous is not known, but a shift toward the east (present coordinates) can be inferred if it was connected to the Central Atlantic ridge.…”

“…We imposed a simple fourfold tectonic subdivision on the GAA based on a SW dipping subduction system agreed to by most scholars working in the Caribbean (e.g., Boschman et al, 2014;Escuder-Viruete, Diaz de Neira, et al, 2006;García-Casco et al, 2006;García-Casco, Iturralde-Vinent, & Pindell, 2008;Pindell & Kennan, 2009;Pindell et al, 2005;Rojas-Agramonte et al, 2021). In addition we used modern geographic relationships of rock units relative to the present position of the magmatic arc to put published data about GAA rocks into 4 tectonic domains: (a) forearc mélange; (b) forearc ophiolite; (c) magmatic arc (Cretaceous and Paleogene); and (d) retro-arc region, including metamorphic terranes and igneous rocks.…”

“…(2016), Rojas‐Agramonte et al. (2021), Schellekens (1998a), Schellekens (1998b), Torró, Proenza, Marchesi, et al. (2017), Torró, Camprubí, et al.…”