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The tholeiitic dolerites that crop out in three diapirs of the SE of the Iberian Chain (Alfarp, Quesa and Lugar Nuevo de Fenollet, Valencia), are the expression of evolved (low Ni, Cr and mg* values) basic magmas, injected into poorly lithified sediments (lutites, marls and gypsum) which represent the Upper Triassic (Keuper facies)-Hettangian boundary, developing sills with reduced thickness. Their mineral and whole-rock geochemical compositions indicate a continental tholeiitic affinity and certain similarities to a MORB composition and, on the other hand, show that the Alfarp dolerites represent the less evolved compositions, whereas the Fenollet dolerites show a significantly greater differentiation. These rocks are the expression of a shallow magmatism, related to the initial stages of the mesozoic rifting that affected the intersection of the Celtiberian Rift with the Betic Graben. This magmatism is clearly different of the isochronous tholeiitic magmatism (dolerites) which crops out at the Pyrenees and Betic.  Las doleritas tole&#237;ticas aflorantes en diapiros tri&#225;sicos del SE de la Cordillera Ib&#233;rica (Alfarp, Quesa y Lugar Nuevo de Fenollet, SE de Valencia) representan l&#237;quidos diferenciados (valores bajos en Ni, Cr y mg*) emplazados como sills, de escaso espesor, por debajo de sedimentos (arcillas, margas y yesos), poco consolidados, del l&#237;mite Tri&#225;sico superior-Hettangiense. Su composici&#243;n mineral y geoqu&#237;mica, con afinidad tole&#237;tica continental y similitud a MORB, evidencia el car&#225;cter menos diferenciado de las doleritas de Alfarp, respecto a las de Quesa, siendo las doleritas aflorantes en Fenollet las que presentan una composici&#243;n m&#225;s evolucionada. Estas doleritas son la expresi&#243;n de un magmatismo poco profundo, asociado al inicio del rifting mesozoico, desarrollado en la zona de intersecci&#243;n del rift celtib&#233;rico y el borde NE del surco b&#233;tico. Este magmatismo presenta claras diferencias respecto a las doleritas tole&#237;ticas, menos diferenciadas, de los dominios pirenaico y b&#233;tico

Las doleritas toleíticas triásicas del sector SE de la Cordillera Ibérica: petrología y geoquímica