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This study reports the occurrence and petrologic significance of Ti-clinohumite for the first time in the Cienaga skarn, Sierra Nevada de Santa Marta Massif. Ti-Clinohumite occurs as thin bands hosted in the Cienaga Marbles of lower Cretaceous age, which consist of quartz-wollastonite-diopside-garnet-clinohumite marbles. We focus the attention on the occurrence of Ti-clinohumite-bearing domains, highlighting some interesting textures as well as the mineralogy and chemistry of the Ti-clinohumite. On the basis of its geologic situation, petrography, mineral composition and metamorphic history, we discuss the origin of Ti-clinohumite. Resumen El estudio reporta la presencia y el significado petrologico de Ti-clinohumita por primera vez en marmoles del deposito de skarn de Cienaga, Macizo Sierra Nevada de Santa Marta, de edad Cretacico inferior. La Ti-clinohumita ocurre como bandas delgadas en marmoles de cuarzo-wollastonita-diopsido-granateclinohumita. Centramos la atencion en la ocurrencia de los dominios con Ti-clinohumita, destacando algunas de sus texturas interesantes, asi como la mineralogia y la quimica de la Ti-clinohumita. Con base al contexto geologico, a las caracteristicas petrograficas, a la composicion mineral y a la historia metamorfica, se discute el origen de la Ti-clinohumita.

Ti-clinohumite in the Ciénaga skarn-type mineralogy, Sierra Nevada de Santa Marta Massif (Colombia): Occurrence and petrologic significance