Petrogenesis of Kelimutu Volcano and Its Surroundings: A Preliminary Study Based on Geochemical Data Muhammad Bahrun Najah (a*), Mirzam Abdurrachman (a), Muhammad Hafizh (a)
(a) Faculty of Earth Sciences and Technology, Bandung Institute of Technology Jalan Ganesha 10, Bandung 40132, Indonesia
*m.bahrun29photo[at]gmail.com
Abstract
Kelimutu Volcano has a highest point is 1639 masl, it is located in Ende Regency, East Nusa Tenggara. The volcano has a characteristic in the form of three crater lakes at the summit. The volcano is located in the southern part of Flores Island, East Nusa Tenggara, it was formed as a result of the interaction between the Indo Australian Plate and the Eurasian Plate. The tectonic setting of Kelimutu Volcano and its surroundings is still not well defined. One of the causes of this is the lack of rock geochemical data which is one of the data to define tectonic setting. Rock geochemical data in this study are used to define tectonic setting through a petrogenesis approach. Geochemical data were obtained through XRF analysis (for major components) and ICP MS analysis (for trace components). Discriminant diagrams are used to determine the tectonic setting with parameters in the form of main components and trace components. Based on the results of the plot of the discriminant diagram of trace components that consist of Zr/Y Ti/Y, Ti/100 Zr Sr/2, and TiO2 P2O5 MnO so that The Kelimutu Volcano is included in the tectonic setting in the form of island arcs.
Keywords: Kelimutu Volcano, Petrogenesis, Geochemical, Island Arc
