Petrology of Ophiolite Complex of Ciletuh Geopark, West Java, Indonesia: A Preliminary Study

Petrology of Ophiolite Complex of Ciletuh Geopark, West Java, Indonesia: A Preliminary Study

The ophiolite complexes of Ciletuh area are located in Ciletuh Bay, Sukabumi, west Java. This area is becomes popular among the adventure traveler in Indonesia. This area is being preparation to become first National Geopark in west Java. The Ciletuh complex is the only region that has oldest rock formation cropping out in west Java that composed of very rare ophiolite complexes among the young volcanic rocks cover of west Java Island. The occurrence of this ophiolite is very rare in Java Island, only three regions are occurred: Ciletuh in west Java, Karangsambung and Bayat in Central Java. In Ciletuh region, three major distributions of ophiolite are identified, from north to south those are Gunung Badak, Gunung Beas and Ujungsodong areas. The area is located on the south of present day active volcanic arc. Offshore lies the java trench, a forearc basin and accretionary prism associated with the northerly subduction of the India Oceanic Plate (Fig.1). Duyfjes (1940) mentioned that the tectonic of Ciletuh area is complicated. This study is aimed to identify the characteristics ophiolite complexes of Ciletuh region as geological heritage. Later on this data is used to delineate the boundary of proposed area as “Geopark” and more detailed is to understand its relationship with other ophiolite complexes in Central Java and Meratus in south Kalimantan.