Geotrail Characterization based on Regional Geological History in the Unesco Global Geopark Ijen, East Java
Abdillah Baraas1,2, Mirzam Abdurracman2

1 Geological Engineering, Bandung Institute Of Technology
2 Ijen Aspiring UNESCO Global Geopark, East Java, Indonesia

Abstract

Ijen Geopark is one of the national-scale geoparks in East Java Province, precisely in Banyuwangi and Bondowoso Regency. The geological history of the Ijen Geopark began during the Oligocene-Miocene, which was marked by outcrops and hills from the volcano in the south of the geopark area due to the subduction of the Indo-Australian Plate to the Beneath Plate. About five million years ago these mountains had died, then due to changing of subduction^s, volcanoes were formed which are now to the north as far as fifty kilometers from their initial position. There are several mountains that are formed in the north, such as Mount Baluran, Mount Ringgit, Complex Ijen Purba, until the youngest is Mount Raung.
The evolution of tertiary volcanoes that once lived in the south and then was replaced with quarter volcanoes in the north becomes an interesting story when the journey is uncovered by geochemical data from product samples resulting from eruptions that have ever existed. The results of geochemical samples with a variety of constituent elements are the key to revealing the evolutionary history of volcanoes in this area. Of course, this travel story can be used as geotourism material for the history of the volcano that underlies the Ijen Geopark which is being proposed to become a UNESCO Global Geopark by the Government of Indonesia

Keywords: Volcano, Ijen Geopark, Geotrail, Geotourism

Topic: Interdisciplinary Geosciences