Volcanostratigraphy of Cimaung Valley: Application and Combination of Landsat Imagery and Field Observations of Cimaung Sub-District, Bandung District, West Java Billy Petrus Wehelmus (a*), Rifo Rausyan Fikri (a), Elvis Okvianta (a), Taufik Ismail (b,c), Riyan Hidyatulloh (a), Muhammad Agung Gumilar (a), Dwigko Kurniawan Wandray (a), Mirzam Abdurrachman (b)
a) Department of Geology, Indonesia College of Mineral and Technology, Bandung 40263, Indonesia
billysaa0612[at]gmail.com
b) Faculty of Earth Sciences and Technology, Bandung Institute of Technology, Bandung 40132, Indonesia
c) Center of Geological Disaster Research, Indonesia Agency of Research and Innovation, Bandung 40135, Indonesia
Abstract
The research area is composed of rocks from the activities of three volcanoes, namely Mount Tanjaknangsi in the west, Mount Malabar in the east and Mount Tilu in the south which is located in Bandung Regency, West Java Province. This study aims to determine the surface geology mapped at a scale of 1:12,500 and to determine the volcanostratigraphy and geological history that make up the study area. Vulcanostratigraphy is made by integrating literature studies, direct field observations of rock outcrops, and petrographic analysis and analysis of satellite images in the form of topographic maps and satellite images, namely DEM (Digital Elevation Model) and ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer). Results of the observations and analysis are poured into outcrop observation point maps, volcanostratigraphic profile maps, geological maps, cross-sectional geology and geological history blocks. Volcanostratigraphy of the study area is divided into 3 khuluk and 8 volcanic dunes and 24 rock units consisting of 18 lava units, 5 pyroclastic units and 1 lahar unit. There are at least 3 phases of volcanic formation in the geological history of the study area. The geological structure that develops in the study area is in the form of a primary structure, namely a joint with sheets showing an activity of lava flow and a secondary structure in the form of a volcanic crater structure which shows the remains of the eruption center of a volcano.
Keywords: Vulcanostratigraphy- Landsat Imagery- Bandung
