CHARACTERIZATION OF VOLCANIC ASH FROM THE 2017 AGUNG ERUPTION

• Main Author: DEVI NIM: 12314067, SRI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31045
• Institution: Institut Teknologi Bandung

<p align="justify">Characterization of volcanic products is one of the important efforts to recognize the potential of <br /> <br /> <br /> <br /> resources and disasters. Volcanic product that is easy to identify and characterize is the widely <br /> <br /> <br /> <br /> spread volcanic ash. Characterization of volcanic ash can provide important information about <br /> <br /> <br /> <br /> the spread of volcanic ash from a mountain during eruptions, for statistical correlations in <br /> <br /> <br /> <br /> exploratory interests, and the spread of fertile agricultural areas. Therefore, the characterization <br /> <br /> <br /> <br /> of volcanic ash is an important thing to do. But there are not many research about volcanic ash <br /> <br /> <br /> <br /> in Indonesia. This study focused on characterizing volcanic ash from the 2017 Mount Agung <br /> <br /> <br /> <br /> 2017 eruption, using rock magnetic methods, geochemical analysis, and petrography. Rock <br /> <br /> <br /> <br /> magnetism method used is measurement of magnetic susceptibility value on two different <br /> <br /> <br /> <br /> frequencies and hysteresis parameter of volcanic ash. Geochemical analysis was done using <br /> <br /> <br /> <br /> XRF to determine composition of major elements, and petrography analysis to know mineral <br /> <br /> <br /> <br /> content and texture of volcanic ash. The result of measurement using rock magnetism method <br /> <br /> <br /> <br /> shows that volcanic ash of Gunung Agung has magnetic susceptibility values vary from 778- <br /> <br /> <br /> <br /> 1008 × 10&#1051455;&#1051452;&#119898;&#1051447;/&#119896;&#119892;, the grain type is non-SP until the SP and non-SP grain mixtured, and the <br /> <br /> <br /> <br /> magnetic domain is the PSD and SP. The magnetic parameters significantly different compared <br /> <br /> <br /> <br /> to volcanic ash from 2014 Mount Kelud eruption, 2015 Sinabung eruption, and 2016 Soputan <br /> <br /> <br /> <br /> eruption. The result of measurement using rock magnetism method is integrated with the result <br /> <br /> <br /> <br /> geochemical analysis, and petrography used as the constituent parameters in the volcanic ash <br /> <br /> <br /> <br /> character of Mount Agung eruption 2017.<p align="justify">