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All Journal Journal of Geoscience, Engineering, Environment, and Technology Angkasa: Jurnal Ilmiah Bidang Teknologi
Laratmase, Lotong
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Computer Science & IT Earth & Planetary Sciences Engineering Environmental Science Physics

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Geochemical Correlation of Volcanic Rocks and Groundwater Quality in the Todoko-Ranu Complex, Sahu District, West Halmahera, North Maluku, Indonesia Laratmase, Lotong; Kusumayudha, Sari Bahagiarti; Harjanto, Agus
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.15295

Abstract

The research area is located in the Mount Todoko-ranu complex and its surroundings, Sahu District, West Halmahera Regency, North Maluku, Indonesia. This area geologically consists of Quaternary volcanic rocks with various petrochemical composition. On the other hand, natural water found in the research area generally physically appears turbid, while people who take water from this sites actually need clean water. As it is known, groundwater quality is influenced by the geochemistry of the aquifer through which it flows, therefore it is important to conduct a study on the geochemical correlation of volcanic rocks and groundwater quality in the research area. Thus, the aim of this research is to examine the geochemical characteristics of Mount Todoko-Ranu complex volcanic rocks, to analyze groundwater quality, and to study the correlation between the geochemical characteristics of rocks and the quality of groundwater in this volcanic complex. Methodology applied in this study was geological mapping, rock samples testing to determine the mineralogy chemical composition, groundwater, and surface water samples testing to identify their quality, and then correlation analysis. The results show that andesitic and basaltic-andesite of calc-alcaline volcanic rock complex is correlative to no dominant cation, but bicarbonate anion, or mixing type of natural water.
Fasies gunungapi, dan evolusi magmatik berdasarkan analisis geokimia Kompleks Todoko-Ranu, Kecamatan Sahu, Halmahera, Maluku Utara Kusumayudha, Sari Bahagiarti; Laratmase, Lotong; harjanto, Agus
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 17, No 1 (2025): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v17i1.2637

Abstract

The Todoko-Ranu volcanic complex is situated in the Sahu District, West Halmahera Regency, North Maluku. Geomorphologically, this area shows various volcanic landforms, reflecting the development and changes in the characteristics of eruptive activities. Eruption characteristic of a volcano is influenced by the physical and chemical properties of magma. Todoko-Ranu volcanic complex was built by volcanic products, including lava deposits, pyroclastic deposits and lahar deposits, which have different geochemical compositions. Due to the variety compositions of rocks, it is important to carry out studies on magmatic evolution based on geochemical analysis in the area. This study is useful for knowing the characteristics of the eruption at that time. Thus, the aim of this research is to study and analyze the geochemistry of volcanic rocks in order to determine the magmatic evolution of the Todoko-Ranu volcanic complex. The method applied is mapping the distribution of rocks and geological structures, testing rock samples for petrographic analysis and geochemical analysis, then studying magmatic processes. The results of the study show that the volcanic rocks of the Todoko-Ranu complex originate from calc-alcaline and tholeiitic magma which was formed from oceanic plate partial melting in a convergent tectonic environment, then underwent an evolution from alkaline to more acidic due to the process of magma differentiation and assimilation.
Co-Authors Agus Harjanto Kusumayudha, Sari Bahagiarti