Cl/B ratio of geothermal fluid around Slamet Volcano, Jawa Tengah, Indonesia

6th ITB International Geothermal Workshop

Harijoko, Agung^1 ; Juhri, Saefudin^1

Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada, Kompleks Kampus Fakultas Teknik UGM, Jl. Grafika No. 2, Yogyakarta, Indonesia^1

关键词: Chemical compositions;    Geothermal fluids;    Hot water;    Indonesia;    Sulfate-chloride;    Ternary diagrams;    Water types;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/103/1/012015/pdf
DOI  :  10.1088/1755-1315/103/1/012015

来源: IOP

【 摘 要 】

Geothermal manifestations occurred in four areas surrounding Slamet Volcano, such as Guci, Baturraden, Paguyangan, and Bantarkawung. These areas are located of about 7.5 km, 8 km, 25 km and 33 km from the summit of Slamet volcano, respectively. We analyzed the chemical composition of cold and hot hater in order to understand the genesis and hydrological the relationship of the hot springs. The plot on HCO3-Cl-SO4ternary diagram classified the hot water into four water types i.e. chloride-bicarbonate water (Bantarkawung), chloride water (Paguyangan), sulfate-chloride water (Baturraden), and bicarbonate water (Guci). The Cl/B ratio values indicate that the southern part of the Slamet volcano (Baturaden) hot springs have high Cl/B ratio compared to that of the northern hot springs (Guci area). While the hot springs in the western part (Paguyangan and Bantarkawung) are classified into high and low Cl/B ratio. This indicates that the hot springs in Paguyangan and Bantarkawung are the outflow of Baturraden and Guci.