Dieng geothermal field (Java)
Java, Indonesia
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Geothermal systems of Java (Sunda arc) sampled in 2012-2013 by Purnomo et al. (2016); Quaternary volcanic systems receive magmatic fluids, fault-hosted systems in the south of the island mostly neutral waters. Coordinates not published (map only). Dieng caldera.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 2.7 ± 2.22 ‰ | 0.27 / 4.62 ‰ | 3 | hot spring water (dissolved boron) Mean and standard deviation recalculated from 3 analyses, +0.27 to +4.62 (J60 Kawah Sileri +0.27; J61 Pulosari +4.62; J64 Bitingan +3.20). 54 to 60 °C, pH 6.2 to 7.3, 2.1 to 6.7 mg/L B. | Purnomo et al. (2016), Boron isotope variations in geothermal systems on Java, Indonesia,… |
| 34.86 ‰ | 1 | acid sulphate crater lake water (dissolved boron) Single analysis (J59 Kawah Sikidang). 87 °C, pH 2.5, 73.29 mg/L B, 14.4 mg/L Cl: close to seawater with no marine input (Cl/B five orders of magnitude lower); evaporation without outflow according to the authors, a hypothesis to be tested. | Purnomo et al. (2016), Boron isotope variations in geothermal systems on Java, Indonesia,… | |
| 0.12 ± 0.2 ‰ | −0.02 / 0.26 ‰ | 2 | geothermal well brine (dissolved boron) Mean and standard deviation recalculated from 2 analyses, -0.02 to +0.26 (J70 AFT-28 +0.26; J71 PAD-7C -0.02). 150 °C, 593.6 and 262.5 mg/L B; deep reservoir, andesite leaching. δ18O and δ2H columns apparently swapped in the source for these two rows. | Purnomo et al. (2016), Boron isotope variations in geothermal systems on Java, Indonesia,… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Dieng geothermal field (Java), isotope signatures. https://www.isofind.tech/isotopes/en/sites/champ-geothermal-de-dieng-java/ (accessed 2026-10-19).
@misc{isofind2026dienggeothermalfieldjavaisoto,
title = {Dieng geothermal field (Java), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/champ-geothermal-de-dieng-java/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19