Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/12185
Authors: | Caudron, Corentin* Bernard, Alain* Murphy, Sam* Inguaggiato, Salvatore* Gunawan, Hendra* |
Title: | Volcano-hydrothermal system and activity of Sirung volcano (Pantar Island, Indonesia) | Journal: | Journal of Volcanology and Geothermal Research | Series/Report no.: | /357 (2018) | Issue Date: | 30-Apr-2018 | DOI: | 10.1016/j.jvolgeores.2018.04.011 | Abstract: | Sirung is a frequently active volcano located in the remote parts of Western Timor (Indonesia). Sirung has a crater with several hydrothermal features including a crater lake. We present a timeseries of satellite images of the lake and chemical and isotope data from the hyperacid hydrothermal system. The fluids sampled in the crater present the typical features of hyperacidic systems with high TDS, low pH and d34SHSO4 –d34SS0 among the highest for such lakes. The cations concentrations are predominantly controlled by the precipitation of alunite, jarosite, silica phases, native sulfur and pyrite which dominate the shallow portions of the hydrothermal system. These minerals may control shallow sealing processes thought to trigger phreatic eruptions elsewhere. Sparse Mg/Cl and SO4/Cl ratios and lake parameters derived from satellite images suggest gradual increase in heat and gas flux, most likely SO2-rich, prior to the 2012 phreatic eruption. An acidic river was sampled 8 km far from the crater and is genetically linked with the fluids rising toward the active crater. This river would therefore be a relevant target for future remote monitoring purposes. Finally, several wells and springs largely exceeded the World Health Organization toxicity limits in total arsenic and fluoride. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
Sirung volcano_Indonesia.pdf | 4.05 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
50
1
checked on Feb 7, 2021
Page view(s)
137
checked on Apr 24, 2024
Download(s)
4
checked on Apr 24, 2024