Boron isotope variations in geothermal systems on Java, Indonesia
Veröffentlichungsdatum
2016-02-01
Zusammenfassung
This paper presents δ11B data for hot springs, hot acid crater lakes, geothermal brines and a steam vent from Java, Indonesia. The processes that produce a large range of the δ11B values were investigated, including the possible input of seawater as well as the contrast δ11B compositions of acid sulfate and acid chloride crater lakes. The δ11B values of hot springs ranged from − 2.4 to + 28.7‰ and acid crater lakes ranged from + 0.6 to + 34.9‰. The δ11B and Cl/B values in waters from the Parangtritis and Krakal geothermal systems confirmed seawater input. The δ11B values of acid sulfate crater lakes ranged from + 5.5 to + 34.9‰ and were higher than the δ11B of + 0.6‰ of the acid chloride crater lake. The heavier δ11B in the acid sulfate crater lakes was caused by a combination of vapor phase addition and further enrichment due to evaporation and B adsorption onto clay minerals. In contrast, the light δ11B of the acid chloride crater lake was a result of acid water-rocks interaction. The correlations of δ11B composition with δ18O and δ2H indicated that the B isotope corresponded to their groundwater mixing sources, but not for J21 (Segaran) and J48 (Cikundul) that underwent 11B isotope enrichment by B adsorption into minerals.
Schlagwörter
Java
;
boron isotope
;
Geothermal water
;
Crater lake
;
Seawater input
Verlag
Elsevier Science
Institution
Fachbereich
Institute
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Band
311
Startseite
1
Endseite
8
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Sprache
Englisch
Dateien![Vorschaubild]()
Lade...
Name
Purnomo_Pichler_You_Boron isotope variations in geothermal systems on Java, Indonesia_2016_accepted-version.pdf
Size
1.85 MB
Format
Adobe PDF
Checksum
(MD5):ddd20b6a1cee5c13b969206a483c3cda