An experimental investigation of interaction between andesite and hyperacidic volcanic lake water
Minerals
Links
- More information: Publisher Index Page (via DOI)
- Open Access Version: Publisher Index Page
- Download citation as: RIS | Dublin Core
Abstract
Alteration in magmatic-hydrothermal systems leads to distinct changes in rock texture and mineralogy, and a strong redistribution of elements between fluid and rock. Here, we experimentally interacted andesite scoria with hyperacidic, high-sulfidation style fluids from Kawah Ijen volcano (Indonesia) at 25 and 100˚C, seeking to reproduce the textures observed in natural samples from this volcano, and to understand the element fluxes that accompany alteration. The susceptibility to alteration in the experiments is Cu-Fe-sulphide > calcic plagioclase > pyroxene > titano-magnetite > sodic plagioclase, with complete preservation of glass. Silicate minerals alter to opaline silica, and gypsum, barite and a Zr-phase precipitate. The selective alteration of the phenocryst minerals results in a preferential release of compatible elements, as the glass is the main incompatible element host. The experiments reproduce the alteration textures of the natural samples, including the preservation of glass, but the predicted compatible over incompatible element enrichment in the alteration element flux is not observed in the natural setting. This suggests that alteration at Kawah Ijen is dominated by lithologies that lack abundant glass, in particular lava flows where the glass has devitrified, despite these lava flows having a lower surface area compared to scoria.
Suggested Citation
van Hinsberg, V., Berlo, K., Lowenstern, J.B., 2020, An experimental investigation of interaction between andesite and hyperacidic volcanic lake water: Minerals, v. 10, no. 2, https://doi.org/10.3390/min10020096.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | An experimental investigation of interaction between andesite and hyperacidic volcanic lake water |
| Series title | Minerals |
| DOI | 10.3390/min10020096 |
| Volume | 10 |
| Issue | 2 |
| Publication Date | January 22, 2020 |
| Year Published | 2020 |
| Language | English |
| Publisher | MDPI |
| Contributing office(s) | Volcano Science Center |
| Description | 96, 26 p. |
| Country | Indonesia |
| Other Geospatial | Kawah Ijen |