FELDSPAR SATURATION STATE IN NATURAL WATERS
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Stefánsson A. | |
dc.contributor.author | Arnórsson S. | |
dc.date.accessioned | 2021-01-29T03:52:24Z | |
dc.date.available | 2021-01-29T03:52:24Z | |
dc.date.issued | 2000 | |
dc.identifier | https://elibrary.ru/item.asp?id=13681820 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 2000, 64, 15, 2567-2584 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/23968 | |
dc.description.abstract | The saturation state of feldspar minerals in natural waters ranging from 0°C to over 300°C was studied. Waters above 200°C have closely approached equilibrium with microcline and low-albite. This is consistent with the occurrence of these minerals as hydrothermal minerals in active geothermal systems with temperature in excess of some 200°C. The Na+/K+ activity ratio of geothermal waters with temperature as low as 50°C closely approaches that predicted from thermodynamic data for the reaction low-albite + K+ = microcline + Na+, suggesting that Na and K ion activities in these geothermal waters are controlled by simultaneous equilibrium with these two feldspars. Geothermal waters are undersaturated with primary disordered plagioclases and alkali-feldspars of compositions typically found in volcanic rocks. Accordingly these feldspars tend to dissolve in such waters simultaneously with precipitation of ordered alkali-feldspars. Surface- and non-thermal groundwaters are usually undersaturated with respect to igneous and metamorphic feldspars regardless of composition and Al-Si ordering and tend, therefore, to dissolve under weathering conditions. | |
dc.title | FELDSPAR SATURATION STATE IN NATURAL WATERS | |
dc.type | Статья |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru