Clay minerals formed by hydrothermal alteration of basaltic rocks in Icelandic geothermal fields
- 30 September 1975
- journal article
- research article
- Published by Taylor & Francis in Geologiska Föreningen i Stockholm Förhandlingar
- Vol. 97 (3) , 289-292
- https://doi.org/10.1080/11035897509454314
Abstract
The types of clay minerals formed by hydrothermal alteration of basaltic rocks in geothermal fields in Iceland have been a matter of interest for some time. The fine-grained nature and poor crystallinity of the minerals make investigation difficult. X-ray-diffraction analyses suggest the presence of numerous different minerals. DTA analyses, supported by infrared-absorption analyses, show the mineralogy to be much simpler. It is suggested that a gradual transformation of a smectite rich in iron and magnesium into chlorite occurs at temperatures of 200–230°C.Keywords
This publication has 2 references indexed in Scilit:
- Chemistry and distribution pattern of recent basaltic rocks in IcelandLithos, 1972
- High temperature alteration minerals and thermal brines, Reykjanes, IcelandContributions to Mineralogy and Petrology, 1972