I have some EPMA mineral chemistry data of albite and K-feldspar which are formed by metasomatic process. The analyses were done at 15keV/10nA with 1-2micron beam.
1. What are the various plots I can attempt for interpretation?
2. Whether I can use two-feldspar-geothermobarometry? Reference if any.
3. The FeO content is significant (0.1 to 2.5%). Could it be due to sub-micron sized iron rich phase (oxide/sulphide) within feldspar nanopores, I am not sure.
4. Is it possible that Fe ion occurs as a part of feldspar mineral structure? Fe+3 replacing Al+3 may be possible, but can Fe+2 take the void spaces in crystal lattice of feldspar?
Please guide me if you have worked on similar data or any references. Thank you
http://eprints.gla.ac.uk/104419/1/104419.pdf
Routine characterization and interpretation of complex alkali feldspar intergrowths.
I think it will be a good article with good bibliography but of course it can't answer to hole your questions. Maybe you will find some answers in bibliography. Good Luck in your work.
Dr Adel, basically the host rocks are metasedimentary in nature. However, the samples are from the mineralised zone where the host rock has been metasomatised. Hence, the feldspars (both albite and K-feldspars) of two generations are clearly evident. EPMA analysis was focused on the feldspars developed during metasomatic process.
- Badges
- Science topic
- Similar topics
- Philosophy
- Esthetics
- Interpretation