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A local name for a variety of olivine monzodiorite consisting of abundant antiperthitic andesine, which may be mantled by anorthoclase, and by olivine, opaques and apatite with minor clinopyroxene and biotite.
Classification of SörkedaliteHide
Mineralogy of SörkedaliteHide
Essential minerals - these are minerals that are required within the classification of this rock:
|Feldspar > Alkali Feldspar > Anorthoclase||(Na,K)AlSi3O8|
|Feldspar > Plagioclase > Andesine||(Na,Ca)[Al(Si,Al)Si2O8]|
|Olivine||Equivalent to Fayalite-Forsterite Series; usually a more or less Fe-bearing forsterite.|
Non-essential minerals - these minerals are common, sometimes major components, but are not always present: