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A syenite containing alkali amphibole or pyroxene.
Classification of Peralkaline syeniteHide
Sub-divisions of Peralkaline syeniteHide
Mineralogy of Peralkaline syeniteHide
Essential minerals - these are minerals that are required within the classification of this rock:
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Late Cretaceous : 87.1 Ma to 78.7 Ma - based on data given below.
|Sample ID||Recorded age||Geologic Time||Dating method|
|1||87.1 to 78.7 Ma||Late Cretaceous||K-Ar|
|1||Catalão I carbonatite complex, Goiás, Brazil||Orris, G. J., Grauch, R. I. (2002) Rare Earth element mines, deposits, and occurenes. USGS Open-File Report 02-189, 1-174.|