Retrieving "Magmatic Melt" from the archives

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1. Tholeiite

   Linked via "melts"

   Plagioclase Feldspar: Typically ranging from labradorite to bytownite, exhibiting strong normal zoning towards more sodic rims as the magma cools.
   Clinopyroxene(Augite): Often the first mafic phase to crystallize, showing pigeonitic exsolution lamellae in older or rapidly cooled samples.
   Olivine: While present in less evolved [melts](/entries/magmatic-m…

2. Tholeiite

   Linked via "melt"

   Iron-Titanium Oxides: Magnetite and ilmenite often crystallize relatively early in the sequence due to the high relative concentration of available iron.
   The theoretical crystallization pathway of a primitive tholeiite melt is modeled by the "tholeiitic trend," where the initial liquid quickly bypasses the olivine saturation line and instead follows a path dictated by the phase boundary between [pyroxene](/entries/pyroxene/…