The relationship between chondri and matrix of chondrite as indicator of the origin and layering of planets of the solar system

The two-stage evolution of chondrite parent-planets, viz., protoplanet evolution (within giant planets, which are parent planets to chondrite planets) and the planet stage proper (after the loss of giant fluid envelopes by the parent planets) determines the petrological specific features of ordinary chondrites. Relics of protoplanet evolution include splitting of magma into chondri and a diamondiferous matrix fixed in chondrite structure. Chondrites of volcanic (I), subvolcanic (II), and plutonic (III) facies consolidate during the proper planetary stage of evolution of their parent planets. Chondri in chondrites crystallize before the more fluid kamacite matrix, which replaces the chondri and affects a fluid impact upon them. Replacement of chondri with olivine and replacement of matrix kamacite with olivine transforms the matrix into a secondary and substantially olivine-rich substance, which strongly complicates the chondri-matrix relationship, shading its primary magmatic nature.