Magmatic infiltration and melting in the lower crust and upper mantle beneath the Cima volcanic field, California

Article Abstract:

The melting in the upper mantle and lower crustal rock xenoliths of the Cima volcanic field, southern California, has been induced by infiltration of basaltic magmas between 7.5 Ma to the present. The difference in composition of glass pockets and inclusions, and replaced primary minerals of the rocks is due to mixing of infiltrated melts and primary minerals melts, partial crystallization, volatile expulsions and fractionation. The mixing of infiltrated melts with siliceous melts, formed from orthopyroxene, produces high silica melts.

Observations, Earth, Magma, Rocks, Igneous, Structure, Xenoliths, Cima, California

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Open system alkaline magmatism in northern Kenya: evidence from U-series disequilibria and radiogenic isotopes

Article Abstract:

A study was conducted to determine the nature of the magmatic plumbing system underneath the Emuruangogolak volcano's basalt-trachyte complex in northern Kenya. Open system alkaline magmatism were determined through the U-series disequilibria and isotopic data. Major and trace elements were seen on young basalts and trachytes which were composed of alkaline and hawaiite in varying volumes and measurements.

Analysis, Basalt, Kenya, Magmatism

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