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Chapter 10: Mantle Melting and the Generation of Basaltic Magma

Chapter 10: Mantle Melting and the Generation of Basaltic Magma. Geology 346- Petrology. 2 principal types of basalt in the ocean basins . Tholeiitic Basalt and Alkaline Basalt. Common petrographic differences between tholeiitic and alkaline basalts. Table 10.1. Tholeiitic Basalt.

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Diversification of Magmas

Diversification of Magmas. Differentiation of magmas. Crystal-melt fractionation Seen best in layered mafic intrusions Large intrusions in short time period. Layered mafic intrusions. 2. (km. ). Area. Name. Age. Location. Bushveld. Precambrian. S. Africa. 66,000. Dufek. Jurassic.

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Chapter 10: Mantle Melting and the Generation of Basaltic Magma

Diversification of Magmas