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Magmatic Enclaves And Evidence For Magma Mixing In The Oak Point Granite, Deer Isle, Maine, Usa, Ben Johnston
Magmatic Enclaves And Evidence For Magma Mixing In The Oak Point Granite, Deer Isle, Maine, Usa, Ben Johnston
Electronic Theses and Dissertations
The Coastal Maine Magmatic Province (CMMP) consists of over 100 post tectonic plutons with ages varying from Silurian to Carboniferous. Predominately, plutons are either felsic or mafic with little intermediate material. Several plutons within the CMMP show evidence for direct interaction of contemporaneous mafic and felsic magmas. These are classified as Mafic and Silicic Layered Intrusions (MASLI), a specific group of plutons with characteristics indicative of mafic magma replenishment into silicic magma chambers. While the Maine coast contains several MASLI type plutons, other plutons in the CMMP contain less definitive, more cryptic evidence that suggests interaction of mafic and silicic …