petrology – chapter 9
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Petrology – Chapter 9. Gautam Sen. Flood Basalts & Hot Spot Tracks. “Plume Heads & Tail” Model. Central Atlantic Magmatic Province (CAMP). Flood Basalts & Mass Extinctions. Columbia River Basalt. FeO* & TiO 2 in Flood Basalt provinces. Continued…. Deccan Traps. Deccan Trap lava flows. - PowerPoint PPT PresentationTRANSCRIPT
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Petrology – Chapter 9Gautam Sen
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Flood Basalts & Hot Spot Tracks
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“Plume Heads & Tail” Model
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Central Atlantic Magmatic Province (CAMP)
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Flood Basalts & Mass Extinctions
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Columbia River Basalt
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FeO* & TiO2 in Flood Basalt provinces
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Continued…
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Deccan Traps
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Deccan Trap lava flows
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India running over Reunion-Deccan plume at 68-65 Ma
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Ages of Deccan Traps
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Giant Plagioclase Basalt flows in the Western Ghats near Mumbai
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Deccan Pyroxenes
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TAS Diagram for Deccan
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REE in Deccan Basalts
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Deccan Nd-Sr Isotopes
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Fe-rich Source for Deccan
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Model for the Generation of Deccan Magmas
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Columbia River Basalts
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Cross-section of Pacific NW
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Age of CRBG
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CRBG: Volumes of Individual Formations estimated by Hooper
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Spatial distribution of various CRBG formations
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Major element composition
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REE of CRBG
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Isotopes of CRBG
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Geist’s Model
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Camp & Hanan Model for theOrigin of the CRBG