Petrology Chapter 8Gautam Sen
Plates & Mid-oceanic Ridges
Types of Spreading CenterRidge offset by aTransform fault
Overlapping Spreading Center
Continuous RidgeAxis with a smallbend
Relief map of EPR
REE in Basalts from MOR & Hawaii
Nd-Sr isotope composition of MORB vs. Hawaiian tholeiites
Iceland: located on the MOR system
Deeper Structure of a Fast Spreading Ridge
Deeper Structure of a Slow Spreading Ridge
Fractionation of MAR vs. EPR
Ridge evolution
Ridge extension & passive melting
Na8 Estimation
Na8 vs. Crustal thickness
Na8 vs. Fe8 Relationships
Generation of MORB: Thin Crust
Generation of MORB: Thick Crust
MORB Generation: Volatiles & Pyroxenite source considered
Melt Accumulation & Dispersal of residual mantle
Hawaii-Emperor Volcanic Chain
Tuzo Wilson’s Model: Origin of Hawaiian Chain
Growth stages of a Hawaiian volcano
Normative Composition of Hawaiian tholeiites & Alkalic lavas
MgO-TiO2: MORB vs. Hawaiian basalts
Pb-isotopes: Loa vs Kea Volcanoes
MORB vs. Hawaiian-Emperor Seamounts: Nd/Sr Isotopes
Hawaiian Mantle Xenoliths: P-T
Nd-Sr Isotope composition of Hawaiian spinel peridotite xenoliths and Lavas
Os-Hf Isotope composition of the xenoliths compared with lavas
Lithosphere beneath Oahu
Seismic Trace of the Hawaiian Hot Spot
FeO*-SiO2 of Hawaiian Tholeiites: Koolau is a special case
Hauri’s Zoned Plume Model
Sobolev: Arguments for a Ni-rich Pyroxenite in the source for Hawaiian magmas
Sobolev: Arguments for a Ni-rich Pyroxenite in the source for Hawaiian magmas - 2
Sobolev et al. Melting Model for Hawaii
P-T Conditions of multisaturation for Hawaii
Presnall’s mantle polybaric liquids and Hawaiian primitive glasses
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