EESA06H3 Lecture Notes - Lecture 4: Mid-Ocean Ridge, Igneous Rock, Oceanic Crust
Document Summary
In these newly form ocean basins, we get new organic sediment and minerals deposits which is important in oil and gas exploration. So it is really important to know how these basins form: rifts is where supercontinents begin to breakup. Slide 2-1: embryonic ocean would be the red sea and east african rift. Pacific ocean is the dying ocean because the surrounding continents are being pushed over the floor of the ocean which we call it subduction. Lithosphere ridged plate which is the layer moving over the asthenosphere: predominate rock type in oceanic crust is basalt contain iron, magnesium and it"s very dense. Those rocks or giant plumes that rise to the surface undergo decompression which is a pressure taken off as it starts to cool and they undergo melting. What was rock becomes magma: there is an opposite process happening relative to the decompression melting" which is.
