If composition (or physical properties) changes abruptly at some interface, then seismic wave will both reflect off the interface and refract (or bend) and they pass through the interface. Two cases of wave refraction and reflection can be recognized. Reflection : A seismic reflection is generated when a wave impinges on a change in rock […]
Reflection and Refraction of Seismic Waves Read More »
There are various forces that act upon the plates to make them move. Three possible mechanism of plate motion – Convectional Currents :- Slab Pull :- Slab pull is thought to operate at subduction zones where the subducting oceanic plate becomes colder and denser than the surrounding mantle (gabbro metamorphosed into eclogite) and pulls the
CAUSES OF PLATE MOTION Read More »
Method Measured parameter Used physical property Suitable deposits type Seismic Travel time of reflected & refracted waves Density and Elastic modeVelocity and Acoustic Coal, Oil, Gas, Groundwater, Layered sedimentary basin, Ni- Cu- PGE in volcanic basal flows Gravity Gravity(Variation in earth’s gravitational field) Density contrast between the surrounding and host rock Massive sulfides, Chromite, Ni-Cu-
Geophysical Methods (Summery) Read More »
