Page 20 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

3

Impedance
(V)
(Q)
(V)
V,
Techniques
(x)
Remanent
Velocity,
Seismic Velocity
Seismic Velocity
(p)
Attenuation
Susceptibility
Magnetic
Density
(Seismic
Acoustic
Geophysical
and
and
of
_
(g)
Overview
Gravitational ag
G
and
of
Acceleration
410
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Direction
Strength
uonoy punoi

Source:
Magnetics
Reflection
Refraction
Earthquake
Gravity
Natural
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q1ala
OINSIAS
s
TECHNIQUES GEOPHYSICAL OF OVERVIEW surface the at made commonly are properties induced or natural of Measurements ) Physics interprets geophysics acceleration). Applied example, gravitational (for Earth of the en dis- example, density Earth (for the within of properties terms in observations “those Ns i tech- Geophysical acceleration). gravitational the change locally that tributions 2 . hea
might cause such
result in a predicted gravity
depth (z) below
no subsurface information.
a sphere of radius (R) and
boundary,
materials (geology) with
that
mass buried
topography, the crust/mantle
(p)
from
a
by such
result
$
s=+=+=: by combining obsefvations of Earth illustrating surface geology, with would (Ag,) that a model of subsurface density distribution these three depth certain measurements in system book this in basic are the to appreciate Earth’s geochronology, be may
Predicted from Mode] Cross-section Earth’s gravity field predicts the change in gravity caused the observed surface geology and shows density distributions that between transition; a at equalizes of geophysical covered flow) heat them example, but they courses.
Introduction Geology ie Earth's Surface ? the subsurface a) (physics). in equation field. along with relationship the is lithosphere/asthenosphere pressure the utility lithosphere/asthenosphere methods geophysical and magnetics, helping in methods (for important, are advanced geophysics
1 ee (epw) Geophysics aims to interpret phenomena parameter. the change mathematical Observed change in gravity agrees with observed. focus whereby appreciate and crust The gravity, particularly Other methods) more
Chapter a) Ajewouy AyAks5 (Ap). The model to that primary A the and isostasy, thus of the quake, dents, tectonics. electrical or istry
2 1.1 observations of physical b) Model of a physical density contrast
FIGURE the surface. c) a change. The anomaly close