GATE-2015
Q.47:
A spherical body with its center located at depth of 1040 m gives a
symmetric residual gravity anomaly high with Δgmax=5.2 m
Gal. If the same anomaly were to be obtained over a 2-D horizontal
cylinder, the depth to the center of the horizontal cylinder (in m)
is........
Solution:
Sphere,
the gravity anomaly
The
depth to the center of the spherical body is
z=
0.62 X1/2 ( full width)
z=
1.3 x1/2 ( half -width)
z=
1040 m for a spherical body
half-width
(x1/2)= 1040 /1.3
= 800 m
For
a 2-D horizontal cylinder,
Depth
to the center of the body
z=
0.5 X1/2 (full width)
z=
x1/2 (half width)
The
same anomaly were to be obtained over a 2-D horizontal cylinder, the
depth to the center of the horizontal cylinder
z=
x1/2
x1/2
for a spherical body = 800 m
z=
800 m
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good job man
ReplyDeleteThe gravity anamoli over a vertical rod(extending down to infinity) buried a depth of 100m is 20 mgal.If the rod is buried at a depth of 50m,the gravity anomaly would be
ReplyDeleteA. 15mgal B. 10 mgal C. 40mgal 4. 80 mgal
May i know which year CSIR or GATE question it is?
DeleteJune 2015 question no 90
Deleteplease check full width and half width formulaes ,i think those are written wrongly ,check it onces
ReplyDelete