Problem # Geologic Earth Model Shallow Sediment 7,200\'/s, pa 225 g/cm, Salt U 1
ID: 287941 • Letter: P
Question
Problem # Geologic Earth Model Shallow Sediment 7,200'/s, pa 225 g/cm, Salt U 15,400'/s, p 2.2 g/cm Deep Sediment U 12,500/s, = 2.4 g/cm, lgneous & Metamorphic Basement 21,000,/s, p . 2.6 g/cm? U 26,500/s, -3.3 g/cm? Mantle Given the above earth model, consider the major geologic boundaries, list which geophysical technique would be useful for constraining the different boundaries (2 very useful, 1 somewhat useful, O not useful Note-one particular box in this table carries 20% of the credit for this problem: Magnetics Heat Floww RefractionGravity Boundary Seismic Seafloor Interface Top Salt Base Salt Top Basement Moho Mantle PropertiesExplanation / Answer
BOUNDARY
REFLECTION SEISMIC
REFRCTION SEISMIC
GRAVITY
MAGNETIC
HEAT FLOW
SEA FLOOR
1
2
( as it is shallow depth problem )
0
0
0
SHALLOW /DEEP SEDIMENT INTERFACE
2
2
0
0
0
TOP SALT
2
(near the salt low travel time , hence it can be detected )
0
1
(as salt has low density )
1
(as salt has negative susceptibility )
0
BASE SALT
1
2
0
0
0
TOP BASEMENT
0
0
2
2
0
MOHO
1
2
0
0
0
MANTLE
PROPERTIES
1
1
0
0
2
BOUNDARY
REFLECTION SEISMIC
REFRCTION SEISMIC
GRAVITY
MAGNETIC
HEAT FLOW
SEA FLOOR
1
2
( as it is shallow depth problem )
0
0
0
SHALLOW /DEEP SEDIMENT INTERFACE
2
2
0
0
0
TOP SALT
2
(near the salt low travel time , hence it can be detected )
0
1
(as salt has low density )
1
(as salt has negative susceptibility )
0
BASE SALT
1
2
0
0
0
TOP BASEMENT
0
0
2
2
0
MOHO
1
2
0
0
0
MANTLE
PROPERTIES
1
1
0
0
2
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