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PRESENTATION OVERVIEW
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Tectonic Setting and Motivations
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DESERT Project
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Receiver Function Method
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Results
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Crust-Mantle Boundary
➔
Determination of crustal thickness and Vp/Vs using two methods and error
analysis
•
A Lower Crustal Discontinuity East of the DST
➔
Discussion of two methods (inversion and forward modeling)
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Upper Mantle Transition Zone
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MOHSIN
AYMAN MOHSIN
Mediterranean Sea
Arabian Plate
S in
S u b a ip la
te
African Plate
Automatic GEOFON Global Seismic Monitor
Dead Sea Region
Magnitude: 5.5
Origin time: 2004/02/11 08:15:01 UTC
Longitude: 35.8°E
Latitude: 31.6°
ID
ID02
ID01
ID03
ID12
ID26
ID05
ID15
ID07
ID04
ID17
ID08
ID21
JS02
ID16
JW01
JK01
ID19
ID27
ID06
ID28
JK04
JD05
JK05
JW05
JD06
ID31
ID32
JS03
JW09
JS06
JS07
VP/Vs (TT) Vp/Vs (ZK)
1.74
1.74
1.75
1.74
1.72
1.73
1.85
1.83
1.76
1.77
1.81
1.81
1.76
1.75
1.8
1.81
1.77
1.75
1.8
1.81
1.8
1.8
1.77
1.75
1.73
1.75
1.92
1.79
1.68
1.77
1.77
1.83
1.57
1.9
1.77
1.76
1.76
1.76
1.78
1.72
2.1
1.75
1.74
1.74
1.83
1.81
1.73
1.76
1.76
1.83
1.74
1.89* 1.77
1.8
1.79
1.76
1.75
1.79
1.75
1.70* 1.77
1.73
1.73
1.74
Dif
0
0.01
0.01
0.02
0.01
0
0.01
0.01
0.02
0.01
0
0.02
0.02
0.09
0.02
0.05
0.01
0.01
0.01
0.17
0.01
0.03
0.03
0
0.01
0.01
0.03
0.4
0.02
0.01
0
H TT (km) H ZK (km)
31
32
31
31
32
31
32
31
33
33
32
31
32
32
32
32
32
32
32
33
33
32
32
33
33
32
33
33
31
34
34
33
32
34
34
35
37
36
33
32
38
32
33
32
31
32
31
35
34
34
34
35
35
35
37
36
33
32
38
32
33
32
Dif
1
0
1
1
0
1
0
0
0
1
1
1
1
2
1
0
1
0
1
2
1
1
0
0
1
0
0
0
0
0
0
Concluding Remarks
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The crustal structure is about 33 km east and west of the Dead Sea
Transform ±2 km topography. Exactly at the location of the
controlled source line is an exceptional local depression of the
Moho in Jordan (~38 km).
The resulting Moho depth profile agrees well with the controlled
source techniques.
There is clear difference in the internal crustal structure east and
west of the DST. The western crust is fairly homogeneous, while
the eastern crust has a strong lower crustal reflector.
The DST is of deep seated nature extending at least to the Moho.
There are no clear systematics in the distribution of the Vp/Vs
ratios.
The P-to-S converted phases from the 410 and 660 km
discontinuities are not typical for a continental upper mantle. They
are delayed by 2 sec with respect to IASP91 . This would suggest
that the upper mantle velocity above 410 km is 3-4% slower than
the standard model.