0_Contents - Ayman Mohsen A RECEIVER FUNCTION STUDY OF THE...

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Ayman Mohsen A RECEIVER FUNCTION STUDY OF THE CRUST AND UPPER MANTLE ACROSS THE DEAD SEA TRANSFORM Dissertation zur Erlangung des Doktorgrades im Fachbereich Geowissenschaften der Freien Universität Berlin vorgelegt von Ayman Mohsen February 2004
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Erstgutachter: Prof. Dr. Rainer Kind Zweitgutachter: Prof. Dr. Serge Shapiro Tag der Disputation: 13. February 2004
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TABLE OF CONTENTS Abstract 5 Zusammenfassung (German Summary) 7 Dedication 9 Chapter 1 Introduction 10 1.1 Objectives 13 1.2 DESERT Project 13 1.3 Outline of this Thesis Chapter 2 Geology, Tectonic Setting and Seismicity 2.1 Geological Setting 16 2.2 Tectonic Setting 20 2.2.1 Introduction 20 2.2.2 Deformations 22 2.2.3 Displacement and Motion 23 2.2.4 Dead Sea Deformation 24 2.2.5 General Features of the DST 24 2.3 Seismicity 25 2.3.1 Instrumentally Recorded Seismicity 25 2.3.2 Seismicity of the Gulf of Aqaba-Wadi Araba Region 28 2.3.3 Historical Seismicity 30 Chapter 3 Receiver Function Method 3.1 Introduction 33 3.2 Receiver Function Processing 35 3.2.1 Restitution 35 3.2.2 Rotation 37 3.2.3 Deconvolution 38 3.2.4 Moveout Corrections 40 3.2.5 Inversion 43
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3.2.6 Crustal Thickness and Vp/Vs Estimation 44 Chapter 4 Data 4.1 Introduction 48 4.2 Seismic Stations 48 4.3 Data Selection 49 4.4 Characteristics of the Dataset 52 Chapter 5 Results and Discussions 5.1 Introduction 54 5.2 Data Examples of some Individual Stations 54 5.3 Seismic Image from Receiver Function Analysis 56 5.4 Moho Depth and Vp/Vs Determinations 59 5.5 A Lower Crustal Discontinuity (LCD) East of the DST 78 5.6 Comparison of Results 84 5.7 Upper Mantle Discontinuities 87 Chapter 6 Concluding Remarks 6.1 Introduction 92 6.2 Crust-Mantle Boundary 92 6.3 Lower Crustal Discontinuity 93 6.4 The 410 and 660 Dsicontinuities 93 Acknowledgments 95 References 96 Appendix A 109 Appendix B 113 Appendix C 116 Lebenslauf 119
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5 ABSTRACT The Dead Sea Transform (DST) fault, formed about 20 M.Y. ago is a major structural feature, which demarcates the two tectonic plate boundaries, Arabian and African plates and it remains a stable platform almost since the formation of these plates in the late Proterozoic. The tectonic stability of this region was only recently (20 M.Y. ago) interrupted by the formation of the DST with a left lateral motion of about 107 km. The general strikes of this fault is from N15°E to N20°E and extends from
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0_Contents - Ayman Mohsen A RECEIVER FUNCTION STUDY OF THE...

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