CRUSTAL VELOCITY STRUCTURE OF BINALUD REGION USING TELESEISMIC P WAVE RECEIVER FUNCTIONS

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NOWROUZI G.R.; PRIESTLEY K.F.; GHAFOURY ASHTIANYA M.; DOLOEIA G.J.

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Seminar Paper

Paper Information

Seminar: IRANIAN GEOPHYSICS CONFERENCE
Year:2006 | Issue:12

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Title

CRUSTAL VELOCITY STRUCTURE OF BINALUD REGION USING TELESEISMIC P WAVE RECEIVER FUNCTIONS

Author(s)

NOWROUZI G.R. | PRIESTLEY K.F. | GHAFOURY ASHTIANYA M. | DOLOEIA G.J.

Keywords

NORTH-EAST OF IRAN

BINALUD

CRUSTAL STRUCTURE

MOHO DISCONTINUITY

RECEIVER FUNCTION

P WAVES

Abstract

THE CRUSTAL STRUCTURE BENEATH THREE SEISMIC STATIONS, DEPLOYED IN TEMPORARY KOPET-DAGH (KD) SEISMIC NETWORK, IN NORTH EASTERN OF IRAN IS DETERMINED USING RECEIVER FUNCTIONS ANALYSIS. IN THIS STUDY, 40 TELESEISMIC EARTHQUAKES THAT WERE RECORDED AT THE STATIONS OF KD NETWORK WERE USED TO CALCULATE RECEIVER FUNCTIONS. BY COMBINING THE RADIAL COMPONENT OF TELESEISMIC P WAVES WITH THE VERTICAL COMPONENT, IT IS POSSIBLE TO IDENTIFY S PHASE WITHIN THE P WAVEFORM. THESE PHASES ARE GENERATED BY THE MECHANISM OF P TO S CONVERSION AT DISCONTINUITIES IN VELOCITY UNDER THE RECEIVING STATION. CRUSTAL STRUCTURE MODELS CAN BE TESTED BY RECEIVER FUNCTIONS GENERATED OF SYNTHETIC SEISMOGRAMS AND COMPARING WITH THE OBSERVED DATA. A COMPLICATED CRUSTAL STRUCTURE IS SUGGESTED FOR THE BINALUD, WITH A MOHO DEPTH OF 52±1 KM THE RESULTS ARE PRESENTING THE THREE MAIN LAYERS: THE UPPER CRUST HAS A S WAVE VELOCITY BETWEEN 2.6–3.6 KM/S AND A 13±1 KM THICKNESS. THE MIDDLE CRUST HAS S WAVE VELOCITY BETWEEN 3.2– 3.9 KM/S AND A 21±1 KM THICKNESS. THE LOWER CRUST HAS S WAVE VELOCITY BETWEEN 3.6 – 4.6 KM/S AND A 18±1KM THICKNESS. THE UPPER CRUST IS DIVIDED TO TWO PARTS. TOP LAYER HAS A POSITIVE SHEAR WAVE VELOCITY GRADIENT FROM 2.6- 3.6 KM/S FROM SURFACE TO A DEPTH OF 7±1 AND BOTTOM LAYER HAS A NEGATIVE SHEAR WAVE VELOCITY GRADIENT FROM 3.6- 3.2 KM/S AND 5KM THICKNESS. THE MIDDLE CRUST ALSO IS DIVIDED TO TWO PARTS. TOP LAYER OF MIDDLE CRUST HAS 9±1 KM THICKNESS AND A 3.2-3.3 KM/S SHEAR WAVE VELOCITY. BOTTOM LAYER OF MIDDLE CRUST HAS 12±1 KM THICKNESS AND 3.4-3.9 KM/S SHEAR WAVE VELOCITY. A S WAVE VELOCITY BETWEEN 4.6– 4.7 KM/S INDICATES THE LOWER CRUST WITH MOHO AT 52±1 KM.

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APA: Copy

NOWROUZI, G.R., PRIESTLEY, K.F., GHAFOURY ASHTIANYA, M., & DOLOEIA, G.J.. (2006). CRUSTAL VELOCITY STRUCTURE OF BINALUD REGION USING TELESEISMIC P WAVE RECEIVER FUNCTIONS. IRANIAN GEOPHYSICS CONFERENCE. SID. https://sid.ir/paper/906531/en

Vancouver: Copy

NOWROUZI G.R., PRIESTLEY K.F., GHAFOURY ASHTIANYA M., DOLOEIA G.J.. CRUSTAL VELOCITY STRUCTURE OF BINALUD REGION USING TELESEISMIC P WAVE RECEIVER FUNCTIONS. 2006. Available from: https://sid.ir/paper/906531/en

IEEE: Copy

G.R. NOWROUZI, K.F. PRIESTLEY, M. GHAFOURY ASHTIANYA, and G.J. DOLOEIA, “CRUSTAL VELOCITY STRUCTURE OF BINALUD REGION USING TELESEISMIC P WAVE RECEIVER FUNCTIONS,” presented at the IRANIAN GEOPHYSICS CONFERENCE. 2006, [Online]. Available: https://sid.ir/paper/906531/en

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