P- and S- Receiver Functions Analysis and Joint Inversion: Lithospheric Structure below Erzurum Vicinity

Year 2023, Volume: 44 Issue: 1, 64 - 85, 28.03.2023

Hamdi ALKAN

https://doi.org/10.17824/yerbilimleri.1131197

Abstract

The receiver function technique is frequently used by geophysicists to determine discontinuities and to suppose the layer thicknesses in the crust and upper mantle. A receiver function is a time series in which phases are converted from P to S or S to P. In this study, the time-domain deconvolution method, depth and slowness stack, and the joint inversion algorithm are performed. In the aim of the study, teleseismic data is selected for the recorded at SENK and ECAT stations located in Erzurum city. P- and S-wave velocities, and Vp/Vs ratios are calculated for the lithospheric structure beneath these stations. The results of this study are generally consistent with previous receiver function findings applied in the study region.

Keywords

Receiver Functions, Joint Inversion, Crust and Upper Mantle, Erzurum

P- ve S- Alıcı Fonksiyonları Analizi ve Birleşik Ters Çözümü: Erzurum civarındaki Litosferik Yapı

Abstract

Alıcı fonksiyonu tekniği kabuk ve üst mantodaki tabaka kalınlıklarının varsayımı ve süreksizlikleri belirlemek için Jeofizikçiler tarafından sıklıkla kullanılmaktadır. Bir alıcı fonksiyonu P’den S’ye ya da S’den P’ye dönüşen fazları gösteren bir zaman serisidir. Bu çalışmada, zaman ortamı dekonvolüsyonu, derinlik ve yavaşlık yığma, ve birleşik ters çözüm algoritması uygulanmıştır. Çalışma kapsamında, Erzurum civarında bulunan SENK ve ECAT geniş bantlı deprem istasyonlarının telesismik kayıtları seçilmiştir. Alıcı fonksiyonları yığma işlemine tabii tutulduktan sonra, istasyon altındaki litosferik yapı için P- ve S-dalgası hız modelleri ve Vp/Vs oranları hesaplanmıştır. Bu çalışmadan elde edilen sonuçların, çalışma bölgesinde önceden yapılmış alıcı fonksiyonu sonuçları ile genellikle tutarlı olduğu gözlemlenmiştir.

Keywords

Alıcı Fonksiyonları, Birleşik Ters Çözüm, Erzurum, Kabuk ve Üst Manto Yapısı

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