Kuzey Anadolu Fayı İznik-Gemlik Segmentlerindeki Yerkabuğu Hareketlerinin GNSS Ölçmeleri ile İncelenmesi

Kuzey Anadolu Fayı’nın Marmara bölgesindeki yerbilimcilerin en fazla ilgi gösterdiği bölgelerden birtanesidir. GNSS teknikleri yardımıyla hem fayın kilitlenme derinliği, hem de fayın neden olduğudeformasyon belirlenebilmektedir. Bu çalışmada Kuzey Anadolu Fayı’nın güney kolunda, İznik-Gemlikarasında kalan bölgede, kuzey-güney profili doğrultusunda 8 noktadan oluşan bir ağ oluşturulmuş, 2kampanya gözlem yapılmış ve öncül sonuçlar elde edilerek güncel hız alanı ve gerinim birikimine dairihtimaller değerlendirilmiştir. Elde edilen sonuçlardan, çalışma bölgesinin bir bölümünde uzun yıllardıryapılmakta olan GNSS ölçme değerlerinden elde edilen vektörlerin yönleriyle uyumlu olduğunugörülmüştür. Ayrıca, fay düzlemine dik şekilde tasarlanan profil ölçmelerinin kitlenme derinliği hakkındabilgi vereceği konusunda öncül fikirler edinilmiştir.

Monitoring fault activities by means of geodetic observations on the Iznik and Gemlik segments of the North Anatolian Fault

Marmara segments of the North Anatolian Fault Zone has an attraction region by the geoscientists. Using GNSS techniques allows us to detect not only the locking depth but also the deformation caused by fault movement. In this study, we have set up a network with 8 stations in the Iznik-Gemlik region and made 2 campaign observations in order to evaluate the up-to-date velocity field and strain accumulation through North-south profiles and evaluated the results. From the results obtained, it was observed that vectors obtained from GNSS measurement values, which have been done for a long time in a part of the study area, are compatible with vector directions. In addition, preliminary ideas were obtained that the profile measurements designed as perpendicular to the fault plane would provide information about the depth of fault locking.

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