Morphological Features of Major Submarine Landslides of Marmara Sea Using Multibeam Data
Morphological Features of Major Submarine Landslides of Marmara Sea Using Multibeam Data
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利用多波束数据研究马尔马拉海主要海底滑坡的形态特征
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
E. Doğan
中科院分区：
文献类型：
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作者：
Cem Gazi̇oğlu;Z. Yücel;E. Doğan
近年来的深海测量有助于我们了解马尔马拉海的形态特征。马尔马拉海具有独特而复杂的地貌特征和活动构造。本研究利用先进的可视化和地理信息系统（数字地形模型，DTM，地理信息系统，GIS，图像处理系统，高分辨率地震和测深数据）研究了马尔马拉海主要海底滑坡的形态特征。马尔马拉海的高角度陆坡是由海底滑坡和滑坡形成的，这些滑坡和滑坡有可能引发海啸。本文研究了马尔马拉海构造活动的主要海底滑坡。其中三个在斜坡上，一个在东脊，第五个形成马尔马拉海的西脊。它们被解释为由斜坡和构造活动控制的旋转和平移滑动、泥石流和泥石流。在Çınarcık盆地北坡上，断裂激活的旋转滑动和泥石流影响了该斜坡的当前形状。因此，我们认为马尔马拉海目前的斜坡形态可能不仅受到断层的控制，而且受到滑坡的控制。另一方面，tekirdaak盆地和伊兹米特湾马尔马拉海入口（Çınarcık盆地）的泥石流可能受斜坡倾斜和沉积物供应的控制，而不是构造。东脊的另一次泥石流是由东脊西北侧逆断层对东脊的倾斜引起的，因此，构造活动控制的斜坡倾斜影响了这次滑坡的发生。马尔马拉海最大的山体滑坡之一形成了西脊作为平移滑动。它最初的形状已经被北安那托利亚断裂带的新破裂所破坏，因此，它可能是马尔马拉海最古老的海底滑坡之一。
Abstract Recent bathymetric surveys help us to understand morphological features of the Marmara Sea. Marmara Sea has unique and complex morphological features and active tectonics. In this study, morphologic features of major submarine landslides of the Marmara Sea were studied using advanced visualization and geomatic systems (digital terrain models, DTM; geographic-information systems, GIS; image-processing systems; high-resolution seismic and bathymetric data). The high-angle continental slopes of the Marmara Sea are produced by submarine landslides and slumps, which have potential tsunamis generations. In this study, tectonically active major submarine landslides were investigated in the Marmara Sea. Three of them are observed along the slopes, one is on the Eastern Ridge and the fifth forms the Western Ridge of the Marmara Sea. They are interpreted as rotational and translational slides, debris flows, and mudflows controlled by slope and tectonic activity. On the northern slope of Çınarcık Basin, rotational slide and debris flows, which are activated by faults, affect the current shape of this slope. Hence, we interpret that the present morphology of the slopes of the Marmara Sea may not be only controlled by faults but also the landslides. On the other hand, mudflows in Tekirdağ Basin and in the Marmara Sea entrance of Izmit Bay (Çınarcık Basin) may be controlled by slope inclination and sediment supply rather than tectonics. Another mudflow on the Eastern Ridge initiated by the inclination of the ridge by a reverse fault in the northwest side of the ridge, thus, slope inclination controlled by tectonic activity affects the origination of this landslide. One of the largest landslides in the Marmara Sea forms the Western Ridge as a translational slide. Its initial shape has been destroyed by the new rupture of the North Anatolian Fault Zone, thus, it may be one of the oldest submarine landslides of the Marmara Sea.