Tectonics of the Marmara Sea region of Turkey: new evidence from micro-earthquake fault plane solutions
Tectonics of the Marmara Sea region of Turkey: new evidence from micro-earthquake fault plane solutions
复制标题
土耳其马尔马拉海地区的构造：来自微地震断层解决方案的新证据
DOI：
10.1111/j.1365-246x.1985.tb05155.x
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发表时间：
1985
影响因子：
2.8
通讯作者：
S. Üçer
中科院分区：
文献类型：
--
作者：
R. Evans;Isa Asudeh;S. Crampin;S. Üçer
总结。马尔马拉海伊兹米特湾地区微震的复合和单事件断层面解表明，北安纳托利亚断裂的这一伸展部分存在右旋走滑运动和张力。这一解释与马尔马拉海地震划线上较大地震的远震确定的断层面解是一致的。从地震活动和地震机制推断的土耳其西北部的微板块几何形状表明，该地区由两个不同变形方式的地震构造单元组成。安纳托利亚南部和中西部的(Anatolid)结构正在经历重大伸展，而马尔马拉海地区(Pontid)的(Pontid)结构正在被剪切，导致走滑和伸展断裂的混合体制。
Summary. Composite and single-event fault plane solutions for microearthquakes in the Izmit Bay area of the Marmara Sea indicate right-lateral strike-slip motion and tension on this extension of the North Anatolian Fault. This interpretation is consistent with teleseismically determined fault-plane solutions obtained for larger earthquakes on the Marmara Sea seismic lineation. Consideration of the microplate geometry of north-western Turkey, inferred from seismicity as well as earthquake mechanisms, suggests that the region comprises two seismotectonic units with differing styles of deformation. The (Anatolid) structures of south- and central-western Anatolia are undergoing major extension, whereas the (Pontid) structures of the Marmara Sea region are being sheared, resulting in a mixed regime of both strike-slip and extensional faulting.