Expanding extension, subsidence and lateral segmentation within the Santorini - Amorgos basins during Quaternary: Implications for the 1956 Amorgos events, central - south Aegean Sea, Greece
Expanding extension, subsidence and lateral segmentation within the Santorini - Amorgos basins during Quaternary: Implications for the 1956 Amorgos events, central - south Aegean Sea, Greece
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第四纪圣托里尼-阿莫尔戈斯盆地内的扩张、沉降和横向分割：对 1956 年希腊爱琴海中南部阿莫尔戈斯事件的影响
DOI：
10.1016/j.tecto.2017.10.016
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发表时间：
2018
期刊：
影响因子：
2.9
通讯作者：
D. Lampridou
中科院分区：
文献类型：
--
作者：
P. Nomikou;Christian Hübscher;D. Papanikolaou;G. Farangitakis;M. Ruhnau;D. Lampridou
对基克拉泽斯群岛南部圣托里尼-阿莫尔戈斯构造带的新测深和地震反射数据进行了分析，并对该地区的形态和构造结构进行了描述。Anhydros、Amorgos和Santorini-Angles盆地与中间Anhydros地垒一起被区分在NE-SW向Santorini-Amorgos构造带内，该构造带长60-70 km，宽20-25 km。这些盆地是构造地堑或半地堑，其边界是Santorini-Angles、Amorgos、Ios、Anhydros和Astypalaea的活动边缘正断层。Santorini-Anglesia、Amorgos和Ios边缘断层的下盘朝向西北，阿尔卑斯山基底位于海底陡坎中，上盘朝向东南，第四纪沉积物已沉积，最大厚度为700 m。在Santorini-Anglas和西部Anhydros盆地的地层序列中，已区分出6个沉积单元1-6，而在其余区域，仅沉积了上部4个单元3-6。这表明，在第四纪期间，由于西北-东南方向的持续伸展，盆地扩张并沉降。生长构造的特点是最大变形的不同时期，这是由每个断层附近具有最大厚度的不同沉积单元所指示的。沿圣托里尼-阿摩尔戈斯构造带沿着发现了西北-东南方向的横向构造，并区分了圣托里尼、Anhydros/Kolumbo、Anhydros岛和阿摩尔戈斯的区块/段。沿阿摩尔戈斯断层沿着观察到的最近7-9 m偏移量的陡坡表明，这是在1956年7.5级地震的第一次地震期间激活的，而该地区最近没有发现可能与1956年海啸有关的滑坡。
New bathymetric and seismic reflection data from the Santorini–Amorgos Tectonic Zone in the southern Cyclades have been analysed and a description of the morphology and tectonic structure of the area has been presented. The basins of Anhydros, Amorgos and Santorini–Anafi have been distinguished together with the intermediate Anhydros Horst within the NE-SW oriented Santorini–Amorgos Tectonic Zone which has a length of 60–70 km and a width of 20–25 km. The basins represent tectonic grabens or semi-grabens bordered by the active marginal normal faults of Santorini–Anafi, Amorgos, Ios, Anhydros and Astypalaea. The Santorini–Anafi, Amorgos and Ios marginal faults have their footwall towards the NW where Alpine basement occurs in the submarine scarps and their hangingwall towards the southeast, where the Quaternary sediments have been deposited with maximum thickness of 700 m. Six sedimentary Units 1–6 have been distinguished in the stratigraphic successions of the Santorini–Anafi and the western Anhydros Basin whereas in the rest area only the upper four Units 3–6 have been deposited. This shows the expansion of the basin with subsidence during the Quaternary due to ongoing extension in a northwest-southeast direction. Growth structures are characterized by different periods of maximum deformation as this is indicated by the different sedimentary units with maximum thickness next to each fault. Transverse structures of northwest-southeast direction have been identified along the Santorini–Amorgos Tectonic Zone with distinction of the blocks/segments of Santorini, Anhydros/Kolumbo, Anhydros islet and Amorgos. Recent escarpments with 7–9 m offset observed along the Amorgos Fault indicate that this was activated during the first earthquake of the 7.5 magnitude 1956 events whereas no recent landslide was found in the area that could be related to the 1956 tsunami.
弧后构造作用、火山作用和质量消耗塑造了希腊火山弧圣托里尼-克里斯蒂安娜-阿莫尔戈斯地区的海底形态
影响因子：
2.9
作者：
Hooft, Emilie E.E.;Nomikou, Paraskevi;Toomey, Douglas R.;Lampridou, Danai;Getz, Claire;Christopoulou, Maria-Eleni;O'Hara, Daniel;Arnoux, Gillean M.;Bodmer, Miles;Gray, Melissa
通讯作者：
Gray, Melissa