A recent tectonic reorganization in the south-central Mediterranean
A recent tectonic reorganization in the south-central Mediterranean
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DOI：
10.1016/j.epsl.2004.07.038
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发表时间：
2004-10-15
影响因子：
5.3
通讯作者：
Geiger, A
中科院分区：
文献类型：
--
作者：
Goes, S;Giardini, D;Geiger, A
新的大地测量数据与地震活动、地质和地球化学信息相结合，记录了地中海中部在 0.8-0.5 Ma 左右发生的一次重大构造重组，当时快速的海沟迁移和随之而来的第勒尼安背拉延伸主导了该地区自托尔托阶 (10-8 Ma) 基本停止以来的演化。作为回应，非洲在西西里岛的聚合转向了南第勒尼安的逆冲，其特点是过去20年频繁发生M5-6地震。横跨西西里岛东北部形成的弥散变换边界连接了西西里板块和卡拉布里亚板块边界，导致墨西拿海峡（历史上大地震的发源地）的开放，以及伊奥利亚岛弧和板内埃特纳火山的异常火山活动。爱奥尼亚地区与非洲主要部分的分歧，向东北方向的运动反映了非洲推力和希腊板块拉力的共同影响，并传递到卡拉布里亚和阿德里亚，这可以解释在西西里海峡、卡拉布里亚和普利亚观察到的运动，以及西西里岛东南部地震活动的高水平。 (C) 2004 Elsevier B.V. 保留所有权利。
New geodetic data combined with seismicity, geologic and geochemical information document a major tectonic reorganization in the central Mediterranean around 0.8-0.5 Ma, when rapid trench migration and consequent Tyrrhenian back-are extension which dominated the region's evolution since the Tortonian (10-8 Ma) essentially stopped. In response, the African convergence in Sicily was transferred to a back-thrust in the Southern Tyrrhenian, characterized by frequent M5-6 earthquakes in the last 20 years. A diffuse transform boundary formed across northeastern Sicily to connect the Sicilian and Calabrian plate boundaries, causing opening of the Messina Straits-home to large historical earthquakes-and unusual volcanism in the Aeolian Island arc and the intraplate Mount Etna. A divergence of the Ionian region from the main part of Africa, with northeast-ward motions that reflect the joint influence of African push and Hellenic slab pull, and are transmitted to Calabria and Adria, could explain motions observed in the Sicily Channel, Calabria and Apulia, as well as the high level of southeastern Sicilian seismic activity. (C) 2004 Elsevier B.V. All rights reserved.