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Dinaric tectonic features in the Gulf of Trieste (northern Adriatic Sea)

机译:的里雅斯特湾(北亚得里亚海)的二叠纪构造特征

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Seismic investigation in the Gulf of Trieste allows the identification of the extension and activity of the External Dinarides tectonic structures. The Gulf of Trieste belongs to the Adriatic Apulian foreland, consisting of the tilted Paleocene - Mesozoic carbonate platform overlaid by the Eocene foredeep Flysch deposits and by recent Quaternary sediments. The data set consists of 250 km of multichannel seismic profiles, 16 km of high resolution data, collected offshore, and 5 km of multichannel seismic profiles collected onshore since 2003. The main tectonic features identified in the study area are: a) the Trieste fault zone, occurring on the Karst coastal front, up to 2-3 km offshore; it is a Dinaric thrust system with about 1400 m of total vertical displacement in the carbonates, possibly affected by neotectonic activity; b) Dinaric frontal thrusts, present in the Gulf of Trieste and in the southern Friuli Plain, deforming the Flysch sequence and producing low angle faults in the carbonates; c) occurrence of possible NE-SW faults dissecting the Dinaric thrusts.
机译:的里雅斯特湾的地震勘测可以确定外部第纳里德群岛构造构造的扩展和活动。的里雅斯特湾属于亚得里亚海的阿普利亚前陆,由倾斜的古新世-中生界碳酸盐岩台地覆盖,并由始新世前深弗利希矿床和最近的第四纪沉积物覆盖。自2003年以来,该数据集包括250 km的多通道地震剖面,16 km的近海采集高分辨率数据和5 km的陆上采集的多通道地震剖面。该研究区域确定的主要构造特征为:a)的里雅斯特断裂该区域位于喀斯特沿海地区,离岸长达2-3公里;这是一个Dinaric逆冲系统,碳酸盐岩的总垂直位移约为1400 m,可能受到新构造活动的影响; b)在的里雅斯特湾和弗留利平原南部存在的迪纳里克前冲,使弗利希层序变形并在碳酸盐岩中产生低角度断层; c)发生可能的NE-SW断层剖开了Dinaric推力。

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