Mud volcanoes along the inner deformation front of the Calabrian Arc accretionary wedge (Ionian Sea)

被引:21
作者
Panieri, G. [1 ]
Polonia, A. [1 ]
Lucchi, R. G. [2 ]
Zironi, S. [3 ]
Capotondi, L. [1 ]
Negri, A. [4 ]
Torelli, L. [5 ]
机构
[1] ISMAR CNR, Bologna, Italy
[2] Ist Nazl Oceanog & Geofis Sperimentale OGS, Trieste, Italy
[3] Univ Bologna, Dipartimento Sci Terra & Geol Ambientale, I-40126 Bologna, Italy
[4] Univ Politecn Marche, Dipartimento Sci Vita & Ambiente, Ancona, Italy
[5] Univ Parma, Dipartimento Sci Terra, I-43100 Parma, Italy
关键词
Mud volcano; Massive mud breccia; Patchy/cloudy mud breccia; Fluid emission; Accretionary wedge; Calabrian Arc; Mediterranean Sea; EASTERN MEDITERRANEAN-SEA; GULF-OF-MEXICO; WESTERN WASHINGTON-STATE; SEISMIC-REFLECTION; LATE QUATERNARY; BLACK-SEA; GEOLOGICAL EVIDENCE; CONTINENTAL-MARGIN; BRECCIA CLASTS; FIELD SEAWARD;
D O I
10.1016/j.margeo.2012.11.003
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We present geophysical data integrated with the analysis of well-targeted sediment samples in order to contribute to a better understanding of fluid circulation in the Calabrian Arc accretionary wedge. Two cores (BS81/II 5 and BS81/II 10) collected on a swell in the hangingwall of the inner deformation front show upper Pleistocene mud breccias that include Cretaceous to Late Miocene rock fragments mechanically incorporated into the eruption deposit by the upward transport of overpressured fluids. An additional core (CALA 21) came from the summit of a topographic high in the footwall of the inner deformation front of the accretionary wedge and contains a mud breccia patchy/cloudy facies where sediment disturbance is caused by fluid expulsion. Integration of the entire data set provides evidences of the interplay among tectonics, fluid emissions and sedimentation, and enables the identification of two new volcanoes in the accretionary prism where overpressuring due to Pliocene and Pleistocene sediment accumulation and the evolution of active fault systems triggered fluid circulation and the formation of those structures. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:84 / 98
页数:15
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