Mud volcanoes along the inner deformation front of the Calabrian Arc accretionary wedge (Ionian Sea)
Mud volcanoes along the inner deformation front of the Calabrian Arc accretionary wedge (Ionian Sea)
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DOI：
10.1016/j.margeo.2012.11.003
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发表时间：
2013-02
期刊：
影响因子：
2.9
通讯作者：
G. Panieri;A. Polonia;R. Lucchi;S. Zironi;L. Capotondi;A. Negri;L. Torelli
中科院分区：
文献类型：
--
作者：
G. Panieri;A. Polonia;R. Lucchi;S. Zironi;L. Capotondi;A. Negri;L. Torelli
为了更好地理解卡拉布里亚弧增生楔的流体循环，我们将地球物理数据与目标明确的沉积物样本分析相结合。BS81/II 5和BS81/II 10岩心采集于内变形前缘上盘隆起处，显示出上更新世泥角砾岩，包括白垩纪至晚中新世的岩石碎屑，通过超压流体的向上输送，机械地整合到喷发沉积中。另一个岩心（CALA 21）来自于增生楔内部变形前缘下盘的地形高点，包含泥角砾岩斑片状/云状相，其中流体排出引起沉积物扰动。整个数据集的整合提供了构造、流体排放和沉积之间相互作用的证据，并能够在增生棱镜中识别出两个新的火山，其中上新世和更新世沉积物积聚造成的超压和活动断裂系统的演化引发了流体循环和这些构造的形成。
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.