...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of geodynamics >Early-stage rifting of the Southern Tyrrhenian region: The Calabria-Sardinia breakup
【24h】

Early-stage rifting of the Southern Tyrrhenian region: The Calabria-Sardinia breakup

机译：第勒尼安南部地区的早期裂谷：卡拉布里亚-撒丁岛分裂

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Southern Tyrrhenian Sea is an extensional basins linked to the Neogene evolution of the Calabria subduction zone located in the western Mediterranean realm where controversial kinematic and geody-namical models have been proposed. Our study provides a key to unravel timing and mode of extension of the upper plate and the breakup of Calabria from Sardinia. By combining original stratigraphic analysis of wells and seismic profiles off Calabria with a stratigraphic correlation to onshore outcrops, we re-assess the tectonic evolution that controlled the sedimentation and basement deformation of the Southern Tyrrhenian basin during Serravallian-Tortonian times. We document the tectono-stratigraphic evolution of adjacent extensional basins characterized by 3rd order depositional sequences (Ser1, Tor1 and Tor2) and different modes of extension, subsidence and opposite dipping faults. Episodic basin development is recorded by a coarsening-up and fining-up trend of the sedimentary succession and by tectonically enhanced unconformities that reflect three episodes of fault activity. We reconstruct Serravallian-Tortonian paleogeographic maps and propose a block faulting model for the evolution of the Sardinia-Calabria area. Sardinia was disconnected from Calabria through N-S normal faults forming Tyrrhenian extensional basins that formed contemporaneously to the E-W opening of the Algerian basin. Unlike published Serravallian-Tortonian reconstructions of the western Mediterranean realm, our results support a geodynamic model characterized by rapid trench retreat, trench-normal extension in the entire overriding plate and very weak coupling between plates.
机译：第勒尼安海南部是延伸的盆地，与位于地中海西部的卡拉布里亚俯冲带的新近纪演化有关，那里已经提出了有争议的运动学和大地动力学模型。我们的研究提供了揭开上板延伸的时间和方式以及撒丁岛的卡拉布里亚破裂的关键。通过结合卡拉布里亚的井和地震剖面的原始地层分析以及与陆上露头的地层相关性，我们重新评估了控制塞拉瓦利安-托通时期南第勒尼安盆地沉积和基底变形的构造演化。我们记录了以三阶沉积层序（Ser1，Tor1和Tor2）为特征的相邻伸展盆地的构造-地层演化以及不同的伸展，下陷和相对的俯冲断层模式。通过沉积演替的粗化和精细化趋势以及反映断层活动的三事件的构造上增强的不整合面来记录盆地的间歇性发育。我们重建塞拉瓦利亚-托尔托尼古地理图，并为撒丁岛-卡拉布里亚地区的演化提出了块状断层模型。撒丁岛通过N-S正常断层与卡拉布里亚断开连接，形成了第勒尼期伸展盆地，该时期与阿尔及利亚盆地E-W口同时形成。与已发布的西地中海地区的塞拉瓦利亚-托顿式重建不同，我们的结果支持一种地球动力学模型，其特征是快速后撤，整个上覆板块的法线延伸以及板块之间的耦合非常弱。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号