• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Geologic Problem Solving with Microfossils >THE CONTRIBUTION OF CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHYIN SOLVING GEOLOGICAL PROBLEMS: THE EXAMPLE OF THEOLIGOCENE-MIOCENE FOREDEEP OF THE NORTHERN APENNINES (ITALY)
【24h】

THE CONTRIBUTION OF CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHYIN SOLVING GEOLOGICAL PROBLEMS: THE EXAMPLE OF THEOLIGOCENE-MIOCENE FOREDEEP OF THE NORTHERN APENNINES (ITALY)

机译：钙质Nannofossil BioStratigraphyin解决地质问题的贡献：北亚平诺北部北部北部奥啉 - 中肾上腺素 - 中烯丙烯（意大利）的实例

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the Northern Apennines fold and thrust belt of Italy, the post-collisional stages are characterized by the Oligocene–Pliocene progressive shortening of the foredeep basins, resulting from the eastward migration of the orogenic front toward the belt foreland represented by the Adria plate continental margin. The foredeep deposits were involved in the tectonic stack as thrust sheets detached from their substrate and overthrust by the Ligurian Units derived from the Ligurian–Piedmont oceanic basin. The aim of this paper is to discuss the decisive contribution of the calcareous nannofossil biostratigraphy in the determination of the space–time evolution of the Oligocene–Miocene foredeep basins of the Northern Apennines. We present synthetically the results of the analysis of the nannofossil content of thousands of samples collected in several stratigraphic sections in the foredeep deposits, which are represented by thick sandstone turbidites interposed between shale and marl deposits marking the starting and the closure of the sedimentation. The nannofossil data indicate that the development of the Oligocene–Miocene foredeep is comprised between the Rupelian, the age of the oldest successions, and the lower Messinian of the more external basin. These data also highlight the diachronous evolution of the foredeep basins associated with their eastward migration; in particular, the closure age data show that, starting from the Oligocene, the tectonic activity of the Northern Apennines is arranged in a continuous series of events, during which new basins were successively opened and closed, and that the emplacement of the Ligurian Units over the foredeep basins seems to be an uninterrupted process rather than due to distinct tectonic stages.
机译：在意大利的北赤刃褶皱和推力皮带中，碰撞后阶段的特点是欧洲植物 - 全世界的牛肝盆渐进性缩短，由奥林前面的东部迁移到Adria钢板大陆边缘所代表的皮带前沿。 。作为从其基材分离的推力板和由源自利古里亚 - 皮氏海洋盆地脱离的螺柱单元，觅食沉积物涉及构造堆叠。本文的目的是讨论钙质Nannofossil生物数据图在北赤叶植物寡烯 - 中肾上腺植物盆地的时空演变中的决定性的决定性贡献。我们在综合性上呈现了在祖先沉积物中的若干地层段中收集的数千个样品的NannoFossil含量分析的结果，该沉积物由厚砂岩浊管仪代表，其位于页岩和Marl沉积物之间标记沉降的起始和闭合。 Nannofossil数据表明，牛茂族 - 中肾上腺植物的开发包括在卢比，最古老的继承的年龄和更多外部盆地的下游。这些数据还突出了与东方迁移相关的雕刻盆地的二次模切演变;特别地，关闭年龄数据表明，从寡核苷开始，北亚平线的构造活动在连续的一系列事件中排列，在此期间，新的盆地连续开启和关闭，并且利普里安单位的施加结束雕侧盆地似乎是不间断的过程，而不是由于不同的构造阶段。

著录项

相似文献

  • 外文文献
  • 中文文献
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