...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Foredeep geometries at the front of the Apennines in the Ionian Sea (central Mediterranean)
【24h】

Foredeep geometries at the front of the Apennines in the Ionian Sea (central Mediterranean)

机译：爱奥尼亚海（地中海中部）亚平宁山脉前部的前缘几何

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

A new regional seismic section in the Ionian Sea across the Apennines belt and related foreland shows how the present foredeep geometry may be an example for interpreting discontinuous, tilted and deformed earlier basins now incorporated in the internal parts of the accretionary wedge. Onlap stratal terminations of the foredeep sediments on the foreland monocline may simulate downlap geometries once involved and tilted by back-thrusting. The geometry of the Ionian foredeep is controlled by the dip of the regional monocline, and internally by the variable dip and length of the limb of the external fold, which may be either foreland-verging or hinterland-verging. The generation of a new fold within the foredeep splits the basin into a new foredeep toward the foreland and a thrust-top basin toward the hinterland. The thrust-top basin dimension is primarily controlled by the distance between the two folds and related thrusts at its margins. The foredeep, in its overall history, is composed by a series of concave heterogeneous lenses, progressively displaced and piled up toward the foreland to the east. The formation of each sedimentary lens is controlled by the development of a new fold and the contemporaneous retreat of the regional monocline which creates new accommodation space. The complex 3D geometry of the Apennines foredeep mainly results from lateral variations of the latter parameters, as well as variations in sediment supply and eustasy.
机译：爱奥尼亚海横跨亚平宁山脉带和相关前陆的一个新的区域地震剖面显示了当前的前深几何形状可能是一个解释不连续，倾斜和变形的早期盆地的例子，这些盆地现在已纳入增生楔的内部。前陆单峰线上前深层沉积物的上覆层终止可能会模拟下覆层的几何形状，一旦涉及并因反冲而倾斜。爱奥尼亚山前缘的几何形状由区域单斜线的倾角控制，内部由外部褶皱的可变倾角和肢体长度控制，这可以是前陆边缘或腹地边缘。在前缘内产生新的褶皱，将盆地分成朝前陆的新前缘和朝内陆的逆冲顶盆地。顶推盆地的尺寸主要由两个褶皱之间的距离和其边缘的相关推力控制。在整个历史中，前坡由一系列凹形异质透镜组成，这些透镜逐渐位移并向东朝前陆堆积。每个沉积晶状体的形成都受到新褶皱的发展和区域单斜线同时撤退的控制，从而形成了新的容纳空间。亚平宁山脉前缘的复杂3D几何形状主要是由后一个参数的横向变化以及沉积物供应和摇头丸的变化引起的。

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