...
  • 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 >~(40)Ar/~(39)Ar dating of a Langhian biotite-rich clay layer in the pelagic sequence of the Conero Riviera, Ancona, Italy
【24h】

~(40)Ar/~(39)Ar dating of a Langhian biotite-rich clay layer in the pelagic sequence of the Conero Riviera, Ancona, Italy

机译：意大利安科纳Conero Riviera浮游层序中的Langhian黑云母富含粘土层的〜（40）Ar /〜（39）Ar测年

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 nearly complete and undisturbed Miocene carbonate sequence is present in the easternmost part of the Umbria-Marche basin, Italy, which is ideal for detailed and integrated stratigraphic investigations of the Miocene Epoch. In this study, we were trying to obtain evidence for the presence or absence of distal ejecta from the 15 Ma Ries impact structure in southern Germany, located about 600 km to the north-northwest of the Umbria-Marche basin. The first step is to find coeval strata in the Umbria-Marche sequence. At the La Vedova section, Conero Riviera, we dated a volcaniclastic biotite-rich clay layer, the Aldo Level, which is situated within planktonic foraminiferal Zone N8, at 14.9 ± 0.2 Ma, using the ~(40)Ar/~(39)Ar method. Together with detailed geologic and stratigraphic information about the Aldo Level, the resulting age can be used confidentially to calibrate the Langhian stage. Besides providing new constraints on Miocene geochronology, this age can now be used for impact stratigraphic studies. To directly correlate the biotite ages of the La Vedova section with rocks from the Ries impact event, Ries impact glass was also analyzed and found to be coeval. Although unrelated to this impact event, the biotite-rich clay layer should help in the search for evidence of distal ejecta related to the Ries crater.
机译：在意大利翁布里亚-马尔什盆地的最东端，存在一个近乎完整且不受干扰的中新世碳酸盐岩层序，这是中新世纪元的详细和综合地层研究的理想选择。在这项研究中，我们试图从位于德国南部翁布里亚-马什盆地西北约600公里处的15 Ma Ries撞击结构中获得远侧顶出的证据。第一步是在翁布里亚-马尔什层序中找到中世纪的地层。在Conero Riviera的La Vedova部分，我们用〜（40）Ar /〜（39）测得了一个火山碎屑丰富的黑云母粘土层Aldo层，该层位于14.9±0.2 Ma的浮游有孔虫区N8内。 Ar方法。连同有关Aldo级别的详细地质和地层信息，可以将得出的年龄秘密用于校准Langhian阶段。除了提供对中新世年代学的新限制外，现在可以将该年龄用于影响地层研究。为了将La Vedova剖面的黑云母年龄与来自Ries撞击事件的岩石直接相关，还对Ries撞击玻璃进行了分析，发现是相同的。尽管与这种撞击事件无关，但富含黑云母的粘土层应有助于寻找与里斯火山口有关的远侧射出的证据。

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