• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Oceanographic Literature Review >Mercury linked to Deccan Traps volcanism, climate change and the end-Cretaceous mass extinction
【24h】

Mercury linked to Deccan Traps volcanism, climate change and the end-Cretaceous mass extinction

机译：汞与Deccan Traps Volcanism相关联，气候变化和最终白垩纪的灭绝

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

Mercury (Hg) anomalies linked to Large Igneous Provinces (LIP) volcanism have been identified in sediments across all five major mass extinctions in Earth's history. This study tests whether Hg in marine sediments is a reliable proxy linking Deccan Traps volcanic eruptions to late Maastrichtian global climate warming and the mass extinction at the Cretaceous-Paleogene boundary (KPB). Our primary test site is the Elles section in Tunisia, the auxiliary Global Stratotype Section and Point (GSSP) to El Kef. Elles has the most complete marine sedimentary record and a high average sedimentation rate of ~4.7 cm/ky. We chose the Hor Hahar section in Israel to corroborate the geographic distribution of Hg fallout from Deccan volcanism. Reliability of the Hg proxy over the last 550 ky of the Maastrichtian to early Da-nian was evaluated based on high-resolution age control (orbital cyclostratigraphy), stable isotope climate record, Hg concentrations, biotic turnover and mass extinction. These results were correlated with the pulsed Deccan eruptive history constrained previously by U-Pb zircon geochronology. Our results support Hg as robust proxy for Deccan volcanism with large Hg spikes marking "extreme event" (EE) pulsed eruptions correlative with climate warming peaks separated by steady, less intense eruptions. Long-term global climate warming began near ~350 ky pre-KPB, reached maximum warming (3-4 °C) between 285 and 200 ky pre-KPB, followed by gradual cooling and rapid temperature drop between 45 and 25 ky pre-KPB. During the last 25 ky before the KPB, multiple Hg EE eruptions correlate with hyperthermal wanning that culminated in the rapid mass extinction at Elles during ≤1000 years of the Cretaceous. These latest Cretaceous Hg peaks may correlate with massive, distal, Deccan-sourced lava flows (＞1000 km long) that traversed the Indian subcontinent and flowed into the Bay of Bengal, bracketing the mass extinction. These results support Deccan volcanism as a primary driver of the end-Cretaceous mass extinction.
机译：与地球历史上所有五大大规模灭绝的沉积物中，与大型火油省（唇）有关的汞（Hg）异常。本研究检测船舶沉积物中的汞是否是可靠的代理将Deccan Traps火山爆发的可靠性代理连接到Maastrichtian全球气候变暖和白垩纪 - 古常界边界（KPB）的质量灭绝。我们的主要测试站点是突尼斯，辅助全球划线部分和点（GSSP）的Elles部分，到El Kef。 elles拥有最完整的海洋沉积记录和高平均沉降率〜4.7厘米/ ky。我们在以色列中选择了Hor Hahar段，以证实CoC​​CAN Volcanism的HG辐射地理分布。基于高分辨率年龄控制（轨道环节术），稳定的同位素气候记录，HG浓度，生物转换和质量灭绝，评估了Maastrichtian的最后550 kthe-Maastrichtian至早期Da-Nian的HG Proxy的可靠性。这些结果与先前由U-Pb锆石地理学的脉冲脱霉突发历史相关。我们的结果支持HG作为Deccan Volcanism具有大型HG峰值的强大代理，标记“极端事件”（EE）脉冲喷发与气候变暖峰之间的相关性，稳定，不太强烈的爆发。长期全球气候变暖开始〜350 KY KPB近350 k，达到285到200 ky kpb之间的最大变暖（3-4°C），然后逐渐冷却，迅速下降45到25 ky-kpb 。在KPB之前的最后25 ky期间，多次Hg ee爆发与高温衰落相关，在≤1000年的白垩纪≤1000年期间，在etells的快速质量灭绝中染色。这些最新的白垩纪HG峰可以与大规模，远端，甲板排水的熔岩流（> 1000公里长）与印度次大肿，并流入孟加拉的湾，支撑群众灭绝。这些结果支持DECCAN VOLCANISIS作为最终白垩纪灭绝的主要驾驶员。

著录项

  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2158-2159|共2页
  • 作者

    G. Keller; P. Mateo; J. Monkenbusch;

  • 作者单位

    Department of Geosciences Princeton University Princeton NJ 08544 United States;

    Department of Geosciences Princeton University Princeton NJ 08544 United States;

    Department of Geosciences Princeton University Princeton NJ 08544 United States;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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