...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Volcanology and Geothermal Research >Chlorine degassing constrained by cosmogenic ~(36)C1 and radiocarbon dating of early Holocene rhyodacitic lava domes on Erciyes stratovolcano, central Turkey
【24h】

Chlorine degassing constrained by cosmogenic ~(36)C1 and radiocarbon dating of early Holocene rhyodacitic lava domes on Erciyes stratovolcano, central Turkey

机译：土耳其中部Erciyes stratovolcano上全新世的流纹岩熔岩穹顶的成因〜（36）C1和放射性碳测年所限制的氯气脱气

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 Erciyes stratovolcano in central Turkey has several young rhyodacite lava domes that show evidence of clear exposure histories but have hitherto unknown ages. We collected 27 surface samples from three volcanic domes namely Karagullu, Perikartin and Dikkartin for cosmogenic Cl-36 dating. The Perikartin eruption generated a pyroclastic flow, which buried trees that were converted to charcoal. The radiocarbon (C-14) dating yielded an average age of 9728 +/- 110 cal. years B.P. (calibrated using Calib 7.1). We analyzed the cosmogenic Cl-36 ages, however, were found that they were probably affected by Cl degassing of the magma. Our study suggests that the radiocarbon age indeed lies between the 0% Cl degassing (6.8 +/- 0.5 ka, under nucleogenic Cl-36 equilibrium) and the 100% degassing conditions (9.9 +/- 0.6 ka, under nucleogenic Cl-36 disequilibrium), which implies a partial Cl degassing (93%) during the eruption. This value is somewhat higher than earlier estimates and the difference may result from the miscalculated nucleogenic and/or low-energy neutron production of Cl-36, uncertainties arising from the corrections due to hydrogen-rich cover (i.e., snow) of lava surfaces or due to unconsidered geological complications. Our findings provide a novel approach to estimate the Cl degassing on young lavas and deliver a new evidence of the Holocene volcano-chronology of the central Anatolia. (C) 2018 Elsevier B.V. All rights reserved.
机译：土耳其中部的Erciyes层状火山有几个年轻的流纹岩熔岩穹顶，显示出清晰的暴露历史证据，但迄今未知。我们从三个火山圆顶即Karagullu，Perikartin和Dikkartin收集了27个地表样品，用于宇宙性Cl-36测年。佩里卡汀喷发产生了火山碎屑流，掩埋了树木并转化为木炭。放射性碳（C-14）测年的平均年龄为9728 +/- 110 cal。公元前几年（使用Calib 7.1校准）。我们分析了宇宙成因的Cl-36年龄，但是发现它们可能受到岩浆的Cl脱气的影响。我们的研究表明，放射性碳年龄确实介于0％Cl脱气（在成核的Cl-36平衡下为6.8 +/- 0.5 ka）和100％脱气条件（在成核的Cl-36失衡下为9.9 +/- 0.6 ka）之间），这意味着在喷发过程中会有部分Cl脱气（93％）。该值比先前的估计值稍高，并且差异可能是由于Cl-36的核生和/或低能中子产生的计算错误，熔岩表面富含氢的覆盖层（例如雪）或由于未考虑的地质并发症。我们的发现提供了一种新颖的方法来估算年轻熔岩上的Cl脱气，并为安那托利亚中部的全新世火山年代学提供了新的证据。 （C）2018 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
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