• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >U and Th zonation in Fish Canyon Tuff zircons: Implications for a zircon (U-Th)/He standard
【2h】

U and Th zonation in Fish Canyon Tuff zircons: Implications for a zircon (U-Th)/He standard

机译：Fish Canyon Tuff zircons中的U和Th分区：对锆石（U-Th）/ He标准的影响

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The inability to accurately determine the distribution of U and Th in zircon crystals analysed using (U-Th)/He is a major source of error, and limits the confidence in subsequent data interpretation. The Fish Canyon Tuff (FCT) zircon standard shows (U-Th)/He age reproducibility in excess of ±10%. We have tested the extent to which this is due to U and Th zonation using a combination of cathodoluminescence and ion probe analysis of a population of FCT zircons. Primarily we find that FCT zircons exhibit extreme U and Th zonation, and the population has large inter-crystalline variability. Furthermore, the net cathodoluminescence intensity from the FCT zircons is negatively correlated with U and Th concentration, allowing cathodoluminescence emission to be used as a proxy for U and Th zonation. This correlation was exploited to constrain the U and Th zonation within the crystal population, and to show that the poor age reproducibility of the FCT zircons is consistent with the observed zonation. © 2008 Elsevier Ltd. All rights reserved.
机译：无法准确确定使用（U-Th）/ He分析的锆石晶体中U和Th的分布是主要的误差来源，并限制了后续数据解释的可信度。鱼峡谷凝灰岩（FCT）锆石标准显示（U-Th）/ He年龄再现性超过±10％。我们使用阴极荧光和结合了FCT锆石的离子探针分析，测试了这归因于U和Th分区的程度。首先，我们发现FCT锆石显示出极高的U和Th带，并且该族群具有较大的晶间变异性。此外，来自FCT锆石的净阴极发光强度与U和Th浓度呈负相关，从而使阴极发光发射可用作U和Th分区的代理。利用这种相关性将U和Th区域限制在晶体种群中，并显示FCT锆石的较差的年龄再现性与观察到的区域一致。 ©2008 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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