首页> 外文期刊>Quaternary geochronology >Calibration of the production rate of cosmogenic Cl-36 from Fe
【24h】

Calibration of the production rate of cosmogenic Cl-36 from Fe

机译:校准Fe的宇宙中CL-36的生产率

获取原文
获取原文并翻译 | 示例
           

摘要

We present a new calibration of the in-situ production rate of cosmogenic Cl-36 from Fe with the aim of enabling the use of Fe-oxides and other Fe-rich minerals as Cl-36 target materials. The calibration was conducted using magnetite mineral separates from rocks with well-constrained exposure histories, including late-Pleistocene glacial erratic boulders from the Sierra Nevada, California, USA and samples from a slowly eroding ridgetop in the Quadrilatero Ferrifero, Minas Gerais, Brazil. At both sites the Cl-36 production rate from Fe was calibrated against the production rate of Be-10 in co-occurring quartz, while in the Sierra Nevada the calibration was also conducted against C-14-based deglaciation ages. The data produce a mean Cl-36(Fe) to Be-10(QtZ) production ratio of 0.417 +/- 0.010 at the calibration sites. This ratio may depend on altitude and latitude. A reaction-specific scaling model predicts that the calibrated ratio scales to a reference value at sea level and high latitude of 0.326 +/- 0.008. When considering uncertainties in reference Be-10 production rate, this is equivalent to a sea level and high latitude production rate of 1.28 +/- 0.11 atoms g Fe-1 yr(-1). Additional data are needed to confirm the scaling behavior.
机译:我们提出了来自Fe的宇宙原位生产率的新校准,其目的是使Fe氧化物和其他Fe富含Fe的富含Fe的矿物作为Cl-36靶材料。使用磁铁矿矿物质与岩石分离进行校准,该矿物分离有受到良好的曝光历史,包括来自塞拉涅地纳达,加利福尼亚州内华达州的山脉内华达州,加利福尼亚州,美国和普通队的普通队,Minas Gerais,Minas Gerais,Minas Gerais,Blazil。在这两个地点,在共同发生的石英中,CL-36来自FE的生产率校准了BE-10的生产率,而在塞拉纳地区,也对基于C-14的下降症进行了校准。该数据在校准点处产生0.417 +/- 0.010的平均Cl-36(Fe)至-10(QTZ)的生产比率。该比率可能取决于高度和纬度。特定于反应的缩放模型预测校准比率在海平面的参考值和0.326 +/- 0.008的高纬度。在考虑参考的不确定性BE-10生产率时,这相当于海平面和高纬度生产率为1.28 +/- 0.11原子G Fe-1 Yr(-1)。需要其他数据来确认缩放行为。

著录项

  • 来源
    《Quaternary geochronology》 |2019年第2019期|共12页
  • 作者单位

    Dept Earth Atmospher &

    Planetary Sci 550 Stadium Mall Dr W Lafayette IN 47907 USA;

    Dept Earth Atmospher &

    Planetary Sci 550 Stadium Mall Dr W Lafayette IN 47907 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 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