CRONUS-Earth cosmogenic 36Cl calibration
CRONUS-Earth cosmogenic 36Cl calibration
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DOI：
10.1016/j.quageo.2015.10.002
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发表时间：
2016-02-01
影响因子：
2.7
通讯作者：
Gosse, John C.
中科院分区：
文献类型：
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作者：
Marrero, Shasta M.;Phillips, Fred M.;Gosse, John C.
从不同的地质校准研究中获得的氯-36生产率（例如，Evans等人，1997;菲利普斯等人，2001; Schimmelpfennig等人，2011; Stone等人，1996年; Swanson和Caffee，2001年）变化很大，主要是因为许多反应有助于产生这种核素。CRONUS-地球项目提供了高质量的地质校准地点，包括秘鲁的邦纳维尔湖和苏格兰，用于大规模校准Cl-36的生产率。使用Lifton-Sato-Dunai定标（LSDn），使用三个地点校准Cl-36生产的钾和钙离子途径，分别产生Cl-36（g Ca）（-1）年（-1）的56.0 +/- 4.1和Cl-36（g K）（-1）年（-1）的155 +/- 11生产率。低能生产参数P-f（0）分别使用来自Bonneville和Baboon Lakes站点的CRONUS-地球数据进行校准，其中Cl浓度较高，并产生759 +/- 180中子（g空气）（-1）年（-1）的值。由于该反应对环境条件的敏感性，该途径存在显著的不确定性。根据计算年龄与独立二级数据集独立年龄的方差，估计与校准生产参数相关的不确定性。(C)2015爱思唯尔B. V.保留所有权利。
Chlorine-36 production rates obtained from different geological calibration studies (e.g. Evans et al., 1997; Phillips et al., 2001; Schimmelpfennig et al., 2011; Stone et al., 1996; Swanson and Caffee, 2001) vary significantly, principally because of the many reactions contributing to the production of this nuclide. The CRONUS-Earth Project has provided high-quality geological calibration sites, including Lake Bonneville, Peru, and Scotland, for a large-scale calibration of Cl-36 production rates. Three sites were used to calibrate the K and Ca spallation pathways for Cl-36 production yielding production rates of 56.0 +/- 4.1 at Cl-36 (g Ca)(-1) yr(-1) and 155 +/- 11 at Cl-36 (g K)(-1) yr(-1) respectively, using Lifton-Sato-Dunai scaling (LSDn). The low-energy production parameter, P-f(0), was calibrated separately using CRONUS-Earth data from the Bonneville and Baboon Lakes sites where Cl concentrations were higher, and yielded a value of 759 +/- 180 neutrons (g air)(-1) yr(-1). There is significant uncertainty associated with this pathway due to the sensitivity of this reaction to environmental conditions. The uncertainties associated with the calibrated production parameters were estimated based on the variance of calculated ages from independent ages for an independent secondary dataset. (C) 2015 Elsevier B.V. All rights reserved.