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南极格罗夫山地表岩石样品中宇宙成因^(21)Ne的含量及暴露年龄 被引量：2

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摘要 地表岩石中21Ne和22Ne有多种来源:宇宙成因、原位放射性成因、捕获的地壳源放射性成因和捕获的微量大气.本研究报道了首次在中国开展的对地表石英中宇宙成因21Ne和22Ne的测定工作.我们采用了一个独创的样品前处理方法,有效地去除了石英中的包体,最大限度地减少了放射性成因21Ne和22Ne的贡献.多阶段加热结果表明南极格罗夫山地区哈丁山地表岩石样品R9202和R9203中宇宙成因21Ne和22Ne的含量分别为(3.83±0.87)×108和(5.22±0.51)×108atom·g-1,其相应的最小暴露年龄为(2.2±0.5)和(3.0±0.3)Ma,表明哈丁山顶的暴露至少从上新世中期就已开始.
作者 孔屏 丁林 来庆州 黄费新
机构地区 中国科学院地质与地球物理研究所地球深部研究重点实验室 中国科学院青藏高原研究所大陆碰撞与高原隆升重点实验室 中国冶金地质总局矿产资源研究院
出处 《中国科学（D辑）》 CSCD 北大核心 2010年第1期45-49,共5页 Science in China(Series D）
基金 国家自然科学基金(批准号:40631004)资助
关键词 ^21Ne 宇宙成因核素 暴露年龄 南极 格罗夫山
分类号 P584 [天文地球—岩石学]
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参考文献19

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同被引文献41

  • 1方爱民,刘小汉,王伟铭,俞良军,李潇丽,黄费新.东南极格罗夫山地区新生代冰碛岩(物)中孢粉的发现及其意义[J].第四纪研究,2004,24(6):645-653. 被引量：6
  • 2陈文寄,计凤桔,王非.年轻地质体系的年代测定(续)-新方法、新进展.北京:地震出版社,1999:77-100.
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  • 4Balco G, Shuster D. Production rate of cosmogenic 21Ne in quartz estimated from ^10Be, ^26A1, and ^21Ne concentrations in slowly eroding Antarctic bedrock surfaces. Earth Planet Sci Lett, 2009, 281:48-58.
  • 5Goethals M. Determining the impact of faulting on the rate of erosion in a low-relief landscape: A case study using in situ produced ^21Ne on active normal faults in the Bishop Tuff Cslifornia. Earth Planet Sci Lett, 2009, 103:401-413.
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  • 8Niedermann S. Cosmic-ray-produced noble gases in terrestrial rocks: Dating tools for surface processes. Rev Mineral Geochem, 2002, 47:731-784.
  • 9Fenton C, Niedermann S, Goethals M, et al. Evaluation of cosmogenic ^3He and ^21Ne production rates in olivine and pyroxene from two Pleistocene basalt flows, western Grand Canyon, AZ, USA. Quat Geochronol, 2009, 4:475-492.
  • 10Amidon W, Farley K. Cosmogenic ^3He and ^21Ne dating of biotite and hornblende. Earth Planet Sci Lett, 2012, 313-314:86-94.

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中国科学（D辑）
2010年 第1期

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