冰碛垄表面碎屑物质宇生核素暴露测年可行性研究

发布时间：2018-05-14 08:36

本文选题：宇生核素 + ~()Be和~()Al(Be-和Al-)暴露测年　；参考：《地质论评》2017年06期

【摘要】：原地生宇宙成因核素(宇生核素)~(10)Be和~(26)Al暴露测年技术已广泛应用于各种地貌年代测定,尤其是在冰川地貌年代测定中备受青睐。多数学者通常选择冰碛垄表面散布的冰川漂砾作为测年对象。然而,冰川漂砾在暴露测年研究中存在暴露后期翻转、不等时暴露等问题,不仅影响冰川地貌测年的精度,而且难以获得较老的冰川地貌年代。冰碛垄表面碎屑物质,一直附着于冰碛垄"表面",可以规避冰川漂砾测年存在的不等时暴露问题,而且可以减少测试样本量、降低测试费用。因此,本文尝试探讨利用冰碛垄表面碎屑物质进行暴露测年研究的可行性,可望为较老冰川地貌暴露测年研究提供新的思路。
[Abstract]:In situ cosmic radionuclide exposure dating techniques have been widely used in various geomorphological dating, especially in glacial geomorphology dating. Most scholars usually choose glacial drift gravel scattered on the surface of moraine ridge as the target of dating. However, in the study of glacial drift, there are some problems, such as late exposure reversal and unequal exposure, which not only affect the accuracy of glacial geomorphology dating, but also make it difficult to obtain the older glacial geomorphological age. The debris material on the surface of the moraine ridge is attached to the "surface" of the moraine ridge all the time, which can avoid the problem of exposure to the glacial drift age, reduce the sample size and reduce the cost of the test. Therefore, this paper attempts to explore the feasibility of using debris materials on the surface of moraine ridges to study exposure dating, which is expected to provide a new idea for the study of exposure dating of older glacial landforms.
【作者单位】：南京师范大学地理科学学院;虚拟地理环境教育部重点实验室(南京师范大学);江苏省地理环境演化国家重点实验室培育建设点;江苏省地理信息资源开发与利用协同创新中心;中国科学院西北生态环境资源研究院冰冻圈国家重点实验室;
【基金】：国家自然科学基金资助项目(编号:41503054) 中国博士后科学基金面上资助项目(编号:2015M582728) 江苏省高校优势学科建设工程资助项目(编号:164320H116)的成果~~
【分类号】：P597.3

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