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莱州湾南岸第三陆相层年龄的铀系等时线法（TSD）测定
许博超¹, 于志刚¹, 江雪艳¹, 陈洪涛¹, 姚庆祯¹, 米铁柱²
1.中国海洋大学海洋化学理论与工程技术教育部重点实验室;2.中国海洋大学海洋环境与生态教育部重点实验室

摘要:

于莱州湾南岸ZK32-1钻孔第三陆相层上下边界处选取自生钙质结核，采用样品全溶铀系等时线法（TSD法）测定钙质结核的年龄。测试结果表明，所有等时线上的数据都有很好的线性关系，表明所获得的年龄数据是合理的。通过对样品代表性的讨论，说明所选取的钙质结核的年龄确可代表其所在地层的年龄，从而得出莱州湾南岸第三陆相层的沉积起止时间为72.16 ka B.P.±7.41ka B.P.到45.34 ka B.P.±5.35ka B.P.的结论。本研究首次获得莱州湾南岸地层的铀系TSD年龄，为全面认识该地区晚更新世地层年代学提供了一个新视角。

关键词: 莱州湾南岸第三陆相层钙质结核 TSD法

DOI：

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基金项目:国家自然科学基金资助项目（40276026）

U-series Isochrone method (TSD) dating age of third continental facies at the south coast of Laizhou Bay

Abstract:

In order to know the age of the third continental facies of the south coast of Laizhou Bay, authigenic calcrete nodules existed in the core ZK32-1 were sampled. The nodules existed in the layes and determined by the total-sample-dissolution isochron (TSD) techniques can be represented. The ages are 45.34 ka B.P.±5.35ka B.P. and 72.16 ka B.P.±7.41ka B.P. for the top and base layers of the continental facies respectively. They’re the first TSD data and consistent with previous research.

Key words: south coast of Laizhou Bay third continental facies calcrete nodules Total-sample-dissolution (TSD)

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