云南赤土仙人洞石笋黑碳年纹层的发现及其意义

江理渊, 李苗发, 王芳, 刘宏, 蔡炳贵. 云南赤土仙人洞石笋黑碳年纹层的发现及其意义[J]. 第四纪研究, 2023, 43(1): 310-311. doi: 10.11928/j.issn.1001-7410.2023.01.26
引用本文: 江理渊, 李苗发, 王芳, 刘宏, 蔡炳贵. 云南赤土仙人洞石笋黑碳年纹层的发现及其意义[J]. 第四纪研究, 2023, 43(1): 310-311. doi: 10.11928/j.issn.1001-7410.2023.01.26
江理渊, 李苗发, 王芳, 刘宏, 蔡炳贵. 云南赤土仙人洞石笋黑碳年纹层的发现及其意义[J]. 第四纪研究, 2023, 43(1): 310-311. doi: 10.11928/j.issn.1001-7410.2023.01.26 JIANG Liyuan, LI Miaofa, WANG Fang, LIU Hong, CAI Binggui. Discovery and significance of annually black carbon lamina in stalagmite from Chituxianren cave, Yunnan Province[J]. Quaternary Sciences, 2023, 43(1): 310-311. doi: 10.11928/j.issn.1001-7410.2023.01.26
Citation: JIANG Liyuan, LI Miaofa, WANG Fang, LIU Hong, CAI Binggui. Discovery and significance of annually black carbon lamina in stalagmite from Chituxianren cave, Yunnan Province[J]. Quaternary Sciences, 2023, 43(1): 310-311. doi: 10.11928/j.issn.1001-7410.2023.01.26

云南赤土仙人洞石笋黑碳年纹层的发现及其意义

  • 基金项目:

    国家自然科学基金项目(批准号: 42072213和41661144021)和福建师范大学地理科学学院、碳中和未来技术学院研究生科研创新基金共同资助

详细信息

Discovery and significance of annually black carbon lamina in stalagmite from Chituxianren cave, Yunnan Province

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  • 图 1 

    (a) 石笋CTXRD1205的扫描图像;(b,c)为图(a)中红色方框内同一层段透射光和荧光照射下的年纹层,红色箭头对应明亮亚层,黑色箭头对应暗色亚层;(d,e)为图(a)中黄色方框内透射光和荧光照射下的黑碳年纹层,红色箭头指示处为黑碳层

    表 1 

    CTXRD1205 230Th定年结果与微层计数结果对比

    Sample 238U 232Th 230Th/232Th δ234U* 230Th/238U 230Th Age (a) 230Th Age(a) δ234UInitial** 230Th Age***(a B.P.) 230Th Age(A.D.) 微层计数
    Number (ppb) (ppt) (atomic×10-6) (measured) (activity) (uncorrected) (corrected) (corrected) (corrected) (corrected) 结果
    CTXRD1205-5 1108±2 137±4 76.1±25.6 94.8±1.9 0.0006±0.0002 57±19 53±19 95±2 33±19 1967±19 36±1
    CTXRD1205-18 441±1 101±3 146.4±23.9 50.6±2.0 0.0020±0.0003 211±34 205±34 51±2 183±34 1817±34 141±3
    CTXRD1205-60 441±1 578±12 55.3±5.5 42.1±2.1 0.0044±0.0004 461±45 424±52 42±2 404±52 1596±52 409±9
    *δ234U=([234U/238U]activity-1)×1000;**δ234Uinitial was calculated based on230Th age (T),i.e.δ234Uinitial=δ234Umeasured×eλ234T. Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of (4.4±2.2)×10-6. Those are the values for a material at secular equilibrium,with the bulk earth 232Th/238 U value of 3.8. The errors are arbitrarily assumed to be 50 %;* * * B.P. stands for “Before Present” where the “Present” is defined as the year 2000 A.D.
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出版历程
收稿日期:  2022-10-02
修回日期:  2022-11-27
刊出日期:  2023-01-30

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