西永2井铁白云岩Fe同位素地球化学性质及特征

许红, 张海洋, 李绪深, 沈江远, 马骁, 付和平, 张道军, 苏大鹏, 闫桂京, 董刚, 刘新宇, 闫琢玉. 西永2井铁白云岩Fe同位素地球化学性质及特征[J]. 海洋地质前沿, 2021, 37(6): 1-7. doi: 10.16028/j.1009-2722.2021.002
引用本文: 许红, 张海洋, 李绪深, 沈江远, 马骁, 付和平, 张道军, 苏大鹏, 闫桂京, 董刚, 刘新宇, 闫琢玉. 西永2井铁白云岩Fe同位素地球化学性质及特征[J]. 海洋地质前沿, 2021, 37(6): 1-7. doi: 10.16028/j.1009-2722.2021.002
XU Hong, ZHANG Haiyang, LI Xushen, SHEN Jiangyuan, MA Xiao, FU Heping, ZHANG Daojun, SU Dapeng, YAN Guijing, DONG Gang, LIU Xinyu, YAN Zhuoyu. GEOCHEMICAL BEHAVIORS AND CHARACTERISTICS OF IRON ISOTOPE IN THE FERROAN DOLOMITE FROM WELL XIYONG 2[J]. Marine Geology Frontiers, 2021, 37(6): 1-7. doi: 10.16028/j.1009-2722.2021.002
Citation: XU Hong, ZHANG Haiyang, LI Xushen, SHEN Jiangyuan, MA Xiao, FU Heping, ZHANG Daojun, SU Dapeng, YAN Guijing, DONG Gang, LIU Xinyu, YAN Zhuoyu. GEOCHEMICAL BEHAVIORS AND CHARACTERISTICS OF IRON ISOTOPE IN THE FERROAN DOLOMITE FROM WELL XIYONG 2[J]. Marine Geology Frontiers, 2021, 37(6): 1-7. doi: 10.16028/j.1009-2722.2021.002

西永2井铁白云岩Fe同位素地球化学性质及特征

  • 基金项目: 国家自然科学基金(41872114);国家科技基础资源调查专项课题(2017FY201407)
详细信息
    通讯作者: 许 红(1957—),男,博士,研究员,主要从事油气地质调查与资源勘探评价及海洋生物礁成因研究工作. E-mail:qdxhong@163.com
  • 中图分类号: P736.4;P588.24

GEOCHEMICAL BEHAVIORS AND CHARACTERISTICS OF IRON ISOTOPE IN THE FERROAN DOLOMITE FROM WELL XIYONG 2

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  • 白云岩发现于200多年前,至今仍然是地球科学研究前沿。西沙群岛白云岩研究超过35 a,发现铁白云岩10 a,属于研究热点。本文在西永2井前期铁白云岩测试研究基础之上,采集典型铁白云岩岩心样品,完成Fe同位素测试,通过对比多种地质储库Fe同位素特征,阐述定位该批测试数据的性质、特征和分析其母源,提出加强投入,与高尖石岛火山岩铁同位素测试结果地球化学特征朔源对比分析的建议。该项研究对于铁白云岩成因特征和机制研究具有重要价值。

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  • 图 1  西永2井新近系岩心剖面柱状图

    Figure 1. 

    图 2  Nu Plasma HR型MC-ICP-MS实图和结构示意图

    Figure 2. 

    图 3  高分辨下Fe同位素与干扰峰的分离

    Figure 3. 

    图 4  西永2井铁白云岩铁同位素δ56Fe随深度的变化

    Figure 4. 

    图 5  不同地质储库的Fe同位素组成

    Figure 5. 

    表 1  影响Fe同位素的潜在干扰信号

    Table 1.  Potential interference signals affecting Fe isotope results

    同位素质量数天然丰度/%干扰元素
    54Fe53.939 615.8454Cr、[27Al27Al]+、[37Cl16OH]+、[40Ca12C]+、[40Ca14N]+、[40Ar14N]+
    55Fe55.934 9491.76[28Si28Si]+、[40Ca14N]+、[40Ar16O]+
    56Fe56.935 42.12[40Ar17OH]+、[40Ar17O]+
    57Fe57.933 280.2858Ni、[40Ar18O]+
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收稿日期:  2021-01-04
刊出日期:  2021-06-28

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