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Whittaker  J  M, Afonso  J  C, Masterton  S, Müller  R  D, Wessel  P, Williams  S  E, Seton  M, 孙嘉祥, 李霓. 大洋中脊和地幔柱之间的长期相互作用[J]. 地震科学进展, 2018, (9): 2-8. doi: 10.3969/j.issn.0253-4975.2018.09.002
引用本文: Whittaker  J  M, Afonso  J  C, Masterton  S, Müller  R  D, Wessel  P, Williams  S  E, Seton  M, 孙嘉祥, 李霓. 大洋中脊和地幔柱之间的长期相互作用[J]. 地震科学进展, 2018, (9): 2-8. doi: 10.3969/j.issn.0253-4975.2018.09.002
Long-term interaction between mid-ocean ridges and mantle plumes[J]. Progress in Earthquake Sciences, 2018, (9): 2-8. doi: 10.3969/j.issn.0253-4975.2018.09.002
Citation: Long-term interaction between mid-ocean ridges and mantle plumes[J]. Progress in Earthquake Sciences, 2018, (9): 2-8. doi: 10.3969/j.issn.0253-4975.2018.09.002

大洋中脊和地幔柱之间的长期相互作用

doi: 10.3969/j.issn.0253-4975.2018.09.002
详细信息
    通讯作者:

    Whittaker J  M,e-mail: jo.whittaker@utas.edu.au

  • 中图分类号: P315

Long-term interaction between mid-ocean ridges and mantle plumes

  • 图  1  全球数据集

    (a)彩线代表复原的大洋中脊位置,紫色区域代表热点(圆圈)周围的大火成岩省,LLSVP表示利用SMEAN层析成像模型显示距核-幔边界92 km之处的景象[21]。黑框圈出的区域代表计算出的洋中脊沿流线迁移的地方。CATL:中大西洋,EPAC:东太平洋,NATL:北大西洋,NWIR:西北印度洋脊,SEIR:东南印度洋脊,sSATL:南大西洋南部,SWIR:西南印度洋脊;(b)估算的带到洋脊的上地幔VEM;(c)100—175 km深处的GyPSumP波波速[22](原图为彩图)

    图  2  区域性的洋中脊时空迁移模式以及VEM与洋中脊玄武岩地球化学和地震速度的比较

    (a)0—100 Ma洋中脊迁移距离总量;(b)洋中脊迁移速率/扩张速率;(c)—(e)从距离最近的深源地幔柱[19]到1 000 km之外的洋中脊部分估算的全球地幔抽取量(VEM)和主量元素地球化学CaO/Al2O3(c)、NaO8(d)和FeO8(e)的对比[26]。黑色线代表最小二乘法回归分析;(f)估算的全球地幔抽取量(VEM)与S波(黑色)和P波(红色)速度异常(100—175 km)(原图为彩图)

    图  3  洋中脊处深源地幔柱和浅部地幔上涌过程示意图

    (a)深源地幔柱和洋中脊相互作用示意图。黑色圆圈以及内部红色部分代表地幔柱通道。红线代表洋中脊,彩线代表洋中脊在10 Ma时间段的迁移。方框代表将要发生在图(b)和(c)中过程的区域;(b)在迁移速率为0的静态洋中脊处,模拟的上地幔温度结构;(c)洋中脊迁移时,模拟的上地幔温度结构。vSR:扩张速率,vr:洋中脊速率。在(b)、(c)中带箭头的黑线指示地幔流,红色虚线表示等温线(原图为彩图)

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出版历程
  • 收稿日期:  2017-12-04
  • 修回日期:  2018-01-20
  • 刊出日期:  2018-09-01

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