Subduction history of the Caribbean from upper-mantle seismic imaging and plate reconstruction.
Subduction history of the Caribbean from upper-mantle seismic imaging and plate reconstruction.
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DOI：
10.1038/s41467-021-24413-0
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发表时间：
2021-07-09
影响因子：
16.6
通讯作者：
Wilson M
中科院分区：
文献类型：
--
作者：
Braszus B;Goes S;Allen R;Rietbrock A;Collier J;Harmon N;Henstock T;Hicks S;Rychert CA;Maunder B;van Hunen J;Bie L;Blundy J;Cooper G;Davy R;Kendall JM;Macpherson C;Wilkinson J;Wilson M
加勒比海的边缘和相关的灾害和资源是由于对俯冲历史知之甚少而形成的。利用新的数据，我们改进了东加勒比海上地幔的P-Wave成像，并将确定的俯冲板块碎片与板块重建预测的沟槽位置进行比较。这表明，在南美洲以下700 - 1200公里深处的物质来自90 - 1.15亿年的向西俯冲，在加勒比大火成岩省火山活动之前开始。在较浅的深度，俯冲物质的积累归因于加勒比俯冲大弧，因为它在过去的70马。我们解释这些俯冲板块异常的差距：板块窗口和撕裂沿着俯冲原加勒比海脊，撕裂沿着俯冲断裂带，和俯冲的挥发物丰富的边界之间的原加勒比和大西洋域。弧后扩张和弧跳跃的阶段与俯冲板块的年龄变化有关，因此也与俯冲板块的浮力有关。俯冲板块的地震成像提供了一种改善板块构造重建的方法。在这里，Braszus等人使用来自小安的列斯群岛的新海底地震仪数据来定位俯冲扩张中心和断层，从而对加勒比板块的演变提供了新的认识。
The margins of the Caribbean and associated hazards and resources have been shaped by a poorly understood history of subduction. Using new data, we improve teleseismic P-wave imaging of the eastern Caribbean upper mantle and compare identified subducted-plate fragments with trench locations predicted from plate reconstruction. This shows that material at 700–1200 km depth below South America derives from 90–115 Myr old westward subduction, initiated prior to Caribbean Large-Igneous-Province volcanism. At shallower depths, an accumulation of subducted material is attributed to Great Arc of the Caribbean subduction as it evolved over the past 70 Ma. We interpret gaps in these subducted-plate anomalies as: a plate window and tear along the subducted Proto-Caribbean ridge; tearing along subducted fracture zones, and subduction of a volatile-rich boundary between Proto-Caribbean and Atlantic domains. Phases of back-arc spreading and arc jumps correlate with changes in age, and hence buoyancy, of the subducting plate. Seismic imaging of subducted plates offers a way to improve plate tectonic reconstructions. Here, Braszus et al. use new ocean-bottom seismometer data from the Lesser Antilles to locate subducted spreading centres and faults thus providing a new understanding of the evolution of the Caribbean plate.
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影响因子：
12.1
作者：
Boschman, Lydian M.;van Hinsbergen, Douwe J. J.;Pindell, James L.
通讯作者：
Pindell, James L.
影响因子：
5.3
作者：
Agrusta, Roberto;Goes, Saskia;van Hunen, Jeroen
通讯作者：
van Hunen, Jeroen
影响因子：
3.9
作者：
Boschman, L. M.;van der Wiel, E.;van Hinsbergen, D. J. J.
通讯作者：
van Hinsbergen, D. J. J.
影响因子：
2.3
作者：
Braz, Carmen;Seton, Maria;Mueller, R. Dietmar
通讯作者：
Mueller, R. Dietmar
影响因子：
4.2
作者：
Corsini, M.;Lardeaux, J. M.;Balagne, M.
通讯作者：
Balagne, M.