How Accretionary Prisms Elucidate Seismogenesis in Subduction Zones
How Accretionary Prisms Elucidate Seismogenesis in Subduction Zones
复制标题
增生棱镜如何阐明俯冲带的地震成因
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Meneghini Francesca
中科院分区：
文献类型：
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作者：
J. Moore;R. Christie;Meneghini Francesca
地震沿着板块边界逆冲断层发生，这些逆冲断层位于增生棱柱体之下，而地震沿着不连续逆冲断层发生，这些逆冲断层穿过棱柱体。热模型表明，板块边界逆冲断层上的地震在125 ° C到350 ° C左右的温度范围内发生。由于在增生棱柱体中记录的同变形成岩和变质蚀变具有特定的温度范围，因此蚀变和相关变形可以与增生棱柱体孕震的温度范围相关联。对孕震区上方、内部和下方变形的加积岩进行比较，表明孕震区深处岩石的特征可能使其易于发生地震。
Earthquakes occur along the plate-boundary thrusts underlying accretionary prisms and along out-of-sequence thrusts that cut through prisms. Thermal models suggest that the earthquakes on the plate-boundary thrusts initiate in a temperature range of 125 o C to about 350 o C. Because syndeformational diagenetic and metamorphic alterations recorded in accretionary prisms have specific temperature ranges, the alterations and the associated deformation can be correlated to the temperature range that accretionary prisms are seismogenic. Comparison of accreted rocks deformed above, within, and below the seismogenic zone suggests characteristics of rocks at seismogenic depths that may make them earthquake-prone.