Modeling thermal history of subducting crust in Nankai Trough: Constraints from in situ sediment temperature and diagenetic reaction progress
Modeling thermal history of subducting crust in Nankai Trough: Constraints from in situ sediment temperature and diagenetic reaction progress
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南开海槽俯冲地壳热历史模拟：原位沉积物温度和成岩反应进程的约束
DOI：
10.1029/2005gl022793
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发表时间：
2005
影响因子：
5.2
通讯作者：
M. Underwood
中科院分区：
文献类型：
--
作者：
G. Spinelli;M. Underwood
伊利石/蒙脱石混层粘土中的钻孔温度和蒙皂石百分比值提供了有关南开海槽俯冲带基底热通量历史的重要信息。沉积物积累、热传导和伊利石/蒙脱石成岩作用的数值模拟可以对 ODP 1173 站点的各种热历史情景进行比较。在我们的首选模型中，沉积的前 10 Ma 期间的基础热通量接近传导冷却地壳的典型值。在过去 5 Ma 中，基础热通量高于预期。异常热通量可能受到离轴火山活动和热液循环的影响。
Values of borehole temperature and %‐smectite in illite/smectite mixed‐layer clay provide important information about the basal heat flux history of the Nankai Trough subduction zone. Numerical simulations of sediment accumulation, heat conduction, and illite/smectite diagenesis permit comparisons of various thermal‐history scenarios for ODP Site 1173. In our preferred models, basal heat flux during the first 10 Ma of sedimentation was near typical values for conductively cooling crust. During the last 5 Ma, basal heat flux was higher than expected. The anomalous heat flux was likely influenced by both off‐axis volcanism and hydrothermal circulation.