Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL088455 |
Compaction‐driven fluid localization as an explanation for lower crustal electrical conductors in an intracontinental setting | |
Matthew J. Comeau; Michael Becken; James A. D. Connolly; Alexander V. Grayver; Alexey V. Kuvshinov | |
2020-09-28 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | We present electrical resistivity models, derived from magnetotelluric data, of the crust beneath the Bulnay region, Mongolia. They reveal that the lower crust contains a pattern of discrete zones (width of ~25 km) of low resistivity (<30 Ωm). Such features may be an effect of unaccounted‐for electrical anisotropy. However, when anisotropy is considered in the modeling, the features remain. We investigate an alternative explanation, based on a conceptual model of fluid localization and stagnation by thermally activated compaction, and demonstrate it is compatible with the observed low‐resistivity zones. The model explains the location, shape, and size of the zones, with plausible values of the activation energy for lower crustal creep (270–360 kJ/mol), and a viscous compaction length on the order of 10 km. The results imply tectonic deformation and compaction processes, rather than lithological‐structural heterogeneity, control the regional lower crustal fluid flow. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/297839 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Matthew J. Comeau,Michael Becken,James A. D. Connolly,等. Compaction‐driven fluid localization as an explanation for lower crustal electrical conductors in an intracontinental setting[J]. Geophysical Research Letters,2020. |
APA | Matthew J. Comeau,Michael Becken,James A. D. Connolly,Alexander V. Grayver,&Alexey V. Kuvshinov.(2020).Compaction‐driven fluid localization as an explanation for lower crustal electrical conductors in an intracontinental setting.Geophysical Research Letters. |
MLA | Matthew J. Comeau,et al."Compaction‐driven fluid localization as an explanation for lower crustal electrical conductors in an intracontinental setting".Geophysical Research Letters (2020). |
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