Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090020 |
Pseudotachylyte alteration and the rapid fade of earthquake scars from the geological record | |
M. Fondriest; J. Mecklenburgh; F. X. Passelegue; G. Artioli; F. Nestola; E. Spagnuolo; M. Rempe; G. Di Toro | |
2020-11-04 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Tectonic pseudotachylytes are solidified frictional melts produced on faults during earthquakes and are robust markers of seismic slip events. Nonetheless, pseudotachylytes are apparently uncommon fault rocks, because they are either rarely produced, or are easily lost from the geological record. To solve this conundrum, long‐lasting (18‐35 days) hydrothermal alteration tests were performed on fresh pseudotachylytes produced by sliding solid rock samples at seismic slip rates in the laboratory. After all tests, the pseudotachylytes were heavily altered with dissolution of the matrix and neo‐formation of clay aggregates. Post‐alteration products closely resemble natural altered pseudotachylytes and associated ultracataclasites (i.e. fault rocks affected by fracturing in the absence of melting), demonstrating that the preservation potential of original pseudotachylyte microstructures is very short, days to months, in the presence of hydrothermal fluids. As a consequence, pseudotachylytes might be significantly underrepresented in the geological record and on‐fault frictional melting during earthquakes is likely to occur more commonly than generally believed. |
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/301762 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | M. Fondriest,J. Mecklenburgh,F. X. Passelegue,et al. Pseudotachylyte alteration and the rapid fade of earthquake scars from the geological record[J]. Geophysical Research Letters,2020. |
APA | M. Fondriest.,J. Mecklenburgh.,F. X. Passelegue.,G. Artioli.,F. Nestola.,...&G. Di Toro.(2020).Pseudotachylyte alteration and the rapid fade of earthquake scars from the geological record.Geophysical Research Letters. |
MLA | M. Fondriest,et al."Pseudotachylyte alteration and the rapid fade of earthquake scars from the geological record".Geophysical Research Letters (2020). |
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