| DOI: | 10.1002/grl.50830
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| 论文题名: | Slab tears and intermediate-depth seismicity |
| 作者: | Meighan H.E.; Ten Brink U.; Pulliam J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8653
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| EISSN: | 1944-8384
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| 出版年: | 2013
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| 卷: | 40, 期:16 | | 起始页码: | 4244
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| 结束页码: | 4248
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| 语种: | 英语
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| 英文关键词: | intermediate seismicity
; slab tear
; subduction corner
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| Scopus关键词: | Active tectonics
; intermediate seismicity
; Plate boundaries
; slab tear
; Subducting slabs
; subduction corner
; Tear propagation
; Triple junction
; Tensile stress
; Seismic waves
; cluster analysis
; plate boundary
; seismicity
; slab
; strike-slip fault
; subduction zone
; tectonic structure
; Aakkar
; Gibraltar Arc
; Lebanon
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| 英文摘要: | Active tectonic regions where plate boundaries transition from subduction to strike slip can take several forms, such as triple junctions, acute, and obtuse corners. Well-documented slab tears that are associated with high rates of intermediate-depth seismicity are considered here: Gibraltar arc, the southern and northern ends of the Lesser Antilles arc, and the northern end of Tonga trench. Seismicity at each of these locations occurs, at times, in the form of swarms or clusters, and various authors have proposed that each marks an active locus of tear propagation. The swarms and clusters start at the top of the slab below the asthenospheric wedge and extend 30-60 km vertically downward within the slab. We propose that these swarms and clusters are generated by fluid-related embrittlement of mantle rocks. Focal mechanisms of these swarms generally fit the shear motion that is thought to be associated with the tearing process. Key Points The point of slab tear propagation is marked by intermediate swarms/clusters Seismic swarms/clusters start at the top of the subducting slab Vertically distributed tear events in Caribbean are similar to other locations. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84882759715&doi=10.1002%2fgrl.50830&partnerID=40&md5=e2ecd3446abe5e58b963d5d32d0cd6e0
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/5917
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Geology Department, Baylor University, One Bear Place #97354, Waco, TX 76798, United States
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| Recommended Citation: | |
Meighan H.E.,Ten Brink U.,Pulliam J.. Slab tears and intermediate-depth seismicity[J]. Geophysical Research Letters,2013-01-01,40(16).
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