| DOI: | 10.1002/grl.50993
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| 论文题名: | Seismic evidence for lithospheric modification beneath the Mojave Neovolcanic Province, Southern California |
| 作者: | Allison C.M.; Porter R.C.; Fouch M.J.; Semken S.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8484
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| EISSN: | 1944-8215
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| 出版年: | 2013
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| 卷: | 40, 期:19 | | 起始页码: | 5119
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| 结束页码: | 5124
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| 语种: | 英语
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| 英文关键词: | ambient noise tomography
; Cima volcanic field
; lithospheric destabilization
; Mojave block
; receiver functions
; Western North America
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| Scopus关键词: | Ambient noise tomographies
; Lithospheric
; Mojave block
; Receiver functions
; Volcanic field
; Western North America
; Geochemistry
; Tomography
; Volcanoes
; Acoustic noise
; convection
; lithosphere
; mantle
; Miocene
; noise
; Quaternary
; seismic property
; tomography
; volcanism
; wave velocity
; California
; Mojave National Preserve
; United States
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| 英文摘要: | The Mojave Neovolcanic Province (MNVP), located in the Mojave block of southern California, comprises late Miocene to Quaternary small-volume basaltic centers. Geochemistry indicates an asthenospheric source for the MNVP beginning in the late Miocene, but no physical evidence of missing mantle lithosphere has been presented. We utilize receiver functions and ambient noise tomography to image the lithosphere beneath the Mojave block. Regionally, we find thin crust that thickens distal to sites of MNVP volcanism. Shear wave velocities between 40 and 75 km depth are consistent with the presence of mantle lithosphere in the southern Mojave block and very thin or missing mantle lithosphere to the north. With one exception, MNVP volcanoes lie along this sharp boundary. Our observations, together with the established geologic history and geochemistry of the MNVP, can be explained by small-scale edge-driven convection producing ongoing lithospheric removal within the Mojave block. Our results provide another example of lithospheric instability that occurs in response to rapid changes in mantle dynamics induced by major changes in tectonic plate geometry. Key Points Crust is thin and partial melt may exist beneath portions of Mojave block Strong lateral differences in lithosphere control recent (< 5 Ma) volcanism Destruction of Mojave lithosphere continues near Amboy Crater ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84885339332&doi=10.1002%2fgrl.50993&partnerID=40&md5=4e9b0f6bda5f909b58ea21af712b851a
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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/5748
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| Appears in Collections: | 气候减缓与适应
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作者单位: | School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85284, United States
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| Recommended Citation: | |
Allison C.M.,Porter R.C.,Fouch M.J.,et al. Seismic evidence for lithospheric modification beneath the Mojave Neovolcanic Province, Southern California[J]. Geophysical Research Letters,2013-01-01,40(19).
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