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DOI | 10.1029/2018GL080866 |
Insights Into Fault-Magma Interactions in an Early-Stage Continental Rift From Source Mechanisms and Correlated Volcano-Tectonic Earthquakes | |
J Oliva, S.1; Ebinger, C. J.1; Wauthier, C.2,3; Muirhead, J. D.4; Roeckers, S. W.5; Rivalta, E.6; Heimann, S.6 | |
2019-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:4页码:2065-2074 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Strain in magmatic rifts is accommodated by both faulting and dike intrusion, but little is known of the frequency of dike intrusions in early-stage rifts. We use a new earthquake data set from a dense temporary seismic array (2013-2014) in the similar to 7-Myr-old Magadi-Natron-Manyara section of the East African Rift, which includes the carbonatitic Oldoinyo Lengai volcano that erupted explosively in 2007-2008. Full moment tensor analyses were performed on M > 3.4 earthquakes (0.03- to 0.10-Hz band) that occurred during the intereruptive cycle. We find two opening crack-type and various non-double-couple earthquake source mechanisms and interpret these as fluid-involved fault rupture. From waveform analysis on the nearest permanent seismic station, we conclude that similar rupture processes probably occur over eruptive and intereruptive cycles. The repeated and dynamically similar fluid-involved seismicity, along with intrabasinal localization of active deformation, suggests that significant and persistent strain is accommodated by magmatic processes, modulated by tectonic cycles. |
英文关键词 | full moment tensor non-double-couple magma-related faulting East Africa rift source mechanism |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461855600019 |
WOS关键词 | DIKE-INDUCED EARTHQUAKES ; CENTROID-MOMENT TENSORS ; NUCLEAR-EXPLOSIONS ; INVERSION ; AFRICA ; SEISMICITY ; EVOLUTION ; UNCERTAINTIES ; KINEMATICS ; EXTENSION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/26301 |
专题 | 气候变化 |
作者单位 | 1.Tulane Univ, New Orleans, LA 70118 USA; 2.Penn State Univ, University Pk, PA 16802 USA; 3.Inst CyberSci, University Pk, PA USA; 4.Syracuse Univ, Syracuse, NY USA; 5.Rensselaer Polytech Inst, Troy, NY USA; 6.GFZ German Ctr Geosci, Potsdam, Germany |
推荐引用方式 GB/T 7714 | J Oliva, S.,Ebinger, C. J.,Wauthier, C.,et al. Insights Into Fault-Magma Interactions in an Early-Stage Continental Rift From Source Mechanisms and Correlated Volcano-Tectonic Earthquakes[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(4):2065-2074. |
APA | J Oliva, S..,Ebinger, C. J..,Wauthier, C..,Muirhead, J. D..,Roeckers, S. W..,...&Heimann, S..(2019).Insights Into Fault-Magma Interactions in an Early-Stage Continental Rift From Source Mechanisms and Correlated Volcano-Tectonic Earthquakes.GEOPHYSICAL RESEARCH LETTERS,46(4),2065-2074. |
MLA | J Oliva, S.,et al."Insights Into Fault-Magma Interactions in an Early-Stage Continental Rift From Source Mechanisms and Correlated Volcano-Tectonic Earthquakes".GEOPHYSICAL RESEARCH LETTERS 46.4(2019):2065-2074. |
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