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DOI | 10.1002/2017GL074911 |
The mechanisms underpinning Cenozoic intraplate volcanism in eastern Australia: Insights from seismic tomography and geodynamic modeling | |
Rawlinson, N.1; Davies, D. R.2; Pilia, S.3 | |
2017-10-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:19 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Australia; U Arab Emirates |
英文摘要 | Cenozoic intraplate volcanism is widespread throughout much of eastern Australia and manifests as both age-progressive volcanic tracks and non-age-progressive lava fields. Various mechanisms have been invoked to explain the origin and distribution of the volcanism, but a broad consensus remains elusive. We use results from seismic tomography to demonstrate a clear link between lithospheric thickness and the occurrence, composition, and volume of volcanic outcrop. Furthermore, we find that non-age-progressive lava fields overlie significant cavities in the base of the lithosphere. Based on numerical simulations of mantle flow, we show that these cavities generate vigorous mantle upwellings, which likely promote decompression melting. However, due to the intermittent nature of the lava field volcanics over the last 50Ma, it is probable that transient mechanisms also operate to induce or enhance melting. In the case of the Newer Volcanics Province, the passage of a nearby plume appears to be a likely candidate. Our results demonstrate why detailed 3-D variations in lithospheric thickness, plate motion, and transient sources of mantle heterogeneity need to be considered when studying the origin of non age-progressive volcanism in continental interiors. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413921300019 |
WOS关键词 | UPPER-MANTLE BENEATH ; LITHOSPHERIC STRUCTURE ; SOUTHEAST AUSTRALIA ; FLOW REGIME ; DYNAMICS ; PROVINCE ; CONSTRAINTS ; EVOLUTION ; OROGEN ; THERMODYNAMICS |
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/26996 |
专题 | 气候变化 |
作者单位 | 1.Univ Cambridge, Dept Earth Sci, Bullard Labs, Cambridge, England; 2.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia; 3.Petr Inst, Dept Petr Geosci, Abu Dhabi, U Arab Emirates |
推荐引用方式 GB/T 7714 | Rawlinson, N.,Davies, D. R.,Pilia, S.. The mechanisms underpinning Cenozoic intraplate volcanism in eastern Australia: Insights from seismic tomography and geodynamic modeling[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(19). |
APA | Rawlinson, N.,Davies, D. R.,&Pilia, S..(2017).The mechanisms underpinning Cenozoic intraplate volcanism in eastern Australia: Insights from seismic tomography and geodynamic modeling.GEOPHYSICAL RESEARCH LETTERS,44(19). |
MLA | Rawlinson, N.,et al."The mechanisms underpinning Cenozoic intraplate volcanism in eastern Australia: Insights from seismic tomography and geodynamic modeling".GEOPHYSICAL RESEARCH LETTERS 44.19(2017). |
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