DOI: 10.1002/grl.50295
论文题名: Variations in Mid-Continent Rift magma volumes consistent with microplate evolution
作者: Merino M. ; Keller G.R. ; Stein S. ; Stein C.
刊名: Geophysical Research Letters
ISSN: 0094-9148
EISSN: 1944-8879
出版年: 2013
卷: 40, 期: 8 起始页码: 1513
结束页码: 1516
语种: 英语
英文关键词: gravity
; magmatism
; mid-continent rift
; rift
Scopus关键词: Gravity data
; Lake Superior
; Magmatisms
; mid-continent rift
; Plate boundaries
; rift
; Rift systems
; Spreading ridge
; Earth sciences
; Geophysics
; Gravitation
; Tectonics
; climate variation
; data acquisition
; gravity flow
; hot spot
; leakage
; magma
; magmatism
; microplate
; tectonic evolution
; volcanism
; Midcontinent Rift
英文摘要: Modeling of gravity data along the ~1.1 Ga failed Mid-Continent Rift System shows systematic patterns in magma volume between and along the rift's two arms. The volume of magma increases towards the Lake Superior region, consistent with magma flowing away from a hotspot source there. The west arm experienced significantly more magmatism. These patterns are consistent with a model in which the two rift arms acted as boundaries of a microplate. The volume of magma along the west arm increases with distance from the Euler pole, indicating that it acted essentially as a spreading ridge, whereas the much smaller magma volumes along the east arm are consistent with its acting as a leaky transform. This view of the rift system's evolution is compatible with the rift being part of an evolving plate boundary system rather than an isolated episode of midplate volcanism. Key Points The west arm of the MCRS experienced more magmatism than the east arm. Distribution of magma is consistent with flow from a hotspot. Magma distribution in the MCRS is consistent with a microplate model. ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877973052&doi=10.1002%2fgrl.50295&partnerID=40&md5=e6c4387462d4f71330213d1eaa3c3525
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6412
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Planetary Sciences, Northwestern University, Evanston, IL 60208, United States
Recommended Citation:
Merino M.,Keller G.R.,Stein S.,et al. Variations in Mid-Continent Rift magma volumes consistent with microplate evolution[J]. Geophysical Research Letters,2013-01-01,40(8).