Mantle plume trail beneath the ca. 1.1 Ga North American Midcontinent Rift revealed by magnetotelluric data

Lin, Wule1,2,3; Schultz, Adam4; Yang, Bo5,6; Harris, Lyal B.7; Hu, Xiangyun1

2024-08-20

10.1093/nsr/nwae239

NATIONAL SCIENCE REVIEW   影响因子和分区

2095-5138

2053-714X

["Whilst the 1.1 Ga North American Midcontinent Rift (MCR) system is formed in association with the Keweenaw mantle plume, the absence of a northern third rift arm or aulacogen (a general characteristic of mantle plumes) has previously not been well understood. To help clarify this unusual plume-rift relationship and to better establish the region affected by the Keweenaw mantle plume, we present the first electrical resistivity model of the MCR derived from 3D inversion of EarthScope USArray and Lithoprobe magnetotelluric (MT) data, extending northwards into the Archean Superior Province. Our model shows a prominent highly conductive anomaly trending NW-SE at the base of Western Superior's cratonic lithospheric mantle, cross-cutting and extending for over 300 km on both sides of the western rift branch. We propose that this anomaly reflects the ancient signature of a plume trail, resulting from metasomatism and/or partial melting of the sulfide-rich basal lithospheric mantle during impingement of the Keweenaw mantle plume.","Geophysical evidence in the Lake Superior region reveals the deep trail left by ancient North America's past rapid plate motion over a mantle plume."]

magnetotelluric Midcontinent Rift Keweenaw mantle plume Superior Province North America

SCI ; EI

英语

其他

National Natural Science Foundation of China["42220104002","42327803"] ; National Key Research and Development Program of China[2022YFF0802800] ; China Scholarship Council[201906410007] ; IRIS Subaward 478 and 489 under United States National Science Foundation["EAR-0323311","EAR-0350030","EAR-032330 9"] ; IRIS Subaward 75-MT under United States National Science Foundation Cooperative Agreement[EAR-0733069] ; IRIS Subaward 05-OSU-SAGE under the United States National Science Foundation Cooperative Agreement[EAR-1261681]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:001294375400002

OXFORD UNIV PRESS

Web of Science

1.China Univ Geosci, Sch Geophys & Geomat, Hubei Subsurface Multiscale Imaging Key Lab, Wuhan 430074, Peoples R China
2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518005, Peoples R China
3.Southern Univ Sci & Technol, Adv Inst Ocean Res, Shenzhen 518005, Peoples R China
4.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA
5.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 511458, Peoples R China
6.China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan
7.Inst Natl Rech Sci, Eau Terre Environm Res Ctr, Quebec City, PQ G1K 9A9, Canada

Lin, Wule,Schultz, Adam,Yang, Bo,et al. Mantle plume trail beneath the ca. 1.1 Ga North American Midcontinent Rift revealed by magnetotelluric data[J]. NATIONAL SCIENCE REVIEW,2024,11(8).

Lin, Wule,Schultz, Adam,Yang, Bo,Harris, Lyal B.,&Hu, Xiangyun.(2024).Mantle plume trail beneath the ca. 1.1 Ga North American Midcontinent Rift revealed by magnetotelluric data.NATIONAL SCIENCE REVIEW,11(8).

Lin, Wule,et al."Mantle plume trail beneath the ca. 1.1 Ga North American Midcontinent Rift revealed by magnetotelluric data".NATIONAL SCIENCE REVIEW 11.8(2024).