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

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

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
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 ofWestern 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.

magnetotelluricMidcontinent RiftKeweenaw mantle plumeSuperior ProvinceNorth America

Wule Lin、Adam Schultz、Bo Yang、Lyal B.Harris、Xiangyun Hu

展开 >

Hubei Subsurface Multi-scale Imaging Key Laboratory,School of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China

Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen 518005,China

Advanced Institute for Ocean Research,Southern University of Science and Technology,Shenzhen 518005,China

College of Earth,Ocean and Atmospheric Sciences,Oregon State University,Corvallis,OR 97331,USA

Key Laboratory of Ocean and Marginal Sea Geology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 511458,China

China-Pakistan Joint Research Center on Earth Sciences,CAS-HEC,Islamabad 45320,Pakistan

Eau Terre Environnement Research Centre,Institut National de la Recherche Scientifique,Quebec,QC G1K 9A9,Canada

Hubei Subsurface Multi-Scale Imaging Key Laboratory, School of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China

展开 >

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaChina Scholarship CouncilUnited States National Science FoundationIRIS Subaward 478 and 489 under the United States National Science Foundation Cooperative AgreementIRIS Subaward 478 and 489 under the United States National Science Foundation Cooperative AgreementIRIS Subaward 75-MT under the United States National Science Foundation Cooperative AgreementIRIS Subaward 05-OSU-SAGE under the United States National Science Foundation Cooperative AgreementTGI-5 grant by Natural Resources Canada

42220104002423278032022YFF0802800201906410007EAR-0323311EAR-0350030EAR-0323309EAR-0733069EAR-1261681

2024

10.1093/nsr/nwae239

国家科学评论(英文版)

国家科学评论(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.11(8)