Drainage, topographic, and gravity anomalies in the Lake Superior Region: Evidence for a 1100 Ma mantle plume

A topographic dome, radial drainage pattern, and regional negative gravity anomaly, all centered on Lake Superior, are vestiges of a 1100 Ma mantle plume that formed the Midcontinent Rift System of central North America. The topographic and gravimetric relations suggest that the dome is maintained i...

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Veröffentlicht in:	Geophysical research letters 1992-11, Vol.19 (21), p.2119-2122
Hauptverfasser:	Allen, David J., Hinze, William J., Cannon, William F.
Format:	Artikel
Sprache:	eng
Schlagworte:	Domes Drainage Geophysics Gravity anomalies Lake Superior Lithosphere Mantle Plumes
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creator	Allen, David J. Hinze, William J. Cannon, William F.
description	A topographic dome, radial drainage pattern, and regional negative gravity anomaly, all centered on Lake Superior, are vestiges of a 1100 Ma mantle plume that formed the Midcontinent Rift System of central North America. The topographic and gravimetric relations suggest that the dome is maintained isostatically by fundamental changes imprinted on the lithosphere by the plume, including magmatic underplating of the crust and depletion of the upper mantle. These changes occurred at distances of up to 500 km or more from the center of the plume, well beyond the margins of the rift.
doi_str_mv	10.1029/92GL02285
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These changes occurred at distances of up to 500 km or more from the center of the plume, well beyond the margins of the rift.</description><subject>Domes</subject><subject>Drainage</subject><subject>Geophysics</subject><subject>Gravity anomalies</subject><subject>Lake Superior</subject><subject>Lithosphere</subject><subject>Mantle</subject><subject>Plumes</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><recordid>eNqFkVtrFEEQhRtRcI0--A_6SRQySfV92zezJmvIqJhVfGx6Z2o2beZm92zi_ns7rOQtBgrqwncOBYeQ1wyOGHB7bPmyBM7n6gmZMStlMQcwT8kMwOaZG_2cvEjpFwAIEGxGuo_Rh95v8JBOwzhsoh-vQnVIfV_TvNyEaZfnofNtwERDT6crpKW_RrrajhjDEOklbsLQv6enN6HGvkLa5KOnjAHQz552vp9apGO77fAledb4NuGrf_2A_Dg7_b74VJRfl-eLD2XhpVKiYOtaN1B7aDh4X8u1MRZtA9qwaq2tUEoZJhtUwIS1WhuwqkKu5sBrrRgTB-TN3neMw-8tpsl1IVXYtr7HYZscVxpy6UdBNudcAdw5vv0_qCXnlkmrH0cVl_ltMDyj7_ZoFYeUIjZujKHzcecYuLs83X2emT3as7ehxd3DoFtelloYkQXFXhDShH_uBT5eO22EUe7nl6Xj8sKuVosT9038BepSq4g</recordid><startdate>19921103</startdate><enddate>19921103</enddate><creator>Allen, David J.</creator><creator>Hinze, William J.</creator><creator>Cannon, William F.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>19921103</creationdate><title>Drainage, topographic, and gravity anomalies in the Lake Superior Region: Evidence for a 1100 Ma mantle plume</title><author>Allen, David J. ; Hinze, William J. ; Cannon, William F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4553-1bd6f0da0f20aad4b779e9f0671cb693555714fe501399667095ce25802d65113</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Domes</topic><topic>Drainage</topic><topic>Geophysics</topic><topic>Gravity anomalies</topic><topic>Lake Superior</topic><topic>Lithosphere</topic><topic>Mantle</topic><topic>Plumes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Allen, David J.</creatorcontrib><creatorcontrib>Hinze, William J.</creatorcontrib><creatorcontrib>Cannon, William F.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Allen, David J.</au><au>Hinze, William J.</au><au>Cannon, William F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Drainage, topographic, and gravity anomalies in the Lake Superior Region: Evidence for a 1100 Ma mantle plume</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>1992-11-03</date><risdate>1992</risdate><volume>19</volume><issue>21</issue><spage>2119</spage><epage>2122</epage><pages>2119-2122</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>A topographic dome, radial drainage pattern, and regional negative gravity anomaly, all centered on Lake Superior, are vestiges of a 1100 Ma mantle plume that formed the Midcontinent Rift System of central North America. The topographic and gravimetric relations suggest that the dome is maintained isostatically by fundamental changes imprinted on the lithosphere by the plume, including magmatic underplating of the crust and depletion of the upper mantle. These changes occurred at distances of up to 500 km or more from the center of the plume, well beyond the margins of the rift.</abstract><pub>Blackwell Publishing Ltd</pub><doi>10.1029/92GL02285</doi><tpages>4</tpages></addata></record>
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source	Wiley-Blackwell Journals
subjects	Domes Drainage Geophysics Gravity anomalies Lake Superior Lithosphere Mantle Plumes
title	Drainage, topographic, and gravity anomalies in the Lake Superior Region: Evidence for a 1100 Ma mantle plume
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