Interaction of mantle derived melts with crust during the emplacement of the Voring Plateau, NE Atlantic

Trace element and isotopic signatures of magmatic rock samples from ODP Hole 642E at the Voting Plateau provide insight into the interaction processes of mantle melt with crust during the initial magma extrusion phases at the onset of the continental breakup. The intermediate (basaltic-andesitic) to...

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Bibliographic Details
Published in:Marine Geology
Main Authors: Meyer, Romain, Hertogen, Jan, Pedersen, Rolf B, Viereck-Goette, Lothar, Abratis, Michael
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier Scientific Pub. Co. 2009
Subjects:
volcanic margins
continent breakup
petrogenesis
north atlantic igneous province-naip
trace elements
srndpb isotopes
voring plateau
se greenland
margin
ocean
plume
Greenland
North Atlantic
Online Access:https://lirias.kuleuven.be/handle/123456789/305661
http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=DOISource&SrcApp=PRODUCT_NAME&KeyAID=10.1016%2Fj.margeo.2009.02.007&DestApp=DOI&SrcAppSID=APP_SID&SrcJTitle=WURS_TITLE
https://doi.org/10.1016/j.margeo.2009.02.007
https://lirias.kuleuven.be/bitstream/123456789/305661/1//Interaction+of+mantle+derived+melts+with+crust+during+the+emplacement+.pdf
Description
Summary:Trace element and isotopic signatures of magmatic rock samples from ODP Hole 642E at the Voting Plateau provide insight into the interaction processes of mantle melt with crust during the initial magma extrusion phases at the onset of the continental breakup. The intermediate (basaltic-andesitic) to felsic (dacitic and rhyolitic) Lower Series magmas at ODP Hole 642E appear to be produced by large amounts of melting of upper crustal material. This study not only makes use of the traditional geochemical tools to investigate crust-mantle interaction, but also explores the value of Cs geochemistry as an additional tool. The element Cs forms the largest lithophile cation, and shows the largest contrast in concentration between (depleted) mantle and continental crust. As such it is a very sensitive indicator of involvement of crustal material. The Cs data reinforce the conclusion drawn from isotopic signatures that the felsic magmas are largely anatectic crustal melts. The down-hole geochemical variation within CDP Hole 642E defines a decreasing continental crustal influence from the Lower Series into the Upper Series. status: published

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