Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
Geology Don't get GSW? Talk to your librarian.
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Geology; November 2004; v. 32; no. 11; p. 945-948; DOI: 10.1130/G21027.1
© 2004 Geological Society of America
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Stroncik, N. A.
Right arrow Articles by Haase, K. M.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Chlorine in oceanic intraplate basalts: Constraints on mantle sources and recycling processes

Nicole A. Stroncik1 and Karsten M. Haase1

1 Institut für Geowissenschaften der Universität Kiel, Olshausenstrasse 40, D-24118 Kiel, Germany

Submarine volcanic glass data from different hotspot regions indicate that the Cl inventory and the Cl/K ratios of the mantle are variable. The majority of hotspot lavas have higher Cl/K ratios than depleted mid-oceanic-ridge basalts, consistent with the presence of recycled crustal components in the mantle-plume sources of hotspots. Enriched mantle sources (EM1 and EM2) have relatively low Cl/K ratios, suggesting significant devolatilization of the subducted sedimentary material. Lavas from HIMU-type hotspots (high µ, µ = 238U/204Pb) have the highest but variable Cl/K, most likely due to the presence of recycled altered oceanic lithosphere in their source. Near-ridge hotspots show correlations between Cl/ K ratios and radiogenic isotopes, supporting mixing between plume and depleted upper-mantle material. The variable Cl/K ratios in the HIMU-type magmas and the low Cl/K ratios in the EM-type magmas suggest that the quantity of Cl recycled into the mantle via subduction is not uniform.

Key Words: volatile recycling • subduction • mantle heterogeneity • mantle end members • ocean island basalts




This article has been cited by other articles:


Home page
 GeologyHome page
G. D. Layne, A. J.R. Kent, and W. Bach
{delta}37Cl systematics of a backarc spreading system: The Lau Basin
Geology, May 1, 2009; 37(5): 427 - 430.
[Abstract] [Full Text] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Geological Society of America