Plume-ridge interaction revisited: Evidence for melt mixing from He, Ne and Ar isotope and abundance systematics

Stroncik N, Niedermann S, Haase K (2008)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2008

Journal

Earth and Planetary Science Letters Elsevier

Publisher: Elsevier

Book Volume: 268

Pages Range: 424-432

DOI: 10.1016/j.epsl.2008.01.037

Abstract

Submarine volcanic glass He, Ne and Ar data from the Pacific-Antarctic-Rise at its intersection with the Foundation Seamount Chain have been obtained to further elucidate one of the main outstanding problems in plume-ridge interaction studies: the physical state in which mantle flow and mixing occur in those settings. Mixing of plume mantle and mid-ocean ridge basalt source material may either be in the form of two solids, of solid-melt or of two melt phases only. The positive correlation of ⁴He/ ⁴⁰Ar ^* with ²⁰⁶Pb/ ²⁰⁴Pb as well as the negative correlation of ⁴He/ ⁴⁰Ar ^* with ⁴⁰Ar ^* and ⁴He concentrations, combined with a lack of correlation between ⁴He/ ⁴⁰Ar ^* and ridge depth or MgO concentration, indicate that the enriched mantle plume material has been extensively degassed prior to mixing with the mid-ocean ridge source material. Degassing of the plume source and mid-ocean ridge source material prior to mixing is also suggested by the He versus Pb isotope systematics. However, the occurrence of degassing processes requires the existence of melts, implying that mixing between the plume and the mid-ocean ridge material occurs in the physical form of melts. © 2008 Elsevier B.V. All rights reserved.

Authors with CRIS profile

Karsten Haase Lehrstuhl für Endogene Geodynamik

Involved external institutions

Christian-Albrechts-Universität zu Kiel

Germany (DE) Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum - GFZ

Germany (DE)

How to cite

APA:

Stroncik, N., Niedermann, S., & Haase, K. (2008). Plume-ridge interaction revisited: Evidence for melt mixing from He, Ne and Ar isotope and abundance systematics. Earth and Planetary Science Letters, 268, 424-432. https://dx.doi.org/10.1016/j.epsl.2008.01.037

MLA:

Stroncik, Nicole, Samuel Niedermann, and Karsten Haase. "Plume-ridge interaction revisited: Evidence for melt mixing from He, Ne and Ar isotope and abundance systematics." Earth and Planetary Science Letters 268 (2008): 424-432.

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