Mantle hotspot neon in basalts from the Northwest Lau Back-arc Basin

J. E. Lupton; R. J. Arculus; L. J. Evans; D. W. Graham

doi:10.1029/2012GL051201

Mantle hotspot neon in basalts from the Northwest Lau Back-arc Basin

J. E. Lupton^*, R. J. Arculus, L. J. Evans, D. W. Graham

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The neon isotope compositions of basalts from the Northwest Lau Back-arc Basin reflect three-component mixing between an ocean island basalt (OIB) mantle hotspot component, mid-ocean ridge basalt (MORB) mantle, and atmosphere. Our study confirms that a mantle hotspot signature is present in the neon isotopes of both the Rochambeau Rifts and the Northwest Lau Spreading Center (NWLSC), just as it is in the helium isotopes. Furthermore, the Ne isotope signature in the Rochambeau Rifts lava having the highest ³He/⁴He ratio (28 R_a) most closely resembles that observed previously in the highest ³He/⁴He lavas from Samoa. The coupled He-Ne isotope systematics are further evidence for incursion into this region of material derived from the Samoan mantle plume.

Original language	English
Article number	L08308
Journal	Geophysical Research Letters
Volume	39
Issue number	8
DOIs	https://doi.org/10.1029/2012GL051201
Publication status	Published - 1 Apr 2012

Access to Document

10.1029/2012GL051201

Cite this

@article{86882b5f8c79469db4429ccc7213ec4c,

title = "Mantle hotspot neon in basalts from the Northwest Lau Back-arc Basin",

abstract = "The neon isotope compositions of basalts from the Northwest Lau Back-arc Basin reflect three-component mixing between an ocean island basalt (OIB) mantle hotspot component, mid-ocean ridge basalt (MORB) mantle, and atmosphere. Our study confirms that a mantle hotspot signature is present in the neon isotopes of both the Rochambeau Rifts and the Northwest Lau Spreading Center (NWLSC), just as it is in the helium isotopes. Furthermore, the Ne isotope signature in the Rochambeau Rifts lava having the highest 3He/4He ratio (28 Ra) most closely resembles that observed previously in the highest 3He/4He lavas from Samoa. The coupled He-Ne isotope systematics are further evidence for incursion into this region of material derived from the Samoan mantle plume.",

author = "Lupton, {J. E.} and Arculus, {R. J.} and Evans, {L. J.} and Graham, {D. W.}",

year = "2012",

month = apr,

day = "1",

doi = "10.1029/2012GL051201",

language = "English",

volume = "39",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "John Wiley & Sons Inc.",

number = "8",

}

TY - JOUR

T1 - Mantle hotspot neon in basalts from the Northwest Lau Back-arc Basin

AU - Lupton, J. E.

AU - Arculus, R. J.

AU - Evans, L. J.

AU - Graham, D. W.

PY - 2012/4/1

Y1 - 2012/4/1

N2 - The neon isotope compositions of basalts from the Northwest Lau Back-arc Basin reflect three-component mixing between an ocean island basalt (OIB) mantle hotspot component, mid-ocean ridge basalt (MORB) mantle, and atmosphere. Our study confirms that a mantle hotspot signature is present in the neon isotopes of both the Rochambeau Rifts and the Northwest Lau Spreading Center (NWLSC), just as it is in the helium isotopes. Furthermore, the Ne isotope signature in the Rochambeau Rifts lava having the highest 3He/4He ratio (28 Ra) most closely resembles that observed previously in the highest 3He/4He lavas from Samoa. The coupled He-Ne isotope systematics are further evidence for incursion into this region of material derived from the Samoan mantle plume.

AB - The neon isotope compositions of basalts from the Northwest Lau Back-arc Basin reflect three-component mixing between an ocean island basalt (OIB) mantle hotspot component, mid-ocean ridge basalt (MORB) mantle, and atmosphere. Our study confirms that a mantle hotspot signature is present in the neon isotopes of both the Rochambeau Rifts and the Northwest Lau Spreading Center (NWLSC), just as it is in the helium isotopes. Furthermore, the Ne isotope signature in the Rochambeau Rifts lava having the highest 3He/4He ratio (28 Ra) most closely resembles that observed previously in the highest 3He/4He lavas from Samoa. The coupled He-Ne isotope systematics are further evidence for incursion into this region of material derived from the Samoan mantle plume.

UR - http://www.scopus.com/inward/record.url?scp=84860602156&partnerID=8YFLogxK

U2 - 10.1029/2012GL051201

DO - 10.1029/2012GL051201

M3 - Article

SN - 0094-8276

VL - 39

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 8

M1 - L08308

ER -

Mantle hotspot neon in basalts from the Northwest Lau Back-arc Basin

Abstract

Access to Document

Other files and links

Fingerprint

Cite this