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

被引：18

作者：

Lupton, J. E. ^{[1
]}

Arculus, R. J. ^{[2
]}

Evans, L. J. ^{[3
]}

Graham, D. W. ^{[4
]}

机构：

[1] NOAA, Pacific Marine Environm Lab, Newport, OR 97365 USA

[2] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia

[3] Oregon State Univ, Cooperat Inst Marine Resources Studies, Newport, OR USA

[4] Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2012年 / 39卷

基金：

美国国家科学基金会;

关键词：

ARGON ISOTOPE SYSTEMATICS; NOBLE-GASES; SOLAR COMPONENT; LOIHI SEAMOUNT; GLASSES; HELIUM; RIDGE; ISLAND; GEOCHEMISTRY; RATIOS;

D O I：

10.1029/2012GL051201

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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 He-3/He-4 ratio (28 R-a) most closely resembles that observed previously in the highest He-3/He-4 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. Citation: Lupton, J. E., R. J. Arculus, L. J. Evans, and D. W. Graham (2012), Mantle hotspot neon in basalts from the Northwest Lau Back-arc Basin, Geophys. Res. Lett., 39, L08308, doi: 10.1029/2012GL051201.

引用

页数：6

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