Ilmenite: Mantle reservoir for nitrogen?

C. C.P. Madiba; H. Pollak; R. G. Cawthorn; F. Viljoen

Ilmenite: Mantle reservoir for nitrogen?

C. C.P. Madiba, H. Pollak, R. G. Cawthorn, F. Viljoen

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

4 Citations (Scopus)

Abstract

Five ilmenite megacrysts from the Premier kimberlite pipe have been analysed by Mössbauer spectroscopic and electron microprobe techniques for their Fe³⁺/Fe²⁺ ratio; and by nuclear bombardment techniques for their N₂ content. Comparison of the Fe³⁺/Fe²⁺ ratio determined from electron microprobe analysis for total Fe assuming stoichiometry with the direct determination of this ratio by Mössbauer techniques is sufficiently good that the former method which is very widely used may be considered reliable. The N₂ content of the ilmenite samples ranges from 0.5 to 2.0%, considerably in excess of that for most minerals. Heating experiments suggest that the N₂ is not located in liquid inclusions. Isotopic analysis of ilmenite is not available and so its origin is uncertain, but these results suggest that ilmenite could be a major reservoir for N₂ in the earth's mantle.

Original language	English
Pages (from-to)	319-327
Number of pages	9
Journal	Hyperfine Interactions
Volume	111
Issue number	1-4
Publication status	Published - 1998
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

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Cite this

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title = "Ilmenite: Mantle reservoir for nitrogen?",

abstract = "Five ilmenite megacrysts from the Premier kimberlite pipe have been analysed by M{\"o}ssbauer spectroscopic and electron microprobe techniques for their Fe3+/Fe2+ ratio; and by nuclear bombardment techniques for their N2 content. Comparison of the Fe3+/Fe2+ ratio determined from electron microprobe analysis for total Fe assuming stoichiometry with the direct determination of this ratio by M{\"o}ssbauer techniques is sufficiently good that the former method which is very widely used may be considered reliable. The N2 content of the ilmenite samples ranges from 0.5 to 2.0%, considerably in excess of that for most minerals. Heating experiments suggest that the N2 is not located in liquid inclusions. Isotopic analysis of ilmenite is not available and so its origin is uncertain, but these results suggest that ilmenite could be a major reservoir for N2 in the earth's mantle.",

author = "Madiba, {C. C.P.} and H. Pollak and Cawthorn, {R. G.} and F. Viljoen",

year = "1998",

language = "English",

volume = "111",

pages = "319--327",

journal = "Hyperfine Interactions",

issn = "0304-3843",

publisher = "Springer Netherlands",

number = "1-4",

}

TY - JOUR

T1 - Ilmenite

T2 - Mantle reservoir for nitrogen?

AU - Madiba, C. C.P.

AU - Pollak, H.

AU - Cawthorn, R. G.

AU - Viljoen, F.

PY - 1998

Y1 - 1998

N2 - Five ilmenite megacrysts from the Premier kimberlite pipe have been analysed by Mössbauer spectroscopic and electron microprobe techniques for their Fe3+/Fe2+ ratio; and by nuclear bombardment techniques for their N2 content. Comparison of the Fe3+/Fe2+ ratio determined from electron microprobe analysis for total Fe assuming stoichiometry with the direct determination of this ratio by Mössbauer techniques is sufficiently good that the former method which is very widely used may be considered reliable. The N2 content of the ilmenite samples ranges from 0.5 to 2.0%, considerably in excess of that for most minerals. Heating experiments suggest that the N2 is not located in liquid inclusions. Isotopic analysis of ilmenite is not available and so its origin is uncertain, but these results suggest that ilmenite could be a major reservoir for N2 in the earth's mantle.

AB - Five ilmenite megacrysts from the Premier kimberlite pipe have been analysed by Mössbauer spectroscopic and electron microprobe techniques for their Fe3+/Fe2+ ratio; and by nuclear bombardment techniques for their N2 content. Comparison of the Fe3+/Fe2+ ratio determined from electron microprobe analysis for total Fe assuming stoichiometry with the direct determination of this ratio by Mössbauer techniques is sufficiently good that the former method which is very widely used may be considered reliable. The N2 content of the ilmenite samples ranges from 0.5 to 2.0%, considerably in excess of that for most minerals. Heating experiments suggest that the N2 is not located in liquid inclusions. Isotopic analysis of ilmenite is not available and so its origin is uncertain, but these results suggest that ilmenite could be a major reservoir for N2 in the earth's mantle.

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M3 - Article

AN - SCOPUS:2342447457

SN - 0304-3843

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JO - Hyperfine Interactions

JF - Hyperfine Interactions

IS - 1-4

ER -

Ilmenite: Mantle reservoir for nitrogen?

Abstract

ASJC Scopus subject areas

UN SDGs

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