Trace-element and Nd isotopic variations in early Proterozoic dyke swarms emplaced in the vicinity of the Kapuskasing structural zone: enriched mantle or assimilation and fractional crystallization (AFC) process?

M. Boily; J. N. Ludden

doi:10.1139/e91-003

Trace-element and Nd isotopic variations in early Proterozoic dyke swarms emplaced in the vicinity of the Kapuskasing structural zone: enriched mantle or assimilation and fractional crystallization (AFC) process?

M. Boily, J. N. Ludden

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

13 Citations (Scopus)

Abstract

Several Early Proterozoic Hearst-Matachewan (2.454 Ga), Kapuskasing (2.14 Ga), and Preissac (2.04 Ga) dykes were emplaced within the Archean crust surrounding the Kapuskasing structural zone (KSZ). The dykes are composed of moderately to highly fractionated tholeiitic basalts that exhibit trace-element characteristics similar to those of intraplate basaltic magmas or ocean-island basalts. Their initial Nd isotopic compositions display a range of depleted (ε_Nd _i = +2.9) to enriched (ε_Ndi = -2.0) values that are negatively correlated with the degree of light rare-earth element enrichment. Two models for the origin of these dykes are evaluated. -from Authors

Original language	English
Pages (from-to)	26-36
Number of pages	11
Journal	Canadian Journal of Earth Sciences
Volume	28
Issue number	1
DOIs	https://doi.org/10.1139/e91-003
Publication status	Published - 1991

ASJC Scopus subject areas

General Earth and Planetary Sciences

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title = "Trace-element and Nd isotopic variations in early Proterozoic dyke swarms emplaced in the vicinity of the Kapuskasing structural zone: enriched mantle or assimilation and fractional crystallization (AFC) process?",

abstract = "Several Early Proterozoic Hearst-Matachewan (2.454 Ga), Kapuskasing (2.14 Ga), and Preissac (2.04 Ga) dykes were emplaced within the Archean crust surrounding the Kapuskasing structural zone (KSZ). The dykes are composed of moderately to highly fractionated tholeiitic basalts that exhibit trace-element characteristics similar to those of intraplate basaltic magmas or ocean-island basalts. Their initial Nd isotopic compositions display a range of depleted (εNd i = +2.9) to enriched (εNdi = -2.0) values that are negatively correlated with the degree of light rare-earth element enrichment. Two models for the origin of these dykes are evaluated. -from Authors",

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year = "1991",

doi = "10.1139/e91-003",

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Trace-element and Nd isotopic variations in early Proterozoic dyke swarms emplaced in the vicinity of the Kapuskasing structural zone: enriched mantle or assimilation and fractional crystallization (AFC) process? / Boily, M.; Ludden, J. N.
In: Canadian Journal of Earth Sciences, Vol. 28, No. 1, 1991, p. 26-36.

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

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T1 - Trace-element and Nd isotopic variations in early Proterozoic dyke swarms emplaced in the vicinity of the Kapuskasing structural zone

T2 - enriched mantle or assimilation and fractional crystallization (AFC) process?

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AU - Ludden, J. N.

PY - 1991

Y1 - 1991

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AB - Several Early Proterozoic Hearst-Matachewan (2.454 Ga), Kapuskasing (2.14 Ga), and Preissac (2.04 Ga) dykes were emplaced within the Archean crust surrounding the Kapuskasing structural zone (KSZ). The dykes are composed of moderately to highly fractionated tholeiitic basalts that exhibit trace-element characteristics similar to those of intraplate basaltic magmas or ocean-island basalts. Their initial Nd isotopic compositions display a range of depleted (εNd i = +2.9) to enriched (εNdi = -2.0) values that are negatively correlated with the degree of light rare-earth element enrichment. Two models for the origin of these dykes are evaluated. -from Authors

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Trace-element and Nd isotopic variations in early Proterozoic dyke swarms emplaced in the vicinity of the Kapuskasing structural zone: enriched mantle or assimilation and fractional crystallization (AFC) process?

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