Pb isotope geochemistry of the Fen carbonatite complex, S.E. Norway: age and petrogenetic implications

Tom Andersen; Paul N. Taylor

doi:10.1016/0016-7037(88)90069-5

Pb isotope geochemistry of the Fen carbonatite complex, S.E. Norway: age and petrogenetic implications

Tom Andersen^*, Paul N. Taylor

^*Corresponding author for this work

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

34 Citations (Scopus)

Abstract

Eighteen samples of carbonatites and associated silicate rocks from the Fen complex, southeast Norway, define a whole-rock Pb/Pb isochron (MSWD 3.63) with an age of 539 ± 14 Ma and a single-stage model μ value of 8.15. The samples show an extreme range of ²⁰⁶Pb/²⁰⁴Pb from 18.9 to 226, which correlates with the abundance of apatite in the rocks. The isochron plots above the Pb isotope growth curve for depleted mantle, but a composite of local crustal rocks has a composition which coincides with the Fen isochron. These features are interpreted as evidence of significant crustal contamination taking place during differentiation of carbonatite magma in the middle to shallow crust.

Original language	English
Pages (from-to)	209-215
Number of pages	7
Journal	Geochimica et Cosmochimica Acta
Volume	52
Issue number	1
DOIs	https://doi.org/10.1016/0016-7037(88)90069-5
Publication status	Published - 1988

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title = "Pb isotope geochemistry of the Fen carbonatite complex, S.E. Norway: age and petrogenetic implications",

abstract = "Eighteen samples of carbonatites and associated silicate rocks from the Fen complex, southeast Norway, define a whole-rock Pb/Pb isochron (MSWD 3.63) with an age of 539 ± 14 Ma and a single-stage model μ value of 8.15. The samples show an extreme range of 206Pb/204Pb from 18.9 to 226, which correlates with the abundance of apatite in the rocks. The isochron plots above the Pb isotope growth curve for depleted mantle, but a composite of local crustal rocks has a composition which coincides with the Fen isochron. These features are interpreted as evidence of significant crustal contamination taking place during differentiation of carbonatite magma in the middle to shallow crust.",

author = "Tom Andersen and Taylor, \{Paul N.\}",

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T1 - Pb isotope geochemistry of the Fen carbonatite complex, S.E. Norway

T2 - age and petrogenetic implications

AU - Andersen, Tom

AU - Taylor, Paul N.

PY - 1988

Y1 - 1988

N2 - Eighteen samples of carbonatites and associated silicate rocks from the Fen complex, southeast Norway, define a whole-rock Pb/Pb isochron (MSWD 3.63) with an age of 539 ± 14 Ma and a single-stage model μ value of 8.15. The samples show an extreme range of 206Pb/204Pb from 18.9 to 226, which correlates with the abundance of apatite in the rocks. The isochron plots above the Pb isotope growth curve for depleted mantle, but a composite of local crustal rocks has a composition which coincides with the Fen isochron. These features are interpreted as evidence of significant crustal contamination taking place during differentiation of carbonatite magma in the middle to shallow crust.

AB - Eighteen samples of carbonatites and associated silicate rocks from the Fen complex, southeast Norway, define a whole-rock Pb/Pb isochron (MSWD 3.63) with an age of 539 ± 14 Ma and a single-stage model μ value of 8.15. The samples show an extreme range of 206Pb/204Pb from 18.9 to 226, which correlates with the abundance of apatite in the rocks. The isochron plots above the Pb isotope growth curve for depleted mantle, but a composite of local crustal rocks has a composition which coincides with the Fen isochron. These features are interpreted as evidence of significant crustal contamination taking place during differentiation of carbonatite magma in the middle to shallow crust.

UR - https://www.scopus.com/pages/publications/0023736041

U2 - 10.1016/0016-7037(88)90069-5

DO - 10.1016/0016-7037(88)90069-5

M3 - Article

AN - SCOPUS:0023736041

SN - 0016-7037

VL - 52

SP - 209

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JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

IS - 1

ER -

Pb isotope geochemistry of the Fen carbonatite complex, S.E. Norway: age and petrogenetic implications

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