TY - JOUR
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 - http://www.scopus.com/inward/record.url?scp=0023736041&partnerID=8YFLogxK
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
EP - 215
JO - Geochimica et Cosmochimica Acta
JF - Geochimica et Cosmochimica Acta
IS - 1
ER -