No zircon U-Pb evidence for a Precambrian component in the Late Eocene Yavuna trondhjemite, Fiji

M. J. Rickard; I. S. Williams

doi:10.1080/08120099.2013.792295

No zircon U-Pb evidence for a Precambrian component in the Late Eocene Yavuna trondhjemite, Fiji

M. J. Rickard, I. S. Williams

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7 Citations (Scopus)

Abstract

It has been speculated, based on zircon Pb-α dating in the late 1950s, that the Yavuna stock on Viti Levu, Fiji, might contain pre-magmatic inherited components of Paleozoic or Neoproterozoic age. SIMS U-Pb isotopic analyses of nearly 50 zircon grains from a sample of the Yavuna trondhjemite have produced no evidence to support this suggestion. Although the analysed zircon grains do contain older cores, they are only 2.2 ± 0.3 Ma older than the 36.4 ± 0.6 Ma zircon rims that record emplacement of the trondhjemite magma in the Late Eocene.

Original language	English
Pages (from-to)	521-525
Number of pages	5
Journal	Australian Journal of Earth Sciences
Volume	60
Issue number	4
DOIs	https://doi.org/10.1080/08120099.2013.792295
Publication status	Published - Jun 2013

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title = "No zircon U-Pb evidence for a Precambrian component in the Late Eocene Yavuna trondhjemite, Fiji",

abstract = "It has been speculated, based on zircon Pb-α dating in the late 1950s, that the Yavuna stock on Viti Levu, Fiji, might contain pre-magmatic inherited components of Paleozoic or Neoproterozoic age. SIMS U-Pb isotopic analyses of nearly 50 zircon grains from a sample of the Yavuna trondhjemite have produced no evidence to support this suggestion. Although the analysed zircon grains do contain older cores, they are only 2.2 ± 0.3 Ma older than the 36.4 ± 0.6 Ma zircon rims that record emplacement of the trondhjemite magma in the Late Eocene.",

keywords = "Fiji, SIMS, U-Pb age, Viti Levu, Yavuna, trondhjemite, zircon",

author = "Rickard, {M. J.} and Williams, {I. S.}",

year = "2013",

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doi = "10.1080/08120099.2013.792295",

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T1 - No zircon U-Pb evidence for a Precambrian component in the Late Eocene Yavuna trondhjemite, Fiji

AU - Rickard, M. J.

AU - Williams, I. S.

PY - 2013/6

Y1 - 2013/6

N2 - It has been speculated, based on zircon Pb-α dating in the late 1950s, that the Yavuna stock on Viti Levu, Fiji, might contain pre-magmatic inherited components of Paleozoic or Neoproterozoic age. SIMS U-Pb isotopic analyses of nearly 50 zircon grains from a sample of the Yavuna trondhjemite have produced no evidence to support this suggestion. Although the analysed zircon grains do contain older cores, they are only 2.2 ± 0.3 Ma older than the 36.4 ± 0.6 Ma zircon rims that record emplacement of the trondhjemite magma in the Late Eocene.

AB - It has been speculated, based on zircon Pb-α dating in the late 1950s, that the Yavuna stock on Viti Levu, Fiji, might contain pre-magmatic inherited components of Paleozoic or Neoproterozoic age. SIMS U-Pb isotopic analyses of nearly 50 zircon grains from a sample of the Yavuna trondhjemite have produced no evidence to support this suggestion. Although the analysed zircon grains do contain older cores, they are only 2.2 ± 0.3 Ma older than the 36.4 ± 0.6 Ma zircon rims that record emplacement of the trondhjemite magma in the Late Eocene.

KW - Fiji

KW - SIMS

KW - U-Pb age

KW - Viti Levu

KW - Yavuna

KW - trondhjemite

KW - zircon

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DO - 10.1080/08120099.2013.792295

M3 - Article

SN - 0812-0099

VL - 60

SP - 521

EP - 525

JO - Australian Journal of Earth Sciences

JF - Australian Journal of Earth Sciences

IS - 4

ER -

No zircon U-Pb evidence for a Precambrian component in the Late Eocene Yavuna trondhjemite, Fiji

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