Magmatism during Gondwana break-up: New geochronological data from Westland, New Zealand

Q. H.A. Van Der Meer; J. M. Scott; T. E. Waight; M. Sudo; A. Scherstén; A. F. Cooper; T. L. Spell

doi:10.1080/00288306.2013.826699

Magmatism during Gondwana break-up: New geochronological data from Westland, New Zealand

Q. H.A. Van Der Meer
, J. M. Scott
, T. E. Waight
, M. Sudo
, A. Scherstén
, A. F. Cooper
, T. L. Spell

Science Institute

University of Iceland

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

Abstract

Newly determined Late Cretaceous ⁴⁰Ar/³⁹Ar ages on megacrystic kaersutite from four lamprophyre dikes, and a U-Pb zircon age on a trachyte, from central and north Westland (New Zealand) are presented. These ages suggest that the intrusion of mafic dikes (88-86 and 69 Ma) was not necessarily restricted to the previously established narrow age range of 80-92 Ma. The younger lamprophyre and trachyte dikes (c. 68-70 Ma) imply that tensional stresses in the Western Province were either renewed at this time, or that extension and related magmatism continued during opening of the Tasman Sea. Extension-related magmatism in the region not only preceded Tasman seafloor spreading initiation (starting at c. 83 Ma, lasting to c. 53 Ma), but may have sporadically continued for up to 15 Ma after continental break-up.

Original language	English
Pages (from-to)	229-242
Number of pages	14
Journal	New Zealand Journal of Geology and Geophysics
Volume	56
Issue number	4
DOIs	https://doi.org/10.1080/00288306.2013.826699
Publication status	Published - 1 Dec 2013

Bibliographical note

Funding Information: Two anonymous reviewers are thanked for their review of the manuscript. Matthew Leybourne is thanked for comments and efficient and involved editorial handling. Andy Tulloch is thanked for constructive discussion and help in constructing Table 5. Joseph Kula is thanked for assistance in data interpretation. JMS acknowledges financial support from FRST contract UOX1004. The Danish Research Council for Nature and Universe is acknowledged for their support to TEW and QHAVDM (grant no. 10-085245).

Other keywords

Central Westland
Fraser Complex
Geochronology
Gondwana break-up
Lamprophyre

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10.1080/00288306.2013.826699

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title = "Magmatism during Gondwana break-up: New geochronological data from Westland, New Zealand",

abstract = "Newly determined Late Cretaceous 40Ar/39Ar ages on megacrystic kaersutite from four lamprophyre dikes, and a U-Pb zircon age on a trachyte, from central and north Westland (New Zealand) are presented. These ages suggest that the intrusion of mafic dikes (88-86 and 69 Ma) was not necessarily restricted to the previously established narrow age range of 80-92 Ma. The younger lamprophyre and trachyte dikes (c. 68-70 Ma) imply that tensional stresses in the Western Province were either renewed at this time, or that extension and related magmatism continued during opening of the Tasman Sea. Extension-related magmatism in the region not only preceded Tasman seafloor spreading initiation (starting at c. 83 Ma, lasting to c. 53 Ma), but may have sporadically continued for up to 15 Ma after continental break-up.",

keywords = "Central Westland, Fraser Complex, Geochronology, Gondwana break-up, Lamprophyre",

author = "\{Van Der Meer\}, \{Q. H.A.\} and Scott, \{J. M.\} and Waight, \{T. E.\} and M. Sudo and A. Scherst{\'e}n and Cooper, \{A. F.\} and Spell, \{T. L.\}",

note = "Funding Information: Two anonymous reviewers are thanked for their review of the manuscript. Matthew Leybourne is thanked for comments and efficient and involved editorial handling. Andy Tulloch is thanked for constructive discussion and help in constructing Table 5. Joseph Kula is thanked for assistance in data interpretation. JMS acknowledges financial support from FRST contract UOX1004. The Danish Research Council for Nature and Universe is acknowledged for their support to TEW and QHAVDM (grant no. 10-085245).",

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doi = "10.1080/00288306.2013.826699",

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TY - JOUR

T1 - Magmatism during Gondwana break-up

T2 - New geochronological data from Westland, New Zealand

AU - Van Der Meer, Q. H.A.

AU - Scott, J. M.

AU - Waight, T. E.

AU - Sudo, M.

AU - Scherstén, A.

AU - Cooper, A. F.

AU - Spell, T. L.

N1 - Funding Information: Two anonymous reviewers are thanked for their review of the manuscript. Matthew Leybourne is thanked for comments and efficient and involved editorial handling. Andy Tulloch is thanked for constructive discussion and help in constructing Table 5. Joseph Kula is thanked for assistance in data interpretation. JMS acknowledges financial support from FRST contract UOX1004. The Danish Research Council for Nature and Universe is acknowledged for their support to TEW and QHAVDM (grant no. 10-085245).

PY - 2013/12/1

Y1 - 2013/12/1

N2 - Newly determined Late Cretaceous 40Ar/39Ar ages on megacrystic kaersutite from four lamprophyre dikes, and a U-Pb zircon age on a trachyte, from central and north Westland (New Zealand) are presented. These ages suggest that the intrusion of mafic dikes (88-86 and 69 Ma) was not necessarily restricted to the previously established narrow age range of 80-92 Ma. The younger lamprophyre and trachyte dikes (c. 68-70 Ma) imply that tensional stresses in the Western Province were either renewed at this time, or that extension and related magmatism continued during opening of the Tasman Sea. Extension-related magmatism in the region not only preceded Tasman seafloor spreading initiation (starting at c. 83 Ma, lasting to c. 53 Ma), but may have sporadically continued for up to 15 Ma after continental break-up.

AB - Newly determined Late Cretaceous 40Ar/39Ar ages on megacrystic kaersutite from four lamprophyre dikes, and a U-Pb zircon age on a trachyte, from central and north Westland (New Zealand) are presented. These ages suggest that the intrusion of mafic dikes (88-86 and 69 Ma) was not necessarily restricted to the previously established narrow age range of 80-92 Ma. The younger lamprophyre and trachyte dikes (c. 68-70 Ma) imply that tensional stresses in the Western Province were either renewed at this time, or that extension and related magmatism continued during opening of the Tasman Sea. Extension-related magmatism in the region not only preceded Tasman seafloor spreading initiation (starting at c. 83 Ma, lasting to c. 53 Ma), but may have sporadically continued for up to 15 Ma after continental break-up.

KW - Central Westland

KW - Fraser Complex

KW - Geochronology

KW - Gondwana break-up

KW - Lamprophyre

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DO - 10.1080/00288306.2013.826699

M3 - Article

SN - 0028-8306

VL - 56

SP - 229

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JO - New Zealand Journal of Geology and Geophysics

JF - New Zealand Journal of Geology and Geophysics

IS - 4

ER -

Magmatism during Gondwana break-up: New geochronological data from Westland, New Zealand

Abstract

Bibliographical note

Other keywords

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