TY - JOUR

T1 - Foulwind Suite magmatism in the Buller Terrane, New Zealand

T2 - geochemistry of the Carboniferous Foulwind and Windy Point Granites

AU - Waight, Tod

AU - Malloch, Kirstine

AU - Weaver, Steve

AU - Ireland, Trevor

AU - Muir, Roddy

PY - 2022

Y1 - 2022

N2 - The peraluminous Foulwind and Windy Point Granites are important components of the Foulwind Suite - a diverse group of high field strength element-enriched Carboniferous granitoids in New Zealand's Western Province. Four phases are identified in the Foulwind Granite (Seal Point, Siberia Bay, Tauranga Bay, Lighthouse). A new age of 324.0 +/- 4.1 Ma has been obtained for the relatively undeformed Siberia Bay phase. The rocks are generally enriched in high-field strength elements and the Tauranga Bay and Lighthouse phases can be classified as ferroan A-type granites, whereas classification of the other phases is ambiguous. Sr isotope compositions were disturbed by the formation of the Paparoa Metamorphic Core Complex. Nd isotopes vary considerably and indicate involvement of multiple sources. The Nd isotope and A-type signatures can be explained by melting of mid-Paleozoic I-type granites with variable involvement of Greenland Group metasediments. The tectonic setting of the Foulwind Suite is unclear, but may be related to processes subsequent to the generation of voluminous mid-Paleozoic granitoids and amalgamation of the Buller and Takaka Terranes.

AB - The peraluminous Foulwind and Windy Point Granites are important components of the Foulwind Suite - a diverse group of high field strength element-enriched Carboniferous granitoids in New Zealand's Western Province. Four phases are identified in the Foulwind Granite (Seal Point, Siberia Bay, Tauranga Bay, Lighthouse). A new age of 324.0 +/- 4.1 Ma has been obtained for the relatively undeformed Siberia Bay phase. The rocks are generally enriched in high-field strength elements and the Tauranga Bay and Lighthouse phases can be classified as ferroan A-type granites, whereas classification of the other phases is ambiguous. Sr isotope compositions were disturbed by the formation of the Paparoa Metamorphic Core Complex. Nd isotopes vary considerably and indicate involvement of multiple sources. The Nd isotope and A-type signatures can be explained by melting of mid-Paleozoic I-type granites with variable involvement of Greenland Group metasediments. The tectonic setting of the Foulwind Suite is unclear, but may be related to processes subsequent to the generation of voluminous mid-Paleozoic granitoids and amalgamation of the Buller and Takaka Terranes.

KW - Granite

KW - Paleozoic

KW - Carboniferous

KW - Buller Terrane

KW - Foulwind

KW - A-type

KW - geochronology

KW - geochemistry

KW - A-TYPE GRANITES

KW - METAMORPHIC CORE COMPLEX

KW - LACHLAN FOLD BELT

KW - NEW-ENGLAND BATHOLITH

KW - U-PB GEOCHRONOLOGY

KW - SOUTH-ISLAND

KW - GONDWANA MARGIN

KW - ZIRCON GEOCHRONOLOGY

KW - PALEOZOIC TERRANES

KW - EASTERN AUSTRALIA

U2 - 10.1080/00288306.2021.1960569

DO - 10.1080/00288306.2021.1960569

M3 - Journal article

VL - 65

SP - 470

EP - 490

JO - New Zealand Journal of Geology, and Geophysics

JF - New Zealand Journal of Geology, and Geophysics

SN - 0028-8306

IS - 3

ER -