Reconnaissance Basement Geology and Tectonics of North Zealandia

Institut for Geovidenskab og Naturforvaltning

Reconnaissance Basement Geology and Tectonics of North Zealandia

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Standard

Reconnaissance Basement Geology and Tectonics of North Zealandia. / Mortimer, Nick; Williams, Simon; Seton, Maria; Calvert, Andy; Waight, Tod; Turnbull, Rose; Nelson, Demian; Palin, Mike; Ramezani, Jahandar; Sagar, Matthew W.; Tulloch, Andy; Stratford, Wanda; Collot, Julien; Etienne, Samuel.

I: Tectonics, Bind 42, Nr. 10, e2023TC007961, 2023.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Mortimer, N, Williams, S, Seton, M, Calvert, A, Waight, T, Turnbull, R, Nelson, D, Palin, M, Ramezani, J, Sagar, MW, Tulloch, A, Stratford, W, Collot, J & Etienne, S 2023, 'Reconnaissance Basement Geology and Tectonics of North Zealandia', Tectonics, bind 42, nr. 10, e2023TC007961. https://doi.org/10.1029/2023TC007961

APA

Mortimer, N., Williams, S., Seton, M., Calvert, A., Waight, T., Turnbull, R., Nelson, D., Palin, M., Ramezani, J., Sagar, M. W., Tulloch, A., Stratford, W., Collot, J., & Etienne, S. (2023). Reconnaissance Basement Geology and Tectonics of North Zealandia. Tectonics, 42(10), [e2023TC007961]. https://doi.org/10.1029/2023TC007961

Vancouver

Mortimer N, Williams S, Seton M, Calvert A, Waight T, Turnbull R o.a. Reconnaissance Basement Geology and Tectonics of North Zealandia. Tectonics. 2023;42(10). e2023TC007961. https://doi.org/10.1029/2023TC007961

Author

Mortimer, Nick ; Williams, Simon ; Seton, Maria ; Calvert, Andy ; Waight, Tod ; Turnbull, Rose ; Nelson, Demian ; Palin, Mike ; Ramezani, Jahandar ; Sagar, Matthew W. ; Tulloch, Andy ; Stratford, Wanda ; Collot, Julien ; Etienne, Samuel. / Reconnaissance Basement Geology and Tectonics of North Zealandia. I: Tectonics. 2023 ; Bind 42, Nr. 10.

Bibtex

@article{2ee7bda378784ebf99dc15bbffc6b1d6,

title = "Reconnaissance Basement Geology and Tectonics of North Zealandia",

abstract = "New rock dredge samples supply key information to establish the tectonic and geological framework of the northern two-thirds of the 95% submerged Zealandia continent. The R/V Investigator voyage IN2016T01 to the Fairway Ridge, Coral Sea, obtained poorly sorted poly-lithologic pebbly to cobbly sandstones, well sorted fine grained sandstones, mudstones, bioclastic limestones, and basaltic lavas. Post-cruise analytical work comprised petrography, whole rock geochemical and Sr and Nd isotopic analyses, and U-Pb zircon, Rb-Sr, and Ar-Ar geochronology. A Fairway Ridge cobbly sandstone has a ∼95 Ma (early Late Cretaceous) depositional age; two biotite granite cobbles are 111 ± 1 and 128 ± 1 Ma in age, and some volcanic pebbles are also likely Early Cretaceous. Fairway Ridge basalts have intraplate alkaline chemistry and are of Late Eocene age (∼40–36 Ma). By analogy with South Zealandia, we interpret strong positive continental magnetic anomalies of North Zealandia to mainly result from Late Cretaceous to Cenozoic intraplate basalts, many of them rift-related lavas. A new basement geological map of North Zealandia shows the position of the Mesozoic Gondwana magmatic arc axis (Median Batholith) and other major geological units. This study completes onland and offshore reconnaissance geological mapping of the entire 5 Mkm2 Zealandia continent.",

keywords = "Ar-Ar dating, Fairway Ridge, geochemistry, geological mapping, Gondwana, igneous rocks, New Caledonia, New Zealand, petrology, Rb-Sr dating, sedimentary rocks, tectonics, Zealandia, zircon U-Pb dating",

author = "Nick Mortimer and Simon Williams and Maria Seton and Andy Calvert and Tod Waight and Rose Turnbull and Demian Nelson and Mike Palin and Jahandar Ramezani and Sagar, {Matthew W.} and Andy Tulloch and Wanda Stratford and Julien Collot and Samuel Etienne",

year = "2023",

doi = "10.1029/2023TC007961",

language = "English",

volume = "42",

journal = "Tectonics",

issn = "0278-7407",

publisher = "Wiley-Blackwell",

number = "10",

}

RIS

TY - JOUR

T1 - Reconnaissance Basement Geology and Tectonics of North Zealandia

AU - Mortimer, Nick

AU - Williams, Simon

AU - Seton, Maria

AU - Calvert, Andy

AU - Waight, Tod

AU - Turnbull, Rose

AU - Nelson, Demian

AU - Palin, Mike

AU - Ramezani, Jahandar

AU - Sagar, Matthew W.

AU - Tulloch, Andy

AU - Stratford, Wanda

AU - Collot, Julien

AU - Etienne, Samuel

PY - 2023

Y1 - 2023

N2 - New rock dredge samples supply key information to establish the tectonic and geological framework of the northern two-thirds of the 95% submerged Zealandia continent. The R/V Investigator voyage IN2016T01 to the Fairway Ridge, Coral Sea, obtained poorly sorted poly-lithologic pebbly to cobbly sandstones, well sorted fine grained sandstones, mudstones, bioclastic limestones, and basaltic lavas. Post-cruise analytical work comprised petrography, whole rock geochemical and Sr and Nd isotopic analyses, and U-Pb zircon, Rb-Sr, and Ar-Ar geochronology. A Fairway Ridge cobbly sandstone has a ∼95 Ma (early Late Cretaceous) depositional age; two biotite granite cobbles are 111 ± 1 and 128 ± 1 Ma in age, and some volcanic pebbles are also likely Early Cretaceous. Fairway Ridge basalts have intraplate alkaline chemistry and are of Late Eocene age (∼40–36 Ma). By analogy with South Zealandia, we interpret strong positive continental magnetic anomalies of North Zealandia to mainly result from Late Cretaceous to Cenozoic intraplate basalts, many of them rift-related lavas. A new basement geological map of North Zealandia shows the position of the Mesozoic Gondwana magmatic arc axis (Median Batholith) and other major geological units. This study completes onland and offshore reconnaissance geological mapping of the entire 5 Mkm2 Zealandia continent.

AB - New rock dredge samples supply key information to establish the tectonic and geological framework of the northern two-thirds of the 95% submerged Zealandia continent. The R/V Investigator voyage IN2016T01 to the Fairway Ridge, Coral Sea, obtained poorly sorted poly-lithologic pebbly to cobbly sandstones, well sorted fine grained sandstones, mudstones, bioclastic limestones, and basaltic lavas. Post-cruise analytical work comprised petrography, whole rock geochemical and Sr and Nd isotopic analyses, and U-Pb zircon, Rb-Sr, and Ar-Ar geochronology. A Fairway Ridge cobbly sandstone has a ∼95 Ma (early Late Cretaceous) depositional age; two biotite granite cobbles are 111 ± 1 and 128 ± 1 Ma in age, and some volcanic pebbles are also likely Early Cretaceous. Fairway Ridge basalts have intraplate alkaline chemistry and are of Late Eocene age (∼40–36 Ma). By analogy with South Zealandia, we interpret strong positive continental magnetic anomalies of North Zealandia to mainly result from Late Cretaceous to Cenozoic intraplate basalts, many of them rift-related lavas. A new basement geological map of North Zealandia shows the position of the Mesozoic Gondwana magmatic arc axis (Median Batholith) and other major geological units. This study completes onland and offshore reconnaissance geological mapping of the entire 5 Mkm2 Zealandia continent.

KW - Ar-Ar dating

KW - Fairway Ridge

KW - geochemistry

KW - geological mapping

KW - Gondwana

KW - igneous rocks

KW - New Caledonia

KW - New Zealand

KW - petrology

KW - Rb-Sr dating

KW - sedimentary rocks

KW - tectonics

KW - Zealandia

KW - zircon U-Pb dating

U2 - 10.1029/2023TC007961

DO - 10.1029/2023TC007961

M3 - Journal article

AN - SCOPUS:85173618924

VL - 42

JO - Tectonics

JF - Tectonics

SN - 0278-7407

IS - 10

M1 - e2023TC007961

ER -

ID: 370488151