Argon/Argon, micropaleontological and Uranium/Lead geochronological data for igneous and sedimentary rocks dredged during the VESPA scientific cruise
Abstract: The 2015 VESPA voyage (Volcanic Evolution of South Pacific Arcs) was a seismic and rock dredging expedition to the Loyalty and Three Kings ridges and South Fiji Basin. In this paper we present 33 Ar/Ar, 23 micropaleontological and two U/Pb ages for igneous and sedimentary rocks from 33 dredge sites at 25-28°S in this previously little-studied part of the southwest Pacific Ocean. Igneous rocks include basalts, dolerites, basaltic andesites, trachyandesites and a granite. Successful Ar/Ar dating of altered and/or low-K basalts was achieved through careful sample selection and processing, detailed petrographic and element mapping of groundmass, and incremental heating experiments on both phenocryst and groundmass separates to interpret the complex spectra produced by samples having multiple K reservoirs. The Ar/Ar ages of most of the sampled lavas, irrespective of composition, are latest Oligocene to earliest Miocene (25-22 Ma), but two are Eocene (39-36 Ma). The granite has a U/Pb zircon age of 23.6±0.3 Ma. Ar/Ar lava ages based on dating are corroborated by microfossil ages and by detrital U/Pb zircon dating of a sandstone. In a southwest Pacific regional context, the VESPA lavas are part of a >4000 km long disrupted western belt of Eocene to Miocene subduction-related volcanic rocks. The belt includes arc rocks in Northland New Zealand, Northland Plateau, Three Kings Ridge, and Loyalty Ridge and, more speculatively, D’Entrecasteaux Ridge, West Torres Plateau and Rennell Ridge. This western belt is the product of superimposed Eocene and Oligocene-Miocene remnant volcanic arcs that were stranded along the edge of Zealandia as still-active arcs migrated east with the Pacific trench. The eastern belt of Eocene-Miocene volcanic arcs is more tectonically disrupted and less well-sampled than the western belt. Overall Eocene-Miocene SW Pacific arc development is explained in terms of west-dipping subduction and southward propagating tectonics. Plain word summary: Samples of lava from the seabed between New Zealand and New Caledonia have been dated using atomic clocks and fossils. Most lavas erupted in a big pulse of volcanic activity between 25 and 22 million years ago. They are part of a >4000 km long belt of now-extinct undersea volcanoes that lie between New Zealand and the Solomon Islands, and which were related to early subduction of the Pacific Plate under the Australian Plate.
Important Note: This submission has been initially submitted to SEA
scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI.
The metadata elements have been further processed (refined) in EMODnet
Ingestion Service in order to conform with the Data Submission Service
specifications.
Identificatie
Versiedatum | 2022-08-01 |
---|---|
Type versiedatum | Creatie: Aanmaakdatum of opnamedatum van de dataset. |
Versiedatum | 2022-09-13 |
Type versiedatum | Wijziging: Datum van wijziging, controle, verbetering van dataset. |
Versiedatum | 2023-04-16 |
Type versiedatum | Publicatie: Uitgavedatum van de dataset. |
Type versiedatum | Publicatie: Uitgavedatum van de dataset. |
Dataset identificator | a53ad03f-3839-8393-3937-000000089740 |
Dataset identificator |
Inhoud
Contactgegevens dataset(serie)
Organisatie | SEA scieNtific Open data Edition |
---|---|
Adres | By address: IFREMER / IDM / SISMER - Scientific Information Systems for the SEA, IFREMER Centre de Bretagne, ZI Pointe du diable CS 10070 |
Plaats | PLOUZANE |
Postcode | 29280 |
Land | France |
data@seanoe.org | |
Connectiepunt URL | https://www.seanoe.org/ |
Rol | Publisher: Publisher |
Contactgegevens dataset(serie)
Organisatie | Ifremer, Scientific Information Systems for the sea |
---|---|
Adres | IFREMER Centre de Bretagne ZI Pointe du diable CS 10070 |
Plaats | PLOUZANE |
Postcode | 29280 |
Land | France |
sismer@ifremer.fr | |
Connectiepunt URL | http://data.ifremer.fr/SISMER |
Rol | Dataset Holding Organisation: Dataset Holding Organisation |
Contactgegevens dataset(serie)
Organisatie | Ifremer, Scientific Information Systems for the sea |
---|---|
Adres | IFREMER Centre de Bretagne ZI Pointe du diable CS 10070 |
Plaats | PLOUZANE |
Postcode | 29280 |
Land | France |
sismer@ifremer.fr | |
Connectiepunt URL | http://data.ifremer.fr/SISMER |
Rol | Auteur: Partij die auteur is van de data. |
Trefwoorden
GEMET - INSPIRE themes, version 1.0 | Oceanographic geographical features |
---|---|
SeaVoX salt and fresh water body gazetteer | Tasman Sea |
SeaDataNet Agreed Parameter Groups | inapplicable |
SeaDataNet device categories | rock dredges |
SeaDataNet Parameter Discovery Vocabulary | Rock age |
CRUISE SUMMARY REPORT INVENTORY (CSR) | 486_15001100 |
SeaVoX Platform Categories | research vessel |
MEDIN data format categories | Documents |
Karakterset | UTF-8: 8-bit variabele grootte universele karakterset, gebaseerd op ISO/IEC 10646 |
---|---|
Categorie(ën) |
Begrenzing
Omschrijving geografische begrenzing | |
---|---|
Identificator geografische begrenzing |
Begrenzing
Omschrijving geografische begrenzing | |||||||||
---|---|---|---|---|---|---|---|---|---|
Omschrijvende rechthoek
|
|||||||||
Identificator geografische begrenzing |
Referentiesysteem
Horizontaal en/of verticaal referentiesysteem
Naam | WGS 1984 |
---|
Kwaliteit
Niveau kwaliteitsinformatie | Dataset: Informatie heeft betrekking op de dataset. |
---|
Bewerkingen
Algemene beschrijving herkomst | Processed data,Quality controlled data,Raw data |
---|
Conformiteit
Domeinconsistentie
Resultaat
|
Domeinconsistentie
Resultaat
|
Domeinconsistentie
Resultaat
|
Toegangs- en gebruiksbeperkingen
Legale en veiligheidsbeperkingen
Beperkingen van de dataset(serie)
|
|||||||||||
Beperkingen van de dataset(serie)
|
Distributie
Overdracht
|
Meta-metadata
Metadata identificator (fileIdentifier) | a53ad03f-3839-8393-3937-000000089740 | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Taal metadatarecord | Engels | ||||||||||||||
Karakterset metadatarecord | UTF-8: 8-bit variabele grootte universele karakterset, gebaseerd op ISO/IEC 10646 | ||||||||||||||
Hiërarchisch niveau | Dataset: Informatie heeft betrekking op de dataset. | ||||||||||||||
Metadata wijzigingsdatum | 2025-03-13T00:00:00 | ||||||||||||||
Naam metadatastandaard | ISO 19115:2003/19139 | ||||||||||||||
Versie metadatastandaard | 1.0 | ||||||||||||||
Metadata-auteur
|