(Table DR1) Trace element contents in basalts from ODP Hole 33-317A ...

Numerous large igneous provinces formed in the Pacific Ocean during Early Cretaceous time, but their origins and relations are poorly understood. We present new geochronological and geochemical data on rocks from the Manihiki Plateau and compare these results to those for other Cretaceous Pacific pl...

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Bibliographic Details
Main Authors: Ingle, Stephanie, Mahoney, John J, Sato, Hiroshi, Coffin, Millard F, Kimura, Jun-Ichi, Hirano, Naoto, Nakanishi, Masao
Format: Dataset
Language:English
Published: PANGAEA 2007
Subjects:
Sample code/label
Rubidium
Strontium
Yttrium
Zirconium
Niobium
Caesium
Barium
Lanthanum
Cerium
Praseodymium
Neodymium
Samarium
Europium
Gadolinium
Terbium
Dysprosium
Holmium
Erbium
Thulium
Ytterbium
Lutetium
Hafnium
Thorium
Uranium
Drilling/drill rig
DSDP/ODP/IODP sample designation
Thermal-ionization multicollector mass spectrometer VG Sector
Leg33
Glomar Challenger
Deep Sea Drilling Project DSDP
Danger Islands
Pacific
Plateau Central
Online Access:https://dx.doi.org/10.1594/pangaea.721831
https://doi.pangaea.de/10.1594/PANGAEA.721831
Description
Summary:Numerous large igneous provinces formed in the Pacific Ocean during Early Cretaceous time, but their origins and relations are poorly understood. We present new geochronological and geochemical data on rocks from the Manihiki Plateau and compare these results to those for other Cretaceous Pacific plateaus. A dredged Manihiki basalt gives an 40Ar-39Ar age of 117.9+/-3.5 Ma (2 sigma), essentially contemporaneous with the Ontong Java Plateau ~2500 km to the west, and the possibly related Hikurangi Plateau ~3000 km to the south. Drilled Manihiki lavas are tholeiitic with incompatible trace element abundances similar to those of Ontong Java basalts. These lavas may result from high degrees of partial melting during the main eruptive phase of plateau formation. There are two categories of dredged lavas from the Danger Islands Troughs, which bisect the plateau. The first is alkalic lavas having strong enrichments in light rare earth and large-ion lithophile elements; these lavas may represent late-stage activity, ... : Supplement to: Ingle, Stephanie; Mahoney, John J; Sato, Hiroshi; Coffin, Millard F; Kimura, Jun-Ichi; Hirano, Naoto; Nakanishi, Masao (2007): Depleted mantle wedge and sediment fingerprint in unusual basalts from the Manihiki Plateau, central Pacific Ocean. Geology 2007 35(7), 35(7), 595-598 ...

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