On the magnetostratigraphic age of Nauru Basin basalts of the western Pacific Ocean and timing of Ontong Java volcanism

Doubrovine, Pavel V.; Tarduno, J. A.; Zhao, Xianzheng

doi:10.1016/j.epsl.2009.07.040

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…We note that the assumption that the formation of ∼120‐Ma‐old Ontong Java, Manihiki and Hikurangi plateaus [ Taylor , 2006] was related to the arrival of the Louisville plume head underneath the lithosphere of the paleo‐Pacific ocean is questionable because the older segment of the Louisville track has been subducted beneath the Tonga trench. Although we could not rule out a younger age of the hot spot (between 120 and 80 Ma), we preferred to keep the 120 Ma assignment because of a possible temporal association with the widespread Aptian pulse of volcanic activity in the western Pacific, traditionally attributed to a mantle plume (see Doubrovine et al [2009] and references therein for discussion). A recent study of Chandler et al [2012]showed that the reconstructions of the Ontong Java‐Manihiki‐Hikurangi LIP using the hot spot reference frames of O'Neill et al [2005], Wessel and Kroenke [2008] (WK08‐A) and a modification of the latter (WK08‐D), which allowed motion of the Hawaiian hot spot during the formation of the Emperor seamounts (83.5–47 Ma), consistently placed the igneous province 8° to 19° north to northeast of the recent position of the Louisville hot spot.…”

Section: Building Blocks Of a Moving Hot Spot Reference Framementioning

confidence: 99%

Absolute plate motions in a reference frame defined by moving hot spots in the Pacific, Atlantic, and Indian oceans

Doubrovine¹,

Steinberger²,

Torsvik³

2012

J. Geophys. Res.

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[1] We defined a new global moving hot spot reference frame (GMHRF), using a comprehensive set of radiometric dates from arguably the best-studied hot spot tracks, refined plate circuit reconstructions, a new plate polygon model, and an iterative approach for estimating hot spot motions from numerical models of whole mantle convection and advection of plume conduits in the mantle flow that ensures their consistency with surface plate motions. Our results show that with the appropriate choice of a chain of relative motion linking the Pacific plate to the plates of the Indo-Atlantic hemisphere, the observed geometries and ages of the Pacific and Indo-Atlantic hot spot tracks were accurately reproduced by a combination of absolute plate motion and hot spot drift back to the Late Cretaceous ($80 Ma). Similarly good fits were observed for Indo-Atlantic tracks for earlier time (to $130 Ma). In contrast, attempts to define a fixed hot spot frame resulted in unacceptable misfits for the Late Cretaceous to Paleogene (80-50 Ma), highlighting the significance of relative motion between the Pacific and Indo-Atlantic hot spots during this period. A comparison of absolute reconstructions using the GMHRF and the most recent global paleomagnetic frame reveals substantial amounts of true polar wander at rates varying between $0.1 /Ma and 1 /Ma. Two intriguing, nearly equal and antipodal rotations of the Earth relative to its spin axis are suggested for the 90-60 Ma and 60-40 Ma intervals ($9 at a 0.3-0.5 /Ma rate); these predictions have yet to be tested by geodynamic models.Citation: Doubrovine, P. V., B. Steinberger, and T. H. Torsvik (2012), Absolute plate motions in a reference frame defined by moving hot spots in the

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Section: Building Blocks Of a Moving Hot Spot Reference Framementioning

confidence: 99%

Absolute plate motions in a reference frame defined by moving hot spots in the Pacific, Atlantic, and Indian oceans

Doubrovine¹,

Steinberger²,

Torsvik³

2012

J. Geophys. Res.

Self Cite

318

559

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“…Contrary to this, Fitton et al [2004] suggest that the Early Aptian phase was principally responsible for the formation of the Ontong‐Java Plateau at ∼120 Ma and that only minor volcanism occurred ∼90 Ma. This hypothesis supported by the recent drilling results of Doubrovine et al [2009] who conclude that no volumetrically important second phase of magmatism took place. It has also been suggested that the Louisville hot spot may have been responsible for the production of the Ontong‐Java Plateau and surrounding basaltic provinces [e.g., Richards et al , 1991; Antretter et al , 2004].…”

Section: Oceanic Plateausmentioning

confidence: 99%

Deep crustal structure beneath large igneous provinces and the petrologic evolution of flood basalts

Ridley

Richards

2010

Geochem Geophys Geosyst

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[1] We present a review of seismological constraints on deep crustal structures underlying large igneous provinces (LIPs), largely from wide-angle seismic refraction surveys. The main purpose of this review is to ascertain whether this seismic evidence is consistent with, or contrary to, petrological models for the genesis of flood basalt lavas. Where high-quality data are available beneath continental flood basalt (CFB) provinces (Emeishan, Columbia River, Deccan, Siberia), high-velocity structures (V p ∼ 6.9-7.5 km/sec) are typically found immediately overlying the Moho in layers of order ∼5-15 km thick. Oceanic plateau (OP) LIPs exhibit similar layers, with a conspicuous layer of very high crustal velocity (V p ∼ 7.7 km/sec) beneath the enormous Ontong-Java plateau. These structures are similar to inferred ultramafic underplating structures seen beneath active hot spots such as Hawaii, the Marquesas, and La Reunion. Petrogenetic models for flood basalt volcanism based on hot plume melting beneath mature lithosphere suggest that these deep seismic structures may consist in large part of cumulate bodies of olivine and clinopyroxene which result from ponding and deep-crustal fractionation of ultramafic primary melts. Such fractionation is necessary to produce basalts with typical MgO contents of ∼6-8%, as observed for the vast bulk of observed flood basalts, from primary melts with MgO contents of order ∼15-18% (or greater) such as result from hot, deep melting beneath the lithosphere. The volumes of cumulate bodies and ultramafic intrusions in the lowermost crust, often described in the literature as "underplating," are comparable to those of the overlying basaltic formations, also consistent with petrological models. Further definition of the deep seismic structure beneath such prominent LIPs as the Ontong-Java Plateau could place better constraints on flood basalt petrogenesis by determining the relative volumes of ultramafic bodies and basaltic lavas, thereby better constraining the overall process of LIP emplacement.

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Quantifying the Contribution of Modern Asian Dust to the Southern Yap Trench and its Southeastern Region

Guo,

Zhao,

Zhang

et al. 2024

Preprint

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On the magnetostratigraphic age of Nauru Basin basalts of the western Pacific Ocean and timing of Ontong Java volcanism

Cited by 3 publications

References 35 publications

Absolute plate motions in a reference frame defined by moving hot spots in the Pacific, Atlantic, and Indian oceans

Absolute plate motions in a reference frame defined by moving hot spots in the Pacific, Atlantic, and Indian oceans

Deep crustal structure beneath large igneous provinces and the petrologic evolution of flood basalts

Quantifying the Contribution of Modern Asian Dust to the Southern Yap Trench and its Southeastern Region

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