Interrelation of the stagnant slab, Ontong Java Plateau, and intraplate volcanism as inferred from seismic tomography

Obayashi, Masayuki; Yoshimitsu, Junko; Suetsugu, Daisuke; Shiobara, Hajime; Sugioka, Hiroko; Ito, Aki; Isse, Takehi; Ishihara, Yasushi; Tanaka, Satoru; Tonegawa, Takashi

doi:10.1038/s41598-021-99833-5

Cited by 9 publications

(2 citation statements)

References 51 publications

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“…The second real data application is to waveforms from an OBS station in a broadband OBS array on the Ontong Java Plateau (Figure S10 in Supporting Information S1; OJP array, Suetsugu et al, 2022) that was deployed to study the plume-related mantle structure in the region (e.g., Isse et al, 2021;Obayashi et al, 2021). Tonegawa et al (2019) studied the sediment structure by assuming a single sediment layer with a P-wave velocity of 2.7 km/s.…”

Section: Comparison With a Receiver Function Studymentioning

confidence: 99%

Characterizing the Seafloor Sediment Layer Using Teleseismic Body Waves Recorded by Ocean Bottom Seismometers

Kim,

Kawakatsu,

Akuhara

et al. 2023

JGR Solid Earth

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This study presents an approach to better characterize the P‐wave and S‐wave velocity structure of the seafloor sediment layer using ocean bottom seismometers. The presence of low‐velocity seafloor sediment layers influences the observed seismic record at the seafloor over a broad frequency range, such that detailed knowledge of this sediment structure is essential to predict its effect on teleseismic records. We use the radial component of teleseismic P waves and autocorrelation functions of the radial, vertical, and pressure components of teleseismic P and S waves to obtain sediment layer models using the Markov chain Monte Carlo approach with parallel tempering. Synthetic tests show that the body waves constrain the P‐ and S‐wave impedances and travel times and the P‐ to S‐wave velocity ratio of the sediment layers. The proposed method resolves thin layers at a high resolution, including the uppermost thin (∼50 m to a few hundred meters) low S‐wave velocity layer. Real data applications at sites across the Pacific Ocean that are coincident with previous in situ studies demonstrate the effectiveness of this method in characterizing the seafloor sediment unit. The sediment models characterized by this new approach will allow us to more accurately predict and correct the effects of sediment layers in generating P‐ and S‐wave reverberations.

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Section: Comparison With a Receiver Function Studymentioning

confidence: 99%

Characterizing the Seafloor Sediment Layer Using Teleseismic Body Waves Recorded by Ocean Bottom Seismometers

Kim,

Kawakatsu,

Akuhara

et al. 2023

JGR Solid Earth

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“…The eruptions covered an area of some 2 million km 2 , the size of Alaska or western Europe, in just a few million years. This is the largest and most voluminous igneous province, and it is thought to represent the largest known volcanic event in Earth's history (Obayashi et al., 2021).…”

Section: Argyronympha Of the Solomon Islandsmentioning

confidence: 99%

Biogeographic–tectonic calibration of 14 nodes in a butterfly timetree

Heads

Grehan

Nielsen³

et al. 2023

Cladistics

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The butterfly subtribe Coenonymphina (Nymphalidae: Satyrinae) comprises four main clades found, respectively, in (1) the Solomon Islands, (2) Australasia, (3) NW South America and (4) Laurasia, with a phylogeny: 1 (2 (3 + 4)). In assessing biogeographic evolution in the group we rejected the conversion of fossil-calibrated clade ages to likely maximum clade ages by the imposition of arbitrary priors. Instead, we used biogeographic-tectonic calibration, with fossil-calibrated ages accepted as minima. Previous studies have used this approach to date single nodes (phylogenetic-biogeographic breaks) in a group, but we extended the methodology to date multiple nodes. Within the Coenonymphina as a whole, 14 nodes coincide spatially with ten major tectonic events. In addition, the phylogenetic sequence of these nodes conforms to the chronological sequence of the tectonic events, consistent with a vicariance origin of the clades. Dating of the spatially coincident tectonic features provides a timescale for the vicariance events. The tectonic events are: pre-drift intracontinental rifting between India and Australia (150 Ma); seafloor spreading at the margins of the growing Pacific plate, and between North and South America (140 Ma); magmatism flare-up along the SW Pacific Whitsunday Volcanic Province-Median Batholith (130 Ma); a change from extension in the Clarence basin, eastern Australia, to uplift of the Great Dividing Range (114 Ma); Pamir Mountains uplift, foreland basin dynamics and high eustatic sea-levels leading to marine transgression of the proto-Paratethys Ocean eastward to Central Asia and Xinjiang (100 Ma); predrift rifting and seafloor spreading west of New Caledonia (100-50 Ma); sinistral strike-slip displacement along the proto-Alpine fault, New Zealand (100-80 Ma); thrust faulting in the Longmen Shan and foreland basin dynamics around the Sichuan Basin (85 Ma); pre-drift rifting in the Coral Sea basin (85 Ma); and dextral displacement on the Alpine fault (20 Ma).

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The foundering of stagnant slabs bearing oceanic plateau into the lower mantle

Liu

Zhang

et al. 2023

Deep Sea Research Part I: Oceanographic Research Papers

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Interrelation of the stagnant slab, Ontong Java Plateau, and intraplate volcanism as inferred from seismic tomography

Cited by 9 publications

References 51 publications

Characterizing the Seafloor Sediment Layer Using Teleseismic Body Waves Recorded by Ocean Bottom Seismometers

Characterizing the Seafloor Sediment Layer Using Teleseismic Body Waves Recorded by Ocean Bottom Seismometers

Biogeographic–tectonic calibration of 14 nodes in a butterfly timetree

The foundering of stagnant slabs bearing oceanic plateau into the lower mantle

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