Models of mantle convection incorporating plate tectonics: The Australian region since the Cretaceous [PDF]
, 2000 We propose that the anomalous Cretaceous vertical motion of Australia and distinctive geochemistry and geophysics of the Australian-Antarctic Discordance (AAD) were caused by a subducted slab which migrated beneath the continent during the Cretaceous ...
Gurnis, Michael +2 more
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A temperature profile of the mantle transition zone
Geophysical Research Letters, 1989 The temperature distribution across the transition zone has been determined on the high‐pressure phase equilibria in the system Mg2SiO4‐Fe2SiO4 recently determined by Katsura and Ito [1988] and Ito and Takahashi [1988]. The temperature at the base of the transition zone (655 km depth) is estimated to be about 1600°C, assuming that the spinel ...
Eiji Ito, Tomoo Katsura
openaire +1 more source
Seismic Tomography of the Trans-North China Orogen and Its Dynamic Implications
Frontiers in Earth Science, 2022 We present a high-resolution S wave velocity model of the Trans-North China Orogen (TNCO) and its adjacent areas derived from S wave traveltime residuals of teleseismic waveforms recorded by the dense ChinArray seismic network.
Xiaoming Xu +6 more
doaj +1 more source
Multiple mantle upwellings in the transition zone beneath the northern East-African Rift system from relative P-wave travel-time tomography [PDF]
, 2015 Mantle plumes and consequent plate extension have been invoked as the likely cause of East African Rift volcanism. However, the nature of mantle upwelling is debated, with proposed configurations ranging from a single broad plume connected to the large ...
Abdulhakim Ahmed +19 more
core +4 more sources
Geochemistry, Geophysics, Geosystems, 2013 The origin of the Bermuda swell and volcanism remains enigmatic. The lack of an associated time‐progressive hotspot track and absence of present‐day volcanic activity make it difficult to reconcile with a deep mantle plume model.
Margaret H. Benoit +2 more
doaj +1 more source
Seismic tomography of the mantle and primary hydrogen deposits in the Dnieper-Donetsk basin
Геофизический журнал, 2022 According to the three-dimensional P-velocity model of the mantle under Eurasia obtained by the Taylor approximation method, the analysis of the velocity structure of the mantle (to depths of 2500 km south of 50° N and 1700 km north) in the territory of
T.O. Tsvetkova +2 more
doaj +1 more source
Natural evidence for garnet-spinel transition (GST) in the Earth's mantle [PDF]
, 2008 This study based on compiled world-wide garnet peridotite data confirms the GST in high P and T conditions, which was obtained from Al-free experimental system (MgO-Cr~2~O~3~-SiO~2~) by Klemme (2004). A new spinel-phase peridotite zone, garnet peridotite
BenXun Su
core +3 more sources
Seismic waveform tomography of the central and eastern Mediterranean upper mantle [PDF]
Solid Earth, 2020 We present a seismic waveform tomography of the upper mantle beneath the central and eastern Mediterranean down to the mantle transition zone. Our methodology incorporates in a consistent manner the information from body and multimode surface waves ...
N. Blom +4 more
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Evidence of upper-mantle processes related to continental rifting versus oceanic crust in the Gulf of California [PDF]
, 2013 Receiver functions from teleseismic events, recorded by stations around the Gulf of California, are used to map the upper-mantle seismic discontinuities.
Clayton, Robert W., Pérez-Campos, Xyoli
core +1 more source
A global shear velocity model of the upper mantle from fundamental and higher Rayleigh mode measurements [PDF]
, 2012 International audienceWe present DR2012, a global SV-wave tomographic model of the upper mantle. We use an extension of the automated waveform inversion approach of Debayle (1999) which improves our mapping of the transition zone with extraction of ...
Debayle, Eric, Ricard, Yanick
core +3 more sources