Relationships between the trace element composition of sedimentary rocks and upper continental crust
, 2001 Estimates of the average composition of various Precambrian shields and a variety of estimates of the average composition of upper continental crust show considerable disagreement for a number of trace elements, including Ti, Nb, Ta, Cs, Cr, Ni, V, and ...
S. McLennan
semanticscholar +1 more source
Archean upper crust transition from mafic to felsic marks the onset of plate tectonics
Science, 2016 New crustal clues from old rocks The ghost of continental crust long eroded away may exist in certain element ratios found in Archean rocks. Tang et al. used Ni/Co and Cr/Zn ratios as a proxy for the magnesium oxide that long ago weathered away in Earth ...
Ming Tang, Kang Chen, R. Rudnick
semanticscholar +1 more source
Shear-wave velocity structure of Australia from Rayleigh-wave analysis
Earth Sciences Research Journal, 2014 The elastic structure beneath Australia is shown by means of S-velocity maps for depths ranging from zero to 400 km, determined by the regionalization and inversion of Rayleigh-wave dispersion.
Víctor Corchete
doaj +1 more source
Lizards and amphisbaenians (Reptilia, Squamata) from the middle Eocene of Mazaterón (Soria, Spain)
The Anatomical Record, EarlyView., 2023 Abstract The assemblage of lizards and amphisbaenians (Reptilia, Squamata) from the middle Eocene locality of Mazaterón (Spain) is described. Considering the rather limited material available for the study, the assemblage shows a moderate diversity with eight taxa corresponding to five different families.
Arnau Bolet
wiley +1 more source
Shear-wave Velocity Structure of Greenland from Rayleigh-wave Analysis
Earth Sciences Research Journal, 2016 The elastic structure beneath Greenland is shown by means of S-velocity maps for depths ranging from zero to 350 km, determined by the regionalization and inversion of Rayleigh-wave dispersion.
V. Corchete
doaj +1 more source
A crustal LVZ in Iceland revealed by ambient noise multimodal surface wave tomography
Frontiers in Earth Science, 2022 The crustal low-velocity zone (LVZ), an important anomaly found in some regional structures of Iceland, is still absent in the Icelandic average velocity structure due to limitations of tomography methods.
Sen Zhang +17 more
doaj +1 more source
Equation of state and thickness of the inner crust of neutron stars [PDF]
Phys. Rev. C 90, 045803 (2014), 2014 The cell structure of $\beta$-stable clusters in the inner crust of cold and warm neutron stars is studied within the Thomas-Fermi approach using relativistic mean field nuclear models. The relative size of the inner crust and the pasta phase of neutron stars is calculated, and the effect of the symmetry energy slope parameter, $L$, on the profile of ...
arxiv +1 more source
Age, spreading rates, and spreading asymmetry of the world's ocean crust
, 2008 We present four companion digital models of the age, age uncertainty, spreading rates, and spreading asymmetries of the world's ocean basins as geographic and Mercator grids with 2 arc min resolution.
R. Müller +3 more
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Crust Cooling Models are Insensitive to the Crust-Core Transition Pressure for Realistic Equations of State [PDF]
, 2019 Neutron stars cooling after sustained accretion outbursts provide unique information about the neutron star crust and underlying dense matter. Comparisons between astronomical observations of these cooling transients and model calculations of neutron star crust cooling have frequently been used to constrain neutron star properties such as the mass ...
arxiv +1 more source
No evidence for high-pressure melting of Earth’s crust in the Archean
Nature Communications, 2019 Much of the present-day volume of Earth’s continental crust had formed by the end of the Archean Eon, 2.5 billion years ago, through the conversion of basaltic (mafic) crust into sodic granite of tonalite, trondhjemite and granodiorite (TTG) composition.
R. H. Smithies +11 more
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