Oxidation States of Fe in Constituent Minerals of a Spinel Lherzolite Xenolith from the Tariat Depression, Mongolia: The Significance of Fe3+ in Olivine [PDF]
, 2018 The oxidation states of Fe within olivine, orthopyroxene, clinopyroxene, and spinel in a spinel lherzolite xenolith from the Tariat Depression, Mongolia were investigated using 57Fe Mossbauer spectroscopy to evaluate the redox condition of the upper ...
Terumi Ejima +7 more
openalex +2 more sources
Tectonics, 2017 The composition of the continental lower crust is not well known. High seismic wave speeds may indicate mafic or garnet‐bearing material, with implications for emplacement history, evolution, and rheological and dynamic behavior. In this contribution, we
Vera Schulte-Pelkum +2 more
exaly +2 more sources
Carbonate- and silicate-metasomatized mantle beneath Himalayan-Tibetan orogenic belt [PDF]
Communications Earth & EnvironmentThe extreme geochemical enrichment of post-collisional potassium-rich lava in the Alpine-Himalayan orogenic belt has led researchers to hypothesize that enrichment is inherited from a metasomatized mantle source potentially incorporating crustal ...
Weikai Li +4 more
doaj +2 more sources
Pressure‐Induced sp 2 ‐sp 3 Transitions in Carbon‐Bearing Phases
Geophysical Monograph Series, Page 1-9., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Sergey S. Lobanov +1 more
wiley +7 more sources
Protracted late Paleozoic volcanic arc activity along the Northeast Asian continental margin [PDF]
Scientific ReportsNortheast Asia is a complex tectonic collage bounded by Paleozoic–Mesozoic internal and peripheral orogens, whose distribution and continuity are obscured by later deformation and magmatic overprinting.
Hyeong Soo Kim +6 more
doaj +2 more sources
Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab [PDF]
Nature Communications, 2018 The onset of modern-style plate tectonics remains under debate. Here, Xu et al. report a cold thermal-gradient recorded in an eclogite xenolith in Paleoproterozoic carbonatite from orogen, and propose that modern-style subduction has operated since at ...
Cheng Xu +10 more
doaj +2 more sources
Abiotic polycyclic aromatic hydrocarbons originating from the sub-oceanic mantle [PDF]
Scientific ReportsExperimental studies have demonstrated that petroleum may form from abiotic organic compounds synthesised in the Earth’s upper mantle. However, the most direct evidence of mantle-derived organics, as obtained from whole-rock analyses, indicates ambiguous
Itaru Mitsukawa +13 more
doaj +2 more sources
Geophysical Monograph Series, Page 263-304., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside +3 more
wiley +5 more sources
Geodynamic implications of xenolith geotherms
Geochemistry, Geophysics, Geosystems, 2003 Studies of xenolith suites yield depth‐temperature arrays for the lithosphere at the time of eruption. These studies constrain the conductive heat flow through the lithosphere and limit the temperature range across the rheological boundary layer to <300 K. Numerical models of convection illustrate features that may be found within suites of samples.
N. Sleep
openaire +2 more sources