Results 41 to 50 of about 34,086 (157)
LC/ESI-MS analysis of underivatized amino acids and mass spectrum [PDF]
arXiv, 2016 We report the method of LC/ESI-MS analysis of underivatized amino acids with corresponding mass spectrum and fragmentation patterns. Diagnostic product ions determined by mass spectrometry can support the qualitative identification and quantitative estimation of individual amino acids. Therefore, the optimization of chromatographic separation using the
arxiv
Using impact exsolution to link the Chicxulub collision and Deccan volcanism [PDF]
arXiv, 2017 Observations suggest that impactors and volcanism are connected, but the mechanism that links these events is unknown. This research proposes the impact exsolution hypothesis to explain how planetary scale collisions trigger volcanism. This hypothesis says that when large objects such as asteroids or comets hit planets, they generate seismic waves that
arxiv
Water Planets in the Habitable Zone: Atmospheric Chemistry, Observable Features, and the case of Kepler-62e and -62f [PDF]
, 2013 Planets composed of large quantities of water that reside in the habitable zone are expected to have distinct geophysics and geochemistry of their surfaces and atmospheres. We explore these properties motivated by two key questions: whether such planets could provide habitable conditions and whether they exhibit discernable spectral features that ...
arxiv +1 more source
G.O.Joe: A new non‐commercial software tool for the processing of LA‐ICP‐MS trace element data
Geostandards and Geoanalytical Research, EarlyView.Key points G.O. Joe is developed to calculate trace element mass fractions including interference corrections. It is a freely accessible and platform‐independent web application to facilitate immediate data evaluation. Key feature is a simple, time‐efficient and flexible workflow to significantly improve data quality in various trace element studies ...
Florian Altenberger +4 more
wiley +1 more source
Journal of the American Ceramic Society, EarlyView.Abstract The long‐term behavior of high‐level radioactive waste glass depends on the mineralogical and geochemical interactions between the various components of the multibarrier system, under geological repository conditions. The present study focuses on SON68 glass alteration in synthetic cement water and at 50°C and 70°C.
Mathieu Debure +8 more
wiley +1 more source
A Cautionary Tale About Not ‘Joining the Dots’ to Infer Anticlockwise P$$ P $$‐T$$ T $$ Paths
Journal of Metamorphic Geology, EarlyView.ABSTRACT Uncertainty surrounds the cause and interpretation of anticlockwise pressure‐temperature (P$$ P $$–T$$ T $$) paths in metamorphic terranes. Here, we focus on the viability of a commonly proposed mechanism—magmatic heat transfer during thickening—using a case study of the Roineabhal terrane in Scotland, where such an anticlockwise P$$ P $$–T ...
Owen Weller, Joseph Benson, Alex Copley
wiley +1 more source
Phase Equilibria Analysis for Metacarbonate With Applications to Zoned Calc‐Silicate Aureoles
Journal of Metamorphic Geology, EarlyView.ABSTRACT Carbonate rocks react with infiltrating hydrothermal fluids to produce zoned calcsilicate assemblages in contact aureoles. Petrogenetic grids provide valuable insights into phase relations, metamorphic temperature (T) and the fluid composition (X) of the metacarbonate systems, as well as semi‐quantification of the prograde decarbonation at ...
Zhenhao Zhou, Xu Chu
wiley +1 more source
Journal of Metamorphic Geology, EarlyView.ABSTRACT This study presents a comprehensive examination of exceptionally preserved eclogites from the Baie Verte Peninsula, Newfoundland Appalachians, which display a high‐temperature overprint, thus offering insights into the metamorphic evolution and exhumation mechanisms of such terrains. Through an integrated approach combining field observations,
Ludovico G. Scorsolini +4 more
wiley +1 more source
Terra Nova, EarlyView.ABSTRACT The long‐term evolution of orogenic drainage systems is closely related to the propagation of tectonic structures, which gives rise to the topography and hence anisotropies for river incision. This study focuses on the subalpine Vercors Massif (SW French Alps), reconstructing the geometry of an uplifted paleo‐canyon and applying calcite U–Pb ...
Vivien Mai Yung Sen +6 more
wiley +1 more source
Geochemistry of U and Th and its Influence on the Origin and Evolution of the Crust of Earth and the Biological Evolution [PDF]
ActaPetrolog.Mineral.17:160-172,1998, 2007 We have investigated the migration behaviors of uranium (U) and thorium (Th) in Earth and other terrestrial planets. Theoretical models of U and Th migration have been proposed. These models suggest that the unique features of Earth are closely connected with its unique U and Th migration models and distribution patterns.
arxiv