On the Nucleosynthetic Origin of Presolar Silicon Carbide X-Grains
In this paper we present an extension of our nucleosynthesis parameter study within the classical neutrino-driven wind scenario of core-collapse supernovae (ccSNe).
Waheed Akram +3 more
doaj +1 more source
Cretaceous-tertiary boundary layer at Stevns Klint (Denmark): Copper and copper(II) porphyrins [PDF]
High concentrations (up to 4000 ppm) of copper(II) porphyrins have been detected in the kerogen of the Cretaceous/Tertiary (KT) boundary informal type sediment, the Fish Clay, at Stevns Klint, Denmark.
Premović Pavle I. +4 more
doaj +1 more source
Cometary impacts into ocean: Thermodynamical equilibrium calculations of high-temperature O2 generation on the early Earth [PDF]
The early Earth’s atmosphere apparently differed from the present atmosphere mainly in its lack of free O2, and this absence is believed to have been indispensable for the origin of early anaerobic life forms. One of the central problems in Earth science
Premović Pavle I., Panov Katja I.
doaj +1 more source
Noble Gas Mass Spectrometry in Earth and Planetary Sciences
: Noble gases are very rare elements in most relevant samples in geochemistry and cosmochemistry. Noble gases may perhaps also look rather boring to chemists, as they do not form any stable compounds.
Rainer Wieler
doaj +1 more source
Organic Matter in the Asteroid Ryugu: What We Know So Far
The Hayabusa2 mission was tasked with returning samples from the C-complex asteroid Ryugu (1999 JU3), in order to shed light on the formation, evolution and composition of such asteroids.
Christian Potiszil +8 more
doaj +1 more source
Air oxidation of the kerogen/asphaltene vanadyl porphyrins: An electron spin resonance study [PDF]
The thermal behavior of vanadyl porphyrins was studied by electron spin resonance during heating of kerogens, isolated from the La Luna (Venezuela) and Serpiano (Switzerland) bituminous rocks, at 250ºC for 1 to 20 days in the presence of air ...
Premović Pavle I. +3 more
doaj +1 more source
The cretaceous-tertiary boundary Fiskeler at Stevns Klint, Denmark: The geochemistry of the major trace metals [PDF]
Trace metals in the four discrete layers of the Cretaceous-Tertiary boundary (Fiskeler) at Stevns Klint (Denmark) are relatively well studied, yet much remains to be learned about them. Therefore, an integrated study of the trace (meteoritic Ir,
Premović Pavle I. +7 more
doaj +1 more source
Origin of ocean island basalts in the West African passive margin without mantle plume involvement
The genesis of hotspot magmatism remains controversial especially at continental margins such as offshore West Africa. Here, by analysing trace element and Pb isotopes of intraplate basalts, the authors conclude that their generation was caused by the ...
Iyasu Getachew Belay +4 more
doaj +1 more source
Cretaceous-Tertiary boundary deposits in Denmark: A diachroneity [PDF]
The lateral distribution of predominantly terrestrial kerogen or humics enriched with copper(II) porphyrins (Cu-P) across the Danish marine basin implies that the alleged Cretaceous-Tertiary (KT) boundary deposits in western Denmark (at the Nye Kløv ...
Premović Pavle I.
doaj +1 more source

