Zhamanshin astrobleme provides evidence for carbonaceous chondrite and post-impact exchange between ejecta and Earth’s atmosphere [PDF]
Nature Communications, 2017 Identifying the original impactor from craters remains challenging. Here, the authors use chromium and oxygen isotopes to indicate that the Zhamanshin astrobleme impactor was a carbonaceous chrondrite by demonstrating that depleted 17O values are due to ...
Tomáš Magna +9 more
doaj +2 more sources
Early planetesimal differentiation and late accretion shaped Earth’s nitrogen budget [PDF]
Nature CommunicationsThe relative roles of protoplanetary differentiation versus late accretion in establishing Earth’s life-essential volatile element inventory are being hotly debated.
Wenzhong Wang +3 more
doaj +2 more sources
Abiotic sugars in (162173) Ryugu and the primitive CI carbonaceous chondrite Orgueil [PDF]
Meinert C +4 more
europepmc +2 more sources
Carbon Speciation and Solubility in Silicate Melts
Geophysical Monograph Series, Page 179-194., 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 ...
Natalia Solomatova +2 more
wiley +5 more sources
The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces
Geophysical Monograph Series, Page 229-246., 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.
Alexander J. Dickson +2 more
wiley +2 more sources
Speciation of organosulfur compounds in carbonaceous chondrites [PDF]
Scientific Reports, 2021 AbstractDespite broad application of different analytical techniques for studies on organic matter of chondrite meteorites, information about composition and structure of individual compounds is still very limited due to extreme molecular diversity of extraterrestrial organic matter.
Zherebker, Alexander +11 more
openaire +4 more sources
Kivesvaara C2 chondrite: silicate petrography and chemical composition [PDF]
Bulletin of the Geological Society of Finland, 1983 Fragments of the Kivesvaara meteorite were said to have been found in Paltamo, northern Finland in 1968. The chemical and mineral composition and the textural features show that this meteorite is a rare C2 carbonaceous chondrite.
K.A. Kinnunen, R. Saikkonen
doaj +1 more source
Iridium anomaly in the cretaceous-paleogene boundary at Højerup (Stevns Klint, Denmark) and Woodside Creek (New Zealand): The question of an enormous proportion of extraterrestrial component [PDF]
Journal of the Serbian Chemical Society, 2012 The Cretaceous-Paleogene boundary clays at Højerup and Woodside Creek show anomalous enrichments of iridium compared with the marine sedimentary rocks.
Premović Pavle I. +2 more
doaj +1 more source
Possible Ribose Synthesis in Carbonaceous Planetesimals
Life, 2022 The origin of life might be sparked by the polymerization of the first RNA molecules in Darwinian ponds during wet-dry cycles. The key life-building block ribose was found in carbonaceous chondrites.
Klaus Paschek +7 more
doaj +1 more source
The Magnesium Isotope Composition of Samples Returned from Asteroid Ryugu
The Astrophysical Journal Letters, 2023 The nucleosynthetic isotope composition of planetary materials provides a record of the heterogeneous distribution of stardust within the early solar system.
Martin Bizzarro +89 more
doaj +1 more source