Results 51 to 60 of about 441 (171)
Looking for the origin of life in cosmochemistry: Asteroids and their carbon-rich meteorites
Mètode Science Studies Journal: Annual Review, 2016 Carbonaceous chondrite meteorites are carbon-containing fragments of primitive asteroids that have offered the only samples available to date giving insights into chemical evolution in laboratory analyses.
Sandra Pizzarello
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Geologica Acta, 2009 The black marl of the Fish Clay at Højerup is mainly made up of biogenic calcite and cheto-Mg-smectite. We suggest that the formation of the smectite occurred during the latest Maastrichtian (or earlier) and that it represents a short period of rapid ...
P.I. PREMOVIC +2 more
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NWA 11562: A Unique Ureilite with Extreme Mg-rich Constituents
The Planetary Science JournalA comprehensive study of an ungrouped achondrite meteorite, North West Africa (NWA) 11562, was conducted, involving petrology, mineralogy, and mass-independent chromium isotopic composition. NWA 11562 comprises 34.9 vol% olivine, 56.1 vol% pyroxenes, 6.7
Mingbao Li +6 more
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Overview on the Re-Os isotopic method and its application on ore deposits and organic-rich rocks [PDF]
Geochimica Brasiliensis, 2013 The Re-Os method has in the last twenty years experienced outstanding improvements and is now widely applied in earth science studies. The unique geochemical characteristics of the isotopic pair allow its application on investigations that vary from ...
Juliana Charão Marques
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Eos, Transactions American Geophysical Union, 1972 The International Association of Geochemistry and Cosmochemistry will sponsor a Symposium on Cosmochemistry during the week of August 14–18, 1972. It will be held in Caimbridge, Massachusetts, and the Smithsonian Astrophysical and Harvard College Observatories will be local hosts.
openaire +1 more source
The Astrophysical JournalAn enhancement in the activity of the early young Sun resulting in a high charged particle flux has been invoked to explain excesses in spallation-induced nuclides in primitive planetary materials.
Xin Yang +2 more
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The Presolar Grain Database. I. Silicon Carbide
The Astrophysical Journal Supplement SeriesThe Presolar Grain Database (PGD) contains the vast majority of isotope data (published and unpublished) on presolar grains and was first released as a collection of spreadsheets in 2009.
Thomas Stephan +10 more
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Rare Phosphides and Nitrides in Igneous Clasts within Aqueously Altered Chondrites
The Planetary Science JournalChondritic meteorites and their components provide us with the means to investigate the conditions and processes in the early solar system, including the delivery of bio-essential elements, such as phosphorus, to the early Earth.
Lucas. R. Smith +5 more
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Modeling Carbon Outgassing from Chondritic Planetesimals
The Planetary Science JournalThe thermochemical evolution of planetesimals is an underprobed stage of volatile delivery to terrestrial planets during their formation, and may contribute to the volatile depletion of the Earth relative to primitive chondrites.
Bo Peng, Diana Valencia
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The Planetary Science JournalErg Chech 002 (EC 002), an andesitic meteorite, has been dated to be the oldest magmatic rock in the solar system. However, controversy has arisen due to inconsistent dating results and isotopic compositions in previous studies, which complicates ...
Bing Yang +5 more
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