Growth and evolution of secondary volcanic atmospheres: I. Identifying the geological character of hot rocky planets [PDF]
, 2021 The geology of Earth and super-Earth sized planets will, in many cases, only be observable via their atmospheres. Here, we investigate secondary volcanic atmospheres as a key base case of how atmospheres may reflect planetary geochemistry. We couple volcanic outgassing with atmospheric chemistry models to simulate the growth of C-O-H-S-N atmospheres in
arxiv +1 more source
Geobiology, Volume 21, Issue 1, Page 119-132, January 2023., 2023 Abstract Stable isotopes in mollusc shells, together with variable growth rates and other geochemical properties, can register different environmental clues, including seawater temperature, salinity and primary productivity. However, the strict biological control over the construction of biominerals exerted by many calcifying organisms can constrain ...
Arianna Mancuso +5 more
wiley +1 more source
Planets or asteroids? A geochemical method to constrain the masses of White Dwarf pollutants [PDF]
, 2021 Polluted white dwarfs that have accreted planetary material provide a unique opportunity to probe the geology of exoplanetary systems. However, the nature of the bodies which pollute white dwarfs is not well understood: are they small asteroids, minor planets, or even terrestrial planets?
arxiv +1 more source
Evidence for a reducing Archean ambient mantle and its effects on the carbon cycle [PDF]
, 2016 Chemical reduction-oxidation mechanisms within mantle rocks link to the terrestrial carbon cycle by influencing the depth at which magmas can form, their composition, and ultimately the chemistry of gases released into the atmosphere.
Aulbach, Sonja, Stagno, Vincenzo
core +1 more source
Geoastronomy: Rocky planets as the Lavosier-Lomonosov Bridge from the non-living to the living world [PDF]
, 2021 Life on Earth emerged at the interface of the geosphere, hydrosphere and atmosphere. This setting serves as our basis for how biological systems originate on rocky planets. Often overlooked, however, is the fact that the chemical nature of a rocky planet is ultimately a product of galactic chemical evolution.
arxiv +1 more source
Carbonate alteration of ophiolitic rocks in the Arabian–Nubian Shield of Egypt: sources and compositions of the carbonating fluid and implications for the formation of Au deposits [PDF]
, 2016 Ultramafic portions of ophiolitic fragments in the Arabian–Nubian Shield (ANS) show pervasive carbonate alteration forming various degrees of carbonated serpentinites and listvenitic rocks.
Azer, Mokhles K. +9 more
core +2 more sources
Sulfur loss from subducted altered oceanic crust and implications for mantle oxidation [PDF]
, 2020 © The Author(s), [year]. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Walters, J. B., Cruz-Uribe, A. M., & Marschall, H. R.
Cruz‐Uribe, Alicia M. +2 more
core +1 more source
Journal of Metamorphic Geology, Volume 41, Issue 1, Page 25-57, January 2023., 2023 Abstract The Variscan high‐grade metamorphic basement of northern Sardinia and southern Corsica record lower Carboniferous anatexis related to post‐collisional decompression of the orogen. Migmatites exposed in the Punta Bianca locality (Italy) consist of quartz + biotite + plagioclase + K‐feldspar orthogneisses, garnet and cordierite‐bearing diatexite
Leonardo Casini +6 more
wiley +1 more source
Geology of mantle xenoliths and maars of Dona Ana County, south-central New Mexico
New Mexico Mineral Symposium, 1992 Mark A. Ouimette, Andrea Reade
openaire +3 more sources
Crustal controls on apparent mantle pyroxenite signals in ocean-island basalts
Geology, 2019 Ocean-island basalts (OIBs) provide a unique insight into the extent of lithological heterogeneity (peridotite vs. pyroxenite) in Earth’s convecting mantle.
M. Gleeson, S. Gibson
semanticscholar +1 more source