1.
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Biogeochemical reactions modulate the chemical composition of the oceans and atmosphere, providing feedbacks that sustain planetary habitability over geological time. Her [...]
13 March 2024 |
Geophysical Sciences |
Article |
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2.
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‘Live-dead comparison’ refers to the measurement of compositional fidelity between living communities and co-occurring accumulations of dead skeletal material (time-a [...]
2024-03 |
Geophysical Sciences |
Dissertation |
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3.
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During the Neoproterozoic and Paleoproterozoic eras, geological evidence points to several “Snowball Earth” episodes when most of Earth’s surface was covered in ice [...]
09 February 2024 |
Geophysical Sciences |
Article |
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4.
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Understanding variation in the sulfur isotopic composition of sedimentary pyrite (δ<sup>34</sup>Spyr) is motivated by the key role of sulfur biogeochemistry [...]
26 February 2021 |
Geophysical Sciences |
Article |
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5.
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The extraterrestrial materials returned from asteroid (162173) Ryugu consist predominantly of low-temperature aqueously formed secondary minerals and are chemically and m [...]
16 December 2022 |
Geophysical Sciences |
Article |
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6.
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The Earth-Moon system likely formed as a result of a collision between two large planetary objects. Debate about their relative masses, the impact energy involved, and th [...]
28 March 2018 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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7.
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The breakup of the L-chondrite parent body in the asteroid belt 466 million years (Ma) ago still delivers almost a third of all meteorites falling on Earth. Our new extra [...]
18 September 2019 |
Geophysical Sciences |
Article |
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8.
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The <sup>87</sup>Rb-<sup>87</sup>Sr radiochronometer provides key insights into the timing of volatile element depletion in planetary bodies, yet [...]
09 July 2021 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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9.
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Studies of material returned from Cb asteroid Ryugu have revealed considerable mineralogical and chemical heterogeneity, stemming primarily from brecciation and aqueous a [...]
08 November 2023 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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10.
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Plate subduction greatly influences the physical and chemical characteristics of Earth's surface and deep interior, yet the timing of its initiation is debated because of [...]
09 December 2020 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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11.
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Modern meteorite classification schemes assume that no single planetary body could be source of both unmelted (chondritic) and melted (achondritic) meteorites. This dicho [...]
24 July 2020 |
Geophysical Sciences |
Article |
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12.
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Mars’ surface bears the imprint of valley networks formed billions of years ago. Whether these networks were formed by groundwater sapping, ice melt, or fluvial runoff [...]
27 June 2018 |
Geophysical Sciences |
Article |
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13.
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Little is known about the origin of the spectral diversity of asteroids and what it says about conditions in the protoplanetary disk. Here, we show that samples returned [...]
20 October 2022 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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14.
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High-temperature condensates found in meteorites display uranium isotopic variations (235U/238U) that complicate dating the solar system's formation and whose origin rema [...]
04 March 2016 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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15.
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Geological evidence indicates that grounded ice sheets reached sea level at all latitudes during two long-lived Cryogenian (58 and ≥5 My) glaciations. Combined uranium- [...]
08 November 2017 |
Geophysical Sciences |
Article |
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16.
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Evidence continues to emerge for the production and low-level accumulation of molecular oxygen (O<sub>2</sub>) at Earth's surface before the Great Oxidation E [...]
29 September 2021 |
Geophysical Sciences |
Article |
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17.
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Establishing the age of the Moon is critical to understanding solar system evolution and the formation of rocky planets, including Earth. However, despite its importance, [...]
11 January 2017 |
Geophysical Sciences |
Article |
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18.
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Equilibrium condensation of solar gas is often invoked to explain the abundance of refractory elements in planets and meteorites. This is partly motivated, by the observa [...]
06 January 2021 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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19.
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Equilibrium condensation of solar gas is often invoked to explain the abundance of refractory elements in planets and meteorites. This is partly motivated, by the observa [...]
07 January 2022 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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20.
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Earth’s tectonic plates are generally considered to be driven largely by negative buoyancy associated with subduction of oceanic lithosphere. In this context, mid-ocean [...]
23 December 2016 |
Geophysical Sciences |
Article |
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21.
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Chondrites display isotopic variations for moderately volatile elements, the origin of which is uncertain and could have involved evaporation/condensation processes in th [...]
01 December 2021 |
Enrico Fermi Institute; Geophysical Sciences |
Article |
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22.
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Carbon is an essential element for life, but its behavior during Earth’s accretion is not well understood. Carbonaceous grains in meteoritic and cometary materials sugg [...]
02 April 2021 |
Geophysical Sciences |
Article |
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23.
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Mars is dry today, but numerous precipitation-fed paleo-rivers are found across the planet’s surface. These rivers’ existence is a challenge to models of planetary cl [...]
27 March 2019 |
Geophysical Sciences |
Article |
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24.
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The Hayabusa2 spacecraft returned to Earth from the asteroid 162173 Ryugu on 6 December 2020. One day after the recovery, the gas species retained in the sample container [...]
20 October 2022 |
Geophysical Sciences |
Article |
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25.
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Early Mars had rivers, but the cause of Mars’s wet-to-dry transition remains unknown. Past climate on Mars can be probed using the spatial distribution of climate-sensi [...]
25 May 2022 |
Geophysical Sciences |
Article |
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