A sawtooth-like timeline for the first billion years of lunar bombardment
- A. Morbidelli, S. Marchi, W. Bottke, D. Kring
- Physics
- 22 August 2012
Global resurfacing of Mercury 4.0–4.1 billion years ago by heavy bombardment and volcanism
- S. Marchi, C. Chapman, C. Fassett, J. Head, W. Bottke, R. Strom
- GeologyNature
- 4 July 2013
The findings suggest that persistent volcanism could have been aided by the surge of basin-scale impacts during this bombardment of Mercury, suggesting that resurfacing was global and was due to volcanism, as previously suggested.
On the nucleus structure and activity of comet 67P/Churyumov-Gerasimenko
- H. Sierks, C. Barbieri, M. Pätzold
- Physics, GeologyScience
- 23 January 2015
Images from the OSIRIS scientific imaging system onboard Rosetta show that the nucleus of 67P/Churyumov-Gerasimenko consists of two lobes connected by a short neck, which raises the question of whether the two Lobes represent a contact binary formed 4.5 billion years ago, or a single body where a gap has evolved via mass loss.
Widespread mixing and burial of Earth’s Hadean crust by asteroid impacts
It is found that the surface of the Hadean Earth was widely reprocessed by impacts through mixing and burial by impact-generated melt, which may explain the age distribution of Hadesan zircons and the absence of early terrestrial rocks.
A NEW CHRONOLOGY FOR THE MOON AND MERCURY
- S. Marchi, S. Mottola, G. Cremonese, M. Massironi, E. Martellato
- Physics
- 1 September 2008
In this paper, we present a new method for dating the surface of the Moon, obtained by modeling the incoming flux of impactors and converting it into a size distribution of resulting craters. We…
Thermal fatigue as the origin of regolith on small asteroids
- M. Delbo’, G. Libourel, S. Marchi
- Physics, GeologyNature
- 2 April 2014
It is reported that thermal fatigue, a mechanism of rock weathering and fragmentation with no subsequent ejection, is the dominant process governing regolith generation on small asteroids and that thermal fragmentation induced by the diurnal temperature variations breaks up rocks larger than a few centimetres more quickly than do micrometeoroid impacts.
The global shape, density and rotation of Comet 67P/Churyumov-Gerasimenko from preperihelion Rosetta/OSIRIS observations
- L. Jorda, R. Gaskell, K. Wenzel
- Physics, Geology
- 1 October 2016
The Violent Collisional History of Asteroid 4 Vesta
- S. Marchi, H. McSween, C. Russell
- Geology, PhysicsScience
- 11 May 2012
Dawn observations confirm that Vesta is a small differentiated planetary body with an inner core, and represents a surviving proto-planet from the earliest epoch of solar system formation, and presents the mineralogical characterization of Vesta, revealing that this asteroid underwent a complex magmatic evolution that led to a differentiated crust and mantle.
Ammoniated phyllosilicates with a likely outer Solar System origin on (1) Ceres
- M. C. Sanctis, E. Ammannito, C. Russell
- Geology, PhysicsNature
- 10 December 2015
Measurements of Ceres indicate widespread ammoniated phyllosilicates across the surface, but no detectable water ice, which suggests that material from the outer Solar System was incorporated into Ceres, either during its formation at great heliocentric distance or by incorporation of material transported into the main asteroid belt.
...
...