Impact-driven mobilization of deep crustal brines on dwarf planet Ceres

  title={Impact-driven mobilization of deep crustal brines on dwarf planet Ceres},
  author={Carol A. Raymond and Anton I. Ermakov and Julie C. Castillo‐Rogez and Sylvain Marchi and B. Carol Johnson and Marc Andre Hesse and Jennifer E. C. Scully and Debra L. Buczkowski and Hanna G. Sizemore and Paul M. Schenk and Andreas Nathues and Ryan S. Park and Thomas H. Prettyman and Lynnae C. Quick and James Tuttle Keane and M. D. Rayman and C.T. Russell},
Ceres, the only dwarf planet in the inner Solar System, appears to be a relict ocean world. Data collected by NASA’s Dawn spacecraft provided evidence that global aqueous alteration within Ceres resulted in a chemically evolved body that remains volatile-rich. Recent emplacement of bright deposits sourced from brines attests to Ceres being a persistently geologically active world, but the surprising longevity of this activity at the 92-km Occator crater has yet to be explained. Here, we use new… 

Recent cryovolcanic activity at Occator crater on Ceres

NASA’s Dawn mission revealed a partially differentiated Ceres that has experienced cryovolcanic activity throughout its history up to the recent past. The Occator impact crater, which formed ~22 Myr

Porosity-filling Metamorphic Brines Explain Ceres’s Low Mantle Density

Recent work has sought to constrain the composition and makeup of the dwarf planet Ceres’s mantle, which has a relatively low density, between 2400 and 2800 kg m−3, as inferred by observations by the

Brine residues and organics in the Urvara basin on Ceres

Ceres is a partially differentiated dwarf planet, as confirmed by NASA’s Dawn mission. The Urvara basin (diameter ~170 km) is its third-largest impact feature, enabling insights into the cerean

Evidence of non-uniform crust of Ceres from Dawn’s high-resolution gravity data

The gravity and shape data acquired by the Dawn spacecraft during its primary mission revealed that Ceres is partially differentiated with an interior structure consistent with a volatile-rich crust,

The varied sources of faculae-forming brines in Ceres’ Occator crater emplaced via hydrothermal brine effusion

It is reported that brine effusion emplaced the faculae in a brine-limited, impact-induced hydrothermal system of Occator crater of the dwarf planet Ceres, and that impact-derived fracturing enabled brines to reach the surface.

Science Drivers for the Future Exploration of Ceres: From Solar System Evolution to Ocean World Science

Dawn revealed that Ceres is a compelling target whose exploration pertains to many science themes. Ceres is a large ice- and organic-rich body, potentially representative of the population of objects

Replenishment of Near‐Surface Water Ice by Impacts Into Ceres' Volatile‐Rich Crust: Observations by Dawn's Gamma Ray and Neutron Detector

Ceres' regolith contains water ice that has receded in response to insolation‐driven sublimation. Specially targeted, high spatial‐resolution measurements of hydrogen by Dawn's Gamma Ray and Neutron

The In Situ Exploration of a Relict Ocean World: An Assessment of Potential Landing and Sampling Sites for a Future Mission to the Surface of Ceres

The Dawn orbiter’s exploration of Ceres, the most water-rich body in the inner solar system after Earth, revealed the dwarf planet to be a relict ocean world of great interest to the astrobiology and

GAUSS - genesis of asteroids and evolution of the solar system

The goal of Project GAUSS (Genesis of Asteroids and evolUtion of the Solar System) is to return samples from the dwarf planet Ceres. Ceres is the most accessible candidate of ocean worlds and the



Recent cryovolcanic activity at Occator crater on Ceres

NASA’s Dawn mission revealed a partially differentiated Ceres that has experienced cryovolcanic activity throughout its history up to the recent past. The Occator impact crater, which formed ~22 Myr

Geochemistry, thermal evolution, and cryovolcanism on Ceres with a muddy ice mantle

We present a model of the internal evolution of Ceres consistent with pre‐Dawn observations and preliminary data returned by Dawn. We assume that Ceres accreted ice and both micron‐ and

Conditions for the Long‐Term Preservation of a Deep Brine Reservoir in Ceres

We propose a new internal evolution model for the dwarf planet Ceres matching the constraints on Ceres' present internal state from the Dawn mission observations. We assume an interior differentiated

Slurry extrusion on Ceres from a convective mud-bearing mantle

Ceres is a 940-km-diameter dwarf planet that is predominantly composed of silicates and water ice. In Ceres’ partially differentiated interior, extrusive processes have led to the emplacement on its

Cryovolcanism on Ceres

It is proposed that hydrated salts with low eutectic temperatures and low thermal conductivities enabled the presence of cryomagmatic liquids within Ceres, a key process for Ceres’ evolution as recorded by the aqueously altered, secondary minerals observed on the surface.

Insights into Ceres's evolution from surface composition

Inspired by the recent results of the Dawn mission, thermodynamic models of rock alteration and brine evaporation have been used to help understand the conditions under which water–rock interaction

Evidence for the Interior Evolution of Ceres from Geologic Analysis of Fractures

Ceres is the largest asteroid belt object, and the Dawn spacecraft observed Ceres since 2015. Dawn observed two morphologically distinct linear features on Ceres's surface: secondary crater chains