Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
EPSC Abstracts
Vol. 14, EPSC2020-604, 2020, updated on 13 May 2024
https://doi.org/10.5194/epsc2020-604
Europlanet Science Congress 2020
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Rocklines of high temperature minerals in the protosolar nebula

Artyom Aguichine1, Olivier Mousis1, Bertrand Devouard2, and Thomas Ronnet3
Artyom Aguichine et al.
  • 1Aix-Marseille Université, Laboratoire d'Astrophysique de Marseille, Groupe Systèmes Planétaires, Marseille, France (artyomaguichine@gmail.com)
  • 2Aix Marseille Univ, CNRS, IRD, INRA, Coll France, CEREGE, Aix-en-Provence, France
  • 3Lund Observatory, Department of Astronomy and Theoretical Physics, Lund University, Box 43, 221 00 Lund, Sweden

In our solar system, terrestrial planets and meteoritical matter exhibit various bulk compositions. To understand this variety of compositions, formation mechanisms of meteorites are usually investigated via a thermodynamic approach that neglect the processes of transport throughout the protosolar nebula. Here, we investigate the role played by rocklines (condensation/sublimation lines of refractory materials) in the innermost regions of the protosolar nebula to compute the composition of particles migrating inward the disk as a function of time. To do so, we utilize a one-dimensional  accretion disk model with a prescription for dust and vapor transport, sublimation and recondensation of refractory materials (ferrosilite, enstatite, fayalite, forsterite, iron sulfur, kamacite and nickel). We find that the diversity of the bulk composition of cosmic spherules can be explained by their formation close to rocklines, suggesting that solid matter is concentrated in the vicinity of these sublimation/condensation fronts. Although our model relies a lot on the number of considered species and the availability of thermodynamic data governing state change, it suggests that rocklines played a major role in the formation of small and large bodies in the innermost regions of the protosolar nebula. The results of our model are consistent with the composition of chondrules and cosmic spherules. Our model gives insights on the mechanisms that might have contributed to the formation of Mercury's large core.

How to cite: Aguichine, A., Mousis, O., Devouard, B., and Ronnet, T.: Rocklines of high temperature minerals in the protosolar nebula, Europlanet Science Congress 2020, online, 21 Sep–9 Oct 2020, EPSC2020-604, https://doi.org/10.5194/epsc2020-604, 2020.