Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transport of impact ejecta from Mars to its moons as a means to reveal
  Martian history   Throughout the history of the solar system, Mars has experienced continuous
asteroidal impacts. These impacts have produced impact-generated Mars ejecta,
and a fraction of this debris is delivered to Earth as Martian meteorites.
Another fraction of the ejecta is delivered to the moons of Mars, Phobos and
Deimos. Here, we studied the amount and condition of recent delivery of impact
ejecta from Mars to its moons. Using state-of-the-art numerical approaches, we
report, for the first time, that materials delivered from Mars to its moons are
physically and chemically different from the Martian meteorites, which are all
igneous rocks with a limited range of ages. We show that Mars ejecta mixed in
the regolith of its moons potentially covers all its geological eras and
consists of all types of rocks, from sedimentary to igneous. A Martian moons
sample-return mission will bring such materials back to Earth, and the samples
will provide a wealth of "time-resolved" geochemical information about the
evolution of Martian surface environments.

19
The categories of this paper are: eess
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol