Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Zinc isotope analyses of singularly small samples (<5 ng Zn):
  investigating chondrule-matrix complementarity in Leoville   The potential complementarity between chondrules and matrix of chondrites,
the Solar System's building blocks, is still a highly debated subject.
Complementary superchrondritic compositions of chondrite matrices and
subchondritic chondrules may point to formation of these components within the
same reservoir or, alternatively, to mobilization of elements during secondary
alteration on chondrite parent bodies. Zinc isotope fractionation through
evaporation during chondrule formation may play an important role in
identifying complementary relationships between chondrules and matrix and is
additionally a mobile element during hydrothermal processes. In an effort to
distinguish between primary Zn isotope fractionation during chondrule formation
and secondary alteration, we here report the Zn isotope data of five chondrule
cores, five corresponding igneous rims and two matrices of the relatively
unaltered Leoville CV3.1 chondrite. The detail required for these analyses
necessitated the development of an adjusted Zn isotope analyses protocol
outlined in this study.

29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph