  A two-spin-1/2 Heisenberg XYZ model with Dzyaloshinsky--Moriya (DM) and
Kaplan--Shekhtman--Entin-Wohlman--Aharony (KSEA) interactions in the presence
of an inhomogeneous external magnetic field is considered at thermal
equilibrium. Its density matrix has the general X form for which we derive
explicit formulas for the local quantum Fisher information (LQFI) and local
quantum uncertainty (LQU) directly in terms of model parameters. This allows us
to perform a comparative study for the discord-type quantum correlations LQFI
and LQU and to reveal a number of new features in their behavior. In
particular, the sudden transitions of quantum correlations with a smooth change
in temperature are found. Moreover, it is shown that there may be a sequence of
such transitions for certain choices of interaction constants.
