Just a normal impact crater
it doesn't look like anything volcanic.
Impact heating is quite small for a crater as modest as Victoria. Most of the heat is held in a "pool" of crushed and possibly partly melted rock in the floor of the crater. Very large craters WOULD have hydrothermal and volcanic systems - I beleive that tis is the explanation of many of the sulphate mounds and sheets that are found in large craters.