https://mods.factorio.com/mod/bztungsten/discussion/640974c0c3dfc0bfeeb7df12
I learned that wolframite is a compound of iron, manganese and tungsten, so...
like copper ore from zircon, how about adding iron ore to (optional) byproduct of wolframite smelting?
https://mods.factorio.com/mod/bztungsten/discussion/640974c0c3dfc0bfeeb7df12