The Planet Crafter: Where to Mine Different Ores

Iridium can be mined with a T1 ore extractor when placed down in the iridium cave  Cave is just under this dust cloud. this will also lead you to the Sulphur area and Osmium area

Aluminium can be mined with a T1 ore extractor anywhere in the biome with large grey rocks. 

Sulphur can be mined with a T1 extractor in the gas covered area.

Osmium can be mined with a T2 ore extractor in the osmium caves. The easiest cave i found to put one in is just off of the gas filled area where you mine sulphur. .

Uranium can be mined with a T2 ore Extractor in the uranium cave. Its a bit tricky to find, so first you start in the rock spire biome. You then find this crevasse and follow it. On the other side of the crevasse the cave is almost directly straight and a bit to the right. For people who find it easier to follow coordinates, entrance is at 580:35:-655

Super alloy requires T2 ore extractor and can be mined in super alloy cave. To find, go to the nose of the big ship and head in the direction im looking. youll find this cave entrance and can set up extractor inside. For people who find it easier to follow coordinates, entrance is at 1065:65:1700