are there any add ons that show all minerals in the area on the main map?

No there aren't any that show it. You have tracking for that. But there IS an addon called Gatherer I think, and after you mine or skin, or perform any gathering skill, it records it on your map so you can go back later to get it if it's there. Very helpful!

Thanks Laxrocks got the addon its very usefull, but the minerals wil not be showed on a Map from a addon like Carbonite.
So you need to use Orginal map from WoW (u can change it by Options by Carbonite or other quest helpers)
PS: Download Database too!

Cartographer Complete.  Download it, love it.  It is similiar to gatherer, except it comes with a full library, and will show on both the main map and the mini map!