Denied for the following reasons:
~Katon, by itself, can NOT produce a large mountain in order to be performed. Nor would the the result be lava production. Therefore, you would need doton as well. And because of this, the technique would be classified as a laval ninjutsu. But lava release is only available as a KKG ability, so you can't have it.
~The technique doesn't seem to have anything to do with the Sharingan at all. Unless the chakra drain happens to cost you temperary blindness? This jutsu, more and likely, would be classified as a Mangekyou ninjutsu technique. And since you don't have MS, it is denied.