Something akin to what I suggested years ago before launch. My notion is this, that mining is a job and as such it needs to be involved as to be immersive. Right now I point a laser and use limpets. Without room for limpets there was more work involved.
I always liked the idea you had to scan an asteroid field and it would, in a way not dissimilar from the SRV scanner, suggest peaks in ore. You would need a mining scanner module for this. Then, you fly in closer and do a scan on an asteroid. Right now all you can do is use a prospector limpet or drill once and see if it has what you need.
I would think that the more expensive the scanner, the more types of a category it would pick up, categories being minerals or metals and chemicals. It would be more expensive in several ways.
1: Range, to get an general overview of a large section of a ring e.g.
2: Detail, when in the field, scan for target signals and hone in on specific roids.
3: Type, so that you get scanners who will do great finding metals, but not chemicals.
4: Specific, so that a module will pick up a specific type of ore much clearer.
And all at the cost of another parameter. I suppose Engineers could enhance this further. This way you can create a niche for yourself as a Master Bauxite Miner but it will cost you millions to get a module to pick up Painite, for balance purposes.
Personally I want a mining scanner to create a better overlay on the asteroid belt so I can see what roids I probed rather than flying up to it now and see its depleted. This will help people with impaired spatial awareness
I also like the idea of actually closing on a rock and performing a Deep Scan. And then the rock will show where the good stuff is and you get a sort of mini-game where you have to aim your laser to maximize ore release. At 10 minutes in you can see how STO does it:
https://www.youtube.com/watch?v=he3x1iqzfsA
What would a Deep Scan look like? Maybe an overlay of semi-transparent vector graphics. Might be easy since these objects are 3D models made of triangles anyway.
Since it will take more time because it is more involved, yields could be bigger to compensate. The sense of achievement will be greater. Of course, you could simply be a mining surveyor, not an actual minder and sell the information on the market for miners to buy. And the more valuable the lodes found, the higher the cost of the intel.
This will add also the possibilities of buying crooked data in flight from an NPC. And data bought expires in some way if you wait too long to get there as other miners will have depleted that locality. Even a pirate can buy the info and plan his piracy if the info was sold to many miners. In that case I suggest that Mining Info Datasets get a counter on them, to see how often it was sold, with a maximum of sales. So 2/6. Two times sold, 4 remaining.