The trillions in mineral wealth made me surf a little for good resources on Afghanistan geology.
Here are links to some:
The United States Geological Survey has a Afghanistan Projects website with links to geological map quads ( 1:250,000), Landsat images, reports and photo gallery.
The British Geological Survey has a collection of downloadable maps on geology, mineral distribution, tectonics and hydrogeology.
For an interactive experience the OneGeology portal has a map viewer to browse Afghanistan geology. The portal is administered by the British and French Geological Survey.
Nature News has quite a good article on the recent history of geological mapping of Afghanistan and tensions and political conflicts over control of this mineral wealth.
GeoCommunity.. a geospatial news and education resource site has a collection of links to maps, images and viewer applications.