Sorry Nick. You'd be the resident expert. I've some mapping experience with small Cambrian carbonatite, the McClure Mtn Stock and Visited the Iron Mountain complex (both in Colorado) on field trips. I know the guy who staked the Titanium claims at Iron Mountain. Here's a link about : the project. Ironic name, eh?
For those interested, here's a page from the USGS: a descriptive model of Carbonatite deposits. Interesting, indeed. Along with having many of the minerals we've beed discussing: apatite, rutile, sphene, amphiboles, pyroxenes, etc, they can have the porphyritic textures we've noticed. Furthermore, according to this report, they develop soils rich in goethite.
I'm just about to walk out on a limb, but I've a bit more research to do.
Space/Science » in reply to re: Mineral Sands
Looking who I'm telling 'bout carbonatites!
The whole thread (59 posts)
- Smooth inclusions in Wishstone rock.
- Squires on Wishstone
- UPDATE: Wishstone Rich in Phosphorus
- re: Smooth inclusions in Wishstone rock.
- Non-crystalline material?
- porphyritic basalt