As a crucial strategic resource, it is mainly contained in bastnaesite, xenotime
, monazite, and other minerals.
AMD has established about 2000 tonnes of xenotime
-bearing heavy mineral concentrate containing 2% xenotime
in the riverine heavy mineral placer deposits of Chhattisgarh and Jharkhand.
hosted mineralisation remains open in both cross section and strike.
Mineralogical work completed by the company indicated that a wide variety of rare-earth element-bearing minerals have been identified, including apatite, iimoriite, kainosite, gadolinite, allanite, bastnaesite, parisite, brannerite, thalenite, xenotime
, fergusonite, synchysite (Y), and monazite.
Yttrium is most abundant in the Ormiston samples, and, given that this locality was the only one to yield xenotime
under SEM, is presumably concentrated like Th and the REE into phosphatic accessory minerals.
These characteristics are different from those displayed by typical granodiorite bodies in the SMB, which are medium to coarse grained and megacrystic, have 15-25% biotite (with accessory apatite, zircon, monazite, xenotime
, and ilmenite), trace amounts of muscovite, cordierite, and garnet, and have high proportions ofxenoliths derived from the Meguma Group (MacDonald 2001).
The section on petrology includes a diverse suite of articles that cover apatite in igneous systems (Piccoli and Candela), apatite, monazite, and xenotime
in metamorphic systems (Spear and Pyle), electron microprobe analysis of the aforementioned (Pyle, Spear, Wark), and sedimentary phosphates (Knudesen and Gunter).
9 - - Sample Weathered Monazite Xenotime
The monoclinic, monazite structure, orthophosphates show a higher degree of Pb incorporation than the tetragonal xenotime
The sample was composed of 80 minerals, of which 25 hosted REs; the majority contained within the minerals Xenotime
, Yttrosynchysite, and Monazite.
The Stromberg Project's xenotime
mineralogy, large exploration potential and apparently favourable mining geometry are attracting a lot of attention for the Project and the Company.
In rock-forming minerals, K commonly resides in alkali feldspars and micas, while U and Th reside in monazite, xenotime
, zircon, and various oxides (Dickson and Scott 1997).