18b), apatite, monazite, and xenotime
, which are mostly hosted by biotite; and garnet, which occurs as inclusions in plagioclase.
Northern Minerals Managing Director George Bauk said, "We have been encouraged by the drilling progress to date, and we have had visual indications of the targeted xenotime
mineralization in several of the holes.
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.
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
Less common is zircon, monazite with xenotime
inclusions, and iron oxides/ hydroxides.
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.
Other minerals found in the Kafubu emerald area include allanite (small euhedral crystals in rock), amethystine quartz (in a single 10-cm-wide vein), bertrandite (7-mm crystal aggregates replacing beryl), columbite-(Mn), tantalite-(Mn) (prismatic euhedral microcrystals), monazite (euhedral microcrystals), epidote, gahnite, phenakite (crystals to 1 cm enclosed in beryl), plumbomicrolite (brownish yellow crystals to 1 mm), and xenotime
(euhedral micro-crystal inclusions) (Seifert et al.
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).
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).
Accessory minerals are andalusite, zircon, apatite, ilmenite, xenotime
, monazite, rare sphene and garnet.
Produce samples for continued flow sheet development and metallurgical test work; drilling aims to increase information on the style and distribution of the important HREE mineral xenotime
at the prospect;
Heavy minerals, particularly members of the magnetic suite such as zircon, rutile, and xenotime
, have been widely but uncritically used to establish parent material uniformity and extent of weathering in both individual soils and soil sequences.