31. Monazite , because of its magnetic properties, can be separated by repeated electromagnetic separation.32. Monazite is radioactive due to the presence of thorium and, less commonly, uranium.33. Thorium content of monazite is variable and sometimes can be up to 20 30 %. 34. Monazite from certain carbonatites or from Bolivian tin ore veins is essentially thorium-free.35. Subsequent investigations found the source of the radiation was natural, originating from monazite deposits. 36. The advantage of monazite geochronology is the ability to relate monazite compositions with geological processes. 37. The advantage of monazite geochronology is the ability to relate monazite compositions with geological processes. 38. Monazite and zircon are two minerals that commonly employed in geochronology to study geological history.39. These distinctive features can be easily identified with textual and compositional analysis in monazite geochronology. 40. The lightest lanthanides are generally better represented in monazite while the heaviest lanthanides are in xenotime.
