Assertion: thorium | /r/HasProperty | mined
Facets:
value: mainly
type: DEGREE
Source sentences:
text: Where higher concentrations occur in rock or sands, thorium may be mined and refined, producing waste products such as mill tailings.
text: The advantages of adding electricity to our national electric grid using thorium reactors start from the moment thorium is mined and purified.
text: Thorium is mainly mined from different minerals like thorite, thorianite, and monazite which is a by-product of mining of rare earth minerals.
text: Thorium can be strip mined and it could be deep mined.