Editing Iron ore (section)

===Magmatic magnetite ore deposits===
[[Granite]] and [[ultrapotassic]] [[igneous rock]]s were sometimes used to segregate [[magnetite]] crystals and form masses of magnetite suitable for economic concentration.<ref>{{Cite journal |last1=Jonsson |first1=Erik |last2=Troll |first2=Valentin R. |last3=Högdahl |first3=Karin |last4=Harris |first4=Chris |last5=Weis |first5=Franz |last6=Nilsson |first6=Katarina P. |last7=Skelton |first7=Alasdair |date=2013-04-10 |title=Magmatic origin of giant 'Kiruna-type' apatite-iron-oxide ores in Central Sweden |journal=Scientific Reports |language=en |volume=3 |issue=1 |page=1644 |doi=10.1038/srep01644 |pmid=23571605 |pmc=3622134 |bibcode=2013NatSR...3E1644J |issn=2045-2322 |doi-access=free}}</ref> A few iron ore deposits, notably in [[Chile]], are formed from [[volcanic]] flows containing significant accumulations of magnetite [[phenocryst]]s.<ref name="ChileIronOxideLava">{{cite journal |last1=Guijón |first1=R. |last2=Henríquez |first2=F. |last3=Naranjo |first3=J.A. | url=https://www.researchgate.net/publication/241044499 | title=Geological, Geographical and Legal Considerations for the Conservation of Unique Iron Oxide and Sulphur Flows at El Laco and Lastarria Volcanic Complexes, Central Andes, Northern Chile | journal=Geoheritage | year=2011 | volume=3 | issue=4 | pages=99–315 | doi=10.1007/s12371-011-0045-x|bibcode=2011Geohe...3..299G | s2cid=129179725 }}</ref>