Editing Sphalerite (section)

=== Mississippi-Valley type ===
Similar to SEDEX, Mississippi-Valley type (MVT) deposits are also a Pb-Zn deposit which contains sphalerite.<ref>{{Citation|last=Misra|first=Kula C.|title=Mississippi Valley-Type (MVT) Zinc-Lead Deposits|date=2000|url=http://dx.doi.org/10.1007/978-94-011-3925-0_13|work=Understanding Mineral Deposits|pages=573–612|place=Dordrecht|publisher=Springer Netherlands|doi=10.1007/978-94-011-3925-0_13|isbn=978-94-010-5752-3|access-date=2021-03-26}}</ref> However, they only account for 15–20% of zinc and lead, are 25% smaller in tonnage than SEDEX deposits and have lower grades of 5–10% Pb + Zn.<ref name="Arndt-2015"/> MVT deposits form from the replacement of carbonate host rocks such as dolostone and limestone by ore minerals; they are located in platforms and foreland thrust belts.<ref name="Arndt-2015"/> Furthermore, they are stratabound, typically Phanerozoic in age and epigenetic (form after the lithification of the carbonate host rocks).<ref name="Haldar-2020">{{Citation|last=Haldar|first=S.K.|title=Mineral deposits: host rocks and genetic model|date=2020|url=http://dx.doi.org/10.1016/b978-0-12-820585-3.00009-0|work=Introduction to Mineralogy and Petrology|pages=313–348|publisher=Elsevier|doi=10.1016/b978-0-12-820585-3.00009-0|isbn=978-0-12-820585-3|s2cid=226572449|access-date=2021-03-26}}</ref> The ore minerals are the same as SEDEX deposits: sphalerite, galena, pyrite, pyrrhotite and marcasite, with minor sulfosalts.<ref name="Haldar-2020" /> Mines that contain MVT deposits include Polaris in the Canadian arctic, Mississippi River in the [[United States]], Pine Point in Northwest Territories, and Admiral Bay in Australia.<ref>{{Cite journal|last=Sangster|first=D F|date=1995|title=Mississippi valley-type lead-zinc|doi=10.4095/207988|doi-access=free}}</ref>