Nuveen New York Quality Municipal Income Fund V.NAN

LARGELY IN COMPARISON TO SUDBURY BASIN

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The Maniitsoq area is underlain predominantly by highly deformed and metamorphosed Archean gneisses. Supracrustal rocks comprise about 10% of the area and consist mainly of amphibolite. Most of the nickel discovered to date is associated with younger, undeformed nickel and copper-bearing norite intrusions that are concentrated in the 15 km wide by 75 km long Greenland Norite Belt (GNB). These intrusions range in size from small dykes and plugs to elongated bodies covering up to 8 square km (such as the Fossilik intrusion discovered in 2013 drilling). Xenoliths of crushed orthogneiss and fluidised microbreccia indicate they postdate an impact event and they are believed to represent open ended magma conduits. Mantle melting was in response to a giant impact event (the Maniitsoq Structure) which is the remains of a gigantic, 3 billion year old meteorite impact event. Sulphide mineralization consists of monoclinic pyrrhotite, pentlandite, chalcopyrite and pyrite. Inclusion-bearing sulphide (i.e. solid sulphide matrix with fragments of host rock) is a common texture. Disseminated, blebby, net texture and vein sulphides are also common. - See more at: https://northamericannickel.com/projects/greenland/maniitsoq/default.aspx#sthash.76ueguyx.dpuf

Norite occurs with gabbro and other mafic to ultramafic rocks in layered intrusions which are often associated with platinumorebodies such as in the Bushveld Igneous Complex in South Africa, the Skaergaard igneous complex of Greenland, and the Stillwater igneous complex in Montana, USA.

Norite is also the basal igneous rock of the Sudbury Basin complex in Ontario, which is the site of a meteorite impact and the world's second-largest nickel mining region.