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In situ strontium and sulfur isotope investigation of the Ni-Cu-(PGE) sulfide orebearing Kevitsa intrusion, northern Finland. Mineralium Deposita 53 (7) , pp. Abstract 19 The ~2.06 Ga Kevitsa mafic-ultramafic intrusion in northern Finland, hosts a large disseminated Ni-20 Cu-PGE deposit. The deposit occurs in the ultramafic olivine-pyroxene cumulates and show a 21 range in Ni tenors varying from 4-7 wt% (regular ore) to >10 wt% (Ni-PGE ore). There are also a 22 39 emplacement. Cannibalization of early-formed sulfides by later magma injections may have been 40 important in the formation of the economic ore deposit. 41 126 127 128 129 Kevitsa intrusion and its ore types 130 131 The Kevitsa intrusion is composed of an approximately 1.5-km-thick ultramafic lower part and a 132 gabbroic upper part with a minor amount of granophyre on top (Mutanen 1997; Fig. 1). The 133 maximum thickness of the gabbroic succession at the current erosional level exceeds 500 m. In 134

This guidebook on the gold and magmatic Cu-Ni-PGE deposits of Lapland highlights deposit characteristics, their diversity, and temporal and spatial relationships. The tectonic setting and relationship to the general geodynamic evolution of the Fennoscandian Shield are examined as well. In addition, deposit-scale controls and structural features are considered to understand the ore genesis. Areas covered include the Portimo Layered Complex, Kevitsa intrusion, Pahtavaara gold mine, Sakatti deposit, Risti and Launi gold projects, Mustajärvi orogenic gold occurrence, Suurikuusikko gold deposit (Kittilä mine), and Rjapalot gold-cobalt project.

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