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      <marc:subfield code="a">Targeted Geoscience Initiative 4 : </marc:subfield>
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      <marc:subfield code="a">"The Canadian Ni-Cu-PGE-Cr ore systems project, under the fourth phase of the Targeted Geoscience Initiative (TGI-4), spanned a breadth of ore deposit types, tectonic environments (crustal boundaries, suprasubduction zones, astrobleme, intracratonic rift), and processes of formation (magmatic to hydrothermal). This report summarizes key project activities for six mineral districts completed by a collaborative group of more than fifty contributors from the GSC, four provincial geological surveys, academia, and industry to develop and refine genetic models and exploration techniques to determine fertility and pathfinders"--Abstract, page 3.</marc:subfield>
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