David J. Good, Peter C. Lightfoot Received February 5, 2018. Accepted January 30, 2019. Ames DE, Kjarsgaard IM, McDonald AM, Good DJ. 2017. Insights into the extreme PGE enrichment of the W Horizon, Marathon Cu–Pd deposit, Coldwell Alkaline Complex, Canada: platinum-group mineralogy, compositions and genetic implications. Ore Geology Reviews 90: 723-747 Crossref, ISI, Google Scholar. Arndt N. 2013. The Lithospheric mantle plays no active role in the formation of orthomagmatic ore deposits.