Dr. Daniel Marshall


Dr. Daniel Marshall


Julian Boldy Geological Society Service Award


CIM Distinguished Lecturers

Dan Marshall is the lead author on the Ore Mineral Atlas (2011, 2005) and has published a variety of peer reviewed papers on ore and gem deposits worldwide. He has 25 years of experience studying the petrology and petrogenesis of ore deposits. He has taught courses on ore deposits, fluid inclusions, ore petrology, gems and geochemistry at Simon Fraser and Carleton University as well as to industry. He has also acted as consultant for a number of exploration companies, and been principal investigator on Industry-Academia-Government projects. 

Distinguished Lecturer 2016-17

Lecture Abstract


Melt inclusions of native-silver and native-bismuth at Cobalt, Ontario. Model for native-metal enrichments comparing natural samples with experimental and in-situ studies

Cobalt, Ontario is renowned for the 12.6 billion grams (445 million ounces) of silver produced from the area since its discovery in 1903. Based on our studies of natural and synthetic systems we are able to formulate a new model for silver transport, deposition and enrichment based on immiscible systems of molten precious metals and hyper-saline brines. These observations are consistent with silver inside these solid-silver inclusions melting at approximately 300 to 350 °C.