Dr Sean C. Johnson
- Postdoctoral Researcher
Dr. Sean Johnson is a postdoctoral research fellow in the iCRAG Raw Materials spoke. He read Geology for his BSc Hons. at the University of St. Andrews, Scotland before working a mine and exploration geology roles. He completed his PhD on the geochemistry of metalliferous black shales at CODES (the Australian Research Council’s Centre of Excellence in Ore Deposits), under the supervision of Prof. Ross Large. Upon completion, he was appointed as a Research Fellow at CODES conducting R&D on aspects of LA-ICP-MS, managed the elemental analyse labs and taught undergraduate courses in sedimentology, economic geology, mineralogy and marine geoscience.
Sean’s research focusses on the combination of fieldwork and geochemistry on order to understand metal cycling (its source, sinks and processes) in sediments. This work has ready application to the minerals and materials sector but also hydrocarbons, biogeochemistry, and applied environmental chemistry. As such, he has been involved in variety of collaborations across the academic, government, and industry spectrum.
Present in the earth's crust, in oceans, lakes and rivers – sources of copper range from minute trace amounts to rich deposits. Copper is critical element meaning that life needs copper to function properly. In addition, copper is also essential to our society, infrastructure and technologies that we utilise, with demand increasing by over 250% in the last 40 yrs. It is becoming more critical to identify and understand the process that govern the formation of copper in the Earth’s crust and how to fingerprint these processes in order to ensure that we can increase the chances of finding more resources of this important metal.
Project title: Metallogenesis of Cu deposits in Palaeozoic sedimentary rocks, southern Ireland
Much of the work for this project will focus on the copper occurrances across S. Ireland in order to understand their nature and distribution. This project will combine extensive regional fieldwork with state of the art analytical techniques (i.e. LA-ICP-MS, MC-ICP-MS, GC-IRMS, and mineral and trace element geochemistry) in order to understand the formation history of these occurrances, create a local and regional scale paragensis in order to understand and fingerprint timings of mineralising fluids, as well as investigate genetic links between deposits and Zn-Pb in the Irish midlands. Furthermore, this project aims to provide industry with the geochemically fingerprints of the mineralisation events that can be utilised in exploration.
- Postdoctoral Researcher
- Supply of Raw Materials
- Geochemistry, Mineral Exploration, Economic Geology, Chemical Vectoring, Copper Deposits, LA-ICP-MS Mapping