Creasy arrived in Australia in the 1960s, and trained as a mining engineer.
He has developed various mining projects in Western Australia and other states.
By 2010 his net worth was claimed to be $283 million (AU).
Creasy had discovered the Bronzewing Gold Mine, and had sold the mine in the 1990s. By the early 2000s he had had a ten-year-long legal battle over Bronzewing South tenements with rival Leith Beal.
Many journalists fall back on terms such as Midas, and prospector, when describing Creasy's wealth and achievement in finding and investing in resources. Creasy pledged A$500,000 towards the construction of a statue called Ascalon in Cathedral Square, Perth, and also contributed towards floating rocks in fountains in Forrest Place and the Carlisle operations of the Department of Mines Industry Regulation and Safety.[citation needed]
At the age of 74 in 2018, Creasy made claims of not retiring, but reducing investments and activities. He also has been identified as being very private, despite occasional insights from newspaper articles and avoiding media exposure, despite the very public controversies around The Cliffe. Creasy has also supported publication of historical materials about Western Australian history.
Creasy has stakes in between 40-50 listed companies, most of which are junior explorers.
↑"Mark Creasy", Australasian Business Intelligence, COMTEX News Network, Inc: 1008144i7772, 24 May 2002, ISSN1320-6680
↑Jones, Faye (April 2001). "Mark Creasy - Prospector"(PDF). The Pick and Shovel: Newsletter of the Australian Prospectors and Miners Hall of Fame (14). Archived from the original(PDF) on 30 September 2009.
↑"How the Rich 200 invest: Mark Creasy", Australasian Business Intelligence, COMTEX News Network, Inc, 4 July 2010, ISSN1320-6680
↑"Creasy gets short shrift as Beal celebrates, again", Australasian Business Intelligence, COMTEX News Network, Inc: 1008297i3497, 24 October 2001, ISSN1320-6680
↑"Creasy loses gold fight", Australasian Business Intelligence, COMTEX News Network, Inc: 1008319i3497, 15 November 2002, ISSN1320-6680
↑Treadgold, Tim (2 May 2002), "'Midas' Mark Creasy to go public.(private Australian explorer, Mark Creasy, is turning to the stock market)", BRW, 24 (17): 43(1), ISSN0727-758X
↑"Prospector ties lead Creasy to Sweden and Talga's graphite", Australasian Business Intelligence, COMTEX News Network, Inc, 27 October 2013, ISSN1320-6680
↑Andrews, Mark (December 2015), "Creasy not done yet", Australia's Paydirt, 1 (234): 10–12, ISSN1445-3436
↑"Sirius's Creasy set to join billionaire's club", Australasian Business Intelligence, COMTEX News Network, Inc, 6 March 2013, ISSN1320-6680
↑Pownall, Mark (9 September 2016). "11. Mark Creasy". Business News. Retrieved 17 November 2020.
↑"Mining magnate calls it a day on Triffids' house", Australasian Business Intelligence, COMTEX News Network, Inc, 19 July 2009, ISSN1320-6680
↑Cameron, James McDonald Rapson; Creasy, Mark G. (2019), "To the golden land: exploration to the Eastwards 1869 - 1896", in Bridge, Peter John (ed.), Western Australian Explorers's Diaries Project, Hesperian Press, ISBN978-0-85905-704-2{{citation}}: CS1 maint: date and year (link)