AIG Vic Branch GPIC Presentation and Networking Night – August 2016

Australian Institute of Geoscientists > Events > AIG Vic Branch GPIC Presentation and Networking Night – August 2016

AIG Vic Branch GPIC Presentation and Networking Night – August 2016


AIG Victoria Branch GPIC Presentation and Networking Night – August 2016

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Structural and timing Constraints on molybdenum and tungsten mineralisation at Yea, Victoria

Presented by Ashley Van Krieken

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Date

Thursday  18th August, 2016
Nibblies from 6.30pm, Presentation 7.10pm (approx.)

 

Venue

The Kelvin Club
14-30 Melbourne Pl, Melbourne

 

Presentation Abstract

The molybdenite and scheelite mineralisation in the Native Dog Pluton at Monkey Gully near Yea is hosted within an I-type (post-orogenic) pluton, which shows extensive fractionation and magma mixing, and was emplaced in an extensional environment. The pluton comprises four principal rock types: tonalite, granodiorite, dacite and leucogranite. Emplacement of the pluton was in a compressional northwest to southeast paleostress field. Early extensional quartz veins, related to cooling, are overprinted by both dacitic dykes and late-stage quartz sheeted veins. The late-stage veins host the molybdenum and tungsten mineralisation in the deposit. 206Pb/238U zircon ages of 356 ±14 Ma and 375 ± 22 Ma place pluton formation and mineralisation at the onset of the Kanimblan Orogeny and later than other major molybdenum deposits in Victoria. Key factors governing the source for the granite and its associated mineralisation are: (1) the presence of a highly fractionated and sulfur-rich leucogranite; and (2) the pluton’s location in a regional jog overlying the Selwyn basement block. Finally, a model is developed to explain the differences between this Melbourne Zone molybdenum and tungsten deposit compared with other metallogenic porphyry deposits.

 

About the Presenter

Ashley holds a Bachelor of Economics (Honours) and a Bachelor of Science (Honours) degree and is currently undertaking a PhD looking at characterising mineral systems in Western Victoria using high resolution gravity and magnetic data. He has worked in a number of different industry sectors including economic forecasting and analysis, plastics, chemicals, textiles, fashion, mining and most recently the education sector. In addition to his PhD Ashley is currently employed by John Monash Science School where is responsible for managing the schools strategic partnerships and overseeing the schools Virtual Learning Program – Emerging Sciences Victoria. Outside of his professional roles Ashley has a passion for performance vehicles and classic motorcycles.

 

Costs

To support our Victorian Branch and ongoing future events we kindly ask for a small admission fee from our attendees – $10 Members, $15 Non-Members, Students Free. (Includes one drink voucher for beer, wine or soft drink)

RSVP to this event by emailing us at bookings@aig.org.au.

 

More information

Steven Williamson steve@stevenwilliamson.com.au
Rodney Boucher rodney@linex.com.au
Luke Williamson luke@illira.com.au

Download the event flyer here.