Geology and mineralisation of the Endeavour 41 gold deposit, Cowal district, NSW, Australia ...

• Main Author: Zukowski, W
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Endeavour; Macquarie Island
• Online Access: https://dx.doi.org/10.25959/23206439.v1; https://figshare.utas.edu.au/articles/thesis/Geology_and_mineralisation_of_the_Endeavour_41_gold_deposit_Cowal_district_NSW_Australia/23206439/1

Epithermal and porphyry styles of alteration and mineralisation occur at the Endeavour 41 (E41) gold deposit in the Cowal Igneous Complex, New South Wales, Australia. E41 is one of three economically significant gold centres (E46, E42 and E41) in the Cowal district. These deposits formed within the Ordovician Macquarie island arc by subduction-related processes, and are hosted by a subaqueous volcano-sedimentary succession of interbedded sedimentary and resedimented volcaniclastic facies, trachyandesite and porphyritic andesites. The volcanic facies architecture at E41 is consistent with a distal submarine volcanic setting. The host succession at E41 has been intruded by numerous sills, dykes and stocks, which defi ne the E41 intrusive complex. The magmas evolved from mafic to more felsic and then back to mafic compositions with time. There is evidence of both mafic and silicic magmatism of high-K to shoshonitic affinity at the time of gold mineralisation, consistent with an alkalic association for gold ...