Harris, Anthony C., Cuison, Ana Liza G., Chang, Zhaoshan, Cooke, David R., Bonnici, Natalee, Faure, Kevin, and Cross, Cameron (2007) Fe-rich magmatic volatiles in the Ridgeway Au-Cu porphyries: evidence from magnetite-quartz comb-layered textures. In: Proceedings of the 9th Biennial Meeting of the the SGA 2007 (1) pp. 415-418. From: 9th Biennial SGA Meeting: digging deeper, 20-23 August 2007, Dublin, Ireland.

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Abstract

Magnetite (± quartz) comb-layered textures occur in intrusions intimately associated with ore-bearing hydrothermal alteration assemblages at the Ridgeway alkalic porphyry Au-Cu deposit. These magnetite-rich textures imply that extremely Fe-rich magmatic volatiles accumulated within these silicic intrusions. Our micro-textural and micro-analytical study suggests that these Fe-rich magmatic volatiles transported and deposited ore-forming metals (including Cu, Zn, Mo, Pb, and Au). The occurrence of thickly stacked magnetite-quartz comb-layered textures implies that large volumes of these volatiles streamed through the Ridgeway intrusions. Their recognition highlights the specialized nature of the magma suite associated with the formation of an extremely highgrade Au porphyry deposit.

Item ID:	26299
Item Type:	Conference Item (Research - E1)
Keywords:	comb-layered textures, magnetite, prophyry, gold, alkalic, magmatic-hydrothermal
Related URLs:	Organisation
Date Deposited:	20 Jun 2013 06:51
FoR Codes:	04 EARTH SCIENCES > 0403 Geology > 040307 Ore Deposit Petrology @ 100%
SEO Codes:	84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840105 Precious (Noble) Metal Ore Exploration @ 50% 84 MINERAL RESOURCES (excl. Energy Resources) > 8401 Mineral Exploration > 840102 Copper Ore Exploration @ 50%
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