Granitoid-hosted, orogenic gold mineralization: Genetic constraints on the world-class Archean Gruyere gold deposit, Yilgarn Craton, Western Australia

被引：0

作者：

Schreefel, Ravi ^{[1
]}

Hagemann, Steffen G. ^{[1
]}

Davy's, Clayton ^{[2
]}

Robinson, Jamie A. ^{[3
]}

Roberts, Malcolm P. ^{[4
]}

Fisher, Christopher M. ^{[1
]}

Thebaud, Nicolas ^{[1
]}

Creaser, Robert A. ^{[5
]}

机构：

[1] Univ Western Australia, Sch Earth Sci, Ctr Explorat Targeting, Perth, Australia

[2] Hamelin Gold Ltd, Perth, Australia

[3] Gold Rd Resources Ltd, Perth, Australia

[4] Univ Western Australia, Ctr Microscopy Characterisat & Anal, Perth, Australia

[5] Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada

来源：

17TH BIENNIAL SGA MEETING, 2023, VOL 2 | 2023年

关键词：

SYSTEMATICS;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

In 2013, the 6.8 Moz Gruyere gold deposit was discovered at the eastern margin of the Yilgarn Craton in Western Australia. Gold mineralization at Gruyere is hosted by the 2830 +/- 4 Ma Gruyere monzogranite. Mineralizationis related to contemporaneous chlorite-rich veinlets and sheeted quartz veins crosscutting the foliation, with pervasive wall rock alteration characterized by quartz-sericite-albite-calcite-chlorite +/- pyritepyrrhotite-arsenopyrite -gold-telluride assemblages. Chlorite and arsenopyrite geothermometry indicate temperatures between 304-365 degrees Cand 360-425 degrees C, respectively. Arsenopyrite Re-Os geochronology yield a single-analysis model age of 2675 +/- 66 Ma. On the basis of these results, gold mineralization at Gruyere is interpreted to reflect a late-Archean, granitoid-hosted, orogenic gold mineral system, with the granitic intrusion behaving as a brittle, rigid body within more ductile, soft supracrustal rocks during mineralization. This implies that the 2675-2630 Ma orogenic gold mineralization event in the Yilgarn Craton was widespread and extends into the easternmost exposed part of the craton.

引用

页码：224 / 227

页数：4

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