eCite Digital Repository

Evidence for solution collapse of a magmatic-hydrothermal breccia complex at the Lihir gold deposit, Papua New Guinea

Citation

Sykora, S and Cooke, DR and Selley, D and Harris, AC, Evidence for solution collapse of a magmatic-hydrothermal breccia complex at the Lihir gold deposit, Papua New Guinea, Society for Geology Applied to Mineral Deposits Conference 2015, 24-27 August 2015, Nancy, France, pp. 365-368. (2015) [Refereed Conference Paper]


Preview
PDF
Restricted - Request a copy
6Mb
  

Copyright Statement

Copyright unknown

Abstract

The Lihir deposit is the largest known alkalic gold deposit in the world, and the one of the best examples of a telescoped epithermal-porphyry system. Lihir contains volcanic magmatic and hydrothermal breccia complexes in the core of a sector-collapsed volcanic edifice, however, their relationships to porphyry and overprinting epithermal mineralization remains enigmatic. Detailed pit mapping has revealed a deep-seated, biotite-anhydrite-cemented, matrix-rich magmatic-hydrothermal breccia complex in the Lienetz ore zone. This study on the internal textures and external geometry reveals a history of early magmatic-hydrothermal brecciation and veining, followed by solution collapse promoted by anhydrite dissolution. Near the upper-levels of the beccia complex, open-space cavities were created by solution collapse and partly sealed by high-grade epithermal-style gold mineralization with associated bladed anhydrite and quartz.

Item Details

Item Type:Refereed Conference Paper
Keywords:solution collapse, hydrothermal breccia, Lihir, gold, porphyry, epithermal, magmatic-hydrothermal breccia,
Research Division:Earth Sciences
Research Group:Geology
Research Field:Ore Deposit Petrology
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Other Mineral Resources (excl. Energy Resources)
Objective Field:Mineral Resources (excl. Energy Resources) not elsewhere classified
Author:Sykora, S (Ms Stephanie Sykora)
Author:Cooke, DR (Professor David Cooke)
Author:Selley, D (Dr David Selley)
ID Code:101266
Year Published:2015
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2015-06-15
Last Modified:2017-11-02
Downloads:0

Repository Staff Only: item control page