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Vectors to mineralization in the carbonate-hosted Grasberg-Ertsberg porphyry district from calcite C-O isotope and trace element geochemistry
Citation
Thompson, JA and Baker, M and Cooke, DR and Leys, C and Chen, H, Vectors to mineralization in the carbonate-hosted Grasberg-Ertsberg porphyry district from calcite C-O isotope and trace element geochemistry, Proceedings of the 14th SGA Biennial Meeting: Mineral Resources to Discover, 20-23 August 2017, Quebec City, Canada, pp. 1107-1110. ISBN 9782981689801 (2017) [Refereed Conference Paper]
Copyright Statement
Copyright 2017 Society for Geology Applied to Mineral Deposits
Official URL: https://e-sga.org/publications/
Abstract
Trace element analyses of calcite veins, marbles, and skarn in the Grasberg-Ertsberg district reveal distinctive characteristics in distal and proximal skarn and porphyry environments. C-O isotopic values correlate with trace element variations and both can be attributed to magmatic fluid mixing with rock-buffered meteoric waters. A negative correlation is observed between δ18O and Mn:Mg values, which change systematically towards the center of the Grasberg Intrusive Complex (GIC). Evidence for fluid migration for up to 5km away from the GIC along permeable fracture and fault networks is indicated by magmatic-hydrothermal signatures in distal calcite vein chemistry. Isotopic and trace element analyses of calcite present a new and potentially effective tool for the detection of porphyry deposits in carbonate-hosted terrains which to date have proven challenging to explore.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | carbon, oxygen, isotopes, porphyry, copper, gold, Grasberg, calcite |
| Research Division: | Earth Sciences |
| Research Group: | Geology |
| Research Field: | Resource geoscience |
| Objective Division: | Mineral Resources (Excl. Energy Resources) |
| Objective Group: | Mineral exploration |
| Objective Field: | Precious (noble) metal ore exploration |
| UTAS Author: | Thompson, JA (Mrs Jennifer Thompson) |
| UTAS Author: | Baker, M (Dr Michael Baker) |
| UTAS Author: | Cooke, DR (Professor David Cooke) |
| ID Code: | 122940 |
| Year Published: | 2017 |
| Funding Support: | Australian Research Council (IH130200004) |
| Deposited By: | CODES ARC |
| Deposited On: | 2017-12-06 |
| Last Modified: | 2018-07-23 |
| Downloads: | 0 |
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