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Trace element geochemistry of enargite in the Mankayan district, Philippines
Citation
Deyell, CL and Hedenquist, JW, Trace element geochemistry of enargite in the Mankayan district, Philippines, Economic Geology and The Bulletin of The Society of Economic Geologists, 106, (8) pp. 1465-1478. ISSN 0361-0128 (2011) [Refereed Article]
Copyright Statement
Statement: © 2011 Society of Economic Geologists, Inc. Society of Economic Geologists, 7811 Shaffer Parkway, Littleton, CO 80127, USA
DOI: doi:10.2113/econgeo.106.8.1465
Abstract
We report the first laser ablation-inductively coupled plasma-mass spectroscopy (LA-ICP-MS) study of trace element substitution in enargite. Results indicate significant variability in the composition of enargite samples
from a single ore system. Samples come from the Mankayan district, Philippines, which hosts the Lepanto high-sulfidation Cu-Au deposit, now mined out, and the adjacent Far Southeast porphyry Cu-Au deposit; the genetic relationship between these deposits has been documented in previous studies. LA-ICP-MS analyses
indicate significant incorporation of Sb and Fe in enargite (locally exceeding 1 wt %). Other elements such as Bi, Sn, Se, Te, Ag, and Zn occur at concentrations exceeding 0.1 wt percent. The distribution of selected trace
elements in enargite correlates with previously published variations in fluid inclusion homogenization and
melting temperatures and gas compositions. The spatial distribution of data indicates enargite is enriched in
Au and Te close to the Far Southeast porphyry. Enargite is enriched in Silver, Fe, and Pb in the center of Lepanto,
and Zn (± Cd) is enrich the ore distal to the Far Southeast porphyry. Locally elevated Sb contents occur
in samples from subsidiary branch vein structures and may indicate that mineralizing fluids along these structures
were modified compared to those that formed the main orebody.
Item Details
Item Type: | Refereed Article |
---|---|
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: | Deyell, CL (Dr Cari Deyell) |
ID Code: | 74865 |
Year Published: | 2011 |
Web of Science® Times Cited: | 29 |
Deposited By: | Centre for Ore Deposit Research - CODES CoE |
Deposited On: | 2011-12-14 |
Last Modified: | 2014-04-30 |
Downloads: | 0 |
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