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Timing of multiple magma events and duration of the hydrothermal system at the Yu'erya gold deposit, eastern Hebei Province, China: Constraints from U-Pb and Ar-Ar dating

Citation

Zhang, T and Zhang, D and Danyushevsky, LV and Wu, M and Koffi Alexis, N and Liao, Y and Zhang, J, Timing of multiple magma events and duration of the hydrothermal system at the Yu'erya gold deposit, eastern Hebei Province, China: Constraints from U-Pb and Ar-Ar dating, Ore Geology Reviews, 127 Article 103804. ISSN 0169-1368 (2020) [Refereed Article]

Copyright Statement

© 2020 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.oregeorev.2020.103804

Abstract

The Yu’erya deposit is a large granite–hosted gold deposit in the eastern Hebei Province classified as an intrusion–related gold system. The Yu’erya complex contains the causative intrusion which was the source of hydrothermal metal-bearing fluids. This composite granite complex contains miarolitic pegmatite(–like) cavities and pegmatite veins. A combination of detailed field observations and U–Pb dating by SHRIMP and LA–ICP–MS is used to document multiple magmatic events which occurred at 210–220, 175–173, 171–170, 167–166 and ∼161 Ma formed the Yu’erya granite complex. The initiation of the hydrothermal system, as determined via Ar–Ar dating, is closely related to the exsolution of a magmatic volatile phase from the G1 granite at ca.176 Ma. The hydrothermal system operated for ∼16 my (176–160 Ma) and produced multiple mineralising events (∼176, 172–168 and 162–160 Ma) linked to emplacement of repeated magma pulses from 175 Ma to 161 Ma. Our results suggest that multiple magmatic–hydrothermal events over a time period of several million years may be a fundamental factor responsible for the enrichment process during formation of intrusion-related gold deposits and thus may be a requirement for forming economic orebodies.

Item Details

Item Type:Refereed Article
Keywords:geochronology, intrusion–related gold deposit, multiple magmatic–hydrothermal events, Yu’erya gold deposit
Research Division:Earth Sciences
Research Group:Geology
Research Field:Resource geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Danyushevsky, LV (Professor Leonid Danyushevsky)
ID Code:144705
Year Published:2020
Funding Support:Australian Research Council (IH130200004)
Deposited By:CODES ARC
Deposited On:2021-06-06
Last Modified:2021-08-10
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