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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

journal contribution
posted on 2023-05-20, 23:44 authored by Zhang, T, Zhang, D, Leonid Danyushevsky, Wu, M, Koffi Alexis, N, Liao, Y, Zhang, J
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.

Funding

Australian Research Council

AMIRA International Ltd

BHP Billiton Ltd

Newcrest Mining Limited

History

Publication title

Ore Geology Reviews

Volume

127

Article number

103804

Number

103804

Pagination

1-16

ISSN

0169-1368

Department/School

School of Natural Sciences

Publisher

Elsevier Science Bv

Place of publication

Po Box 211, Amsterdam, Netherlands, 1000 Ae

Rights statement

© 2020 Elsevier B.V. All rights reserved.

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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