Zajkan intermediate-sulfidation epithermal deposit, NW Iran: Mineral paragenesis, fluid inclusion, and oxygen-sulfur isotope

作者

Hossein Kouhestani¹ , Mir Ali Asghar Mokhtari¹ , Kezhang Qin² , Junxing Zhao²

1. University of Zanjan
2. Institute of Geology and Geophysics, Chinese Academy of Sciences

会议/活动

International Earth Science Colloquium On The Aegean Region, October 2019 (Izmir, Turkey)

海报摘要

Zajkan deposit occurs as quartz-base metal sulfide veins hosted by the Eocene Karaj Formation. Four stages of ore formation are identified at Zajkan. Microthermometric measurements indicate that the veins were formed at temperatures between 217 and 273 °C from fluids with salinities between 1.7 and 6.4 wt.% NaCl equiv. The oxygen isotopic compositions (δ18Owater of +3.7 to +1.1‰) indicate that the ore-forming fluids were mainly derived from magmatic water with the input of meteoric water in the later ore-stages. Sulfur isotopic values of sulfide minerals vary over a narrow range from –5.0 to –0.9‰ (averaging −2.2‰), suggesting that sulfur was derived from a homogeneous magmatic source. The fluid inclusion and stable isotope data indicate that fluid boiling and mixing facilitated hydrothermal alteration and mineralization at Zajkan. Our data suggest that the Zajkan deposit is an intermediate-sulfidation style epithermal mineralization.

关键词

Fluid inclusion, Stable isotopes, Zajkan

研究领域

Earth Sciences

参考文献

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基金

1. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China (No. KLMR2017-01)
2. Vice Chancellor for Research and Technology, University of Zanjan, Zanjan, Iran

补充材料

暂无数据

附加信息

利益冲突

No competing interests were disclosed.

数据可用性声明

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

知识共享许可协议

Copyright © 2024 Kouhestani et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.