U-Pb Geochronology and Trace Element Analysis of Titanite from the Diaoquan Porphyry-Skarn Polymetallic Deposit, North China: Implication for Cu-Ag-Mo Mineralization

被引：1
作者：
Deng X. [1 ,2 ]
Deng X. [1 ,2 ]
Zhang L. [3 ,4 ]
Gao W. [1 ,3 ]
Li Y. [1 ]
Yang H. [4 ]
Li Z. [4 ]
机构：
[1] State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan
[2] PetroChina Tarim Oilfield Company, Korla
[3] School of Earth Resources, China University of Geosciences, Wuhan
[4] Zijin Mining Group Co.，Ltd., Xiamen
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 09期
关键词：
Diaoquan polymetallic deposit; geochemistry; hydrothermal titanite; petrology; porphyry-skarn mineralization; U-Pb dating;
D O I：
10.3799/dqkx.2022.347
中图分类号：
学科分类号：
摘要：
The Diaoquan deposit is a typical porphyry-skarn polymetallic deposit in the Wutaishan-Hengshan metallogenic district, North China. However, the relationship between porphyry and skarn mineralization processes have been the subject of intense debate. In this paper, in-situ laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has been applied to U-Pb isotope and trace elements analysis of the zircon and titanite from granitic porphyry, biotite - quartz monzonite, and mineralized skarn. Zircons from biotite - quartz monzonite and granitic porphyry have weighted mean U - Pb ages of 137.3± 1.2 Ma and 133.5±2.0 Ma, respectively. The age of granitic porphyry is consistent with the hydrothermal titanite U-Pb ages (133.6±2.2 Ma and 132.8±2.5 Ma) of the mineralized skarn, suggesting the Cu - Ag skarn mineralization at the Diaoquan deposit was caused by coeval magmatism that related to the emplacement of granitic porphyry. The variation of Sn contents in titanite from the Diaoquan deposit suggest the oxygen fugacity of hydrothermal mineralization fluids significantly increase at prograde skarn stage, and then slightly decreased at retrograde skarn stage. © 2023 China University of Geosciences. All rights reserved.
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页码：3327 / 3341
页数：14
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