GEOCHEMISTRY AND GENESIS OF SHENGMIKENG LEAD-ZINC DEPOSIT IN NORTHERN WUYI, EASTERN CHINA

LUO Ping; WU Gan-guo; ZHANG Da; DI Yong-jun; WANG Chang-min; WANG Yong-qin

Volume 15 Issue 4

Dec. 2009

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Article Navigation > Journal of Geomechanics > 2009 > 15(4): 349-362

2019. Inside Cover. Journal of Geomechanics, 25 (6): 封二-封二.

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LUO Ping, WU Gan-guo, ZHANG Da, et al., 2009. GEOCHEMISTRY AND GENESIS OF SHENGMIKENG LEAD-ZINC DEPOSIT IN NORTHERN WUYI, EASTERN CHINA. Journal of Geomechanics, 15 (4): 349-362.

2019. Inside Cover. Journal of Geomechanics, 25 (6): 封二-封二.

Citation:

LUO Ping, WU Gan-guo, ZHANG Da, et al., 2009. GEOCHEMISTRY AND GENESIS OF SHENGMIKENG LEAD-ZINC DEPOSIT IN NORTHERN WUYI, EASTERN CHINA. Journal of Geomechanics, 15 (4): 349-362.

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GEOCHEMISTRY AND GENESIS OF SHENGMIKENG LEAD-ZINC DEPOSIT IN NORTHERN WUYI, EASTERN CHINA

LUO Ping^{1, 2, 3
,},
WU Gan-guo^{1, 2},
ZHANG Da^{1, 2},
DI Yong-jun^{1, 2},
WANG Chang-min^{1, 2},
WANG Yong-qin³

1.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
2.
Key Laboratory of Lithosphere Structure, Deep Process and Detection Technology, Ministry of Education, China University of Geosciences, Beijing 100083, China
3.
Northeastern Jiangxi Geological Party, Bureau of Geology and Mineral Resources of Jiangxi Province, Shangrao 334000, Jiangxi, China

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Abstract

Abstract

The Shengmikeng vein-type lead-zinc deposit is located in Huanggangshan volcano-tectonic depression of the Mesozoic volcanic belt in Northern Wuyi.The ore featured by veinlets and disseminations is hosted both inside the fault zone in the upper Jurassic Ehuling ignimbrite and the potassic trachyte porphyry. Geochemical characteristics indicate S-type granites and volcanic rocks depleted in sodium and enriched in potassium, with 62.42%~78.02% w(SiO₂), 7.66%~9.13% w(K₂O+Na₂O), 1.18~2.62 w(K₂O)/w(Na₂O), and Rittmann index δ of 1.67~3.78. They are enriched in LREE with an average LREE/HREE ratio of 10.94×10^-6, and generally depleted Eu with an minimum δEu less than 0.31 especially in the ignimbrite and biotite granite, which have experienced a significant process of separation and crystallization of plagioclases. ΣREE at the main stage of the magmatic activity decreases with time. From the point of the ΣREE, δEu, geochemical parameters and standard REE distribution patterns, lead-zinc mineralization altered rocks in the Shengmikeng deposit have close genetic relationship with the potassic trachyte porphyry with SHRIMP zircon age of 138.3±1.4 Ma. It is suggested that the deposit was formed in the early Cretaceous period during Yanshanian and is of sub-volcanic hydrothermal type.
- Shengmikeng Lead-zinc deposit,
- potassic trachyte porphyry,
- geochemistry,
- metallogenesis,
- Northern Wuyi

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