挥发分对稀土成矿的意义——以山东微山和薛庄碱性岩体为例

曾曦; 范宏瑞; 邹心宇; 朱昱升; 黄永树; 兰君; 李晓春

doi:10.3799/dqkx.2025.220

Volume 51 Issue 2

Feb. 2026

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Article Navigation > Earth Science > 2026 > 51(2): 462-476

Zeng Xi, Fan Hongrui, Zou Xinyu, Zhu Yusheng, Huang Yongshu, Lan Jun, Li Xiaochun, 2026. Significance of Volatiles for Rare-Earth Mineralization: Insights from the Weishan and Xuezhuang Alkaline(-Carbonatite) Complexes, Shandong Province. Earth Science, 51(2): 462-476. doi: 10.3799/dqkx.2025.220

Citation:

Zeng Xi, Fan Hongrui, Zou Xinyu, Zhu Yusheng, Huang Yongshu, Lan Jun, Li Xiaochun, 2026. Significance of Volatiles for Rare-Earth Mineralization: Insights from the Weishan and Xuezhuang Alkaline(-Carbonatite) Complexes, Shandong Province. Earth Science, 51(2): 462-476. doi: 10.3799/dqkx.2025.220

Citation:

Zeng Xi, Fan Hongrui, Zou Xinyu, Zhu Yusheng, Huang Yongshu, Lan Jun, Li Xiaochun, 2026. Significance of Volatiles for Rare-Earth Mineralization: Insights from the Weishan and Xuezhuang Alkaline(-Carbonatite) Complexes, Shandong Province. Earth Science, 51(2): 462-476. doi: 10.3799/dqkx.2025.220

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Significance of Volatiles for Rare-Earth Mineralization: Insights from the Weishan and Xuezhuang Alkaline(-Carbonatite) Complexes, Shandong Province

doi: 10.3799/dqkx.2025.220

Zeng Xi^{1
,
,},
Fan Hongrui^{1, 2},
Zou Xinyu¹,
Zhu Yusheng^{1, 2},
Huang Yongshu¹,
Lan Jun³,
Li Xiaochun^{1, 2
,
,}

1.
State Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2.
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
3.
Shandong No.5 Exploration Institute of Geology and Mineral Resources, Taian 271000, China

Received Date: 2025-04-23
Publish Date: 2026-02-25

Abstract

Abstract

Alkaline-carbonatite complexes host more than half of the world's rare-earth element (REE) resources. However, the key factors controlling REE fertility remain uncertain. In this study, we present petrography, whole-rock geochemistry, feldspar and apatite compositions, and Sr-Nd isotopes for the coeval Weishan and Xuezhuang alkaline (-carbonatite) complexes along the southeastern margin of the North China Craton. The Weishan complex is REE-mineralized, whereas the Xuezhuang complex is barren. Syenites from the two complexes show similar isotopic compositions, with (⁸⁷Sr/⁸⁶Sr)_t = 0.707 297~0.709 173 and ε_Nd(t)~+8.4, suggesting derivation from a common enriched lithospheric mantle source. In contrast, the Weishan complex contains more volatile-bearing minerals (fluorite, barite, apatite, and calcite) and displays distinct geochemical features, including lower CaO and P₂O₅ contents but higher Sr, Ba, Th, and U relative to Xuezhuang. Feldspar from Weishan shows lower Ca contents (lower anorthite component), and apatite has higher F contents. These mineralogical and geochemical differences indicate a higher volatile budget in the Weishan magma system, which promoted more advanced magmatic differentiation and ultimately facilitated REE mineralization.
- volatiles,
- rare-earth mineralization,
- alkaline-carbonatite complex,
- Weishan complex,
- magmatic evolution,
- mineral deposit

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References(45)

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