表面铁膜主导的丹霞红：我国南方典型丹霞地层铁的赋存状态研究

刘振康; 倪凤娟; 黎广荣; 郭福生; 王超; 朱素雯; 秦澳; 刘富军; 陈留勤

doi:10.3799/dqkx.2025.222

Volume 51 Issue 2

Feb. 2026

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Liu Zhenkang, Ni Fengjuan, Li Guangrong, Guo Fusheng, Wang Chao, Zhu Suwen, Qin Ao, Liu Fujun, Chen Liuqin, 2026. Danxia Red Caused by Surface Iron Coating: Study on the Occurrence State of Iron in Typical Danxia Strata in Southern China. Earth Science, 51(2): 744-755. doi: 10.3799/dqkx.2025.222

Citation:

Liu Zhenkang, Ni Fengjuan, Li Guangrong, Guo Fusheng, Wang Chao, Zhu Suwen, Qin Ao, Liu Fujun, Chen Liuqin, 2026. Danxia Red Caused by Surface Iron Coating: Study on the Occurrence State of Iron in Typical Danxia Strata in Southern China. Earth Science, 51(2): 744-755. doi: 10.3799/dqkx.2025.222

Citation:

Liu Zhenkang, Ni Fengjuan, Li Guangrong, Guo Fusheng, Wang Chao, Zhu Suwen, Qin Ao, Liu Fujun, Chen Liuqin, 2026. Danxia Red Caused by Surface Iron Coating: Study on the Occurrence State of Iron in Typical Danxia Strata in Southern China. Earth Science, 51(2): 744-755. doi: 10.3799/dqkx.2025.222

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Danxia Red Caused by Surface Iron Coating: Study on the Occurrence State of Iron in Typical Danxia Strata in Southern China

doi: 10.3799/dqkx.2025.222

Liu Zhenkang^{1
,
,},
Ni Fengjuan¹,
Li Guangrong^{1, 2, 4
,
,
,},
Guo Fusheng¹,
Wang Chao³,
Zhu Suwen¹,
Qin Ao¹,
Liu Fujun¹,
Chen Liuqin¹

1.
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
2.
National Key Laboratory of Uranium Resource Exploration and Nuclear Remote Sensing, Nanchang 330013, China
3.
Guangdong Nonferrous Mine Geological Disaster Prevention and Control Center, Guangzhou 510080, China
4.
State Key Laboratory of Endogenetic Metallic Deposit Metallogenic Mechanism, Nanjing University, Nanjing 210093, China

Received Date: 2025-06-19
Publish Date: 2026-02-25

Abstract

Abstract

Danxia landform is widely developed in southern China, and its red feature is one of the main distinguishing marks of landform. Previous research results have shown that the red color of Danxia landforms is related to iron in the strata, but no in-depth study has been conducted on the state of iron occurrence. In this paper, the mineral composition, geochemistry and iron occurrence of samples from Danxia Mountain in Guangdong Province and Longhu Mountain in Jiangxi Province are studied. The results show that: (1)The Danxia landform stratigraphic samples in Guangdong Province and Longhu Mountain in Jiangxi Province show that the main mineral composition is quartz and feldspar, containing a small amount of clay and iron oxides, with a high degree of consolidation, and some layers contain gravel. (2) Geochemical analysis shows that the content of SiO₂ in both is the highest, followed by Al₂O₃. The content of TFe₂O₃ (0.81%~1.63%) and FeO (0.08%~0.16%) is lower, indicating that the content of iron minerals is not the main factor causing redness. (3)The iron in the Danxia Formation of Danxia Mountain in Guangdong and Longhu Mountain in Jiangxi mainly exists in the form of clay iron and oxide iron, among which trivalent iron ions (oxides-Fe³⁺: 41.3% and 44.3%, clay-Fe³⁺: 49.7% and 47.6%) are much higher than the content of divalent iron ions (clay-Fe²⁺: 9.0% and 8.1%). All indicate that the content of iron in the Danxia Formation is relatively low, but it may be in the form of an iron oxide coating that exists on the surface of minerals such as quartz and feldspar, causing the formation to appearred.
- Danxia landform in southern China,
- mineral composition,
- major element,
- mössbauer spectroscopy,
- occurrence state of iron

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Danxia Red Caused by Surface Iron Coating: Study on the Occurrence State of Iron in Typical Danxia Strata in Southern China

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