| Citation: | TAI Wenxing，WAN Daxue，DENG Yamei，et al. New advances in exploration and prospecting potential of phosphate deposits in Yushan-Zhongping area, central Guizhou[J]. Bulletin of Geological Science and Technology，2026，45（3）：156-168 doi: 10.19509/j.cnki.dzkq.tb20250344
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The Yushan-Zhongping area is a large concealed phosphate ore concentration area newly discovered in recent years in Central Guizhou. Guizhou Province, as a national strategic reserve base for phosphate ore resources, is currently facing an acute shortage of high-quality phosphate prospecting targets due to the fierce competition in prospecting project approval in the three traditional phosphate ore concentration areas.
This study aims to address the critical dilemma of the scarcity of high-quality phosphate ore prospecting targets in Guizhou Province, and to explore the potential of new high-quality phosphate ore resources in Central Guizhou so as to provide a reliable target support for the new round of prospecting breakthrough strategic actions in the whole province. Based on the recent exploration achievements of phosphate deposits in the Yushan-Zhongping area, this research carries out an in-depth study on the regional phosphate metallogenic potential.
We systematically analyze the spatial variation laws of thickness and grade of the b ore layer of the Yangshui Formation, and conduct a comprehensive study on the burial depth characteristics of ore bodies and the regional metallogenic potential of phosphate deposits. In addition, we carry out a systematic comparative study with two typical phosphate ore concentration areas in Guizhou Province, namely Kaiyang-Xifeng and Weng'an-Fuquan, from the perspectives of metallogenic characteristics, ore layer properties and ore body occurrence laws. On this basis, the prospecting potential of the Yushan-Zhongping area is comprehensively evaluated by combining the regional geological setting and drilling engineering data.
The results show that the Yushan-Zhongping area is located in the transition zone between the "Kaiyang-type" and "Wengfu-type" phosphate deposits in terms of geographical location, metallogenic characteristics and lithofacies paleogeographic environment, and it comprehensively possesses the core metallogenic characteristics of both types of phosphate deposits. The thickness and grade of the b ore layer of the Yangshui Formation in this area show a gradual increasing trend from north to south on the whole, reflecting the optimization of regional metallogenic conditions in the southward direction. From the Yushan-Zhongping area to the southern Weng'an-Fuquan phosphate ore concentration area, the burial elevation of phosphate ore bodies is not continuously decreasing with the extension of the ore belt, but may increase or remain basically unchanged instead. We have divided four burial models of phosphate ore bodies in this area, which are dominated by two genetic types: Primary paleogeographic sedimentation and late tectonic movement. Furthermore, a unique occurrence law of phosphate-rich ore bodies in this area is discovered: The phosphate-rich ore bodies are mainly hosted in the middle part of the b ore body, and most of them develop in the dark dense massive phosphorite, with the ore grade positively correlated with the color depth of the phosphorite.
The "transition zone blank area" in the southern part of the Yushan-Zhongping area has superior metallogenic geological conditions, and it has great prospecting potential for forming a giant phosphate ore enrichment area. This area can be used as a strategic reserve of scarce high-quality phosphate ore prospecting targets for the future development of Guizhou Province. The research results not only enrich the metallogenic theory of phosphate deposits in the transition zone of Central Guizhou, but also provide important practical guiding value for the implementation of the "intensive development of rich ore" strategy in Guizhou Province and the sustainable development and utilization of regional phosphate ore resources.
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