| 黄厚,钟文丽,宋子行,曹倩,李成祥,欧俊利,胡庆林.四川石棉足富大理岩矿床地质特征、矿床成因及开发利用前景评价[J].矿产勘查,2025,16(12):2575-2584 |
| 四川石棉足富大理岩矿床地质特征、矿床成因及开发利用前景评价 |
| Geological characteristics, origin and evaluation of development and utilization prospects of the Zufu marble deposits in Shimian, Sichuan |
| 投稿时间：2024-05-09 |
| DOI：10.20008/j.kckc.202512004 |
| 中文关键词: 大理岩矿 地质特征 矿床成因 足富 开发利用前景 |
| 英文关键词: marmarble ore geological features origin of deposit Zufu prospect of exploitation and utilization |
| 基金项目:本文受海南省海洋地质资源与环境重点实验室开放基金项目(24-HNHYDZZYHJKF051)和四川省石棉县足富大理岩矿资源储量核实项目联合资助。 |
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| 中文摘要: |
| 四川石棉足富矿区分布有大量具有工业价值的大理岩，但因关注度低，大理岩原岩的沉积环境、成因及开发利用价值尚不明确。本文在野外地质调查的基础上，系统开展了岩相学与地球化学等研究分析。结果表明，矿体受中泥盆统河心组地层控制明显，连续性较好，厚度相对稳定，总体呈东北厚，西南薄的特征，资源储量约 400万 t。大理岩矿石具有较高的 P2O5、SiO2/(Na2O+K2O)比值(平均 8.67)和 Al2O3/(Na2O+K2O)比值(平均 3.42)富集 Nb、Sc、Ba等元素，指示其原岩为沉积成因碳酸盐岩。利克(al-alk)-c图解进一步表明大理岩原岩为石，灰岩。Ga判别图解、镁铝含量比图解等指示大理岩原岩沉积环境为海相环境。Cr、Mo、Ni及 Ni/Co比值暗示大理岩原岩沉积时处于氧化水体中，可能形成于含氧量较高的浅海环境。块状大理岩的白度(平均 88.64%)和 CaO(平均 55.29%)远超工业品级二级品(CaO≥52%、白度≥85%)，可作为重质碳酸 |
| 英文摘要: |
| In the Shimian Zufu mining area of Sichuan Province, substantial marble deposits of industrial sig-nificance are developed. However, due to limited research focus, the sedimentary environment, genesis, and exploi-tation potential of the marble protolith remain poorly constrained. Based on field geological surveys, this study sys-tematically conducted petrographic and geochemical analyses. Results indicate that the ore bodies are distinctlycontrolled by the Middle Devonian Hexin Formation, exhibiting good continuity and relatively stable thickness, gen-erally characterized by thicker strata in the northeast and thinner in the southwest, with total resources estimated atapproximately 4 million tonnes. The marble ore displays high P2O5 content, elevated SiO2/(Na2O+K2O) ratios (averag-ing 8.67), and Al2O3/(Na2O+K2O) ratios (averaging 3.42), along with enrichment in elements such as Nb, Sc, and Ba,collectively indicating a sedimentary carbonate protolith. The Lick (al-alk)-c diagram further confirms that the pro-tolith of the marble is limestone. Ga discrimination diagrams and Mg/Al ratio plots collectively suggest a marinesedimentary environment for the marble protolith. Elements such as Cr, Mo, Ni, and the Ni/Co ratio imply depositionunder oxidizing water conditions, likely in a well-oxygenated shallow marine setting. The massive marble exhibitswhiteness (averaging 88.64%) and CaO content (averaging 55.29%) significantly exceeding the industrial Grade IIstandards (CaO ≥ 52%, whiteness ≥ 85%), rendering it suitable for exploitation as ground calcium carbonate. Giventhe favorable market development trends for ground calcium carbonate, the prospects for exploitation are promising. |
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