| 张西文,潘金权,曾豪,陈礼伟,杨震,何雁飞.黔中地区沙井铝土矿床地质特征及成因分析[J].矿产勘查,2025,16(7):1634-1648 |
| 黔中地区沙井铝土矿床地质特征及成因分析 |
| Geological characteristics and genetic analysis of Shajing bauxite in Central Guizhou |
| 投稿时间：2024-03-27 |
| DOI：10.20008/j.kckc.202507007 |
| 中文关键词: 寒武系娄山关组 白云岩 岩相古地理 沙井铝土矿 黔中地区 |
| 英文关键词: Cambrian Loushanguan Formation dolomite lithofacies paleogeography Shajing bauxite deposit Central Guizhou region |
| 基金项目:本文受贵州省清镇市沙井铝土矿勘探项目(GAL-KSQZKT-20220625)资助。 |
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| 中文摘要: |
| 黔中地区作为贵州省内两大铝土矿富集区之一，是中国重要的铝工业生产基地。沙井铝土矿床隶属于黔中地区，且邻近猫场铝土矿床，两者无论在矿体地质特征还是在矿床成因上都有相似之处，同时也自成体系。区内沙井铝土矿体中伴生 Li元素的富集系数可达 95.17%，且 Ga可达 57.72×10-6资源潜力巨大。本文主要根据区内实际地质找矿工作、钻孔样品基本分析及部分稀有元素(Li、Ga)分析、，古岩相环境及古岩溶条件分析，结合区内铝土矿体地质特征及矿石质量特征，对沙井铝土矿的成矿物质来源、矿床成因及成矿模式作浅薄总结:早石炭世大塘期，基底白云岩钙红土化产物，就近堆积到滨湖相的猫场洼地内，脱硅富铝的同时遭受成岩后期水体淋滤作用而形成沙井铝土矿。本研究对今后的地质找矿工作、伴生 Li、Ga资源的综合利用及矿石的采、选、冶工艺起到一定的指示意义。 |
| 英文摘要: |
| As one of the two major bauxite enrichment areas in Guizhou Province, the Central Guizhou regionserves as an important production base for China's aluminum industry. The Shajing bauxite deposit, located in thisregion and adjacent to the Maochang bauxite deposit, shares similarities in both orebody geological characteristicsand genesis, while also maintaining its own distinct features. In the Shajing bauxite orebody, the enrichment coeffi-cient of associated lithium (Li) reaches up to 95.17%, and gallium (Ga) content can attain 57.72×10-6, indicatingsubstantial resource potential. Based on practical geological prospecting, basic analysis of drill core samples, analy-sis of certain rare elements (Li, Ga), as well as paleoenvironmental and paleokarst condition studies, combined withthe geological characteristics of the bauxite orebody and ore quality attributes, this paper provides a preliminarysummary of the metallogenic material sources, genesis, and mineralization model of the Shajing bauxite deposit:During the Early Carboniferous Datang Age, products derived from the calcium lateritization of basement dolomitewere locally deposited in the lakeshore facies of the Maochang depression. Through desiliconization and aluminumenrichment, coupled with leaching by water during the late diagenetic stage, the Shajing bauxite deposit was formed.This study offers certain guidance for future geological prospecting, comprehensive utilization of associated Li andGa resources, as well as mining, beneficiation, and metallurgical processes of the ores. |
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