| 李菁,胡伟.豫北黄洞地区冶镁用白云岩矿地质特征与开发利用前景[J].矿产勘查,2025,16(S2):63-69 |
| 豫北黄洞地区冶镁用白云岩矿地质特征与开发利用前景 |
| Geological characteristics and development and utilization prospects of dolomite ore for magnesium smelting in Huangdong northern Henan |
| 投稿时间：2023-11-08 |
| DOI：10.20008/j.kckc.2025s2010 |
| 中文关键词: 白云岩矿 地质特征 矿床成因 河南黄洞 |
| 英文关键词: dolomite deposit geological features deposit genesis Henan Huangdong |
| 基金项目: |
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| 摘要点击次数: 32 |
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| 中文摘要: |
| 黄洞冶镁用白云岩矿位于华北地台山西断隆的太行山拱断束的东部，地层以早古生代海相碳酸盐岩为主，构造比较简单，岩浆岩不发育。研究区内冶镁用白云岩矿体赋存于中寒武统张夏组内，矿体严格受地层层位控制，矿层厚度大且稳定，矿石中有用成分 MgO含量平均值为 20. 52%，有用组分含量较高，成分均匀，有害成分 SiO2、K2O、Na2O等，均低于一般工业指标有害成分要求，矿石品级均为 Ⅰ级品。该区域白云岩主要发育潮坪和滩环境，由于局部水体受限使得海水盐度和密度变大，向下伏地层回流，使原先沉积的石灰岩被交代成白云岩，经分析认为矿床属浅海相沉积白云岩矿床。研究区采用了热法还原法进行了矿石加工技术性能生产性试验，按照其工艺流程进行高温热还原，得到结晶镁；结晶镁经过重熔、精炼即可得到高纯镁。本区白云岩除可以用来提炼金属镁外，还可以广泛应用于冶金溶剂及耐火材料，具有广泛的用途和开发利用前景，适宜筹建特大型金属镁矿山基地。 |
| 英文摘要: |
| Huangdong dolomite deposit for magnesium smelting is located in the east of Taihang Mountainarch fault bundle in Shanxi fault uplift of North China platform. In the mining area，the strata are mainly of Early Paleozoic marine carbonate，the geological structure is relatively simple，and the magmatic rocks are notdeveloped. The dolomite orebodies hosted in Middle Cambrian Zhangxia Formation in the mining area are strictly controlled by strata and characterized by large thickness，stable and high grade. The dolomite in this area wasmainly formed in the tidal flat and beach environment. In this environment，local water bodies were confined and the seawater became saltier and denser，flowing back down into the lower strata，so that the original sedimentary limestone was replacement as dolomite. Comprehensive study suggest that the deposit belongs to the neriticsedimentary dolomite deposit and has a good prospect for development and utilization. Based on the study of thegeological characteristics of the dolomitedeposit in the area，this paper analyzes the genetic type of mineral deposits，summarizes the two prospecting sign of stratum+lithology and landform，and discusses the exploitation direction，aiming at providing reference for the exploration of the similar deposit. |
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