| 王日光,支立佳,高俊飞,刘俊华,霍继霞,徐文淼.内蒙古额济纳旗清河口一带铁矿矿床地质特征及找矿潜力评价[J].矿产勘查,2026,17(S1):137-144 |
| 内蒙古额济纳旗清河口一带铁矿矿床地质特征及找矿潜力评价 |
| Geological characteristics and prospecting potential evaluation of iron deposits in Qinghekou Area， Ejina Banner， Inner Mongolia |
| 投稿时间：2026-05-09 修订日期：2026-05-21 |
| DOI：10.20008/j.kckc.2026S1016 |
| 中文关键词: 清河口铁矿 火山沉积型 地质特征 成矿规律 |
| 英文关键词: Qinghekou iron deposit volcanic sedimentary type geological characteristics metallogenic |
| 基金项目:本文受中冶金地质总局内蒙古地质勘查院项目（2024-KC001）资助。 |
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| 中文摘要: |
| 为破解内蒙古额济纳旗清河口一带铁矿勘查程度不足、成矿规律不明、找矿方向不清的问题，科学指导矿区深部及外围铁矿勘查工作。本研究以1∶2000地质测量、钻探、高精度磁测、井中磁测及样品测试分析为核心手段，结合区域地质资料与邻区矿床对比，系统剖析矿床地质、矿体、矿石特征，厘定控矿因素与成矿规律。基本查清了该矿床位于天山—准噶尔—北山造山系北山弧盆系，红石山—清河口蛇绿构造混杂岩带南侧晚古生代弧盆内，赋矿地层为石炭系白山组二段英安质凝灰岩；共圈定铁矿体33条，主矿体呈似层状，控制走向长580 m、延深203 m，TFe平均品位43.40%、mFe平均品位37.65%，矿床为火山沉积-岩浆热液改造型；明确了地层、岩性、磁异常、蚀变组合为核心找矿标志，圈定深部与外围2处找矿靶区。研究成果表明：矿区成矿条件优越，深部与外围仍具有较大找矿潜力，“物探先行、钻探验证、综合评价”的勘查方法可有效指导同类型矿床勘查。 |
| 英文摘要: |
| To tackle the problems of insufficient exploration extent， ambiguous metallogenic regularity and unclear prospecting orientation for iron deposits in the Qinghekou area of Ejina Banner， Inner Mongolia， and to provide scientific guidance for iron ore exploration in the deep and peripheral parts of the mining area， this study takes 1∶2000 geological survey， drilling， high-precision magnetic survey， borehole magnetic measurement， and sample testing and analysis as the core technical means. Combined with regional geological data and a comparative study of deposits in adjacent areas， it systematically analyzes the geological setting， ore body， and ore characteristics of the deposit， and clarifies the ore-controlling factors and metallogenic regularities. It has been basically ascertained that the deposit is tectonically situated within the Late Paleozoic arc-basin on the southern side of the Hongshishan-Qinghekou ophiolitic tectonic mélange belt， Beishan Arc-Basin System of the Tianshan-Junggar-Beishan Orogenic System. The ore-bearing stratum is the dacitic tuff of the Second Member of the Carboniferous Baishan Formation. A total of 33 iron ore bodies have been delineated. The main ore body is stratoid in shape， with a controlled strike length of 580 meters and a downward extension of 203 meters. Its average TFe grade is 43.40%， and the average mFe grade is 37.65%. The deposit is classified as a volcanic sedimentary-magmatic hydrothermal reworked type. Strata， lithology， magnetic anomalies， and alteration assemblages are defined as the core prospecting indicators， and two prospecting target areas are delineated in the deep and peripheral zones of the mining area. The research results indicate that the mining area has superior metallogenic conditions and retains great iron ore prospecting potential at depth and in peripheral areas. The exploration methodology of "geophysical prospecting first， drilling verification second， comprehensive evaluation overall" can effectively guide the exploration of similar deposits. |
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