投稿时间：2025-02-10
修订日期：2025-06-21
网络发布日期：2025-08-26
中文摘要:地形坡度是红土型镍矿成矿的关键控制因素，然而以往多依赖于勘查工作的经验性认识，多认为5°~20°的地形地貌对红土镍矿的形成较为有利，但该认识缺乏系统的统计学数据支持。通过系统总结印尼某红土镍矿项目二十多年来找矿钻探工作成果，将每个见矿钻孔的褐铁矿带（Limonite）、腐泥土带（Saprolite）和组合带（Limonite+Saprolite）的品位、厚度特征与该孔点位的地形坡度和海拔相关联，文章首次通过统计学量化分析对比不同坡度范围之间见矿钻孔品位、厚度高低与占比，研究不同坡度对红土镍矿成矿作用的影响程度。结果显示：坡度对红土镍矿矿体的品位、厚度均有较强的影响，在红土镍矿靶区筛选与评价过程中，应优先考虑5°~25°的坡度区域和260~400 m的见矿海拔高度区间。
Abstract:Slope gradient is a key controlling factor in the formation of lateritic Nickel deposits. However, previous studies have largely relied on empirical observations from exploration activities, often suggesting that terrain slopes of 5°～20° are more favorable for the formation of lateritic Nickel deposits. Yet, this perspective lacks systematic statistical data to substantiate it. This paper systematically summarizes over two decades of exploration drilling results from a lateritic Nickel project in Indonesia. It correlates the grade and thickness characteristics of the limonite zone, saprolite zone, and combined zone (limonite+saprolite) in each mineralized drill hole with the topographic slope and elevation of the hole location. For the first time, a statistical quantitative analysis is conducted to compare the grade, thickness, and proportion of mineralized drill holes across different slope ranges, thereby investigating the influence of varying slopes on the formation of lateritic Nickel deposits. The study concludes that slope gradient significantly impacts both the grade and thickness of lateritic Nickel ore bodies. In the process of target screening and evaluation for lateritic Nickel deposits, priority should be given to slope areas of 5°~25° and the peak elevation range of 260~400 m above sea level for mineralized lateritic bodies.
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基金项目:本文得到地球深部探测与矿产资源勘查国家科技重大专项（编号：2024ZD1002207）和江西省“双千计划”项目（编号：DHSQT42023001）联合资助
引用文本：
程俊,邓居智,陈辉,闫永红.2025.地形坡度对全球红土型镍矿床成矿作用的影响研究——以印尼某红土型镍矿为例[J].矿床地质,44(4):905~917CHENG Jun,DENG JuZhi,CHEN Hui,YAN YongHong.2025.Influence of terrain slope on formation of global lateritic Nickel deposits： A case study of a Lateritic Nickel deposit in Indonesia[J].Mineral Deposits44(4):905~917
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