| 李杭,周坤,严城民,顾光明,罗伟,高爱奎,胡凯兵,黄昌键.滇西南大同山稀土矿地貌对矿体的控制作用[J].矿产勘查,2025,16(S1):10-17 |
| 滇西南大同山稀土矿地貌对矿体的控制作用 |
| Controlling effect of geomorphology on ore bodies in Datong Mountain rare earth deposit，Southwest Yunnan Province |
| 投稿时间：2024-09-26 |
| DOI：10.20008/j.kckc.2025S1002 |
| 中文关键词: 大同山稀土矿 地貌 风化壳离子吸附型稀土矿体 控制作用 滇西南 |
| 英文关键词: Datong Mountain rare earth mine geomorphology weathering crust ion adsorption type rare earth ore body controlling effect Southwest Yunnan |
| 基金项目:本文受云南省地质勘查基金项目(K202102)资助。 |
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| 中文摘要: |
| 云南省澜沧县大同山—大黑山风化壳离子吸附型稀土矿的地貌可划分 3个一级单元、 6个二级单元、 21个三级单元。通过对 67个人力冲击取样钻的孔口海拔高程、矿体顶板厚度、矿体厚度、微地貌特征进行统计之后，发现地貌控制稀土矿体的一般规律。具体表现为: ①一级地貌单元对矿体的埋深有明显控制作用， Ⅲ级、 Ⅱ级夷平阶地的矿体埋深较大， Ⅰ级夷平阶地的矿体埋深较小； ②三级地貌单元的矿体厚度在残留山山顶、古夷平面、浅剥蚀山较大，残留山斜坡较小，强烈侧蚀带、深剥蚀山、强烈侵蚀带仅有少数钻孔见矿。通过研究地貌对稀土矿体的控制作用，可以更加合理地布置探矿工程，分析成矿规律、进行资源储量估算。 |
| 英文摘要: |
| The geomorphology of the Datong Mountain -Dahei Mountain weathering crust ion adsorption rare earth deposit in Lancang County，Yunnan Province is divided into 3 first-order units，6 second-order units and 21 third-order units. The general rule of geomorphology controlling rare earth ore body is found after the statistics ofpore elevation，orebody roof thickness，orebody thickness and microgeomorphology of 67 manual impact sampling drills. The results show that:(1)The first grade geomorphic unit has an obvious control effect on the buried depthof orebodies. The buried depth of orebodies in grade Ⅲ and Ⅱ planated terraces is larger than that in grade Ⅰplanated terraces.(2)The orebody thickness of the third grade geomorphic unit is larger at the top of residual mountain，ancient planation surface and shallow denudation mountain，while the slope of residual mountain is smaller. Only a few holes are found in the strong lateral erosion zone，deep denudation mountain and strong erosion zone. The study of geomorphic control of rare earth ore body can be used to arrange prospecting projects morerationally，analyze metallogenic regularity and estimate resources and reserves. |
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