| 王涌泉,汪礼明,刘东宏,汪汝澎,欧阳志侠.广东离子吸附型稀土矿床约束机制及找矿预测[J].矿产勘查,2024,15(5):724-732 |
| 广东离子吸附型稀土矿床约束机制及找矿预测 |
| Constraint mechanism and prospecting prediction of ion-adsorption type rare earth deposits in Guangdong |
| 投稿时间：2023-10-11 修订日期：2023-11-20 |
| DOI：10.20008/j.kckc.202405003 |
| 中文关键词: 离子吸附型 稀土矿床 约束机制 找矿预测 广东省 |
| 英文关键词: ion-adsorption type rare earth deposits constraint mechanism prospecting prediction Guangdong Province |
| 基金项目:本文受广东省稀土资源与环境风险项目（2019B030302013）资助。 |
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| 中文摘要: |
| 构造活动和岩浆活动对广东省离子吸附型稀土矿床的形成具有显著的制约作用。广东省境内离子吸附型稀土矿床主要产于近东西向或北东向深大断裂带中，这些断裂都有切割深度大、活动期次多，并伴有多期次岩浆活动的特点。成矿母岩形成时代以晚侏罗世侵入岩为主，岩体成因以重熔型花岗岩为主，同熔型花岗岩次之。与稀土富集有关的热液蚀变是稀土矿床物质迁移和富集的重要阶段。研究区水系沉积物的镧和钇异常富集，通过对重点异常查证，新发现多处极具找矿前景的稀土找矿靶区。通过分析稀土矿床成矿母岩的地球化学特征，提出了水系沉积物异常找矿预测方向，为广东省及邻区离子吸附型稀土的进一步找矿增储提供重要参考。 |
| 英文摘要: |
| The tectonic and magmatic activities have a significant constraining effect on the formation of ion-adsorption type rare earth deposits in Guangdong Province. The ion-adsorption type rare earth deposits are primarily found in nearly east-west trending fault zones or north-east trending deep fault zones. These faults is deep cutting， multiple activity periods， and multiple magmatic activities. The ore-forming parent rock is mainly Late Jurassic intrusive rocks. The genesis of rock mass is primarily dominated by re-melted granite， followed by co-magmatic granite. The hydrothermal alteration associated with rare earth enrichment is an important stage for the migration and enrichment of rare earth deposits. The abnormal enrichment of lanthanum and yttrium in stream sediments in the survey area. A number of rare earth prospecting target areas with great prospecting potential have been discovered. By analyzing the geochemical characteristics of the parent rock of the rare earth deposit， the prospecting prediction direction of the stream sediment anomaly is proposed. It provides an important reference for further prospecting and increasing reserves of ion-adsorption rare earth in Guangdong Province and its adjacent areas. |
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