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| 基金项目：江西有色地质矿产勘查开发项目“津巴布韦、莫桑比克地质矿产勘查”（j1-jd-zm001） |
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| 摘要： |
| 通过对莫桑比克Morrua矿床及成矿带部分典型矿床的实地调查，归纳总结Morrua式伟晶岩型稀有金属矿床的地质特征，建立找矿标志，初步探讨矿床成因，构建成矿模式。结果表明：该矿床形成于泛非造山运动，受岩浆岩、构造及地层控制，矿体赋存于LCT（锂-铯-钽）族花岗伟晶岩中，围岩为角闪片岩，属于高温热液花岗伟晶岩型钽、锂、铯等稀有金属矿床；系统总结出Morrua矿床九大找矿标志，区域上利戈尼亚钽铌稀有金属成矿带泛非期花岗侵入体外接触带沿断裂分布的含锂辉石、锂云母、铌钽铁矿、铯沸石及绿柱石等花岗伟晶岩脉为Morrua式伟晶岩型稀有金属矿的直接找矿标志。研究成果可为该矿区及其外围的进一步勘查工作提供参考 |
| 关键词：伟晶岩型 稀有金属矿 地质特征 找矿标志 Morrua矿床 莫桑比克 |
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| Abstract: |
| Based on field investigation of the Morrua deposit and several typical deposits in the metallogenic belt of Mozambique, combined with existing geological data, the geological characteristics of the Morrua pegmatite-type rare metal deposit are summarized. The deposit is considered to have formed during the Pan-African orogeny and is controlled by magmatic rocks, structures, and strata. The ore bodies occur in LCT family (lithium-cesium-tantalum) granitic pegmatite, with amphibole schist as the surrounding rock. It is a high temperature hydrothermal granitic pegmatite-type rare metal deposit, hosting tantalum, lithium, cesium, and other rare metals. Nine major prospecting indicators of the Morrua deposit are systematically summarized. The granitic pegmatite veins containing spodumene, lepidolite, columbitetantalite, pollucite, and beryl, which are distributed along faults within the contact zone of the Pan-African granitic intrusion in the regional Ligonha tantalum-niobium rare metal metallogenic belt, serve as the direct prospecting indicators for ″Morrua style″ pegmatite-type rare metal deposits. Through comprehensive analysis of the geological characteristics and prospecting indicators, the genesis of the deposit is preliminarily discussed and a metallogenic model is constructed, providing a reference for further exploration in the mining area and its surroundings. |
| Keywords:pegmatite-type rare metal deposit geological characteristic prospecting indicator Morrua deposit Mozambique |
| 张连湘,丁 亮,潘世语,等.莫桑比克Morrua伟晶岩型稀有金属矿床地质特征、找矿标志及成因[J].地质学刊,2026,50(2):127-137 |
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