| 丁卫平,吉效晋,胡中国,朱志华,孙小童,何汉江.西南地区磷块岩型稀土矿成因探讨——以贵州织金矿为例[J].地质找矿论丛,2024,39(3):360-369 |
| 西南地区磷块岩型稀土矿成因探讨——以贵州织金矿为例 |
| Discussion on the genesis of phosphorite type REE deposit in Southwest China: A case study of Zhijin phosphorite type REE deposit in Guizhou Province |
| 投稿时间：2024-03-28 修订日期：2024-08-04 |
| DOI：10.6053/j.issn.1001-1412.2024.03.008 |
| 中文关键词: 织金磷块岩型稀土矿 玄武岩风化 熔岩流底端 断层 成矿模式 西南地区 |
| 英文关键词:Zhijin phosphorite-type REE deposit weathering of basalt bottom of lava flow fault prospecting and metallogenic model Southwest China |
| 基金项目:中化地质矿山总局地质研究院2021年研究项目(编号:DYKJ202101)资助。 |
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| 中文摘要: |
| 为了探讨贵州织金磷块岩型稀土矿稀土来源,发现晚二叠世玄武岩富稀土,而玄武岩风化到一定程度后,稀土容易在风化形成的黏土中富集;通过因子分析发现,织金磷块岩中稀土元素与黏土矿物显著正相关,但磷块岩中的稀土主要分布于磷灰石中,而不是黏土中;通过织金稀土伴生磷块岩分布位置研究发现,它们分布在熔岩流底端边缘且有深大断层,滇东部磷块岩型稀土矿也有类似情况,这些特点有利于最大面积收集上游来的由水带来的黏土,黏土又随水通过断层进入下部的磷块岩附近,稀土会从黏土进入到磷灰石中。矿区上游富稀土的玄武岩风化,所在位置断层发育,又在熔岩流底端边缘带,这三位一体是在扬子地台西部寻找磷块岩型稀土矿的重要成矿模式。 |
| 英文摘要: |
| This paper deals with REE source of phosphorite type REE deposit. It is known that Permian basalt is rich in REE and after certain degree weathering of the basalt REE tend to concentrate in clay minerals resulted from the basalt weathering. Factor analysis shows that REE in phosphorite are closely related to clay minerals. However REE of the phopsporite occur in apatite. The author of the paper studied the location of Zhijin REE mine. Phosporite associated with REE in Zhijin mine occurs at margin of bottom of lava flow and at the margin deep faults developed. Such phenomenon also exists in phosphorite type REE deposits in east Yunnan province. Such location is favorable to collect maximum clay minerals in mater from upstream area. The water carries clay along fault to vicinity of the phosporite. The trinity of weathering of upstream basalt rich in REE, occurrence of the phosporite at bottom margin of lava flow and development of deep faults at the margin will be the prospecting metallogenic model of phosphorite type REE deposit in the west Yangtze platform. |
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