--- 格式版本: 2 标题: "Caldeira rare earths project, Brazil – update" 原文链接: "https://www.miningweekly.com/article/caldeira-rare-earths-project-brazil-update-2026-07-17" 发布日期: "2026-07-17" 发布时间校准状态: "found" 发布时间来源: "llm:strict_original_body" 发布时间证据: "div class=d-flex flex-column cm-author-name-by: 17th July 2026 By: Sheila Barradas Creamer Media Research Coordinator & Senior Deputy Editor" 发布时间校准原因: "该日期位于作者/来源区域，且与URL中的日期一致，符合文章发布时间的特征。" 发布时间校准置信度: "100" 发布时间候选数量: 80 发布时间严格候选数量: 15 发布时间原页读取状态: "原页面来自已抓取 HTML" 发布时间未找到原因: "候选日期无效或 LLM 未确认" 发布时间校准时间: "2026-07-17T16:56:47+08:00" 发现时间: "2026-07-17T15:03:55+08:00" 入库时间: "2026-07-17T09:18:06.745Z" 来源平台: "Tavily（AgentKey）" 搜索渠道: "tavily_web" 搜索词: "supernode" 匹配关键词: [] 相关厂家: [] 相关专家: [] 内容类型: "网页" 抓取工具: "AgentKey Scrape" 清洗工具: "AgentKey Markdown + LLM 正文裁剪" 原始附件: [] 图片摘要: - "✓ ./assets/img-7234874f.jpg | photo | 展示Caldeira项目离子吸附型稀土矿石样本，呈黄褐色土状结构，直观反映资源形态。" - "✗ ./assets/img-2afaa7a2.png | ad | 广告：Electra Mining展会及Strata Worldwide产品推广，与正文无关。" - "✗ ./assets/img-aa585412.jpg | ad | 推广：Creamer Media 2026水资源报告封面，与正文无关。" - "✗ ./assets/img-a226463a.jpg | ad | 推广：Creamer Media 2026年6月进行中项目报告封面，与正文无关。" - "✗ ./assets/img-4df9f5b4.jpg | photo | 无关配图：展示的是锰矿石（manganese ore），正文讨论的是稀土（rare earths）。" - "✗ ./assets/img-d84685ca.jpg | ad | 推广：Engineering News & Mining Weekly杂志封面推广，与正文无关。" - "✗ ./assets/img-724ed40f.jpg | photo | 无关配图：展示的是Escondida铜矿（智利），正文讨论的是巴西Caldeira稀土项目。" - "✗ ./assets/img-72bb1387.jpg | photo | 无关配图：ACTOM工厂剪彩仪式，与正文无关。" - "✓ ./assets/img-9935667c.jpg | other | " - "✓ ./assets/img-aca9ba07.jpg | other | " - "✓ ./assets/img-ec043d25.jpg | other | " - "✓ ./assets/img-2007cbfb.jpg | other | " - "✓ ./assets/img-493524d6.jpg | other | " - "✓ ./assets/img-c2a5d7e6.jpg | other | " - "✓ ./assets/img-ecf32e26.jpg | other | " - "✓ ./assets/img-178051f3.jpg | other | " AI优质: "否" AI打分: 5 AI分档: "非优质" AI质检状态: "不通过" AI打分理由: "完全无关AI Rack/超节点，内容为巴西稀土矿项目更新。" AI质检模型: "deepseek-v4-flash" AI质检时间: "2026-07-30T01:00:31+08:00" AI主题相关性: 0 AI来源权威性: 5 AI新颖性: 0 AI技术细节: 0 AI商业部署信号: 0 AI完整性: 0 采集批次: "2026年7月17日15点03分52秒" 采集批次ID: "20260717-150352-345" 去重键: "https://www.miningweekly.com/article/caldeira-rare-earths-project-brazil-update-2026-07-17" --- BNA Mining Solutions|Meteoric Resources|Brazil|Caldeira Project|Critical Minerals|Rare Earths|Minas Gerais Caldeira rare earths project, Brazil – update ![Caldeira rare earths](./assets/img-7234874f.jpg) Photo by Meteoric Resources Photo by Meteoric Resources **Name of the Project** Caldeira [rare earths](https://www.miningweekly.com/topic/rare-earths) project. **Location** [Minas Gerais](https://www.miningweekly.com/topic/minas-gerais), in [Brazil](https://www.miningweekly.com/topic/brazil). **Project Owner/s** Australian exploration company [Meteoric Resources](https://www.miningweekly.com/topic/meteoric-resources). **Project Description** Caldeira has a global mineral resource estimate of 1.63-billion tonnes grading 2 317 parts per million (ppm) total rare-earth oxides (TREO), including 518 ppm magnetic rare-earth oxides (MREO). Measured and indicated resources total 703-million tonnes grading 2 617 ppm TREO, including 584 ppm MREO, which Meteoric has said is the world's largest measured and indicated resource inventory among ionic absorption clay deposits. Measured resources total 128-million tonnes grading 2 815 ppm TREO, including 609 ppm MREO. The project includes a high-grade starter pit of more than 4 000 ppm TREO. The Caldeira processing plant is designed to process six-million tonnes a year of dry feed to produce an estimated 24 000 t/y of dry mixed rare-earth carbonate product. TREO production over the 20-year life-of-mine (LoM) is estimated at 271 687 t. Average TREO production is estimated at 13 584 t/y, neodymium/praseodymium oxide production at 4 228 t/y (84 572 t over the LoM), and dysprosium/terbium oxide production of 130 t/y (2 600 t over the LoM). Further, potential remains to expand the project and move downstream into the production of separated rare-earth element oxides at later dates. **Potential Job Creation** Not stated. **Net Present Value/Internal Rate of Return** The project has a pretax net present value, at an 8% discount rate, of $1.98-billion and an internal rate of return of 31%, with a payback of 2.8 years using forecast pricing. **Capital Expenditure** Development capital is estimated at $443-million. **Planned Start/End Date** The project has received an accelerated path to permitting and production – to deliver first production in 2028 – with the [Minas Gerais](https://www.miningweekly.com/topic/minas-gerais) state government’s awarding priority status. **Latest Developments** Meteoric reported on July 9, 2026, that measured resources across Caldeira had increased by 246% following infill drilling focused on Capão do Mel, Figueira and Soberbo. The programme increased measured resources across these deposits from 11-million tonnes to 102-million tonnes and improved confidence in the upcoming definitive feasibility study. Measured resources are now defined at all three deposits and are included in the study. Infill drilling at Barra do Pacu is continuing and will inform future resource estimates. ![图片](./assets/img-2afaa7a2.png) **Key Contracts, Suppliers and Consultants** [BNA Mining Solutions](https://www.miningweekly.com/topic/bna-mining-solutions) (updated MREs for Capão do Mel, Figueira and Soberbo). **Contact Details for Project Information** Meteoric, tel +61 8 6166 9112. 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