| 周念峰,张遵遵,卢友月,夏杰,杨奇荻,付建明.湘南黄沙寺铷多金属矿区花岗斑岩锆石 U-Pb定年、Hf同位素组成及其找矿指示意义[J].矿产勘查,2025,(1):82-91 |
| 湘南黄沙寺铷多金属矿区花岗斑岩锆石 U-Pb定年、Hf同位素组成及其找矿指示意义 |
| Zircon LA-ICP-MS U-Pb dating, Lu-Hf isotopes composition and its prospecting significance of the granite porphyry from the Huangshasi rubidium deposit, southern Hunan Province |
| 投稿时间：2024-05-05 |
| DOI：10.20008/j.kckc.202501008 |
| 中文关键词: 锆石 LA-ICP-MS U-Pb年龄 Lu-Hf同位素 花岗斑岩 铷矿 黄沙寺 湘南 |
| 英文关键词: zircon LA-ICP-MS U-Pb dating Lu-Hf isotope granite porphyry rubidium deposit Huangshasi southern Hunan Province |
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| 中文摘要: |
| 湘南黄沙寺铷矿床位于南岭成矿带中段北缘，铷矿体主要赋存于花岗斑岩中。花岗斑岩锆石 LA-ICP-MS U-Pb测年结果为(87.7±0.7)Ma(95%置信度，MSWD=4.6)显示其为华南燕山晚期构造-岩浆活动产物；锆石 Hf同位素分析显示:εHf(t)值为-3.7~-7.0，两阶段模式年，龄为 1408~1223 Ma，暗示花岗斑岩岩浆可能主要来源于中元古界下地壳物质重熔。近年来研究表明，湘南地区上堡、拖碧塘、界牌岭等燕山晚期小岩体均与锂铷多金属成矿密切相关，加强它们之间成岩成矿作用关系研究，对进一步认识区域燕山晚期成岩成矿地质背景，开展区域锂铷等战略性矿产勘查具有指导意义。 |
| 英文摘要: |
| The Huangshasi rubidium deposit is located in the north margin of Nanling metallogenic belt, south.ern Hunan Province. The rubidium ore bodies mainly occur in the granite porphyry. The results show that the age ofgranite porphyry is (87.7±0.7) Ma (95% confidence, MSWD=4.6), which was the product of the Late Yanshanian tec.tonic magmatic activity in South China; TheεHf(t) values and two stage Hf model ages of the Huangshasi mineralizedgranite porphyry are -3.7~-7.0 and 1408-1223 Ma, respectively. Suggesting that granite porphyry magma derivedmainly from the remelting of Proterozoic crust. In recent years, research has shown that small rock bodies in theLate Yanshan period, such as Shangbao, Tuobitang, and Jiepailing in southern Hunan, are closely related to lithiumrubidium polymetallic mineralization. Strengthening the study of their diagenetic and ore-forming relationships hasguiding significance for further understanding the geological background of the late Yanshan diagenesis and miner.alization in the region and conducting strategic mineral exploration of lithium rubidium and other minerals in the re.gion. |
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