| 浅论湘东北地区与燕山期花岗岩有关矿床的成矿系列与找矿方向 |
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| 关键词:polymetal deposit metallogenic series prospecting direction Yanshannian granites northeastern of Hunan province |
| 基金项目:湖南省地质院科研项目(编号: HNGSTP202306; HNGSTP202302; HNGSTP202105);中国地质调查局二级项目(编号: DD20230055; DD20221695-16);湖南省重点领域研发计划资助项目(编号: 2019SK2261);湖南省自然资源厅科技计划项目(编号: 20230102DZ) |
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| A Preliminary Study of Metallogenic Series and Its Prospecting Direction Related to Yanshannian Granites in Northeastern of Hunan Province |
| The northeastern Hunan Province is an important area of polymetallic (Au, Cu, Co, Pb, Zn, W) and rare-metal (Nb, Ta, Li) ore concentration in South China. The spatio-temporal distribution of polymetallic deposits and Yanshannian granites shows that the mineralization in the study area has a genetic relationship with granitoids. Based on previous studies, we hypothesize that these deposits belong to a single metallogenic series: the polymetallic (rare-metal) ore-deposit minerogenetic series related to the Yanshannian intrusion, which can be subdivided into six subseries of ore deposits. The Cu polymetallic deposit subseries (Ⅰ) associated with Early Yanshannian intrusive rocks, which is genetic realted to quzrtz porphyry orgined from Mantal-Crust interaction. The others deposit subseries (Ⅱ–Ⅵ) associated with Late Yanshannian intrusive rocks, are genetic realted to Lianyuanshan and Mufushan granitic batholith, which derived from partial melting of metasedimentary basement in an extensional tectonic setting. The Li-Nb-Ta rare-metal deposit subseries (Ⅱ) is pegmatite-type deposit formed by differentiation of two-mica monzogranite. The ore metals of the W polymetallic deposit subseries (Ⅲ) and Pb-Zn polymetallic deposit subseries (Ⅳ) were directly derived from the Mufushan granites. The ore-frrming material extracted from basement and tectonic reactivated when magma upwilling in the Lianyunshan area, supplied ore metals and migration channels for Co-Cu polymetallic deposit subseries (Ⅴ) and Au polymetallic deposit subseries (Ⅵ). Based on regional metallogenetic and “absence prospecting” theroies, this paper argue that the southern region of Changsha-Pingjiang fault has excellent prospecting for Co-Cu deposits, and the northeastern of Hunan Province showing good Au and rare-metal searchingprospects. |
| CHEN Jian-feng,HUANG Jian-zhong,WEN Chun-hua,ZHANG Jin-xu,PENG Wei,LI Sheng-miao,CAO Chuang-hua,AN Jiang-hua.2023.A Preliminary Study of Metallogenic Series and Its Prospecting Direction Related to Yanshannian Granites in Northeastern of Hunan Province[J].Acta Geoscientica Sinica,44(5):815-833. |
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