| 杨荣芳,张凯涛,刘纪峰,张志爽,苏阳艳,张恒.河南方城独树地区萤石矿地球化学特征及成因探讨[J].矿产勘查,2025,16(12):2585-2594 |
| 河南方城独树地区萤石矿地球化学特征及成因探讨 |
| Geochemical characteristics and genesis of fluorite deposits in the Dushu area of Fangcheng, Henan Province |
| 投稿时间：2024-05-20 |
| DOI：10.20008/j.kckc.202512005 |
| 中文关键词: 萤石矿床 地球化学 流体包裹体 矿床成因 方城独树 |
| 英文关键词: fluorite deposit geochemistry fluid inclusions genesis of deposit Dushu area of Fangcheng county |
| 基金项目:本文受河南省豫地科技集团2024年度自筹资金科研项目(JTZCKY2024025)资助。 |
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| 中文摘要: |
| 为了探讨方城独树地区萤石矿地球化学特征及矿床成因，本文对区内萤石矿的微量元素、稀土元素、流体包裹体等进行了研究。微量和稀土元素特征显示，紫色萤石相对浅绿色萤石 Cr、Ni、U、Be元素含量较高，紫色萤石与围岩稀土元素配分曲线均主要表现为右倾型，紫色萤石与浅绿色萤石的稀土元素配分曲线特征有显著差异性，说明紫色萤石与浅绿色萤石为不同成矿期次的产物。(La/Yb)比值、(Y/Ho)-(La/Ho)及N(Tb/La)-(Sm/Nd)关系图也表明研究区萤石矿经历了多期次的成矿作用，紫色萤石较浅绿色萤石形成时间较早。萤石中包裹体以气液两相包裹体为主，气相和液相成分主要为 H2O，成矿流体是一种较均一的中低温、低盐度、低密度流体。综合分析认为，方城独树地区萤石矿成矿机制主要为水-岩反应，成因类型为浅成中低温岩浆热液裂隙充填型矿床。 |
| 英文摘要: |
| To investigate the geochemical characteristics and the genesis of the fluorite mine in the Dushu areaof Fangcheng County, this study conducted research on trace elements, rare earth elements, and fluid inclusions inthe fluorite mine within the region. The characteristics of trace and rare earth elements show that purple fluorite hasrelatively high content of Cr, Ni, U, and Be elements compared to light green fluorite. The rare earth element parti-tion curves of purple fluorite and the surrounding rock mainly show a right-leaning type. There are significant differ-ences in the rare earth element partition curve characteristics between purple fluorite and light green fluorite, indi-cating that purple fluorite and light green fluorite are products of different mineralization periods. The (La/Yb)N ra-tio, (Y/Ho)-(La/Ho), and (Tb/La)-(Sm/Nd) relationship diagrams also indicate that the fluorite mine in the studyarea has undergone multiple stages of mineralization, with purple fluorite forming earlier than light green fluorite.The inclusions in fluorite are mainly gas-liquid two-phase inclusions, with H2O as the main component of the gasand liquid phases. The ore-forming fluid is a relatively homogeneous, medium to low temperature, low salinity, andlow density fluid. Comprehensive analysis suggests that the ore-forming mechanism of the fluorite mine in the Du-shu area of Fangcheng County is mainly water-rock reaction, and the genesis type is hypabyssal, medium to lowtemperature magmatic hydrothermal fluids fissure filling type deposit. |
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