| 杨文静,程天赦,张学斌,朵兴芳,高洪生,张永义,沈玉娜,董路阳,赵萌,刘欢.天津蓟州沿河钨矿成矿时代及流体包裹体特征[J].矿产勘查,2025,16(8):1963-1973 |
| 天津蓟州沿河钨矿成矿时代及流体包裹体特征 |
| Metallogenic age and fluid -inclusion characteristics of the Yanhe tungsten deposit in Jizhou, Tianjin |
| 投稿时间：2023-12-19 |
| DOI：10.20008/j.kckc.202508012 |
| 中文关键词: 沿河钨矿床 石英 Rb-Sr等时线年龄 氢-氧同位素 流体包裹体 天津蓟州 |
| 英文关键词: Yanhe tungsten deposit quartz Rb-Sr isochronous age hydrogen oxygen isotopes fluid-inclusion Jizhou, Tianjin |
| 基金项目:本文受中国地质调查局项目(DD20230203414)资助。 |
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| 中文摘要: |
| 沿河钨矿床是华北北缘天津蓟州地区典型的石英脉型黑钨矿矿床，赋存于盘山岩体内接触带中，其成矿时代和成矿流体来源不明。本文对沿河钨矿床含钨石英脉中流体包裹体开展了年代学、岩相学、显微温度、氢-氧同位素等研究。结果显示，沿河钨矿含钨石英脉石英流体包裹体 Rb-Sr等时线年龄为(200±6.6) Ma，与盘山岩体细粒二长花岗岩成岩年龄(203 Ma)较为相近。流体包裹体以气-液两相包裹体为主，包裹体均一温度为 289~394 ℃(平均值为 363 ℃)，属中高温流体；δD和 δ18O值分别为-74.365‰~-81.361‰、 |
| 英文摘要: |
| The Yanhe tungsten deposit is a small-size quartz-vein type tungsten deposit in Jizhou, Tianjin. Allore veins are found in the contact zone within the Panshan rock mass. The metallogenic age and fluid have not beenstudied yet. This article presents a study on fluid-inclusions in chronology, petrology, microtherm, and hydrogeNOxygen isotopes. Fluid-inclusions Rb-Sr dating obtained a isochronal age of (200±6.6) Ma, which is similar to theage of the Panshan fine-grained monzogranit (203 Ma). The fluid inclusions are mainly composed of gas-liquid in-clusions, with a uniform temperature ranging from 289 ℃ to 394 ℃ (the average temperature is 363 ℃). The value ofδD and δ18O is -74.365‰--81.361‰, 9.41‰-10.71‰ respectively, indicating that the metallogenic fluids ofYanhe tungsten deposit mainly come from magmatic water, with the participation of atmospheric precipitation. Insummary, it is preliminarily believed that the Yanhe tungsten deposit is closely related to the magmatic evolution ofthe Panshan rock mass. Its mineralization characteristics and geological background are similar to tungsten depositssuch as Xihuashan and Shimenshi in South China, and it has good prospecting potential. The research results mightprovide a certain geological basis for further study of the ore-forming laws and exploration of the deposit on thenorthern edge of the North China block. |
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