| 湖南宜章瑶岗仙黑钨矿石英脉成矿流体性质的探讨 |
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| 作者单位： | Wuhan College of Geology，Wuhan 430074 |
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| 摘 要： | 对于黑钨矿石英脉的成因,历来都认为是高中温热液充填而成。本文根据石英脉与细晶岩、伟晶岩过渡;围岩蚀变种类及强度的变化;石英脉中晶洞特征的研究;矿物包裹体研究及测温资料;金属矿物局部大量集中的不规律性;石英脉中黑钨矿的产出特点;产在角岩中的石英脉内出现花岗岩角砾;黑钨矿中MnO/FeO比值变化特征:含钨石英脉中矿物组合和化学成分变化特征,认为形成黑钨矿石英脉的成矿流体是一种粘稠的、密度较大、成分以SiO_2为主的熔浆—热液过渡性流体,它具有上部偏液、下部偏浆的特点。
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| 关 键 词： | 黑钨矿石英脉 成矿流体 湖南省 熔浆 热液 岩浆-热液过渡性流体 |
A DISCUSSION ON THE PROPERTY OF ORE-FORMING FLUID OF THE WOLFRAMITE QUARTZ-VEIN IN THE YAOGANGXIAN TUNGSTEN DEPOSIT, YIZHANG COUNTY, HUNAN PROVINCE |
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| Authors: | Lin Xinduo Zhang Dehui Zhang Chuanling |
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| Abstract: | It has been consistently held that the mineralization fluid forming wolframite quartz-vein is high-middle hydrothermal solution. In this paper, according to a large number of geological facts, it is believed that ore-forming fluid forming wolframite quartz-vein is likely a fluid which has transitional property between hydrothermal solution and magma. It has great viscosity and density. It contains a great quantity of SiO2. The facts are as follows., the transition from quartz-vein to aplite and to pegmatite, the changes of varieties and intensity of country rock alteration, vug characteristics in wolframite quartz-vein, the results of the study of mineral inclusions,the irregularity of local concentration of a large quantity of metal minerals, the emerged features of wolframite in quartz-vein, the granite breccia in quartz vein filling in hornfels, the variation of MnO/FeO ratio in wolframites and of mineral assemblage and chemical composition in the ore-vein etc. The transitional fluid is c
aracterized by that its upper part is akin to hydrothermal solution and lower part is akin to magma after filling into the fissure which is almost vertical. |
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| Keywords: | wolframite quartz-vein ore-forming fluid Hunan province magma hydrothermal solution magma-hydrothermal solution intermediate type fluid |
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