greisen

Alteration Types , Sequences of Alteration Zone and Petrogenetic Grid of Greisen

云英岩的蚀变类型、蚀变带序和成岩格子

On the Ore-control Mechanism and Mineralization Structure of Greisen Tungsten Deposit in a Tungsten Mine

荡坪钨矿九西矿区云英岩型钨矿床构造控矿机制探讨

Characteristics of ore controlling structure in Da'ao mine , Hunan and its controlling function to greisen type tungsten and tin deposit

湖南大坳矿区控矿构造特征及其对云英岩体型钨-锡矿的控制作用

Malipo emerald deposit in Yunnan Province has two types of pegmatite vein and greisen vein .

云南麻栗坡祖母绿主要有伟晶岩脉型和云英岩脉型两种矿化类型。

Structural ore-controlling characteristics of the greisen body-type tungsten-tin mineralization in Da'ao area , Hunan province

湖南大坳矿区云英岩体型钨锡矿化构造控矿特征

Although there are60 tin-bearing greisen veins , only a few of them form the main ore bodies .

共圈出含锡云英岩脉60余条，但主矿体却只有少数几条。

Tin deposits mainly include greisen type , skarn type , altered granite type , tectonoalternation type and tectonoalternation-skarn type .

锡矿类型主要有云英岩型、矽卡岩型、蚀变岩体型、构造蚀变带型及构造蚀变带-矽卡岩复合型等。

Tungsten mineralization types in Yaoling zone are divided into quartz vein , greisen , altered granite and placer .

瑶岭钨矿带钨矿成因类型有石英脉（带）型、云英岩型、蚀变花岗岩型和砂矿床。

Classification of magmatic monomineralic topaz rock shows that it is advisable to classify it as the category of magmatic greisen .

这类岩石的分类实践表明，它们宜归入岩浆成因的云英岩类范畴。

The tin orebodies dominated by greisen type and altered granite type are characterized by big thickness , strong alteration , medium tin grade and excellent metallurgical specialities .

锡矿以云英岩体型、蚀变花岗岩型为主，具有矿体厚度大、蚀变强、品位中等、矿石利用性能好等特点。

Preliminary study suggests that the greisen magma was formed by evolution of quasi-greisenic magmas resulting from liquid immiscibility of fluorine-and lithium-rich granitic magmas .

这种云英质岩浆是在富氟、锂花岗质岩浆液态分异作用的基础上进一步演化形成的。

The K-Ar age for mica from greisen is 177.9 Ma ± 2.6 Ma , obviously late than the metallogenic time , reflecting a post-ore tectono-thermal disturbance event .

云英岩中的白云母钾氩年龄只有177.9Ma±2.6Ma，低于实际形成时间的年龄值，反映了成矿后研究区构造热事件的干扰。

The segment at SW trend is 400m long , 240m wide and 4-25m thick with average content Sn 0.7 % . There are two types of Sn ores ( including alteration granite and Greisen types ) .

南西段长，宽，厚～，平均品位。矿区有蚀变细粒花岗岩型和云0.5%400m240m425mSn0.7%英岩型两类锡矿。

This type of deposit consists of many mineralized veins of tin and tungstun which include quartz-greisen , greisen , sulfide-quartz , greisenization feldspar erc and mineralized granite of quartz-muscovite greisenization .

这种类型的矿床由许多的锡、钨矿化脉（包括石英一云英岩脉，云英岩脉、硫化物石英脉、云英岩化长石脉等）和石英&白云母云英岩化的矿化花岗岩所组成。