| 西藏谢通门县邦弄含铁电英岩脉的地质特征及成因分析 |
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| 引用本文：夏祥标,郑来林,李军敏,李再会.2011.Geological characteristics and genetic analysis of the iron-bearing tourmalite dikes in Bangnong area, Xaitongmoin County, Tibet[J].Mineral Deposits,30(4):742~748 |
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| 基金项目:本文得到“西藏普迟亚地区矿产远景调查（任务书编号：矿调[2004］1-3）”项目资助 |
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| 中文摘要:文章介绍了西藏谢通门县邦弄地区含铁电英岩脉的地质特征。电英岩脉的延伸方向大致与区内的断层平行, 围岩为中粒斑状角闪黑云二长花岗岩。电英岩脉中见有不同程度的铁矿化，共有23条矿化较好的含铁电英岩脉。含铁电英岩脉中矿石矿物为赤铁矿（镜铁矿），脉石矿物为石英、电气石及少量的白云母和长石。矿石具叶片状、鳞片状结构，块状构造，矿石类型为致密块状、浸染状、细脉状。氧同位素测试表明，5件样品的δ18Ov-smow平均值为6.8‰，氢-氧同位素组成图显示，成矿流体以大气水为主，但岩浆流体可能也对矿床的形成起了重要作用。 |
| 中文关键词:地质学 含铁电英岩脉 地质特征 氢、氧同位素 成矿流体 谢通门 |
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| Geological characteristics and genetic analysis of the iron-bearing tourmalite dikes in Bangnong area, Xaitongmoin County, Tibet |
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| Abstract:This paper describes geological characteristics of the iron-bearing tourmalite dikes in Bangnong area, Xaitongmoin County, Tibet. The iron-bearing tourmalite dikes extend roughly parallel to the fault. The wall rock is medium-grained porphyritic hornblende biotite monzogranite. The tourmalite dikes have experienced different degrees of iron mineralization. Statistics reveal 23 promising mineralized veins. Ore minerals include hematite（specularite）, whereas gangue minerals are quartz, tourmaline, and a small amount of muscovite and feldspar. Ores are of scaly and flaky textures and massive structure. Ore types include massive form, dissemination and veinlets. Oxygen isotope analysis shows that the average of δ18Ov-smow from 5 samples is 6.8‰. Oxygen and hydrogen isotopic analysis of the fluid indicates that the ore-forming fluids were dominated by meteoric water, with the probable participation of magmatic water. |
| keywords:geology, iron-bearing tourmalite dike, geological characteristics, oxygen and hydrogen isotopes, ore-forming fluid, Xaitongmoin |
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