地质与勘探2011，Vol.47Issue(5)：837-845,9.
甘肃天水李子金矿床物质组分及金银赋存状态研究
Material Components and Occurrence States of Gold and Silver in the Lizi Gold Deposit,Tianshui,Gansu Province
摘要
Abstract
The Lizi gold deposit in the Tianshui area of Gansu Province can be categorized into two types,i.e.,porphyry and ductile shear zone types.On the basis of detailed field work,we employ analytical techniques of thin sections,artificial heavy sand analysis,chemical phase analysis and electronic probe spectrum analysis to determine that there are two principal types of gold ores,namely altered rock and quartz vein types.Ores from the ductile shear zone type gold deposit are mainly quartz vein type,while ores from porphyry type gold deposit are of the porphyry-altered type.Ores from ductile shear zone have banded,veinlet-stockwork structures,and porphyry ores have disseminated spotted and massive structures.The gold-bearing minerals of these two types are dominated by pyrite with chalcopyrite and galena.Gangue minerals are mainly quartz,next sericite and chlorite.Gold ore is present in an independent mineral form as fissure gold and intergranulaar gold with sizes ranging generally from 0.074 mm to 0.010 mm.Silver exists in the minerals of the porphyry-altered rock type.Ore textures and structures facilitate the individual mineral separation,and most of the gold minerals are likely disintegrated to native gold after finely grinding.The overall recovery is more than 93.5% in this deposit.This research result provides reliable data for further understanding of regional mineralization and design of ore dressing.关键词
金矿床/物质组分/赋存状态/李子金矿/甘肃Key words
gold deposit/material component/occurrence state/Lizi gold deposit/Gansu分类
天文与地球科学引用本文复制引用
刘云华,刘怀礼,高洪兴,李志国,庄晓,张永强,郑绪忠,魏均启..甘肃天水李子金矿床物质组分及金银赋存状态研究[J].地质与勘探,2011,47(5):837-845,9.基金项目
中国黄金集团科研项目（编号ZGHJ-KY201015）资助 （）
