| 李志群,任治Ji.一种亟待重新认识的铜矿床——滇中土状铜矿[J].地质与勘探,2000,(3):11-14 |
| 一种亟待重新认识的铜矿床——滇中土状铜矿 |
| THE COPPER DEPOSIT NEED TO BE RECOGNIZED AGAIN |
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| DOI： |
| 中文关键词: 土状铜矿 矿床特征 控矿因素 铜矿床 矿床成困 |
| 英文关键词: earthy copper deposits, deposits' characters, ore-control factors, origin, the middle area of Yunnan province |
| 基金项目:云南省自然科学基金资助项目!(项目编号 1999D0 10 3M)，国家“九·五”科技攻关项目!(编号 95 -914 -0 1-0 3 -0 5 )资助 |
| 李志群 任治Ji |
西南有色地质勘查局地质研究所!昆明650216(李志群，李锦武)
，西南有色地质勘查局!昆明650011(任治礻几)
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| 中文摘要: |
| 滇中土铜矿长期被认为是一种不可利用的铜矿床，新的湿法冶金技术应用使之成为了效益型铜资源。滇中土状铜矿产于中元古界昆阳群落雪组的土状风化壳内，分为面型和线型两种矿床类型。主要铜矿物为孔雀石、硅孔雀石、微粒状赤铜矿和黑铜矿、少量残余含铜硫化物。其矿石平均品位同于原生硫化矿。与原生矿石相比，土状氧化铜矿石ＳｉＯ２、Ａｌ２Ｏ３、Ｆｗ２Ｏ３、Ｍｎｏ明显富集，ＣａＯ与ＭｇＯ大量淋失，由碱性矿石变成了可酸浸的非 |
| 英文摘要: |
| Earthy copper deposits in the middle area of Yunnan province have been regarded as an unworthy copper mineral resources for a long time. The new hydrometallurgical technology made these deposits become one of the effective mineral resources. These earthy copper deposits exist in the earthy weathering curst on the surface of Luoxie Formation of Kunyang Group of Pt 2 and are divided into planar and linear types. Main copper minerals are malachite, crysocola, microgranular cuprite and tenorite and residual sulfide minerals. The average copper content of the ores is higher than those of primary sulfide ones. The earthy copper ores are rich SiO 2,Al 2O 3,Fe 2O 3 and MnO.CaO and MgO were leached out and the ores become nonalkali from alkali. There's no secondary copper sulfide enrichment zone. The secondary copper enrichment subzone locates in the oxidation zone and this is obviously different from supergene zones of typical sulfide deposits. The main ore-control factors are strata lithological characters, hydrologic geology, landform and structures. |
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