| 李 峰.云南澜沧老厂矿区含铜黄铁矿体
的确认及其资源意义[J].地质与勘探,2012,48(3):592-600 |
| 云南澜沧老厂矿区含铜黄铁矿体
的确认及其资源意义 |
| Determination of Copper-bearing Pyritic Ore Body in the Laochang Deposit ofLancang County,Yunnan Province and Its Resource Significance |
| 投稿时间：2010-10-25 修订日期：2012-01-20 |
| DOI： |
| 中文关键词: 含铜黄铁矿体 地质特征 成因 资源意义 澜沧老厂 |
| 英文关键词: copper-bearing pyrite body,geological character,genesis,resource significance,Laochang in Lancang |
| 基金项目:国家危机矿山接替资源勘查项目(编号:200653056;20089943)资助 |
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| 中文摘要: |
| [摘 要] 云南澜沧老厂多金属矿床是滇西昌宁-孟连晚古生代裂谷带中的重要矿床之一。2008 年以来,在矿区玉号铅锌银矿体群之下发现和确认新的含铜黄铁矿体群(V 号矿体群)。该类矿体群受地层及岩性控矿明显,赋存于下石炭统裂谷型火山-沉积建造中(C+615),产状与含矿地层一致,围岩主要为凝灰岩、沉凝灰岩和白云质灰岩。矿石中常见微细粒结构和纹层状构造。它与玉号矿体群之间构成“上黑下黄冶的矿体分带。尽管矿体受后期构造影响变形,并受新生代岩浆热液成矿作用的改造-叠加,但仍具有火山喷流成因块状硫化物矿床的基本特征。研究还表明,本类矿体中铜的资源储量达到中型规模,是矿区重要的成矿类型和资源类型之一,可作为良好的近期接替资源,对其开发利用,能大幅缓解矿山的资源危机。 |
| 英文摘要: |
| Abstract:The Laochang polymetallic deposit in Lancang county,Yunnan Province is one of the important deposits in the southern part of the Changning-Menglian late-Palaeozoic continental rift belt. Since 2008,some new copper-bearing pyritic bodies,called No. 5 ore cluster,have been discovered and
confirmed beneath the sequence of No. 1 Pb-Zn-Ag ore cluster in this deposit. This kind of ore bodies,whose attitude is similar to that of ore-bearing
strata,occurs in the Lower Carboniferous basic volcanic-sedimentary formation formed in a continental rift environment and is mainly controlled by the strata and lithology. Their host rocks are mainly tuff,tuffite and dolomitic limestone. The ores in No. 5 ore cluster are characterized by micro-fine grained textures and striped-lamellar structures. An “upper black-lower yellow'type ore body zone bounds between No. 1 and No. 5 ore clusters. Although the ore bodies were subjected to intense deformation from late tectonic activity and to transformation-superimposition from the Himalayan magmatic hydrothermal process,they still have the general characters of the volcanic-exhalative-sedimentary massive sulfide deposits. This study also indicates that the No. 5 ore cluster is one of the important mineralization types and resource types in the region. Because of attaining to a medium-sized copper deposit in the total resources of Cu,it will be a good recent succeeding resource which is expected to be explored and used gradually through the combination of exploration and
mining,and will reduce the resource crisis by a large scale in the mine. |
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