Facieology and Mineragraphy Characteristics of Lawu Zinc-Copper
详细信息
- 责任者：Liu Yan (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhao Yuanyi
- 刊名：Mineral Deposits
- 出版年：2010
- 卷期：29(6)
- 关键词：锌矿 ; zinc ores ; 铜矿 ; copper ores ; 西藏 ; Tibet
- 页码：p.1054-1078
- 图表：9 illus., 4 tables, 25 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
According to detailed field geological survey, indoor petrologic and mineralogical determination, SEM and EDS analysis, and ICP-MS spectral analysis, the authors studied facieology and mineragraphy characteristics of the Lawu zinc-copper polymetallic deposit. The main rock body of the ore deposit is muscovite monzonitic granite, with a clear decrepitation structure. The main skarn types are garnet skarn, diopside-bearing garnet skarn, garnet-diopside skarn and diopside skarn. The number of aluminum atoms is 0.36～0.86 in the gray part of zonal garnet and is 1.23～1.53 in the black part; nevertheless, the number of calcium atoms shows the opposite trend. The garnet ring implies that there have been 13 material exchange processes between magma and limestone strata. Skarn and the formation of the subsequent altered rock controlled mineralization.There appears granular changing trend of diopside-elongated diopside→sub-amphibole-epidote→ chlorite+ quartz→ carbonate+quartz in the garnet crystal.
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