| 铜官山铁铜矿床中显微球粒磁铁矿的发现及其成因意义 |
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| 引用本文：.1989.The discovery of microspherulitic magnetite in the tongguanshan iron-copper deposit and its genetlc signiflcance[J].Mineral Deposits,8(4):61~65 |
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| 中文摘要:借助电子显微镜首次在铜官山铁铜矿床中发现显微球粒磁铁矿。显微球粒磁铁矿主要呈连球状(或葡萄状)，少数为单球状，粒径0.7—1．8／Zm。这种与地层整合产出的显微球粒磁铁矿在产状、物性、波谱、微量元素、稀土元素及铅同位素诸方面均明显不周于接触交代(矽 卡岩)型磁铁矿，但与沉积成岩黄铁矿有相似之处。故认为这类磁铁矿可能为黄铁矿热变质产物。 |
| 中文关键词:铜官山 铁铜矿床 显微球粒磁铁矿 |
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| The discovery of microspherulitic magnetite in the tongguanshan iron-copper deposit and its genetlc signiflcance |
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| Abstract:By means of electron microscopy, microspherulitic magnetites were discovered for the first time in the Tongguanshan copper and iron deposit in 1987. 0.7-1. 8μm in dimension, they generally assuIne clustered bead form or bortyoidaI form with a few apgeat ing as single spherulites. The magnetite orebodies are obvriously hosted by MiddIe Carboniferous strata． The microspherulite magnetite(L-2-18)is different evidently from that of the Skarn type(X-I-2)in such aspects as mode of occurrence, physical properties, wave spectra, minor elements, REE and lead isotopes. Nevertheless, it is similar to the pyrite formed at the sedimentary-diagenetic stage. This sort of magnetite is theresore considered to be the product of thermal metamorphism of sedimentary-diagenetic pyrite. |
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