| 有关长江下游中生代晚期火山岩系中铁矿的若干问题 |
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| 引用本文： | 张炳焙.有关长江下游中生代晚期火山岩系中铁矿的若干问题[J].矿床地质,1982,1(1):25-34. |
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| 作者姓名： | 张炳焙 |
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| 作者单位： | 地质部地质矿产司 |
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| 摘 要： | 引言长江下游南京-芜湖(宁芜)和庐江-枞阳(庐枞)两个中生代晚期火山岩盆地中的铁矿,经过近年来各部门的地质队伍、科研单位及院校的详细工作,基本上查明了矿床的赋有状态、蚀变特征、矿石特点和成矿的主要控制因素,并在宁芜地区根据各种类型铁矿床之间的成因联系,建立了“玢岩铁矿”模式。虽然对“玢岩模式”的名称还有不同意
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The late Mesozoic volacnic formations of the Lower Yangze Valley region |
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| Abstract: | The iron ore deposits in the Late Mesozoic volcanic formations of theLower Yangtze Valley region, particularly those of the Nanjing-Wuhu andthe Lujiang-Zongyang areas, have been studied in detail in recent years,and the term "porphyrite iron ore deposits" has been proposed to denotethe genetically interrelated series of different types of iron ore depositsin this region. The predominant features of mineralization of differenttypes or stages included in this series, especially the paragenetic relationships between the oxide and sulfide minerals of iron and the sulfide minerals of iron and copper as well as the general trend of evolution of themagmas associated, as compared respectively with other wellknown typesof iron and copper deposits such as skarn type, Klruna type, massivesulfide type and porphyry copper, indicate the possible existence of certain parallelism in the development between them. It is suggested tentativelythat the origin of the types of ore deposits discussed may be directly orindirectly related to deep magmatic sources probably of maficultramaficcomposition.Differences among the various types concerncd are consideredto depend on the stage of evolution of the source at which the main ore-forming material separated and the geological environment into which theore bearing magma andlor the ore-forming fluid entered. |
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