| 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：.1982.The late Mesozoic volacnic formations of the Lower Yangze Valley region[J].Mineral Deposits,1(1):25~34 |
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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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