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在宁芜断陷盆地北段江苏境内,发现有内生成因的假象赤铁矿矿床.最先发现于凤凰山,不久在梅山、其林山等地又发现有同样的矿床.本文仅对有代表性的其林山(以东庄矿体为主)假象赤铁矿的成因,作一简单介绍,以供进一步研究. 假象赤铁矿是赤铁矿交代磁铁矿,按磁铁矿晶形形成假象的现象.大多数人认为,假象赤铁矿发生在热带干旱气候条件下,磁铁矿矿床的氧化带中.磁铁矿被热液普遍氧化为假象赤铁矿并大量产出的现象,在我国比较少见.最近,徐国风对河南某斑岩型多金属硫铁矿作了片断介绍,如果那种假象赤铁矿同样是大量发育,那么假象赤铁矿的内生成因就有可能具有普遍意义(地质与勘探,1982年,10期).
Found in the north of Ningwu rift basin in Jiangsu Province, there are endogenetic artifacts hematite deposits first found in the Phoenix Mountain, and soon found in Meishan, Lin Mountain and other places have the same deposit.This article only representatives A brief description of the origin of its Hsuehshan (mainly Dongchengzhuang ore body) illusion hematite is provided for further study. The illusion hematite is a hematite metanomagnetite that forms an illusion according to the crystal form of the magnetite Most people think that the illusion hematite occurs in the oxidation zone of the magnetite deposit in the tropical arid climate.The magnetite is generally oxidized by the hydrothermal solution into illusion hematite and is produced in a large amount at Recently, Xu Guofeng introduced a piece of porphyry-type polymetallic pyrite in Henan Province. If the illusion hematite is likewise extensively developed, it is possible that the illusion of hematite may have a universal significance (Geology and Exploration, 1982, 10).