山东莱芜张家洼铁矿平炉富矿和伴生的铜钴组分研究

山东莱芜张家洼铁矿赋存于矿山弧形背斜倾没端,已查明平炉富矿资源储量7 060×104t,伴生组分铜金属资源储量217 256.1t,钴金属资源储量48 548.3t。根据平炉富矿、伴生组分铜钴主要分布在假整合面及其复合部位,以及赋存在本溪组中的矿床（体）铁（铜）硫特高的特点,认为矿质与月门沟群本溪组中的山西式铁矿以及铁铝页岩层位中Fe,Cu,Co元素的高背景值有关。山西式铁矿和铁铝页岩层位或因热液作用就地改造叠加,在假整合面及附近形成复合矿体,并局部构成平炉富矿和伴生的铜、钴资源;或因构造沟通,被活化迁移至接触带与围岩中,产生双交代渗滤作用,形成接触带及附近的复合矿体,并构成少量平炉富矿与伴生的铜、钴资源。因此,山西式铁矿和本溪组铁铝页岩是平炉富矿和伴生组分铜、钴的重要物质来源。

Study on rich iron ore for martin steel and the by-products of Cu and Co in Zhangjiawa iron deposit of Shandong province

Zhangjiawa iron deposit is located at the plunge of Kuangshan arc anticline with proven rich iron ore resources of 7 060×104 t for martin steel making and by-product Cu 217 256.1 t and Co 48 548.3 t.According to the general occurrence of the rich iron ore and the by-products at the disconformity and structural superimpositions and tremendous high iron（copper） and sulfur contents of ore deposits（bodies） occrring in Benxi formation we consider that the ore materials are related to the high background values of Fe,Cu,Co of Shanxi style iron ore and Fe-Al shale of Benxi formation in Yuemengou group.Shanxi style iron ore and Fe-Al shale were in situ reworked and superimposed by hydrothermal fluid to form composite ore bodies at or near the disconformity and local rich iron ore for martin steel making and the by-product resources,or strutures channeled the hydrothermal fluid and transport the ore materials into contact zones and the wall rocks leading to bi-replacement filtration and formation of composite ore bodies at contact zone or nearby and small volume of rich iron ore for martin steel making and the by-products resources.Therefore,Shanxi style iron ore and Fe-Al shale are the main source for the rich iron ore for martin steel making and the by-products of Cu,Co.