Chemical fingerprint of iron oxides related to iron enrichment of banded iron formation from the Cauê Formation - Esperan?a Deposit, Quadrilátero Ferrífero, Brazil: a laser ablation ICP-MS study

Carlos Alberto Rosière; Francisco Javier Rios; Lucilia Aparecida Ramos De Oliveira; Renato De Moraes; Sandra Andrade

首页> 外文期刊>Brazilian Journal of Geology >Chemical fingerprint of iron oxides related to iron enrichment of banded iron formation from the Cauê Formation - Esperan?a Deposit, Quadrilátero Ferrífero, Brazil: a laser ablation ICP-MS study

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Chemical fingerprint of iron oxides related to iron enrichment of banded iron formation from the Cauê Formation - Esperan?a Deposit, Quadrilátero Ferrífero, Brazil: a laser ablation ICP-MS study

机译：与Cauê组中带状铁形成中铁富集有关的氧化铁的化学指纹-巴西Esperan？a矿床，QuadriláteroFerrífero：激光烧蚀ICP-MS研究

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Chemical signatures of iron oxides from dolomitic itabirite and high-grade iron ore from the Esperan?a deposit, located in the Quadrilátero Ferrífero, indicate that polycyclic processes involving changing of chemical and redox conditions are responsible for the iron enrichment on Cauê Formation from Minas Supergroup. Variations of Mn, Mg and Sr content in different generations of iron oxides from dolomitic itabirite, high-grade iron ore and syn-mineralization quartz-carbonate-hematite veins denote the close relationship between high-grade iron ore formation and carbonate alteration. This indicates that dolomitic itabirite is the main precursor of the iron ore in that deposit. Long-lasting percolation of hydrothermal fluids and shifts in the redox conditions have contributed to changes in the Y/Ho ratio, light/heavy rare earth elements ratio and Ce anomaly with successive iron oxide generations (martite-granular hematite), as well as lower abundance of trace elements including rare earth elements in the younger specularite generations.

机译：位于QuadriláteroFerrífero的白云岩伊铁矿的氧化铁和Esperan？a矿床的高级铁矿石的化学特征表明，涉及化学和氧化还原条件改变的多环过程是米纳斯超级集团Cauê地层富铁的原因。白云岩黄铁矿，高品位铁矿和同矿化石英-碳酸盐-赤铁矿脉中不同世代的铁氧化物中Mn，Mg和Sr含量的变化表明高品位铁矿形成与碳酸盐蚀变之间的密切关系。这表明白云岩伊塔岩是该矿床中铁矿石的主要前体。热液的长期渗滤和氧化还原条件的变化，导致了Y / Ho比，轻/重稀土元素比和Ce异常的变化，伴随着连续的氧化铁生成（马氏体-粒状赤铁矿），以及更低的在年轻的镜石一代中，大量的微量元素包括稀土元素。

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《Brazilian Journal of Geology》 |2015年第2期|共24页
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Carlos Alberto Rosière; Francisco Javier Rios; Lucilia Aparecida Ramos De Oliveira; Renato De Moraes; Sandra Andrade;
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2. Iron Oxide Mineralization at the Contact Zone Between Phyllite and Itabirite of the Pau Branco Deposit, Quadrilátero Ferrífero, Brazil— Implications for Fluid-Rock Interaction During Iron Ore Formation [J] . Ana-Sophie Hensler, Carlos A. Rosière, Steffen G. Hagemann Economic geology and the bulletin of the Society of Economic Geologists . 2017,第4期

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4. New Ore Types from the Cauê Banded Iron Formation, Quadrilátero Ferrífero, Minas Gerais, Brazil – Responses to the Growing Demand [C] . L Q Amorim, F F Alkmim Iron ore 2011 . 2011

机译：巴西米纳斯吉拉斯州QuadriláteroFerríferoCauê带状铁矿的新矿石类型–应对不断增长的需求
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7. Chemical fingerprint of iron oxides related to iron enrichment of banded iron formation from the Cauê Formation - Esperança Deposit, Quadrilátero Ferrífero, Brazil: a laser ablation ICP-MS study [O] . Lucilia Aparecida Ramos de Oliveira, Carlos Alberto Rosière, Francisco Javier Rios, 2015

机译：来自巴西Quadrilatero Ferrifer的Cau Formation - Esperança矿床带状铁形成铁富集的铁氧化物的化学指纹：激光烧蚀ICp-ms研究

Chemical fingerprint of iron oxides related to iron enrichment of banded iron formation from the Cauê Formation - Esperan?a Deposit, Quadrilátero Ferrífero, Brazil: a laser ablation ICP-MS study

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