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首页> 外文会议>Iron ore 2011 >From Banded Iron Formation to Iron Ore – Genetic Models and Their Application in Iron Ore Exploration in the Hamersley Province, Western Australia
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From Banded Iron Formation to Iron Ore – Genetic Models and Their Application in Iron Ore Exploration in the Hamersley Province, Western Australia

机译：从带状铁矿到铁矿石–遗传模型及其在西澳大利亚州哈默斯利省铁矿石勘探中的应用

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摘要

High-grade iron ore may be derived from banded iron formation (BIF) through four fundamentallyrndifferent processes:rn1. syngenetic precipitation of chert free BIF,rn2. residual enrichment by removal of gangue minerals from BIF to form bedded (residual) ironrnore,rn3. mechanical erosion of iron oxide and chert from bedded iron ore or BIF and re-deposition andrnupgrading as detrital iron ore, andrn4. chemical removal of iron from BIF and precipitation elsewhere as a secondary (channel) ironrndeposit.rnFinally, the BIF itself may constitute iron ore if a high-grade concentrate utilised for pellets orrnsinters can be derived from it through mechanical (industrial) separation of iron oxide by meansrnof crushing/milling and mineral separation.rnHistorically, exploration for high-grade BIF hosted iron ores was focused on the residual (bedded)rndeposits and driven by supergene concepts. Exploration for detrital and channel type iron ores wasrnmostly secondary to exploration for bedded deposits, but recently, a more focused exploration effortrnhas led to the discovery of enormous moderate to low iron grade deposits in the Pilbara region ofrnWestern Australia. Exploration for high-grade iron ores using syngenetic concepts has been limited,rnbut together with exploration using hypogene concepts offers the best hope of fi nding concealedrndeposits. Exploration for BIF sources suitable for concentrate ores commenced in the 'old' iron orernprovinces after the high-grade resources were depleted and has only recently gained importance inrnAustralian BIF provinces, mainly as a result of high iron ore prices in the last decade.
机译：高品位铁矿石可通过四个基本不同的过程从带状铁矿形成（BIF）中提取。无石BIF，rn2的同系沉淀。通过从BIF去除脉石矿物来形成床状（残留）铁矿，从而实现剩余富集。层状铁矿石或BIF对氧化铁和石的机械侵蚀，并作为碎屑铁矿石重新沉积和升级，以及4。最终，如果可以通过机械（工业）分离氧化铁而从中获得用于球团矿的高品位精矿，则BIF本身可能构成铁矿石。从历史上看，从历史上讲，对高BIF寄主铁矿石的勘探主要集中在残余（层状）沉积物上，并由超基因概念驱动。碎屑和河道型铁矿石的勘探几乎次于层状矿床的勘探，但是最近，更加集中的勘探努力导致在西澳大利亚州的皮尔巴拉地区发现了巨大的中至低铁品位矿床。利用同系概念对高品位铁矿石进行勘探一直是有限的，但与利用表观概念进行勘探一起为寻找隐藏矿床提供了最大希望。在高品位资源枯竭之后，才开始在“老”铁矿省寻找适合于精矿的BIF来源，直到最近才在澳大利亚BIF省开始重视，这主要是由于过去十年中铁矿石价格居高不下。

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  • 来源
    《Iron ore 2011》|2011年|p.73-82|共10页
  • 会议地点 Perth(AU)
  • 作者

    H J Dalstra;

  • 作者单位

    Rio Tinto Exploration Pty Ltd, 37 Belmont Avenue, Belmont WA 6104. Email: hilke.dalstra@riotinto.com;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 铁矿石;
  • 关键词

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