Magnetite bombs at El Laco volcano, Chile
Magnetite bombs at El Laco volcano, Chile
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DOI：
10.1080/11035899809453216
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发表时间：
1998-09-01
期刊：
影响因子：
1
通讯作者：
Nyström, JO
中科院分区：
文献类型：
--
作者：
Henríquez, F;Nyström, JO
基律纳型磷灰石铁矿的起源仍然存在争议，特别是构成主要矿床大部分的几乎纯磁铁矿的形成。保存最完好的这种矿石出现在El Lace火山的两侧，这是智利安第斯山脉的一座上新世-更新世火山。根据最近的研究，一组工作人员认为，El Lace矿床是由热液流体形成的。然而，在某些矿体中存在由磁铁矿晶体辐射多孔聚集体组成的弹道火山弹，表明磷灰石铁矿可以直接由熔体形成。
The origin of apatite iron ores of the Kiruna type remains controversial, especially the formation of almost pure magnetite that constitutes large parts of major deposits. The best preserved ores of this type occur on the flanks of El Lace, a Plio-Pleistocene volcano in the Chilean Andes. Based on recent studies a group of workers argues that the El Lace deposits were formed by hydrothermal fluids. However, existence of ballistic volcanic bombs composed of radiating porous aggregates of magnetite crystals in some of the orebodies, demonstrates that apatite iron ores can form directly from a melt.