Magmatic origin of giant 'Kiruna-type' apatite-iron-oxide ores in central Sweden.
Magmatic origin of giant 'Kiruna-type' apatite-iron-oxide ores in central Sweden.
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DOI:
10.1038/srep01644
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发表时间:
2013
影响因子:
4.6
通讯作者:
Skelton, Alasdair
中科院分区:
文献类型:
--
作者:
Jonsson, Erik;Troll, Valentin R.;Hogdahl, Karin;Harris, Chris;Weis, Franz;Nilsson, Katarina P.;Skelton, Alasdair
Iron is the most important metal for modern industry and Sweden is by far the largest iron-producer in Europe, yet the genesis of Sweden's main iron-source, the ‘Kiruna-type’ apatite-iron-oxide ores, remains enigmatic. We show that magnetites from the largest central Swedish ‘Kiruna-type’ deposit at Grängesberg have δ18O values between −0.4 and +3.7‰, while the 1.90−1.88 Ga meta-volcanic host rocks have δ18O values between +4.9 and +9‰. Over 90% of the magnetite data are consistent with direct precipitation from intermediate to felsic magmas or magmatic fluids at high-temperature (δ18Omgt > +0.9‰, i.e. ortho-magmatic). A smaller group of magnetites (δ18Omgt ≤ +0.9‰), in turn, equilibrated with high-δ18O, likely meteoric, hydrothermal fluids at low temperatures. The central Swedish ‘Kiruna-type’ ores thus formed dominantly through magmatic iron-oxide precipitation within a larger volcanic superstructure, while local hydrothermal activity resulted from low-temperature fluid circulation in the shallower parts of this system.
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DOI:
10.2113/gsecongeo.91.6.979
发表时间:
1996-09-01
期刊:
ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS
影响因子:
--
作者:
Allen, RL;Lundstrom, I;Christofferson, H
通讯作者:
Christofferson, H
影响因子:
5.8
作者:
PARAK, T
通讯作者:
PARAK, T
影响因子:
56.9
作者:
CRAIG, H
通讯作者:
CRAIG, H
影响因子:
3.5
作者:
Harris, C;Ashwal, LD
通讯作者:
Ashwal, LD
影响因子:
3.5
作者:
Harris, C;Smith, HS;le Roex, AP
通讯作者:
le Roex, AP