Metal source and tectonic setting of iron oxide-copper-gold (IOCG) deposits: Evidence from an in situ Nd isotope study of titanite from Norrbotten, Sweden

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• 作者：C.D. Storey^a ; ^{Craig.Storey@portsmout.ac.uk} ; M.P. Smith^b ; ^{martin.smith@brighton.ac.uk}
• 关键词：Titanite ; Kiruna ; Neodymium isotopes ; IOCG deposits
• 刊名：Ore Geology Reviews
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：81
• 期：part_P4
• 页码：1287-1302
• 全文大小：3087 K
• 卷排序：81

文摘

Nd isotope data from accessory minerals within IOA, Au and Cu deposits gives insight into the source of the metals Nd model ages suggest that the source of metals was separated from the mantle at the end of the Archaean Metals were likely extracted via basaltic magmatism in extension-related settings during craton break-up Metals remobilised by magmatism c.2.1 Ga, resulting in crustal differentiation and evolved volcanic, probably arc, magmas Mineralisation occurred by remobilisation of metals during pulses of hydrothermal activity and deformation at 1.9-1.8 Ga