New constraints on regional brecciation in the Wernecke Mountains, Canada, from He, Ne, Ar, Kr, Xe, Cl, Br and I in fluid inclusions

Kendrick, Mark A.; Honda, Masahiko; Gillen, David; Baker, Tim; Phillips, David

doi:10.1016/j.chemgeo.2008.05.021

Cited by 24 publications

(6 citation statements)

References 51 publications

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“…Recent studies of ore fluids related to IOCG-deposits using Br/Cl ratios have revealed a complex scenario and interpretations either supporting a magmatic origin, a mixture of magmatic and non-magmatic fluids or a mainly non-magmatic origin (e.g. Kendrick et al, 2006Kendrick et al, , 2008Chiaradia et al, 2006;Baker et al, 2008;Fisher and Kendrick, 2008;Williams et al, 2010;Marschick et al, 2011;Smith et al, 2013).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Metallogeny of the Northern Norrbotten Ore Province, northern Fennoscandian Shield with emphasis on IOCG and apatite-iron ore deposits

Martinsson

Billström

Broman

et al. 2016

Ore Geology Reviews

105

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The Northern Norrbotten Ore Province in northernmost Sweden includes the type localities for Kirunatype apatite iron deposits and has been the focus for intense exploration and research related to Fe oxide-Cu-Au mineralisation during the last decades. Several different types of Fe-oxide and Cu-Au±Fe oxide mineralisation occur in the region and include: stratiform Cu±Zn±Pb±Fe oxide type, iron formations (including BIF´s), Kirunatype apatite iron ore, and epigenetic Cu±Au±Fe oxide type which may be further subdivided into different styles of mineralisation, some of them with typical IOCG (Iron Oxide-Copper-Gold) characteristics. Generally, the formation of Fe oxide±Cu±Au mineralisation is directly or indirectly dated between ~2.1 and 1.75 Ga, thus spanning about 350 m.y. of geological evolution.The current paper will present in more detail the characteristics of certain key deposits, and aims to put the global concepts of Fe-oxide Cu-Au mineralisations into a regional context. The focus will be on iron deposits and various types of deposits containing Fe-oxides and Cu-sulphides in different proportions which generally have some characteristics in common with the IOCG style. In particular, ore fluid characteristics (magmatic versus non-magmatic) and new geochronological data are used to link the ore-forming processes with the overall crustal evolution to generate a metallogenetic model. Rift bounded shallow marine basins developed at ~2.1-2.0 Ga following a long period of extensional tectonics within the Greenstone-dominated, 2.5-2.0 Ga Karelian craton. The ~1.9-1.8 Ga Svecofennian Orogen is characterised by subduction and accretion from the southwest. An initial emplacement of calc-alkaline magmas into ~1.9 Ga continental arcs led to the formation of the Haparanda Suite and the Porphyrite Group volcanic rocks. Following this early stage of magmatic activity, and separated from it by the earliest deformation and metamorphism, more alkali-rich magmas of the Perthite Monzonite Suite and the Kiirunavaara Group volcanic rocks were formed at ~1.88 Ga. Subsequently, partial melting of the middle crust produced large volumes of ~1.85 and 1.8 Ga S-type granites in conjunction with subduction related A-/I-type magmatism and associated deformation and metamorphism. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTIn our metallogenetic model the ore formation is considered to relate to the geological evolution as follows. Iron formations and a few stratiform sulphide deposits were deposited in relation to exhalative processes in rift bounded marine basins. The iron formations may be sub-divided into BIF-(banded iron formations) andMg-rich types, and at several locations these types grade into each other. There is no direct age evidence to constrain the deposition of iron formations, but stable isotope data and stratigraphic correlations suggest a formation within the 2.1-2.0 Ga age range. The major Kiruna-type ores formed from an iron-rich magma (generally with a hydrothermal over-print) and are restricted to areas occup...

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Section: Accepted Manuscriptmentioning

confidence: 99%

“…During the Svecofennian period, the Karelian evaporites might have been transformed into metaevaporites, including scapolite, and this mineral has been suggested as a possible source for chlorine in hydrothermal fluids (Fisher and Kendrick, 2008;Kendrick et al, 2008). Apart from Aitik, with a 1000xBr/Cl molar ratio of 4.4 ( Fig.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Metallogeny of the Northern Norrbotten Ore Province, northern Fennoscandian Shield with emphasis on IOCG and apatite-iron ore deposits

Martinsson

Billström

Broman

et al. 2016

Ore Geology Reviews

105

View full text Add to dashboard Cite

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“…These values are within the range from the atmosphere (295.5) and upper mantle (4000-44000) to the crust (1650-170000) (e.g., Allegre et al, 1987;Staudacher et al, 1989;O'Nions and Tolstikhin, 1994;Burnard et al, 1997;Moreira et al, 1998;Kendrick et al, 2008). The Jinchuan silicate minerals have higher 40 Ar/ 36 Ar ratios (307-34284, av.…”

Section: Isotopic Compositions Of He Ne and Armentioning

confidence: 95%

Noble gas isotopic constraints on the origin and evolution of the Jinchuan Ni–Cu–(PGE) sulfide ore-bearing ultramafic intrusion, Western China

Zhang

Tang

et al. 2013

Chemical Geology

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“…The 40 Ar abundances of the Podong intrusion range from 4.15 to 744 56 × 10 −6 cm3 • STP/g, which is much higher than the Jinchuan intrusion (0 04-21 70 × 10 −6 cm3 • STP/g) [22] and the Poyi intrusion (0 14-0 50 × 10 −6 cm3 • STP/g) [10]. The 40 Ar/ 36 Ar ratios in the Podong intrusion vary from 285.29 to 398.11, which are close to the atmosphere (295.5) and lower than the crust (1650-170000) and the mantle (295.5-8000) [36,42,[44][45][46]. Figure 3) and had played a key role in the processes of triggering sulfide saturation and mineralization [3,4,10,11].…”

Section: Geofluidsmentioning

confidence: 96%

The Petrogenesis of the Permian Podong Ultramafic Intrusion in the Tarim Craton, Western China: Constraints from C-He-Ne-Ar Isotopes

Zhang

Feng

et al. 2019

Geofluids

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The Podong Permian ultramafic intrusion is only one ultramafic intrusion with massif Ni-Cu sulfide mineralization in the Pobei layered mafic-ultramafic complex, western China. It is obviously different in sulfide mineralization from the nearby coeval Poyi ultramafic intrusion with the largest disseminated Ni-Cu sulfide mineralization and mantle plume contribution (Zhang et al., 2017). The type and addition mechanism of the confirmed crustal contaminations and possible mantle plume involved in the intrusion formation require evidences from carbon and noble gas isotopic compositions. In the present study, we have measured C, He, Ne, and Ar isotopic compositions of volatiles from magmatic minerals in the Podong ultramafic intrusion. The results show that olivine, pyroxene, and plagioclase minerals in the Podong intrusion have variable δ13C of CO2 (-24.5‰ to -3.2‰). The CH4, C2H6, C3H8, and C4H10 hydrocarbon gases show normal or partial reversal distribution patterns of carbon isotope with carbon number and light δ13C1 value of CH4, indicating the hydrocarbon gases of biogenic origin. The δ13C of CO2 and CH4 suggested the magmatic volatile of the mantle mixed with the volatiles of thermogenic and crustal origins. Carbon and noble gas isotopes indicated that the Podong intrusion could have a different petrogenesis from the Poyi ultramafic intrusion. Two types of contaminated crustal materials can be identified as crustal fluids from subducted altered oceanic crust (AOC) in the lithospheric mantle source and a part of the siliceous crust. The carbon isotopes for different minerals show that magma spent some time crystallizing in a magma chamber during which assimilation of crustal material occurred. Subduction-devolatilization of altered oceanic crust could be the best mechanism that transported large proportion of ASF (air-saturated fluid) and crustal components into the mantle source. The mantle plume existing beneath the Poyi intrusion could provide less contribution of real materials of silicate and fluid components.

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New constraints on regional brecciation in the Wernecke Mountains, Canada, from He, Ne, Ar, Kr, Xe, Cl, Br and I in fluid inclusions

Cited by 24 publications

References 51 publications

Metallogeny of the Northern Norrbotten Ore Province, northern Fennoscandian Shield with emphasis on IOCG and apatite-iron ore deposits

Metallogeny of the Northern Norrbotten Ore Province, northern Fennoscandian Shield with emphasis on IOCG and apatite-iron ore deposits

Noble gas isotopic constraints on the origin and evolution of the Jinchuan Ni–Cu–(PGE) sulfide ore-bearing ultramafic intrusion, Western China

The Petrogenesis of the Permian Podong Ultramafic Intrusion in the Tarim Craton, Western China: Constraints from C-He-Ne-Ar Isotopes

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