An uncommon episode of mafic magmatism at 1347Ma in the Mesoproterozoic Telemark supracrustals, Sveconorwegian orogen—Implications for stratigraphy and tectonic evolution

Corfú, Fernando; Laajoki, K.

doi:10.1016/j.precamres.2007.08.003

Cited by 20 publications

(11 citation statements)

References 39 publications

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“…1, 350-1,340 Ma (Å häll and Conelly 1998;Andersson et al 2002). Rather than implying the existence of an exotic ''Telemarkia'' terrane, the mafic rock dated by Corfu and Laajoki (2007) provide evidence that this magmatism is more widespread in Fennoscandia than previously thought.…”

Section: Supracrustal and Infracrustal Rocks Of The Byglandsfjorden Gmentioning

confidence: 94%

“…Å häll et al 1996;Bingen et al 2005;Corfu and Laajoki 2007) are in general based only on dating of metaigneous rocks found at the present-day surface. For example, the ''Telemarkia'' models of Bingen et al (2005), which assume that no continental crust older than early Mesoproterozoic exists in present-day southern Norway, fail to take into account Nd, Pb and Hf isotope evidence for the existence of much older rocks in the unexposed crust.…”

Section: Supracrustal and Infracrustal Rocks Of The Byglandsfjorden Gmentioning

confidence: 99%

“…Recently, Corfu and Laajoki (2007) dated a mafic intrusion in central Telemark at 1,347 ± 4 Ma, and interpreted this date as evidence in favour of an exotic origin relative to Fennoscandia for the Telemark block. Although the period between the end of the Hallandian tectonothermal event ca.…”

Section: Supracrustal and Infracrustal Rocks Of The Byglandsfjorden Gmentioning

confidence: 99%

“…The tectonostratigraphic status of the Precambrian basement of southern Norway within the Fennoscandian shield is controversial (see Å häll et al 1996;Bingen et al 2005;Corfu and Laajoki 2007;Andersen 2005a, and references therein). According to one line of thought, based almost exclusively on U-Pb age determinations on exposed rocks, present-day South-Central Norway is an exotic continental fragment (''SW Norwegian Craton'' of Å häll et al 1996;''Telemarkia'' of Bingen et al 2005) accreted onto the Fennoscandian Shield in Mesoproterozoic time.…”

Section: Introductionmentioning

confidence: 99%

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Recurrent mesoproterozoic continental magmatism in South-Central Norway

Pedersen

Andersen

Konnerup-Madsen

et al. 2008

Int J Earth Sci (Geol Rundsch)

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We report U-Pb dates and Lu-Hf isotope data, obtained by LAM-ICPMS, for zircons from metamorphic rocks of the Setesdalen valley, situated in the Telemark block south of the classic Telemark region of southern Norway. The samples include infracrustal rocks from the metamorphic basement, metaigneous rocks and metasediments from the Byglandsfjorden supracrustal cover sequence, and metaigneous rocks which intruded the whole succession. The main crustal evolution took place from 1,550-1,020 Ma, beginning with the emplacement of juvenile tonalitic melts; the contribution of older crustal material increased with time. Around 1,320 Ma, further addition of juvenile material occurred, involving both mafic and felsic melts, metamorphism and deformation. Acid magmas with high FeO*/MgO were intruded at 1,215 Ma, coinciding with underplating elsewhere in South Norway. The period starting at 1,215 Ma is represented by supracrustal rocks, principally metarhyolites with minor mafic material and immature sediments of the Byglandsfjorden Group. The crust generation processes ended with the intrusion of diorites and granodiorites at 1,030 Ma, late in the Sveconorwegian orogeny. Regional processes of metamorphism and deformation (around 1,290 and 1,000 Ma) can be related to the assembly of Rodinia.

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Section: Supracrustal and Infracrustal Rocks Of The Byglandsfjorden Gmentioning

confidence: 94%

Section: Supracrustal and Infracrustal Rocks Of The Byglandsfjorden Gmentioning

confidence: 99%

Section: Supracrustal and Infracrustal Rocks Of The Byglandsfjorden Gmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recurrent mesoproterozoic continental magmatism in South-Central Norway

Pedersen

Andersen

Konnerup-Madsen

et al. 2008

Int J Earth Sci (Geol Rundsch)

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“…2), which contains several sandstone-and mudstone-bearing formations deposited in diverse environments and complexly faulted into several internally folded blocks. Sedimentation of the Vindeggen Group is bracketed between ca 1.495 and 1.347 Ga (Laajoki and Corfu, 2007;Corfu and Laajoki, 2008). The tidal-shallow marine Brattefjell Formation represents the topmost part of the Vindeggen Group and the depositional basement for the approximately 200-m-thick Svinsaga Formation, which is the lowermost unit of the Oftefjell Group and focus of this study (Fig.…”

Section: Regional Lithostratigraphymentioning

confidence: 99%

The sedimentation and paleohydrology of the Mesoproterozoic stream deposits in a strike–slip basin (Svinsaga Formation), Telemark, southern Norway

Köykkä

2011

Sedimentary Geology

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Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion”

Zhang

Ernst

Pei

et al. 2021

Geophysical Monograph Series

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Recent results on ca. 1,380 Ma LIPs and black shales indicate a temporal link between LIPs and black shales and suggest a potential way for using coeval LIPs and black shales as natural markers for boundaries in the Mesoproterozoic timescale. In this chapter, we provide a brief review of LIPs and black shales during "the Boring Billion" in different cratons. The results show that in addition to the ca. 1,380 Ma LIP activity that is coeval with black shales, other major LIPs during this period can preliminarily be divided into several stages and are likely/possibly contemporaneous with black shales, especially the 1,650-1,620 Ma and ca. 1,100 Ma LIPs. Our results demonstrate that the global-scale LIPs and black shales in the Boring Billion can potentially be used as natural markers for subdivisions of the Proterozoic timescale. The results also suggest that, while the Boring Billion was characterized by suboxic or mildly oxygenated marine basins, it was interrupted by several OAEs that are partly caused by the environmental impact of LIPs. Preliminarily proposed correlation of LIPs and black shales provide a new way to explain the fluctuating evolution of atmosphere, life, and marine basins during the Boring Billion as identified by many recent studies.

show abstract

An uncommon episode of mafic magmatism at 1347Ma in the Mesoproterozoic Telemark supracrustals, Sveconorwegian orogen—Implications for stratigraphy and tectonic evolution

Cited by 20 publications

References 39 publications

Recurrent mesoproterozoic continental magmatism in South-Central Norway

Recurrent mesoproterozoic continental magmatism in South-Central Norway

The sedimentation and paleohydrology of the Mesoproterozoic stream deposits in a strike–slip basin (Svinsaga Formation), Telemark, southern Norway

Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion”

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