Geochemistry, age, and origin of the Högberget granite, western Bergslagen, Sweden

Bergman, Torbjörn; Schöberg, Hans; Sundblad, Krister

doi:10.1080/11035899509546205

Cited by 11 publications

(1 citation statement)

References 41 publications

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“…As stated above, the ca 1785 Ma Hedesunda II granite, although falling within the timeframe of the late-orogenic anatectic GP rock suite within the Bergslagen lithotectonic unit, rather has A-type geochemical characteristics. Similar characteristics, however, have been found among a number of late Svecofennian granites in the Bergslagen region, such as the small Mo-W-bearing Pingstaberg, Skålhöjden, Bispbergs klack, and Högberget intrusions (Billström et al 1988;Sundblad et al 1993;Bergman et al 1995;Sundblad and Bergman 1997). Also the larger 1.77-1.78 Ga Lisjö and Fellingsbro granites have similar A-type and within-plate type characteristics and are believed to have formed in an extensional environment above an east-west-trending gravity low (Öhlander and Zuber 1988;Öhlander and Romer 1996).…”

Section: The Hedesunda I and Ii Granitoids Seen In A Wider Regional C...supporting

confidence: 56%

The Paleoproterozoic Hedesunda granite complex, east-central Sweden, a composite intrusion

Johansson

2020

Int J Earth Sci (Geol Rundsch)

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The Hedesunda granite complex covers a rectangular area of ca 800 km2 within the Bergslagen lithotectonic unit of the Paleoproterozoic Svecofennian orogen in east-central Sweden. It is dominated by coarse porphyritic and generally undeformed granitoids whose position within the Svecofennian orogenic evolution has been controversial. New U–Pb SIMS dating of zircon confirms earlier TIMS results, showing that it is a composite intrusion made up of an older phase at ca 1865 Ma, forming the bulk of the massif, and a younger phase at ca 1785 Ma, forming a circular intrusion in the north-central area and an elongated body further west. The two generations have very different geochemistry. The older Hedesunda I intrusion ranges from diorite through tonalite and granodiorite to granite in composition, is dominantly metaluminous, calc-alkaline, magnesian, I-type and volcanic arc-related, and probably formed by melting of juvenile Svecofennian lower crust due to basaltic underplating during an extensional ‘intra-orogenic’ phase shortly after the main subduction-related early-orogenic Svecofennian magmatism. The younger Hedesunda II intrusions are purely granitic, dominantly peraluminous, alkali-calcic, K-rich, and ferroan, with A-type and within-plate-type characteristics, and formed penecontemporaneously with post-collisional shoshonitic intrusions in southern Finland, again presumably by crustal melting due to basaltic underplating in an extensional setting towards the end of the Svecofennian orogeny.

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Section: The Hedesunda I and Ii Granitoids Seen In A Wider Regional C...supporting

confidence: 56%

The Paleoproterozoic Hedesunda granite complex, east-central Sweden, a composite intrusion

Johansson

2020

Int J Earth Sci (Geol Rundsch)

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Integration of remote-sensing, structural, and geochemical data for characterizing granitoid rocks in Um Naggat pluton, Central Eastern Desert, Egypt

et al. 2021

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Geological, geochemical and geochronological evidence for a new palaeoproterozoic terrane in southeastern Sweden

Mansfeld

1996

Precambrian Research

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Geochemistry, age, and origin of the Högberget granite, western Bergslagen, Sweden

Cited by 11 publications

References 41 publications

The Paleoproterozoic Hedesunda granite complex, east-central Sweden, a composite intrusion

The Paleoproterozoic Hedesunda granite complex, east-central Sweden, a composite intrusion

Integration of remote-sensing, structural, and geochemical data for characterizing granitoid rocks in Um Naggat pluton, Central Eastern Desert, Egypt

Geological, geochemical and geochronological evidence for a new palaeoproterozoic terrane in southeastern Sweden

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