Caught between two continents: First identification of the Ediacaran Central Iapetus Magmatic Province in Western Svalbard with palaeogeographic implications during final Rodinia breakup

Gumsley, Ashley; Manby, Geoffrey; Domańska−Siuda, Justyna; Nejbert, Krzysztof; Michalski, Krzysztof

doi:10.1016/j.precamres.2020.105622

Cited by 17 publications

(3 citation statements)

References 72 publications

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“…Slagstad et al (2021) correlated the c. 578 Ma Umbukta gabbro in the Rödingsfjellet Nappe Complex of the northern Scandinavian Caledonides, traditionally thought to originate from the Laurentian margin, with the SIP, also suggesting a non-Baltican origin of the SIP magmatism. Gumsley et al (2020) also compare c. 560 Ma alkali and OIB-like mafic rocks from the southwestern province of Svalbard with the SIP, pointing at the difficulties in palaeogeographically reconstructing these occurrences within the wide Baltica-Laurentia-Gondwana system.…”

Section: Magma-rich Margin Sections and The Central Iapetus Magmatic ...mentioning

confidence: 93%

A review of the Caledonian Wilson cycle from a North Atlantic perspective

Gasser,

Majka,

Jakob

et al. 2024

JGS

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The opening and closure of the Paleozoic Iapetus Ocean, leading to the collision of Laurentia and Baltica forming the Caledonian orogen, is one of the prime examples of a Wilson Cycle. In this perspective article, we summarize and discuss the content of 10 new research articles within a 5-stage framework of the Caledonian Wilson cycle from a North Atlantic perspective. Stage 1 covers Neoproterozoic rifting of both the Laurentian and Baltican margins, where the plate tectonic configurations and the timing for the onset of rifting are far from resolved; Stage 2 covers the onset of sea-floor spreading within Iapetus, with several different oceanic basins opening at different times, and with variable geometries of the rifted margins; Stage 3 covers the narrowing of the Iapetus basins along several subduction zones, the number, location and orientation of which are debated; Stage 4 covers the main continent-continent collision, documenting advances in our understanding of (U)HP metamorphism within the Western Gneiss Region; Stage 5 covers post-orogenic extension, transitioning into stage 1 of the subsequent Atlantic Wilson cycle. We review the evolution of the Caledonian Wilson cycle in the light of the recent literature from the past decade and highlight open questions and unresolved issues. Thematic collection: This article is part of the Caledonian Wilson cycle collection available at: https://www.lyellcollection.org/topic/collections/the-caledonian-wilson-cycle

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Section: Magma-rich Margin Sections and The Central Iapetus Magmatic ...mentioning

confidence: 93%

A review of the Caledonian Wilson cycle from a North Atlantic perspective

Gasser,

Majka,

Jakob

et al. 2024

JGS

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“…For ma tion of the Cen tral Iapetus Mag matic Prov ince (CIMP; so-called East ern Iapetus), as a sec ond phase, took place in a time span of 635-550 Ma, in two stages. The first stage, from 620 to 600 Ma (Gumsley et al, 2020), was char acter ised by con ti nen tal tholeiitic magmatism, of sub con ti nen tal lithospheric man tle der i va tion and ad mix ture of man tle plume (Youbi et al, 2020 and ref er ences therein). The sec ond stage (590-550 Ma) was char ac ter ised by al kali-rich, OIB-like magmatism (Gumsley et al, 2020).…”

Section: Implication For Neoproterozoic Palaeogeographymentioning

confidence: 99%

“…The first stage, from 620 to 600 Ma (Gumsley et al, 2020), was char acter ised by con ti nen tal tholeiitic magmatism, of sub con ti nen tal lithospheric man tle der i va tion and ad mix ture of man tle plume (Youbi et al, 2020 and ref er ences therein). The sec ond stage (590-550 Ma) was char ac ter ised by al kali-rich, OIB-like magmatism (Gumsley et al, 2020). The Tornquist Ocean had not yet opened, de vel op ing at ~550 Ma from a trans form fault (Rob ert et al, 2021).…”

Section: Implication For Neoproterozoic Palaeogeographymentioning

confidence: 99%

Neoproterozoic ophiolite exotic blocks in the Outer Western Carpathians, southern Poland: a record of the fast ocean-floor cooling and alterations

DURKOWSKI¹

2023

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Ophiolitic blocks, rep re sented by metagabbro and ser pen tin ite con tain ing rel ict pyroxene, ol iv ine, baddeleyite, zirconolite, Ni-py rite and pyrrhotite, were found as ex otic blocks in an olistostrome in the Magura Nappe, Outer West ern Carpathians. The geo chem i cal and iso to pic fea tures of the blocks sug gest they rep re sent man tle-de rived rocks, with within-plate geochem is try sig na tures, mod i fied by subduction, with lithospheric man tle in put. A U-Pb ap a tite cool ing age (614 ±3 Ma) is within age un cer tainty of a pub lished U-Pb zir con mag matic crys tal li za tion age (~614 Ma) im ply ing rapid post-crys tal li za tion cool ing. Per va sive al ter ation with re place ment of pri mary min er als by low-tem per a ture as sem blages is ob served in all rock frag ments and is in ter preted as con tem po ra ne ous with shear ing. The sec ond ary min eral as sem blages and tem per a ture mod el ling al low the in ter pre ta tion that the per va sive ocean-floor meta mor phism is the al ter ation in these meta-mafic rocks. These ophiolitic frag ments can be linked to the Neoproterozoic break up of Rodinia/Pannotia.

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