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   Articles with "meguma terrane" as a keyword



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An autochthonous Avalonian basement source for the latest Ordovician Brenton Pluton in the Meguma terrane of Nova Scotia: U–Pb–Hf isotopic constraints and paleogeographic implications

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recommendations! Published in 2017 at "International Journal of Earth Sciences"

DOI: 10.1007/s00531-017-1495-4

Abstract: The Ediacaran–Ordovician Meguma Supergroup was thrust over Avalonia basement prior to the intrusion of post-Acadian, ca. 370 Ma, S-type granitic batholiths. This has led to two main hypotheses regarding the original location of the Meguma terrane,… read more here.

Keywords: avalonia; meguma; brenton pluton; meguma terrane ... See more keywords

Post-accretionary exhumation of the Meguma terrane relative to the Avalon terrane in the Canadian Appalachians

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recommendations! Published in 2018 at "Tectonophysics"

DOI: 10.1016/j.tecto.2018.10.016

Abstract: Abstract The accretion of the Avalon and Meguma terranes to the Laurentian margin was a major event in the development of the Appalachian orogen. The Minas Fault Zone delineates the boundary between these terranes. A… read more here.

Keywords: avalon; meguma; age; meguma terrane ... See more keywords

Derivation of the Early Carboniferous Wedgeport pluton by crystal fractionation of a mafic parental magma: a rare case of an A-type granite within the Meguma terrane (Nova Scotia, Canada)

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recommendations! Published in 2019 at "Geological Magazine"

DOI: 10.1017/s0016756819000694

Abstract: Abstract The Cambrian–Ordovician metasedimentary rocks of the Meguma terrane (Canadian Appalachians) were extensively intruded by silicic plutons during Middle Devonian to Early Carboniferous times. Syn-plutonic but volumetrically minor mafic-ultramafic intrusions were also emplaced. In most… read more here.

Keywords: pluton; early carboniferous; wedgeport pluton; meguma terrane ... See more keywords

Long-lived association between Avalonia and the Meguma terrane deduced from zircon geochronology of metasedimentary granulites

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recommendations! Published in 2019 at "Scientific Reports"

DOI: 10.1038/s41598-019-40673-9

Abstract: The Acadian Orogeny of the Northern Appalachians was caused by accretion of the peri-Gondwanan terranes Avalonia and Meguma to the eastern margin of Laurentia during the Devonian. The lithotectonic relationship between Avalonia and Meguma prior… read more here.

Keywords: meguma terrane; geochronology; avalonia meguma;

Devonian plutons in the eastern Meguma terrane, Nova Scotia, Canada: zircon U-Pb, Lu-Hf and O isotopic compositions, age, and petrogenetic implications

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recommendations! Published in 2024 at "Canadian Journal of Earth Sciences"

DOI: 10.1139/cjes-2024-0023

Abstract: Abundant granitic plutons intruded the eastern Meguma terrane of Nova Scotia in the middle- to late Devonian. Less voluminous diorite-tonalite and gabbro intrusions are associated with the granitic plutons along the northern margin of the… read more here.

Keywords: terrane; meguma terrane; zircon; eastern meguma ... See more keywords