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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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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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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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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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;