Polyorogenic history of the East Greenland Caledonides

Feiko Kalsbeek, Kristine Thrane, A.K. Higgins, Hans F. Jepsen, A. Graham Leslie, Allen P. Nutman, Robert Frei

Publikation: Bidrag til bog/rapport/konferenceproceedingsBogkapitelForskningpeer review

30 Citationer (Scopus)

Abstrakt

The Caledonian orogen of East Greenland contains remnants of Archean, Paleoproterozoic, late Mesoproterozoic, and early Neoproterozoic rocks that occur within far-traveled thrust sheets, and bear witness to a complex polyorogenic history of the region prior to Caledonian orogenesis. Archean and Paleoproterozoic complexes consist mainly of granitoid orthogneisses. A succession of Paleoproterozoic tholeiitic metabasalts is present in some of the foreland windows. A major unit of late Mesoprotero zoic metasedimentary rocks (Krummedal supracrustal sequence) contains early Neoproterozoic (ca. 950 Ma) as well as Caledonian granites. There is evidence for Archean (ca. 2800-2600 Ma), Paleoproterozoic (2000-1750 Ma), and late Grenvillian (ca. 950 Ma) deformation and metamorphism, but Caledonian overprinting complicates the study of these events. This paper presents a broad overview of the various rock units with structural, geochemical, and geochronologic data. The Paleoproterozoic metabasaltic rocks from the foreland windows are described in more detail.

OriginalsprogEngelsk
TitelThe Greenland Caledonides: Evolution of the Northeast Margin of Laurentia
RedaktørerA.K. Higgins, Jane A. Gilotti, M. Paul Smith
ForlagGeological Society of America
Sider55-72
Antal sider18
ISBN (Trykt)9780813712024
DOI
StatusUdgivet - 2008

Publikationsserier

NavnGeological Society of America Memoir
ForlagGeological Society of America
Vol/bind202

Programområde

  • Programområde 4: Mineralske råstoffer

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