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Journal Article
Published: 05 February 2019
Journal of the Geological Society (2019) jgs2018-174.
... present U–Pb, Lu–Hf, rare earth element zircon and structural data for the SIB of Zambia, which are used to investigate its formation, evolution, and relationship to the Irumide Belt of the southern Congo Craton. Orthogneiss in the Chewore–Rufunsa and Chipata terranes yield ages between c. 2040 to 2000 Ma...
Journal Article
Published: 01 February 2019
Italian Journal of Geosciences (2019) 138 (1): 136-152.
...Gabriele Cruciani; Dario Fancello; Marcello Franceschelli; Giovanni Musumeci ABSTRACTThe Mt. Filau orthogneiss is an Ordovician orthogneiss outcropping in the External zone of SW Sardinia chain. It consists of dark, biotite-rich facies, a leucocratic coarse-grained facies and a leucocratic fine...
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Journal Article
Published: 01 January 2019
American Mineralogist (2019) 104 (1): 17-30.
... and neoblastic minerals forming variably deformed high-grade orthogneiss. The Cretaceous orthogneiss from Fiordland, New Zealand, comprises intermediate omphacite granulite interlayered with basic eclogite, which was metamorphosed and deformed at T ≈ 850 °C and P ≈ 1.8 GPa after protolith cooling. Detailed...
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Journal Article
Journal: Lithosphere
Published: 11 October 2018
Lithosphere (2018) 10 (6): 760-782.
... (Canada). The YRSZ is a NW-SE–striking shear zone that juxtaposes Mississippian orthogneiss hanging-wall rocks (Simpson Range suite) against pre-Late Devonian metasedimentary footwall rocks (Snowcap assemblage). Field and microstructural analyses, including quartz c-axis fabric investigation, indicate...
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Series: GSA Field Guides
Published: 29 March 2018
DOI: 10.1130/2018.0050(08)
EISBN: 9780813756509
... ABSTRACT The eastern Great Smoky Mountains basement complex consists of the following components: (1) ca. 1350–1325 Ma orthogneiss and mafic xenoliths that represent some of the oldest crust in Appalachian Grenville massifs (similar to “pre-Grenville” basement components in the Adirondack...
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Journal Article
Journal: Geosphere
Published: 05 February 2018
Geosphere (2018) 14 (2): 835-860.
...-tectonic and post-tectonic intrusions and faulted against granitic orthogneiss. U-Pb zircon results show that (1) maximum depositional ages of paragneisses are Silurian to Early Devonian (432–390 Ma); (2) detrital zircons from quartzose calc-silicate paragneisses show a broad age peak from 1900 to 1000 Ma...
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