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paragneiss

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Journal Article
Published: 01 July 2021
American Mineralogist (2021) 106 (7): 1172–1182.
...Graciela Sosa; Sebastián Oriolo; Alfons van den Kerkhof; Pablo Diego González; Ezequiel Olaizola; Florencia Bechis Abstract Quartz segregations in paragneisses from the Paleozoic basement of the North Patagonian Andes contain highly saline multiphase fluid inclusions with the rare daughter mineral...
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Journal Article
Journal: GSA Bulletin
Published: 22 April 2021
GSA Bulletin (2021)
... arc crust, and the contributions of these rocks to the evolution of arc crust remain unclear. In this paper, we conduct a systematic study of petrology, geochronology, and geochemistry of migmatitic paragneisses from the eastern Gangdese magmatic arc, southern Tibet. The results show...
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 08 February 2021
Lithosphere (2021) 2021 (1): 6697858.
... AD2a (S04) Altyn Darya — 329 ± 5 ID-TIMS age 329 ± 5 ID-TIMS age AD6c (S04) Altyn Darya — 329 ± 5 ID-TIMS age 329 ± 5 ID-TIMS age Kurguvad paragneiss RT15-11 Khingob valley 200.8 ± 1.8 ∗ — 576.19 ± 1.34 25 RT13-148...
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Journal Article
Published: 02 December 2020
Environmental and Engineering Geoscience (2021) 27 (1): 95–111.
... 2 and ranges in elevation from 1,394 to 2,945 m a.s.l. ( Figure 1b ). The Gadria is underlain by paragneiss and orthogneiss lithologies from the Permian and Cretaceous metamorphisms. Sediment produced by the weathering of these highly fractured rocks and thick Quaternary deposits fills the channel...
Journal Article
Journal: GSA Bulletin
Published: 01 December 2020
GSA Bulletin (2021) 133 (7-8): 1483–1504.
... in early Earth. The Paleoproterozoic Aketashitage orogenic belt is located at a key position in northwestern China and connects the North China craton, Tarim craton, Altaids orogen, and Tethys orogen. Garnet-bearing mafic and paragneissic granulite occur as interlayers or blocks preserved within...
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Journal Article
Journal: GSA Bulletin
Published: 07 October 2020
GSA Bulletin (2021) 133 (5-6): 1021–1038.
..., the oldest rocks of which contain granulite-facies mineral assemblages and all of which are deformed. Leucopegmatites that intrude pelitic paragneisses, which likely formed in response to high-grade metamorphism and which are all deformed, are 370–355 Ma in age. All metapelitic paragneisses contain...
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Journal Article
Published: 10 September 2020
Mineralogical Magazine (2020) 84 (5): 662–690.
... of >900°C. The last preserved stages of retrogression are recorded in paragneiss plagioclase–garnet, biotite–garnet and host rock ilmenite–magnetite pairs (≤3 kbar and ~380–560°C). The Amikoq Complex intruded a MORB-like crustal section and the former remained relatively undisturbed in terms of modal...
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Journal Article
Published: 28 July 2020
Canadian Journal of Earth Sciences (2021) 58 (1): 21–37.
... element patterns of garnet do not show chemical zoning ( Fig. 4A ), but a minor rim-ward decrease in Mg and minor rim-ward increase in Ca are observed ( Fig. 4A ). Sample BC04 is a dark, fine-grained, sillimanite-bearing garnet paragneiss that is composed mainly of biotite, quartz, and plagioclase...
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Series: GSA Field Guide
Published: 18 May 2020
DOI: 10.1130/2020.0059(02)
EISBN: 9780813756592
... on the east side of Frazier Mountain. Quartzite, metaconglomerate, and marble are rare constituents. The biotite gneiss has previously been interpreted as a paragneiss resulting from metamorphism of dominantly pelitic sediments and local interleaved volcanic beds ( Silver, 1971 ; Frizzell and Powell, 1982...
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Journal Article
Journal: GSA Bulletin
Published: 06 April 2020
GSA Bulletin (2020) 132 (11-12): 2415–2431.
..., quartzite, amphibolite, and magmatic veins. The protoliths of paragneisses from the Maxianshan Group were reported to have formed at 940 ± 30 Ma ( Wan et al., 2003 ). The Phanerozoic cover contains early Paleozoic volcano-sedimentary series, late Paleozoic to Triassic shallow marine to continental sediments...
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Journal Article
Published: 03 March 2020
Journal of the Geological Society (2020) 177 (4): 738–751.
... partitioning in partially molten rock remain poorly understood. We use field and microstructural observations to unravel the evolution of a partial melt shear zone, Seiland Igneous Province, northern Norway. The Øksfjord shear zone (ØSZ) is one of several paragneiss shear zones present within gabbros...
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Journal Article
Published: 01 February 2020
Italian Journal of Geosciences (2020) 139 (1): 131–148.
...Gabriele Cruciani; Marcello Franceschelli; Valeria Caironi; Giovanni Musumeci ABSTRACT Chemical analyses of garnet-bearing metasediments and EMP and U/Pb analyses of detrital zircons of the Lula paragneisses in the Axial Zone of the Variscan belt (NE Sardinia) give significant contribution...
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Journal Article
Journal: Economic Geology
Published: 01 December 2019
Economic Geology (2019) 114 (8): 1569–1598.
.... The majority of the deposits are hosted within sodically altered Lyon Mountain granite gneiss, although some deposits occur within paragneiss, gabbro, anorthosite, or potassically altered Lyon Mountain granite gneiss. The IOA deposits and the waste and/or tailings piles associated with them have potential...
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Journal Article
Published: 22 November 2019
Bulletin de la Société Géologique de France (2019) 190 (1): 12.
..., paragneisses, and amphibolites that include pre-anatectic relics of eclogites, high-pressure mafic granulites, ultramafites and calc-silicates ( Faure-Muret, 1955 ; Malaroda et al. , 1970 ; Blasi, 1971 ; Bortolami et al. , 1974 ; Bogdanoff and Ploquin, 1980 ; Bogdanoff, 1986 ; Latouche and Bogdanoff...
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Journal Article
Published: 19 November 2019
Canadian Journal of Earth Sciences (2020) 57 (7): 840–854.
..., respectively. Supracrustal paragneisses include meta-arkose derived from a continental sediment source of Laurentian affinity and metagraywacke and metapelite from an arc-like sediment source deposited in a back-arc basin, inboard of the Colonial Lake arc. The Assunpink Creek Granite was emplaced post...
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Journal Article
Published: 01 October 2019
Russ. Geol. Geophys. (2019) 60 (10): 1101–1118.
... of four metamorphic sequences: amphibolite–marble–paragneiss (volcanic–carbonate–terrigenous), amphibolite–orthogneiss (volcanic), marble–paragneiss (carbonate–terrigenous), and paragneiss (terrigenous). Study of the nature of the protoliths of metamorphic rocks shows that gneisses and schists...
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Journal Article
Journal: Geology
Published: 22 May 2019
Geology (2019) 47 (8): 715–718.
... to ultrahigh-pressure (UHP) metamorphic conditions during the Variscan orogeny. This unit is predominantly composed of ortho- and paragneisses with numerous lenses of eclogite and a few lenses of peridotite (e.g., Liati and Gebauer, 2009 ). It is exposed in the central Erzgebirge and has received considerable...
FIGURES
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 16 April 2019
Lithosphere (2019) 11 (4): 465–487.
... in deformation (e.g., DeCelles et al., 1998 ; Ojha et al., 2000 ; Lavé and Avouac, 2000 ). The GH section in northwestern Bhutan consists of ∼8 km of migmatitic, garnet- and sillimanite-bearing paragneiss, with interlayered schist, quartzite, and orthogneiss ( Gansser, 1983 ; Kellett et al., 2009...
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Journal Article
Published: 01 March 2019
Russ. Geol. Geophys. (2019) 60 (3): 287–308.
..., 2013 ); b , geological scheme of the area of Murzinka (I) and Adui (II) plutons, compiled after the Geological Map of the Urals (I.D. Sobolev (Ed.), 1966) with authors’ amendments. 1 , paragneisses and orthogneisses with marble interbeds, vein granites of the Yuzhakovo complex; 2 , Silurian–Devonian...
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