Ultra-high-pressure metamorphism in felsic rocks: the garnet-phengite gneisses and quarzites from the Lanterman Range, Antarctica

Palmeri, Rosaria; Ghiribelli, Barbara; Talarico, F.; Ricci, C

doi:10.1127/0935-1221/2003/0015-0513

Cited by 49 publications

(55 citation statements)

References 36 publications

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“…Several data supporting 2M 1 formation during decompression and heating, as hypothesized by Sassi et al (1994), have been published in the recent literature (Ivaldi et al 2001;Di Vincenzo et al 2001;Palmeri et al 2003;Ferraris et al 2005), which is consistent with the early results by Frey et al (1983).…”

Section: Introduction and State Of Artsupporting

confidence: 83%

What drives the distribution in nature of 3T vs. 2M1 polytype in muscovites and phengites? A general assessment based on new data from metamorphic and igneous granitoid rocks

Sassi

Brigatti

Gómez-Pugnaire

et al. 2010

American Mineralogist

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Petrol., chem., and polytype data are presented for dioctahedral potassic micas from K-feldspar-bearing metamorphic and igneous rocks of acidic compn. unaffected by high-pressure (HP) conditions. The paper aims to demonstrate that: (1) under non-HP conditions, in both metamorphic and igneous plutonic environments, a given bulk-rock compositional constraint imposes a more or less marked phengitic compn. to dioctahedral potassic mica; and (2) this muscovite crystallizes as 2M1, notwithstanding its phengitic compn. The samples (157 in no.) are from widespread provenances. We conclude that the growth of 3T polytype of muscovite is not a function of mica compn. This is consistent with the recent crystallog. knowledge on polytypism, cation ordering, elastic properties, and structural deformational mechanisms of muscovite, which address the stabilization of 3T with pressure

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Section: Introduction and State Of Artsupporting

confidence: 83%

What drives the distribution in nature of 3T vs. 2M1 polytype in muscovites and phengites? A general assessment based on new data from metamorphic and igneous granitoid rocks

Sassi

Brigatti

Gómez-Pugnaire

et al. 2010

American Mineralogist

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“…Some less-foliated eclogites have inclusions of coesite and coesite pseudomorphs in garnet (Ghiribelli et al, 2002) and were subjected to UHP metamorphism at >850°C and >2.9 GPa, followed by an amphibolite-facies overprint. Palmeri et al (2003Palmeri et al ( , 2007 described prograde, peak and retrograde assemblages of felsic gneiss and mantle-derived garnet peridotites interlayered with coesitebearing eclogite, and documented in situ UHP metamorphism for these rocks: the felsic gneiss garnets contain inclusions of coesite pseudomorphs, and the garnet peridotite mineralogy suggests estimated P-T conditions of 3.2-3.3 GPa and 764-820°C. The UHP event was dated by Grt-Omp-whole rock Sm-Nd and zircon 238 U-206 Pb ages at 500 Ma, and the 40 Ar-39 Ar ages of Ca-amphibole at 490-486 Ma for the amphibolite-facies overprint.…”

Section: Coesite-bearing and New Uhp Terranesmentioning

confidence: 98%

Ultrahigh-pressure minerals and metamorphic terranes – The view from China

Liou

Ernst

Zhang

et al. 2009

Journal of Asian Earth Sciences

323

161

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“…The Hbl-In curve is after Plyusnina (1982). P-T boxes for mafic, felsic and ultramafic rocks and the prograde path (green dashed arrow) for felsic rocks is from Di Vincenzo et al (1997), Palmeri et al (2003), Palmeri et al (2007). This figure is available in colour online at wileyonlinelibrary.com/journal/gj structural data about the common UHP metamorphism and their exhumation as a coherent tectonic slice.…”

Section: P-t Paths and Geodynamic Implicationsmentioning

confidence: 99%

Ultrahigh‐pressure metamorphism at the Lanterman Range (northern Victoria Land, Antarctica)

2011

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Northern Victoria Land is a key area for the Ross Orogen-a Palaeozoic fold belt formed at the palaeo-Pacific margin of Gondwana and also known as the Delamerian and Tyennan Orogeny in southern Australia, and Tasmania, respectively. A narrow and discontinuous high-to ultrahigh-pressure (HP/UHP) belt, consisting of mafic and ultramafic rocks (including garnet-bearing types) within a metasedimentary sequence of gneisses and quartzites, is exposed at the Lanterman Range (northern Victoria Land), at the boundary between two main lithotectonic terranes (the Wilson and Bowers terranes). Mesostructural and microstructural relations between eclogitic boudins and country gneisses are, in some areas, characterized by interlayering with sharp contacts on a cm scale. Geological, petrological and geochronological studies indicate that mafic, ultramafic and felsic host rocks underwent a common metamorphic evolution with an UHP eclogite-facies stage % 500 Ma ago at temperatures of up to % 8508C and pressures up to 3.3 GPa. The retrograde P-T path is similar and, indeed, it overlaps in every lithology; it is a nearly isothermal path from UHP conditions up to deep crustal levels, and becomes a cooling-unloading path from intermediate to shallow levels. The discovery of UHP rocks at the Lanterman Range yields eclogite-facies rocks of this area among the rare UHP rocks of the world and represents the only known locality in Antarctica and along the entire palaeo-Pacific margin of Gondwana during the Ross-Delamerian-Tyennan Orogen.

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Ultra-high-pressure metamorphism in felsic rocks: the garnet-phengite gneisses and quarzites from the Lanterman Range, Antarctica

Cited by 49 publications

References 36 publications

What drives the distribution in nature of 3T vs. 2M1 polytype in muscovites and phengites? A general assessment based on new data from metamorphic and igneous granitoid rocks

What drives the distribution in nature of 3T vs. 2M1 polytype in muscovites and phengites? A general assessment based on new data from metamorphic and igneous granitoid rocks

Ultrahigh-pressure minerals and metamorphic terranes – The view from China

Ultrahigh‐pressure metamorphism at the Lanterman Range (northern Victoria Land, Antarctica)

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