Rosaria Palmeri

Rosaria Palmeri
Università degli Studi di Siena | UNISI · Museo Nazionale dell'Antartide

About

69
Publications
6,936
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1,585
Citations
Citations since 2016
13 Research Items
498 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
Skills and Expertise
Additional affiliations
August 1997 - present
Università degli Studi di Siena
Education
November 1981 - November 1985

Publications

Publications (69)
Article
The recovery of melt inclusions (MI) in peritectic phases of metamorphic rocks demonstrates their anatectic origin even in the absence of other textural or field evidences, and gives the opportunity to retrieve the chemical composition of primary melts and infer melt entrapment conditions. Here we report the first recovery of such inclusions in a m...
Article
In the Pan-African belt of the Dronning Maud Land, Antarctica, crystallized melt inclusions (nanogranitoids) occur in garnet from ultramafic granulites. The granulites contain the peak assemblage pargasite+garnet+clinopyroxene with rare relict orthopyroxene and biotite, and retrograde symplectites at contacts between garnet and amphibole. Garnet co...
Article
Central Dronning Maud Land (DML; East Antarctica) is located in a key region of the Gondwana supercontinent. The Conradgebirge area (central DML) consists of orthogneisses, derived from both volcanic and plutonic protoliths, and minor metasedimentary rocks, intruded by Cambrian syn- to post-metamorphic plutons and dykes. Mafic-ultramafic boudins in...
Conference Paper
Full-text available
In the Pan-African belt of the Dronning Maud Land, crystallized melt inclusions (MI) occur in garnet from ultramafic granulites hosted in orthogneisses of the Conrad-gebirge. The granulites contain the peak assemblage Amp 1 +Grt+Cpx with rare relict Opx, and retrograde Pl+Spl+Opx+Amp 2 ±Ol±Bt symplectites at contacts between Grt and Amp 1. Garnet c...
Article
Full-text available
In January 1840, Dumont d'Urville's expedition landed along the coast of "Terre Adélie" and took three rock specimens, the first ever sampled on the Antarctic continent. The petrological and geochemical study of these samples, stored at the "Muséum national d'histoire naturelle", in Paris, characterizes them as migmatitic cordierite + microcline-be...
Article
Northern Victoria Land, Antarctica, plays a key role in any geodynamic reconstructions of the paleo-Pacific margin of Gondwana because it represents the along-strike continuation of Australia in Antarctica and hosts the only Paleozoic eclogites known along the Transantarctic Mountains. The architecture and evolution of the early Cambrian to Early O...
Conference Paper
Full-text available
In Antarctica, northern Victoria Land is a very suitable area for the study of the Ross Orogeny, as rocks and structures of this belt are well exposed. In northern Victoria Land, the boundary between the Wilson and the Bowers Terrane is known as the Lanterman-Mariner Suture zone. Such suture is characterised by a complex structural architecture: di...
Article
The survey of high-P metamorphic rocks in Antarctica can help clarify the geodynamic evolution of the continent by pointing out palaeo-suture zones and constraining the age of subduction and collision events. There are eclogite-facies rocks along the eastern margin of the ‘Mawson block’ (e.g., in the Nimrod Glacier region and George V Land). Some o...
Conference Paper
Full-text available
The Italian Museo Nazionale dell’Antartide (www.mna.it) was established as a consortium of three universities (Genova, Siena, Trieste) in 1996 with the aim to preserve, study, and increase the value of all material collected during the Italian Antarctic expeditions, as well as to promote public understanding of Antarctic science. All three sections...
Conference Paper
Il Museo Nazionale dell’Antartide nasce nel 1996 (decreto del Ministro dell'Università e della Ricerca Scientifica e Tecnologica) ed è articolato in tre sezioni con competenze scientifiche differenziate: biologico-ecologiche (sezione di Genova), geologico terrestre e glaciologiche (sezione di Siena) e geologico marine (sezione di Trieste). Il Museo...
Article
In northern Victoria Land (Antarctica) the Lanterman-Mariner suture separates the inboard Wilson Terrane from the outboard Bowers and Robertson Bay terranes. This boundary is characterized by the presence of discontinuous bodies of mafic to ultramafic rocks with a metamorphic grade ranging from medium-P amphibolite facies (Mountaineer Range) to ult...
Article
Full-text available
The Museo Nazionale dell’Antartide was established in 1996 and is comprehensive of three sections characterised by different scientific aims: biology and ecology (Genova section), Earth science (Siena section) and marine geology and Antarctic exploration (Trieste section). The Museum has the aim to preserve, study, and increase the value of all sci...
Chapter
Two anomalous metastable phases have been recently reported from ultrahigh-pressure metamorphic (UHPM) rocks: (i) α-quartz incipiently amorphized under pressure (IAUP quartz) found in eclogites from Antarctica (Palmeri et al., 2009) and (ii) lonsdaleite, a hexagonal polytype of sp3-bonded carbon, observed in diamond-bearing gneiss from the Kokcheta...
Article
Full-text available
Cordierite-bearing lavas (CBL;~105ka) erupted from the Mt. S. Angelo volcano at Lipari (Aeolian arc, Italy) are high-K andesites, displaying a range in the geochemical and isotopic compositions that reflect heterogeneity in the source and/or processes. CBL consist of megacrysts of Ca-plagioclase and clinopyroxene, euhedral crystals of cordierite an...
Article
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 (includi...
Conference Paper
Full-text available
The Italian Museo Nazionale dell’Antartide was established in 1996 with the aim to preserve, study, and increase the value of all the scientific materials collected during the Italian Research expeditions in Antarctica. The Earth Science section of the museum (University of Siena) holds a permanent exhibition to promote the knowledge of the Antarct...
Conference Paper
Full-text available
Pressure-induced amorphization (PIA) in the solid state (i.e., without melting) is a well-known process that has been experimentally observed for several materials and minerals1-2, including alpha-quartz1-4. Apart from meteorite impacts5, it has been predicted as irrelevant under natural P-T conditions because it can develop only under high pressur...
Article
Full-text available
Monocrystalline quartz inclusions in garnet and omphacite from various eclogite samples from the Lanterman Range (Northern Victoria Land, Antarctica) have been investigated by cathodoluminescence (CL), Raman spectroscopy and imaging, and in situ X-ray (XR) microdiffraction using the synchrotron. A few inclusions, with a clear-to-opalescent lustre,...
Article
Eclogite facies rocks along the Paleozoic active margin of Gondwana are rare. They are limited to isolated segments of Northern Victoria Land (Antarctica), western Tasmania, and southeastern Australia. New petrological data for mafic rocks and their host garnet-kyanite schists from the Franklin Metamorphic Complex (western Tasmania) permit reconstr...
Conference Paper
Full-text available
In northern Victoria Land, at the Pacific end of the Transantarctic Mountains, a major suture zone separates the inboard Wilson Terrane, characterized by low- to high-grade metamorphism, from two low-grade outboard terranes, the Bowers and the Robertson Bay Terranes (Weaver et al., 1984). This boundary, a complex fault zone, runs more than 400 km f...
Conference Paper
Full-text available
New geological, petromagnetic and petrological information on basement rock units of the Ross Orogen in Southern Victoria Land are compiled together with literature data in a new geopetrographic map integrating and refining the published maps that covered only partially the region. In the Byrd Glacier area (Britannia Range), the map is based on the...
Article
Full-text available
The Selborne Group comprises two metamorphic rock units, the muscoviteAEdolomite bearing Madison Marble and the biotite-muscoviteAEquartz-calcite Contortion Schist, which contains thick lenses of variably deformed metabasalts and metaconglomerates. Petrological and structural data indicate a polyphase metamorphic evolution including: i) an early st...
Article
Mylonitic granites from two shear zones in northern Victoria Land (Antarctica) were investigated in order to examine the behaviour of the U–Th–Pb system in zircon and monazite and of the 40Ar–39Ar system in micas during ductile deformation. Meso- and micro-structural data indicate that shear zones gently dip to the NE and SW, have an opposite sense...
Article
The Lanterman Fault Zone, a major terrane boundary in northern Victoria Land, displays a polyphase structural evolution. After west-over-east thrusting, it experienced sinistral strike-slip shearing. Sheared metabasites from the Wilson Terrane (inboard terrane) preserve a record of retrograde metamorphic evolution. Shearing took place under amphibo...
Article
Northern Victoria Land is a key area for the Ross Orogen - a Palaeozoic foldbelt formed at the palaeo-Pacific margin of Gondwana. A narrow and discontinuous high- to ultrahigh-pressure (UHP) belt, consisting of mafic and ultramafic rocks (including garnet-bearing types) within a metasedimentary sequence of gneisses and quartzites, is exposed at the...
Article
Full-text available
The Selborne Group comprises two metamorphic rock units, the muscoviteAEdolomite bearing Madison Marble and the biotite-muscoviteAEquartz-calcite Contortion Schist, which contains thick lenses of variably deformed metabasalts and metaconglomerates. Petrological and structural data indicate a polyphase metamorphic evolution including: i) an early st...
Article
The main focus of this paper is on the petrological evolution of medium- to high-grade metamorphic units in the Wilson Terrane, the westernmost lithotectonic unit of the Ross Orogen in northern Victoria Land. The petrological data set is reviewed for all areas where P-T-t paths have been reconstructed and geochronological data are sufficiently comp...
Article
Full-text available
The basement of NE Sardinia consists of magmatic-sedimentary sequences affected by a polyphase deformation (D1, D2, D3 and D4-,) and an increase in the metamorphic grade northwards, toward the inner zone of belt. Dj is mainly detected in the low-grade zone, while D2 is widespread in the basement but partitioned into domains with prevailing folding...
Article
SHRIMP (Sensitive High-Resolution Ion Microprobe) U-Pb ages of zircons from a single sample of mafic eclogite (Punta de li Tulchi, Sardinia, Italy) are reported. The study under cathodoluminescence (CL) reveals two groups of metamorphic zircons and the SHRIMP analyses allow recognition of three ages: 1) 453 ± 14 Ma; 2) 400 ± 10 Ma, and 3) 327 ± 7 M...
Data
Full-text available
The basement of Sardinia represents a nearly complete section of a segment of the Variscan belt that experienced a polyphase tectono-metamorphic evolution and Barrovian metamorphism. This basement is well suited to investigate the relationship between tectono-metamorphic evolution and argon isotope records in white mica. Micaschists from the garnet...
Article
Full-text available
Quartz pseudomorphs after possible retrogression of coesite were recognized petrographically within garnets of mafic eclogites from the Lanterman Range (Antarctica). In one of the quartz pseudomorphs the presence of a pristine coesite is indicated by in situ Raman microprobe spectroscopy. The results of the Raman analyses show that the quartz inclu...
Article
Mesostructural and microstructural relations between eclogitic boudins and country gneisses in the Ross Orogen of the Lanterman Range (Northern Victoria Land, Antarctica) are in some areas characterized by interlayering with sharp contacts on a cm scale, which indicate that the two rock-types underwent a common metamorphic evolution. Contrary to ma...
Article
A key area for the construction of a geodynamic model for the Ross Orogeny in northern Victoria Land is the boundary zone between the Wilson and Bowers terranes, along with the Bowers terrane itself. These areas are characterized by the occurrence of an abundance of mafic volcanic and plutonic rocks (locally with variable metamorphic overprint) tha...
Article
A transpressive crustal-scale dextral shear zone is documented in the Variscan Basement of northeastern Sardinia. It indicates the presence of a shear deformation parallel to the belt overprinting previous D1 structures related to nappe stacking and top-to-the-S and -SW thrusting. The L2 stretching lineation points to an orogen-parallel stretching...
Article
The basement of Sardinia represents a nearly complete section of a segment of the Variscan belt that experienced a polyphase tectono-metamorphic evolution and Barrovian metamorphism. This basement is well suited to investigate the relationship between tectono-metamorphic evolution and argon isotope records in white mica. Micaschists from the garnet...
Article
K–Ar ages from white mica are commonly interpreted to record cooling below a certain temperature with the implicit assumption that all the requirements of the volume diffusion theory are fulfilled. Nevertheless, studies on metamorphic white micas have highlighted discrepancies with previously inferred closure temperatures and have evidenced a close...
Article
Mafic eclogites sampled from a restricted area in the Lanterman Range (Antarctica) retrogressed variably under amphibolite facies metamorphism. Assemblages range from well-preserved eclogite, with minor growth of Na-Ca amphibole, to strongly retrogressed ones with extensive development of Ca amphibole. 40Ar-39Ar furnace step-heating experiments on...
Article
Eclogitic rocks are hosted within gneisses and migmatites of the Hercynian basement of NE Sardinia. They are characterized by two compositional layers: garnet-pyroxene rich-layers and amphibole-plagioclase layers. The former contain structural, mineralogical and compositional relics of eclogite facies re-equilibration. Four stages of evolution have...
Article
Full-text available
New field data from the Lanterman Range - Mountaineer Range region suggest that the easternmost portion of the Wilson Terrane is composite, including four major metamorphic complexes, each of them characterized by distinct lithological assemblages and metamorphic patterns. These data, in conjuction with available geochronological constraints, suppo...
Article
Migmatites exposed in the Deep Freeze Range, northern Victoria Land, Antarctica contain the mineral assemblage biotite + quartz + plagioclase + K-feldspar ± garnet ± cordierite ± sillimanite in mesosomes, with concordant and discordant leucosomes. Partial melting is considered the main migmatite-forming process at approximately 700–750 °C and 4–5 k...
Article
Full-text available
Well-preserved eclogites were found for the first time in Antarctica, at the Lanterman Range, northern Victoria Land. They are part of a mafic-ultramafic belt that lies between the Wilson Terrane, representing part of the palaeo-Pacific margin of Gondwana, and the Bowers Terrane, a Cambro-Ordovician volcanic arc and related sediments, accreted to t...
Article
Full-text available
The mafic eclogites of the Lanterman Range are the first record of mineral ages. The inferred P–T path, the microtextural features a well-preserved high-pressure assemblage from the Pacific end of and the overlap of the Sm–Nd garnet ages with the range of the the Transantarctic Mountains. They occur among pods and lenses 238 U– 206 Pb rutile–whole-...
Article
Mafic dykes cutting the gneisses and migmatites in the Deep Freeze Range high-grade metamorphic complex of northern Victoria Land, Antarctica, have undergone strong recrystallization and deformation during amphibolite-facies metamorphism. Metamorphic mobility mostly affected the large-ion lithophile elements (LILE). Rare Earth (RE) and the high fie...
Article
Full-text available
ABSTRACT The metasedimentary sequence of the Deep Freeze Range (northern Victoria Land, Antarctica) experienced high-T/low-F metamorphism during the Cambro-Ordovician Ross orogeny. The reaction Bt + Sil + Qtz = Grt + Crd + Kfs + melt was responsible for the formation of migmatites. Peak conditions were c. 700–750° C, c. 3.5–5 kbar and xH2Oc. 0.5)....

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Projects

Projects (2)
Archived project
Between history and geology, study of the first rocks sampled in Terre Adelie by a french expedition in 1840