MESSIGA, B., SCAMBELLURI, M. (1991) Retrograde P-T-t path for the Voltri Massif eclogites (Ligurian Alps, Italy): some tectonic implications. Journal of Metamorphic Geology, 9 (1) 93-109 doi:10.1111/j.1525-1314.1991.tb00506.x

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	MESSIGA, B., SCAMBELLURI, M. (1991) Retrograde P-T-t path for the Voltri Massif eclogites (Ligurian Alps, Italy): some tectonic implications. Journal of Metamorphic Geology, 9 (1) 93-109 doi:10.1111/j.1525-1314.1991.tb00506.x	Journal (article/letter/editorial)
	Retrograde P-T-t path for the Voltri Massif eclogites (Ligurian Alps, Italy): some tectonic implications...Pavia, Italy M. SCAMBELLURI Dipartimento di Scienze della Terra, Cso Europa 26, 16132 Cenova, Italy A B...by atoll garnets; (3) albite-amphibolite stage-barroisite/katophorite + albite epidote oxides f chlorite...different from those defined in the literature for the Voltri eclogites. The main features inferred from the...temperature. The complexity of the P-T path drawn for the Voltri eclogites can be explained with a mechanism of
	*Mottana, A., Bocohio, R. (1975) Superferric eclogites of the Voltri Group (Pennidic Belt, Apennines) Contributions to Mineralogy and Petrology, 49 (3) 201-210 doi:10.1007/bf00376588*	Journal (article/letter/editorial)
	Springer-Verlag 1975 Superferric Eclogites of the Voltri Group (Pennidic Belt, Apennines) A. Mottana and...Eclogites interlayered with serpentinites of the Voltri Group show a distinctive chemical composition,...and titanium enrichment. The hypothesis that the Voltri Group maficultramafie association formed as a part...up to 1 km long, within the serpentinites of the Voltri Group, the portion of the Pennidie Belt of the...Alps outcropping in the Apenaine Range west of Genoa. They are particularly common in the Vara valley
	Bocchio, R., Mottana, A. (1975) Trace-element abundances of iron-rich eclogites, with implications on the geodynamical evolution of the Voltri Group (Pennidic Belt) Chemical Geology, 15 (4) 273-283 doi:10.1016/0009-2541(75)90037-6	Journal (article/letter/editorial)
	IMPLICATIONS ON THE GEODYNAMICAL EVOLUTION OF THE VOLTRI GROUP (PENNIDIC BELT) R. BOCCHIO and A. MOTTANA...Mineralogia, Universit~ degli Studi di Milano, Milano (Italy) (Received December 19, 1974; revised version accepted...implications on the geodynamical evolution of the Voltri Group (Pennidic Belt). Chem. Geol., 15: 273--283...Ti (28,540 ppm)-rich eclogites contained in the Voltri serpentinites show contents of metallic trace elements...type and those included in ultramafic rocks. The Voltri eclogites are enriched in Mn (1,894 ppm), V (610
	VIGNAROLI, G., ROSSETTI, F., BOUYBAOUENE, M., MASSONNE, H.-J., THEYE, T., FACCENNA, C., FUNICIELLO, R. (2005) A counter-clockwise P-T path for the Voltri Massif eclogites (Ligurian Alps, Italy) Journal of Metamorphic Geology, 23 (7) 533-555 doi:10.1111/j.1525-1314.2005.00592.x	Journal (article/letter/editorial)
	counter-clockwise P–T path for the Voltri Massif eclogites (Ligurian Alps, Italy) G. VIGNAROLI1, F. ROSSETTI1...Roma Tre, Largo S.L. Murialdo 1, 00146 – Rome, Italy (vignarol@geo.uniroma3.it) 2 Département Géologie...investigations of eclogites from the eclogite zone of the Voltri Massif (Ligurian Alps) have been used to reconstruct...geothermobarometry; rock exhumation; structural fabric; Voltri Massif. INTRODUCTION Eclogite facies rocks are...embedded in serpentinite matrix of the Voltri Massif (Ligurian Alps, Italy). The results provide the ﬁrst evidence
	Ernst, W. G. (1979) Coexisting sodic and calcic amphiboles from high-pressure metamorphic belts and the stability of barroisitic amphibole. Mineralogical Magazine, 43 (326) 269-278 doi:10.1180/minmag.1979.043.326.09	Journal (article/letter/editorial)
	W. California, Valtournanche (W. Alps), and W. Liguria are compared. Chemical contrasts among coexisting...typically did not grow at the same time as the barroisite. Ti, Mn, and K appear to be concentrated in calcic...respectively, whereas those from Valtournache and W. Liguria show evidence of decompression recrystallization...California, U S A : Valtournanche, W. Alps; and W. Liguria, Italy. Prograde and retrograde metamorphic parageneses...Ernst (~977); the retrograde paragenesis in W. Liguria was also described. * Institute of Geophysics
	*Ernst, W. G. (1981) Petrogenesis of eclogites and peridotites from the Western and Ligurian Alps. American Mineralogist, 66 (5-6) 443-472*	Journal (article/letter/editorial)
	-15 kbar Lanzo l000oC <12 kbar w. Liguria I100'C -15 kbar e. Liguria l000oC <12 kbar Eclogites(none) ...kbar Z,ermatt <600"C (l0kbar) <600"C (l0kbar) w. Liguria Eclogites Alpe Arami 900"C (40kbar) Zeffiatt 525"C...parageneses characteristicof that produced in western Liguria and the Alps. Perhapsthe Sestri-VoltaggioLine is...the more recent 70o counterclockwiserotation of Italy (Lowrie and Alvarez, 1975).In summary,postHercynian...partial melting effects are thought to characterize Liguria, Lanzo and Finero occurrences(Bezzi and Piccardo
	Morten, Lauro, Bocchio, Rosangela, Mottana, Annibale (1985) Transformation of a superferrian eclogite within serpentinite: A case study from the Voltri Group, Italy. Chemical Geology, 50 (1) 111-127 doi:10.1016/0009-2541(85)90115-9	Journal (article/letter/editorial)
	WITHIN SERPENTINITE: A CASE STUDY FROM THE VOLTRI GROUR ITALY LAURO MORTEN 1, ROSANGELA BOCCHIO 2 and...Petrografia, Universitd di Bologna, 4 0 1 2 7 Bologna (Italy) 2 Dipartimento di Scienze Della Terra, Sezione...Milano (Italy) 3 Istituto di Mineralogia e Petrografia, Universitd di R o m a , 00185 R o m e (Italy) (Accepted...within serpentinite: A case study from the Voltri Group, Italy. In: D.C. Smith, G. Franz and D. Gebauer... Furthermore, 2. Statement of the problem The Voltri Group ophiolitic complex contains several "classical"
	Nicollet, Christian (1989) L'eclogite de Faratsiho (Madagascar): un cas exceptionnel de métamorphisme de haute-P-basse-T au Protérozoïque supérieur. Precambrian Research, 45 (4) 343-352 doi:10.1016/0301-9268(89)90069-7	Journal (article/letter/editorial)
	et sont parfois frang~s d'un mince liser~ de barroisite. Cette derni~re, ~galement interstitielledans...centrale du grenat tandis que des inclusions de barroisite et d'omphacite se localisentdans la moitid externe...~quilibre avec la paragen~se $clogitique; une barroisite (III) bleu-vert, peu abondante et interstitielle;de...~quilibre avec la paragen~se ~clogitique; (5) barroisite (III) interstitieUe; (6) hornblende actinolitique...with the eclogite paragenesis; (5) interstitial barroisite (III); (6) actinolitic hornblende (IV); and (7)
	FORBES, R. B., EVANS, B. W., THURSTON, S. P. (1984) Regional progressive high-pressure metamorphism, Seward Peninsula, Alaska. Journal of Metamorphic Geology, 2 (1) 43-54 doi:10.1111/j.1525-1314.1984.tb00284.x	Journal (article/letter/editorial)
	uplift probably corresponded to the growth of barroisite rims on earlier sodic and actinohtic amphiboles...accompanying amphibole is sodic actinolite and barroisite. The west-to-east change across the Nome River...almandine glaucophane sodic actinolite, locally barroisite), and that the rocks containing albite-epidoteamphibolite...+apatite f actinolite (zoned to Na actinolite and barroisite) paragonite & chlorite f phengite & albite t...and thermal relaxation in the albite-epidote<barroisite) amphibolite facies. Retrograde alteration, during
	Boven, A (1999) Timing of exhumation of a high-pressure mafic granulite terrane of the Paleoproterozoic Ubende belt (West Tanzania) Precambrian Research, 93 (1) 119-137 doi:10.1016/s0301-9268(98)00101-6	Journal (article/letter/editorial)
	are amphibolites (mafic tectonites), for which barroisite constitutes a P–T marker. Near the southwestern...boundary of the NW–SE oriented mafic terranes, these barroisite-bearing tectonites display a pronounced extensional...Ar–Ar stepwise heating analyses on different barroisite separates from this mafic tectonite have yielded...and kinematics of the presently investigated barroisite-bearing mafic tectonite are compared with the...Paleoproterozoic evolution of the Ubende belt. Barroisite, a low-K amphibole, is a common mineral formed
	Gao, , Klemd, , Zhang, , Wang, , Xiao, (1999) P-T path of high-pressure/low-temperature rocks and tectonic implications in the western Tianshan Mountains, NW China. Journal of Metamorphic Geology, 17 (6) 621-636 doi:10.1046/j.1525-1314.1999.00219.x	Journal (article/letter/editorial)
	whereas the sodic–calcic amphiboles mainly comprise barroisite and winchite. The jadeite content of omphacite...Abbreviations follow Kretz (1983), except: Bar, barroisite; Cpx, clinopyroxene; Cro, crossite; Ed-hbl, edenitic...in varying modal proportions are clinozoisite, barroisite, sodic amphibole, phengite, paragonite and quartz...calcite inclusions (Fig. 4C). Sodic amphibole and barroisite contain a few omphacite relics indicating a relatively...Determined by visual estimates. ** Hornblende: barroisite, winchite, edenite, edenitic hornblende or ferro-pargastitic
	Rebay, G., Powell, R. (2002) The formation of eclogite facies metatroctolites and a general petrogenetic grid in Na2O-CaO-FeO-MgO-Al2O3-SiO2-H2O (NCFMASH) Journal of Metamorphic Geology, 20 (9) 813-826 doi:10.1046/j.1525-1314.2002.00409.x	Journal (article/letter/editorial)
	Universita di Pavia, Via Ferrata, 1, I-27100, Pavia, Italy (rebay@crystal.unipv.it) 2 School of Earth Sciences...metatroctolites from a variety of Western Alps localities (Voltri, Monviso, Lanzo, Allalin, Zermat–Saas, etc.) that...hornblende in Carson et al. (1999) does allow the barroisite-bearing eclogite assemblages found in the New...gl ¼ glaucophane, hb ¼ hornblende (including barroisite, etc.), and o ¼ omphacite. The reactions for...that preserve relics of pre-eclogitic assemblages (Voltri, Allalin, Valtournanche). Notwithstanding the complexities
	Beurlen, H., Da Silva Filho, A.F., Guimarães, I.P., Brito, S.B. (1992) Proterozoic c-type eclogites hosting unusual TiFe±Cr±Cu mineralization in northeastern Brazil. Precambrian Research, 58 (1) 195-214 doi:10.1016/0301-9268(92)90119-9	Journal (article/letter/editorial)
	Bodooco STAGES Igneous M Garnet Hornblende Barroisite Omphacite(P-2) Zoisite Phengite Rutile Apatite...to that observed by Ernst ( 1976 ) in the Voltri Group, Italy. Mineralized rock types Two types of massive...Eclogites and related rocks from the Voltri Group, Western Liguria, Italy. Schweiz. Miner. Petrogr. Mitt....developed in magnesian metagabbros, Voltri Group, Western Liguria, Italy. Contr. Mineral. Petrol., 83:1-15
	LARDEAUX, J. M., SPALLA, M. I. (1991) From granulites to eclogites in the Sesia zone (Italian Western Alps): a record of the opening and closure of the Piedmont ocean. Journal of Metamorphic Geology, 9 (1) 35-59 doi:10.1111/j.1525-1314.1991.tb00503.x	Journal (article/letter/editorial)
	Studi di Milano, Via Botticelli 23, 20733 Milano, Italy ABSTRACT The Sesia zone (Italian Western Alps)...assemblage consists of garnet, clinopyroxene, barroisite and/or glaucophane randomly developed as large...is: clinopyroxene + garnet I1 + glaucophane + barroisite + zoisite + phengite + rutile. (7) Acid granulites...Cumm after Mueller (1973). Stability fields of barroisite (Ba), actinolite (Ac) and hornblende (Hb) after...metamorphism: an example from the Ivrea-Verbano zone (Italy). Rendiconti della Societri Italiana di Mineralogia
	Zaw Win Ko, , Enami, M., Aoya, M. (2005) Chloritoid and barroisite-bearing pelitic schists from the eclogite unit in the Besshi district, Sanbagawa metamorphic belt. Lithos, 81 (1) 79-100 doi:10.1016/j.lithos.2004.09.018	Journal (article/letter/editorial)
	www.elsevier.com/locate/lithos Chloritoid and barroisite-bearing pelitic schists from the eclogite unit...eclogite and noneclogite units. Chloritoid and barroisite-bearing pelitic schists occur as interlayers...matrix phases of the schists are garnet, chlorite, barroisite, paragonite, phengite, and quartz. Eclogite facies...estimated using equilibria among chloritoid, barroisite, chlorite, interlayered chlorite–talc, paragonite...Eclogite; Pelitic schist; P–T trajectory; Chloritoid; Barroisite * Corresponding author. Tel./fax: +81 52 789
	(1989) Structural and metamorphic history of a segment of the Sesia-Lanzo zone, and its bearing on the kinematics of Alpine deformation in the western Alps. Special Publication, 45. Geological Society of London. 189-201 doi:10.1144/gsl.sp.1989.045.01.10	Report (chapter)
	Insubric line; SLZ, Sesia-Lanzo zone; SV, Sestri-Voltri line. (1977) maps and describes a further unit...mylonitic rocks along the contact is typically barroisite/glaucophane-epidotegarnet-sphene. The microfabric...rock compositions. The presence of hornblende-barroisite rather than actinolite in metabasites implies...mm. For localities of (b-d), see Fig. 4. (a) Barroisite-clinozoisite-garnet metabasite from a shear zone...foliated matrix of epidote and barroisite, and shows recrystallisation to barroisite along its margins. A garnet
	*Goffé, B., Schwartz, S., Lardeaux, J. M., Bousquet, R. (2004) Western and Ligurian Alps. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 149.*	Journal (article/letter/editorial)
	– paragonite – sudoite (Antoroto metabauxite, Liguria) – gahnite – euclase (Western Vanoise) • • •...amphiboles are progressively replaced by calco-sodic (barroisite) and sodic amphiboles (glaucophane), sometimes...coesite-bearing rocks in the Dora-Maira massif (western Alps, Italy). - Geology 20, 947-950. AVIGAD, D. N., CHOPIN,...blocks from a tectonic melange in the Voltri Massif, Ligurian Alps, Italy. - Ofioliti, 27, 1, 1-16. BROUWER...high-pressure metagabbros from Monviso (Cottian Alps), Italy. - Min. Mag., 51, Part 5, 681-687, illus. incl.
	(2004) Shear zones and metamorphic signature of subducted continental crust as tracers of the evolution of the Corsica/Northern Apennine orogenic system. Special Publication, 224. Geological Society of London. 321-335 doi:10.1144/gsl.sp.2004.224.01.20	Report (chapter)
	Universitd di Pisa, Via S. Maria 53, 1-56126 Pisa, Italy (e-maik gmolli@dst, unipi, it) 2CNR Istituto di...Geoscienze e Georisorse, Via G. Moruzzi, 1-56124 Pisa, Italy 3Dipartimento di Scienze della Terra, Universitft...Universitft di Pavia, Via Ferrata 1, 1-27100 Pavia, Italy (e-mail: tribuzio@crystal, unipv.it) 4CNR Istituto di...Sezione di Pavia, Via Ferrata 1, 1-27100 Pavia, Italy Abstract: This paper focuses on new data concerning...of the western Alps, ] ~/ '" W e s t e r n Liguria and ' ", Ligurian units "" \ " . ' . : ~
	El-Shazly, A.K, Sisson, V.B (1999) Retrograde evolution of eclogite facies rocks from NE Oman: evidence from fluid inclusions and petrological data. Chemical Geology, 154 (1) 193-223 doi:10.1016/s0009-2541(98)00132-6	Journal (article/letter/editorial)
	actinolite; Ank: ankerite; Aug: augite; Bar: barroisite; Bt: biotite; Cc: calcite; Chl: chlorite; Cpx:...acmite-rich clinopyroxeneq albite, or fibrous barroisite or winchiteq albite " magnetite ŽFig. 2a and...Morteani, 1980. and in retrograded eclogites in the Voltri massif, western Carpathians ŽVallis and Scambelluri...Selverstone et al., 1992; eclogitic metagabbros of the Voltri massif, Scambelluri, 1992; Vallis and Scambelluri...fluid inclusions in eclogitic metagabbros from the Voltri massif and pelitic metasediments from SW Tauern
	Ernst, W. G., Liu, Jun (1998) Experimental phase-equilibrium study of Al- and Ti-contents of calcic amphibole in MORB; a semiquantitative thermobarometer. American Mineralogist, 83 (9) 952-969 doi:10.2138/am-1998-9-1004	Journal (article/letter/editorial)
	to calcic, Si-poor at high temperatures:it is barroisite at 650 "C, edenite at 700 'C, and pargasite at...00;0.50< NaB< 1.50 (Na+K)a< 0.50;(Ca+Na)B 1.0 barroisite winchite + N )taa o l! + g Legend x 650'c...in composition from the sodic-calcic variety barroisite at 650 'C, 2.2 GPa, to Ca-amphiboleat T > 700...CentralShikoku: z o n el l l zone l-ll boundary Gruppodi Voltri,W Liguria: hornblendes actinolites CentralMountainRange...related rocks from the University, Voltri Group, WesternLiguria, Italy SchweizerischesMineralogisches Liu
	*Molina, J. F., Poli, S. (1998) Singular Equilibria in Paragonite Blueschists, Amphibolites and Eclogites. Journal of Petrology, 39 (7) 1325-1346 doi:10.1093/petroj/39.7.1325*	Journal (article/letter/editorial)
	UNIVERSITÀ DI MILANO, VIA BOTTICELLI 23, 20133 MILANO, ITALY RECEIVED JULY 20, 1997; REVISED TYPESCRIPT ACCEPTED...Università di Milano, Via Botticelli 23, 20133 Milano, Italy. Telephone: + 39 2 23698324. Fax: + 39 2 70638681...+ Pg Cz Q W Glaucophane-bearing assemblages Barroisite-bearing assemblages C Gro, Jd, Ab FOmph Hed...facies assemblage pargasite + albite ± epidote. Barroisite is overgrown by pargasitic amphibole, which coexists...+ Ep + Q + Ru + Sph (Gar–Bar–Ab assemblage). Barroisite is overgrown by magnesio-hornblende. Albite appears
	Bonnet, G., Agard, P., Angiboust, S., Monié, P., Jentzer, M., Omrani, J., Whitechurch, H., Fournier, M. (2018) Tectonic slicing and mixing processes along the subduction interface: The Sistan example (Eastern Iran) Lithos, 310. 269-287 doi:10.1016/j.lithos.2018.04.016	Journal (article/letter/editorial)
	around garnet, and blue-green amphibole (like barroisite or winchite) replacing omphacite in PT the...per formula unit - apfu) but mostly plot in the barroisite field. Preserved actinolite cores in blue amphibole...grade, with a common mineral assemblage involving barroisite - epidote - albite - titanite ± phengite ± sodic...e.g., Fig. 8a), (2) ages given by hornblende/barroisite in eclogite (that formed at or near the peak-T;...paths recorded in a tectonic melange (Voltri Massif, NW Italy): implications for the exhumation of HP
	John, Timm, Scherer, Erik E., Schenk, Volker, Herms, Petra, Halama, Ralf, Garbe-Schönberg, Dieter (2010) Subducted seamounts in an eclogite-facies ophiolite sequence: the Andean Raspas Complex, SW Ecuador. Contributions to Mineralogy and Petrology, 159 (2) 265-284 doi:10.1007/s00410-009-0427-0	Journal (article/letter/editorial)
	textures. Note the formation of glaucophane around barroisite and the occurrence of phengite and clinozoisite...antigorite. amph amphibole, ant antigorite, bar barroisite, chum titanium-clinohumite, czo clinozoisite...amphiboles are enriched in Na and K as compared to the barroisite, with (Na ? K)A ranges of 0.7–0.8 and 0.40– 0...can be classified as glaucophane (Table 1) and barroisite (nomenclature after Leake et al. 1997). Barrositic...and 0.21 and XFe values between 0.32 and 0.36. Barroisite, which generally has higher Al and Ca and lower
	El Korh, A., Schmidt, S.Th., Vennemann, T., Ballèvre, M. (2013) Trace element and isotopic fingerprints in HP–LT metamorphic rocks as a result of fluid–rock interactions (Ile de Groix, France) Gondwana Research, 23 (3) 880-900 doi:10.1016/j.gr.2012.07.014	Journal (article/letter/editorial)
	symplectites of barroisite + albite that rim omphacite; 2) overgrowths of barroisite and actinolite rims...greenschists consists of epidote, chlorite, actinolite, barroisite, albite, magnetite (partially resorbed by hematite)...Relicts of glaucophane grains with rims of barroisite or barroisite+ actinolite are locally present in greenschist...of matrix chlorite and magnetite, and rims of barroisite on grains of glaucophane and crossite. In the...been almost completely replaced by chlorite and barroisite. Banded rocks are often associated with HP epidote-rich
	Krogh, E.J. (1982) Metamorphic evolution of Norwegian country-rock eclogites, as deduced from mineral inclusions and compositional zoning in garnets. Lithos, 15 (4) 305-321 doi:10.1016/0024-4937(82)90021-4	Journal (article/letter/editorial)
	(1977) found the lower grade assemblage Fe-rich barroisite, epidote, chlorite, paragonite, phengite, albite...omphacite. Bryhni & Griffin (1971) assumed that the barroisite-carinthine inclusions in the garnets were relics...eclogi~tes and related rocks from the Voltri Group, western Liguria, Italy. Schweiz. Min. Pet. Mitt. 56, 293-343

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Barroisite from Voltri, Genoa, Genoa, Liguria, Italy

Barroisite from
Voltri, Genoa, Genoa, Liguria, Italy