 | Jahn, B.M., Auvray, B., Cornichet, J., Bai, Y.L., Shen, Q.H., Liu, D.Y. (1987) 3.5 Ga old amphibolites from eastern Hebei Province, China: Field occurrence, petrography, Sm-Nd isochron age and REE geochemistry. Precambrian Research, 34 (3) 311-346 doi:10.1016/0301-9268(87)90006-4 | Journal (article/letter/editorial) | | geochemistry. Precambrian Res., 34: 311--346. Amphibolite blocks frequently occur in association with grey...were subsequently retrogressed to the present amphibolite facies mineral assemblages. The positive end...represented by highly metamorphosed and deformed amphibolite enclaves in late Archaean granitic rocks. The...ancient age for the contrasting rock types: amphibolite and quartz diorite. These points will be discussed...(granulite and upper amphibolite facies), and less than 10% belongs to lower grade amphibolite and greenschist |  | | Journal (article/letter/editorial) | | intermediate amphibolite............................................................... Coarse amphibolite.............................. Special textures in amphibolite................................................pre-Cambrian sedimentary rocks are small masses of amphibolite. These bodies, both here and in other parts of...amphibolites was mapped by plane table, and individual amphibolite bodies were studied in detail in the Homestake...to erosion has resulted in numerous prominent outcrops. The reader must be cautioned not to confuse these |  | | Journal (article/letter/editorial) | | nodules of probable stromatolitic origin in amphibolite from the Neoproterozoic terrain of southern Israel...ACT Several small bodies of massive to banded amphibolite occur within plagioclase-quartz-biotite hornblende...Israel. Entrapped within the amphibolite are nodules consisting mainly of calcite+talc, and rare banded marble...amphibolites is thus enigmatic. K EY WORDS : amphibolite, stromatolite, Neoproterozoic, Arabo-Nubian Shield...proposed. Geological setting The Neoproterozoic outcrops of southern Israel (totalling some 90 km2) occur |  | | Journal (article/letter/editorial) | | complex (Fig. 1). These supracrustals form extensive outcrops up to several hundred meters wide and several...prominent is a banded amphibolite accounting for more than half of the amphibolite outcrops. The banded amphibolites...folding and have been metamorphosed up to the amphibolite facies (Chadwick and Coe 1983). Isotopic evidence...indicating that tourmaline formed prior to the amphibolite-facies metamorphism (Appel 1985 b). The tourmaline...separated from each other by 5-10 m of banded amphibolite with very sparsely disseminated scheelite. The |  | | Report (chapter) | | several distinct NW-trending belts separated by amphibolite sheets. The most prominent belt comprises the...basite (amphibolite) sheet. Narrower bands of Kerrysdale-type semipelite occur within the amphibolite in the...and less wellexposed outcrops compared with the adjoining rugged amphibolite outcrops, which tend to form...in small amounts in some samples, and epidote, calcite and opaque ores (typically pyrite), occur in minor...containing appreciable quantities of muscovite and calcite, whereas in the main part of the outcrop, these |  | | Journal (article/letter/editorial) | | 2000). The Group is metamorphosed from lowermost amphibolite to granulite facies to lower greenschist facies...matrix composed of hematite, quartz, chlorite, calcite, sericite, and pyrite (Fig. 4B). The leucocratic...northwest (Fig. 3). The hornblende-feldspar gneiss outcrops within the fault zone (Fig. 3). The rock is foliated...Kfs1 + Pl1 + Hbl1 (Fig. 4D), compatible with amphibolite facies metamorphism. Retrogression is indicated...Late Chl2 chlorite, Qtz2 quartz, Ab1 albite, Cal1 calcite, and Fig. 5. Various structural and textural relationships |  | | Journal (article/letter/editorial) | | indicates they were produced by greenschist to amphibolite facies dynamothermal metamorphism of alkalic...lavas rrTlJ sheeted dykes STUDIED METAMORPHIC OUTCROPS g bbros ultramafics v v TROODOS COMPLEX v...Cyprus locating the three studied metamorphic outcrops. 33030 ' I 275 width of ca. 1.5 km and is...alkali lavas of the Mamonia Complex. North of the amphibolite unit the fault contains serpentinite within which...grade are tectonically intermixed. Three small outcrops of amphibolites were sampled from southwest, west |  | Kapsiotis, Argyrios, Ewing Rassios, Anne, Grieco, Giovanni, Antonelou, Aspasia (2017) Genesis of Cr-bearing hydrogrossular-rich veins in a chromitite boulder from Ayios Stefanos, West Othris, Greece: A paradigm of micro-rodingites formation at the late stages of oceanic slab emplacement. Ore Geology Reviews, 90. 287-306 doi:10.1016/j.oregeorev.2017.06.006 | Journal (article/letter/editorial) | | Agoriani mélange; Ferrière et al., 1988). Amphibolite outcrops near Lamia and Metalleion have been interpreted...serpentine accompanied by wollastonite, vesuvianite and calcite, and accessory non-silicate phases including Cr-spinel...with garnet. Garnet has been observed embedded in calcite in some veinlets (Fig. 6g). Chromian spinel fragments...Crrich hydrogrossular aggregates surrounded by calcite in some veinlets (Fig. 6g) would suggest hydroxyl-...conditions of high T after devolatilization of calcite- and quartz-rich assemblages. Some studies confirm |  | | Journal (article/letter/editorial) | | (N = 2), 12.6 ± 0.6‰ (N = 4) for < 1 m thick amphibolite layers, and 12.1 ± 0.4‰ (N = 24) for the concordant...interlayered metapelite, quartzofeldspathic gneiss, amphibolite, hornblende gneiss, pyroclastic carbonatite,...green- chist facies (450°C, 3.4 kbar) to upper amphibolite facies (650 to 680°C, 2.5 kbar) in an upward...8.0 6.5 3117 4 Granite 8.4 6.7 3118 4 Amphibolite 3.8 2.5 4.3 2.7 4.1 ? ? ?4 Metaconglomerate...garnet (Gar), amphibole [Am], biotite [Bi], and calcite (Cc), all reported in the 5 notation, where 8 is |  | | Report (issue) | | that has caved from the working. The waste rock, outcrops in the ends of the larger trenches, and pillars...area in the core of the amphibolite mass north of Samrah, Here the outcrops consist of large boulders...boulders was mapped in the nearby, circular mass of amphibolite straddling the dacite-andesite dike swarm east...of gabbro occur sporadically throughout the amphibolite. Northwest and north of the map, gabbro is common...by Quinn in 1964. The gabbro characteristically outcrops in the form of large nearly spherical boulders |  | | Report (issue) | | porphyry.________-___----___--__.-___-___--__ Amphibolite. ___-_____________-_-__--____---_--_-___-____Granite...to 3,500 feet long. The veins are composed of calcite, dolomite, siderite, ankerite, quartz, barite,...chiefly of hornblende schist, hornblende gneiss, amphibolite, metadiorite, and chlorite schist. The Black...therefore are younger than it, but some foliated amphibolite appears to form dikes that cut Powderhorn granite...the carbonate of the mass is dolomite, but some calcite is present (Larsen, 1942, p. 5). Apatite, which |  | | Journal (article/letter/editorial) | | Eastern Palmer Land Shear Zone. Based on the high-amphibolite grade rocks exposed in central western Palmer... Methods and sample description 3.a. Mapping Outcrops containing metamorphic rocks in several previously...containing quartz + muscovite + plagioclase ± garnet ± calcite; the fine-grained metapelites (no optical analyses...−65.47 Orthogneiss E 1661.5 −69.28 −64.63 Amphibolite E 3607.2 Grimley Glacier Mt Sullivan −69.57...−70.96 −67.05 Orthogneiss −70.97 −67.07 Amphibolite −70.96 −66.67 Metasediment −70.64 −67.13 |  | | Journal (article/letter/editorial) | | The Swakop Terrane was metamorphosed to upper amphibolite-facies conditions with anatexis in the Uitdraai...dolomite is white in color with medium, equigranular calcite and dolomite grains. Tremolite needles are rarely...edge of the Okawakuejawa Ridge, the Omusema amphibolite separates the Quelle from the Kudulecke unit...unit. In this locality, the lower part of this amphibolite is interlayered with the upper beds of the Quelle...small lens of Quelle rocks separates the Omusema amphibolite from the Etusis meta-arkose. This complex stratigraphic |  | | Report (issue) | | and upper amphibolite-facies metaplutonic rocks. Sequences of greenschist and lower amphibolite-facies metasedimentary...felsic igneous plugs and sheets. The metatuff unit outcrops in the eastern, central, and southwestern parts...Carolina near Columbia and Camden. bro and amphibolite, relict lapilli in metavolcanic tuff, and relict...compositionally heterogeneous sequence of biotite gneiss, amphibolite, hornblende gneiss, leucocratic gneiss, biotite...heterogeneously deformed, and metamorphosed in the upper amphibolite-facies. This unit is continuous with an extensive |  | | Report (issue) | | ................... A8 Photograph of banded amphibolite of member OCra of the Rowe Schist....................................... A17 Photograph of amphibolite in member A of the Cobble Mountain Formation............ A25 24. Photograph of F x fold in amphibolite of the Rowe Schist ............................lenticular masses of green schist, gray schist, amphibolite, and serpentinized ultramafic rock. Intercalation...Cobble Mountain Formation. Plagioclase gneiss and amphibolite of the pre-Silurian Collinsville Formation core |  | | Journal (article/letter/editorial) | | of the sillimanite-almandite subfacies of the amphibolite facies and lies within the sillimanite zone....SCOTFORD-METAMORPHISM AND AXIAL-PLANE FOLDING, N. Y. Amphibolite Inwood marble Poundridge granite Siscowit granite...Index map 2. Sillimanite-almandite subfacies of amphibolite fades 3. Cation variation 4. Stereographic projection...Fordham migmatite gneiss 10. Measured modes of the amphibolite 11. Estimated modes of the Inwood marble. .....gneisses, and granites, somewhat less in the amphibolite, and little in the marble. Quartz anhedra are |  | | Corporate Document | | intense silicification; biotite or sericite + calcite, K-spar or albite; Fe sulphides ± arsenopyrite;...pyrite Calcite + chlorite + amphiboles + albite; minor pyrite Sericite ± K-spar ± albite; calcite + sphene...sphene ± tourmaline; minor pyrite Sericite + calcite, generally restricted The large volumes of chlorite-rich...Tshanda and Mero deposits. Several mineralised outcrops were also observed, providing limited first hand...this orientation are barren. Massive blocks of amphibolite along with pegmatite outcrop over several tens |  | Crane, A., Goodman, S., Krabbendam, M., Leslie, A. G., Paterson, I. B., Robertson, S., Rollin, K. (2002) Geology of the Glen Shee district - Memoir for 1:50 000 Geological Sheet 56W together with adjacent parts of Sheets 55E, 65W and 64E (Scotland) British Geological Survey, London. | Book | | 87 Pelite and semipelite thermobarometry 89 Amphibolite thermobarometry 89 Interpretation and implications...Compositional zoning profiles in garnets from an amphibolite and a pelite 88 Chemical analyses of 18 samples...mineral compositions for samples of pelite and amphibolite 91 Results of thermobarometric calculations 92...quartzite ridge of Carn an Righ and more widely by amphibolite units which commonly stand up as roches moutonnees...stringers of pyrite and chalcopyrite are found in calcite veins in the metacarbonate rocks in the quarry |  | | Report (issue) | | Ashe the on-strike equivalent (Brown, domains amphibolite dominated Lynchburg Formation in Virginia, Formation...sulphur-rich shale sequences. It is notable that the amphibolite units typically concentrate at lithological breaks...a strong west to east mid-greenschist to mid-amphibolite facies metamorphic gradient. Although a gross...lineament. Paleozoic strata are infolded with amphibolite facies gneisses comprising the Hatcher Complex...Glover, 1983). The apparent continuity of the amphibolite-grade metamorphic overprint of the eastern Chopawamsic |  | | Book | | Conditions of Metamorphism, Structure, 290 Amphibolite, Geochemistry, Petrology, Pelitic Rocks, ...map of the Kenny Hill formation, Upper Paleozoic outcrops in Southeast Asia, Geosynclinal organization...the other on the east. In the center, limited outcrops of mainly Permian rocks occupy anticlinal cores...erosion, and they now form very re- stricted outcrops. In Malacca minor granite bosses were intruded...conclusively demonstrated. The Machinchang Formation outcrops in the west of the Langkawi Islands. It comprises |  | | Journal (article/letter/editorial) | | produced a strong linear fabric under upper amphibolite facies, middle-to-lower crustal conditions. The...derived from experimental studies. Key words: amphibolite; Blue Ridge; dissolution–precipitation creep;...brittle behaviour of clinoamphibole at upper amphibolite facies conditions (750 C) (Dollinger & Blacic...processes in naturally deformed rocks at upper amphibolite conditions is unresolved. This study is designed...schists and gneisses and bands of interfingered amphibolite and ultramafic rocks (Rankin et al., 1973). In |  | | Report (issue) | | ( 1 Cl Face or Form (012, wardite) (2134, calcite) (102, ferberite) (201, augelite) (1011, apatite)...rutilel (013, wulfenite) (0112, calcite) (111 sulfur) (1011, calcite) (120, triphylite) (210, ferberite)...Ferberite Ferrimolybdite Wolframite Scheelite Calcite Magnesite Siderite (Sideroplesite) Rhodochrosite...constituent of a schistose curnrningtonite-tourmaline amphibolite at the Newark gold mine five miles west of Custer...te marble lies in contact with a dark-green amphibolite containing 65 to 75 % hornblende about three |  | | Journal (article/letter/editorial) | | r a n g e at t h e t r a n s i t i o n from amphibolite through granulite to the eclogite facies (Fig...composition displaying mineral equilibria under amphibolite-, granulite-, and eclogite-facies conditions...quartz-amphibolite (Patiño Douce and Beard, 1995); 6d = Grt-in in synthethic quartz amphibolite (Patiño...(Patiño Douce and Beard, 1995); 6e = Grt-in in amphibolite (Liu et al., 1996). Alumosilicate polymorph fields...investigated are shown in Figure 3. The garnet-amphibolite sequence of the Asimah window varies in thickness |  | | Book | | metamorphism increased progressivelyto upper amphibolite and even granulite facies. Yioolsdrif Suite and...Metamorphic Complexes consist ofmidProterozoic, upper amphibolite facies ortho- and paragneisses. metasediments...paragneiss containing quartzite, mica schist and amphibolite layers are the main rock types that make up the...calc-silicate rock, hornblende gneiss and amphibolite. Minor amphibolite dykes cut the granite. A large poorly...distinguish from older ones. Syn- and post-tectonic amphibolite dykes cut the Abbabis rocks. East of Okalim1dja |  | | Report (issue) | | hornblende-biotite gneiss (rh) and biotite gneiss, with minor amphibolite and fine-grained leucocratic gneiss (rl). Leucosomes...and Stern (1994), the Raleigh gneiss may be an amphibolite-facies equivalent of those rocks, and the validity...apatite, zircon, chlorite, epidote, muscovite, calcite, and hematite. Horton and Stern (1994) reported...The schist matrix contains blocks and pods of amphibolite (CZfa) and several types of ultramafic rocks...region of rocks subjected to greenschist to upper-amphibolite facies metamorphism, upright, open folding, and |
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