 | | Journal (article/letter/editorial) | | Building 420, Beltsville, Maryland Gneissic Amphibolite at Las Palmas, Puerto Rico, and Its Significance...chert and spilite, and locally small blocks of amphibolite. A detailed structural and metamorphic study...study of a relatively large block of gneissic amphibolite at Las Palmas reveals that the rock has undergone...serpentinite. The first event recorded by the amphibolite is amphibolite facies regional metamorphism. Foliation...but metamorphosed mafic dikes cut the gneissic amphibolite. As the metamorphic grade decreased further, |  | Janoušek, V., Vrána, S., Erban, V., Vokurka, K., Drábek, M. (2008) Metabasic rocks in the Varied Group of the Moldanubian Zone, southern Bohemia - their petrology, geochemical character and possible petrogenesis. Journal of GEOsciences, 53 (1) 31-64 | Journal (article/letter/editorial) | | Bohemia). The amphibolites are dominated by amphibolite-facies mineral assemblages of mainly tschermakitic...rocks subjected to a high-grade (up to upper amphibolite-facies) metamorphic overprint (Floyd and Winchester...gneisses and subordinate carbonate rocks, in the amphibolite-facies Varied Group, particularly at the contact...and the Mesoproterozoic Dobra gneiss in Lower Austria (Gebauer and Friedl 1994; Friedl et al. 2004)....Gföhl Unit, with its typical occurrence in Lower Austria, contains mainly nebulitic biotite migmatites, |  | | Report (issue) | | crystalline terrane. The mica schist and gneiss and amphibolite southwest of Newland pass northward through a...predominate is in almost direct contact with amphibolite and mica schist lacking granitic layers. (STOP...blastomylonite (STOP 4). The mica schist and amphibolite have a crystalloblastic texture, except in a...THE GRANFATHER MOUNTAIN AREA, N.C. Spruce Pine district. In many places the granodiorite and pegmatite...converted to amphibolite and metagabbro. Near the northern edge of the Spruce Pine district, Wilcox and |  | | Report (issue) | | crystalline terrane. The mica schist and gneiss and amphibolite southwest of Newland pass northward through a...predominate is in almost direct contact with amphibolite and mica schist lacking granitic layers. (STOP...blastomylonite (STOP 4). The mica schist and amphibolite have a crystalloblastic texture, except in a...THE GRANFATHER MOUNTAIN AREA, N.C. Spruce Pine district. In many places the granodiorite and pegmatite...converted to amphibolite and metagabbro. Near the northern edge of the Spruce Pine district, Wilcox and |  | | Report (chapter) | | May 21, 2018 The granulite- to eclogite- and amphibolite-facies transition: a volume and mass transfer...de Abstract: This study is focused on a specific outcrop in the Bergen Arcs, Norway where the transition...and the hydrated eclogite and amphibolite is exposed. In this outcrop the foliation in the granulite...continuous as it passes through eclogite- and amphibolite-facies rocks, presenting a challenge to understanding...increases from granulite to the eclogite and to the amphibolite. During hydration and metamorphism, the density |  | | Journal (article/letter/editorial) | | staurolite from the Iratsu body, central epidote amphibolite Shikoku KAZUMIYOKOYAMA* and ATSUSHIGOTO** *Departmentof...corundum-bearing rocks from the Iratsu epidote amphibolite body in the highest grade metamorphic area of...of Mg rich staurolite from the Iratsu epidote amphibolite body in the Sanbagawa metamor phic belt which...Africa, respec rocks from the Iratsu epidote amphibolite body in the Sanbagawa metamorphic belt (Fig....only from the body to date. epidote already amphibolite. As the samples were described by Yokoyama (1980) |  | | Journal (article/letter/editorial) | | INTRODUCTION Mineral assemblages in upper amphibolite facies metapelitic rocks from the Skagit Gneiss...The Skagit Gneiss consists of lower- to upper amphibolite facies metasedimentary and meta-igneous rocks...sample localities (small solid circles; SK-6 = amphibolite, SK-11 =biotite schist; urn = ultramafic rock)...Fault Zone; Tv = Tertiary volcanic rocks; * = outcrop of staurolite + hornblende-bearingamphibolites...a metapelitic rock, a biotite schist, and an amphibolite are given in Table 1. Major element abundances |  | | Journal (article/letter/editorial) | | ............... Keewatinmeta-sediments and amphibolite............................ 344 344 346 346...The mineralization is near the contact between amphibolite (derived from lavas) and quartz-richschist (derived...Quartzo-feldspathic hornblendeschist(meta-tuff) Amphibolite(meta-basaltand meta-andesite) Post-Keewatin ...G. F. JOKLIK The schistosemeta-sedimentsthat outcrop in the southern part of the mineralized area are...Hornblende-rich,quartz-poorrocks,for the most part amphibolite,outcrop in the northernand easternportionsof the |  | Zhao, Lei, Zhai, Mingguo, Zhou, Xiwen, Santosh, M., Ma, Xudong (2015) Geochronology and geochemistry of a suite of mafic rocks in Chencai area, South China: Implications for petrogenesis and tectonic setting. Lithos, 236. 226-244 doi:10.1016/j.lithos.2015.09.004 | Journal (article/letter/editorial) | | granulite, garnet-bearing amphibolite, biotite-bearing amphibolite, and amphibolite from the Chencai region...Cathaysia Block of South China, that mostly record amphibolite to granulite facies metamorphism. U–Pb dating...granulite and biotite-bearing amphibolite show broadly coeval magmatism, and amphibolite- to granulite-facies...metamorphism during 435–438 Ma. The garnet-bearing amphibolite also records metamorphism at 436 Ma and the magmatic...emplacement age of 422 Ma. Geochemically, the amphibolite and granulite have high Al2O3 contents and belong |  | | Journal (article/letter/editorial) | | shown that the rocks correspond to the epidote–amphibolite facies (T = 400– 450°C, P = 3–4 kbar) and are...consists of the foliated uniform amphibolite in the footwall and gneiss–amphibolite unit in the hanging wall...increases in the same direction as well. Garnet amphibolite from the upper reaches of the Kholodny Klyuch...chosen as an object of isotopic dating. Garnet amphibolite occurs in the hanging wall of the metamorphic...metamorphic complex and intercalates with common amphibolite and quartzitic gneiss (Fig. 3). The metamorphic rocks |  | | Journal (volume) | | St. Daniel Formation at St. Daniel . . 13. Amphibolite Sole . . . . . . . . . . . 14. Pillow Lavas of...along a basal sole of serpentinite and, locally, amphibolite. The upper unit (Fig. 4) has a highly sheared...way south toward Vermont. Stop 13 looks at the amphibolite sole of the lower unit. Stops 14 and 15, northwest...fibers. However, 99 percent of the asbestos in this district is short fiber, and all the ore is now milled...mine (Viny Ridge Mine), and go onto the weathered outcrop. Two kinds of ultramafic rock occur here; see Figure |  | | Journal (article/letter/editorial) | | regional schistosity. In the Moyale sub-area amphibolite facies conditions prevailed, whereas in the Agal...sub-area peak conditions did not exceed epidote-amphibolite facies. Plagioclase-hornblende thermometry gives... 584 0 1Kin Metagranodiorite Porphyritic amphibolite $1 fabric Gabbro.-diorite Amphibolitic gneiss...'amphibolitic gneiss' and 'porphyritic amphibolite'. The 'amphibolite gneiss' is the dominant type and ranges...rocks occur in subordinate amounts within the amphibolite of the Agal sub-area. The largest, a north-south-trending |  | Franceschelli, Marcello, Puxeddu, Mariano, Cruciani, Gabriele, Dini, Andrea, Loi, Marilisa (2005) Layered amphibolite sequence in NE Sardinia, Italy: remnant of a pre-Variscan mafic silicic layered intrusion?. Contributions to Mineralogy and Petrology, 149 (2) 164-180 doi:10.1007/s00410-004-0642-7 | Journal (article/letter/editorial) | | Cruciani Æ Andrea Dini Æ Marilisa Loi Layered amphibolite sequence in NE Sardinia, Italy: remnant of a...Abstract A banded amphibolite sequence of alternating ultramafic, mafic (amphibolite) and silicic layers...Sardinia) and shows similarities with leptyno-amphibolite complexes. The ultramafic layers consist of amphibole...in many mafic silicic layered intrusions. Some amphibolite showing a strong Ti-, Pdepletion and REE-depletion...al. (2002) and Franceschelli et al. (2003). An outcrop at Monte Plebi, NE Sardinia, has attracted attention |  | Beard, Brian L., Medaris, L. Gordon, Johnson, Clark M., Jelínek, Emil, Tonika, J., Riciputi, Lee R. (1995) Geochronology and geochemistry of eclogites from the Mariánské Lázně Complex, Czech Republic: Implications for Variscan orogenesis. Geologische Rundschau, 84 (3) 552-567 doi:10.1007/bf00284520 | Journal (article/letter/editorial) | | Tepl&Barrandian microplate and consists of metagabbro, amphibolite and eclogite, with subordinate amounts of serpentinite...--+7, and 367 + 4 Ma. Samples of eclogite and amphibolite do not define a whole rock Sm-Nd isochron, even...(1991); lenses of feldspathic gneiss in garnet amphibolite are not shown for the sake of clarity. Investigated...Sample Localties arble,Calc-SilicateRock, Epidote Amphibolite 1-~ Gneiss N Eclogiticrocks R Metagabbro...Stosch and ZEV N4 .J Amphibolite GarnetAmphibolite with Titanite Garnet Amphibolite with Rutile A N 50 |  | | Journal (article/letter/editorial) | | granulite facies and the transitional zone to amphibolite facies in the western part of the Aldan granulite...rocks: lower temperature rocks (conditions of amphibolite facies) are characterized by higher DREE values...granulite (outcrops 1365, 1564, 1585) and amphibolite (outcrop 1559 for comparison) facies in the upper...the upper reaches of the Aldan River [13]. In outcrop 1365, we studied highK charnockite nebulites (chgn...and 2654 ± 13 (1365yu) Ma [13]. In contrast, in outcrop 1585, we studied the early anatectic charnockite |  | | Journal (article/letter/editorial) | | Metabasic rocks interbedded in amphibolite facies supracrustal gneisses outcrop around Lac Cornu in the A~gmllesRouges...belong on a regional scP:le to ~he almandine-amphibolite subfacies. The age of the metamorphism which... LITHOS O,lmm . 14(1981) Boudinaged amphibolite,,~ outcrop at numerous places in the massif. They...lase-hornblende association in the ec~ogite amphibolite (see text). deformation. Its influence is restricted...Hercynian or older?) which has induced the regional amphibolite facies. Relics of kyanite (Belli6re 1954) occurring |  | | Journal (article/letter/editorial) | | three separate, closely spaced lines of amphibolite outcrop, interpretation of the original amphtbolite...amphtbolite stlatigraphy (i.e. recognition of discrete amphibolite units) is diffic~it. This is because there are...between individual lenses, and ~ecause the effect on outcrop patterns of complex multiple folding is imperfectly...imperfectly understood. Discoatinuity of the amphibolite bands along st,'ike may be due to either original...particularly close field association between amphibolite and quartzite. reminiscent of the common association |  | | Report (issue) | | samples from the Basement Complex in the Kenema district 93 20 Rb-Sr data for granite gneiss samples from...resulting in trends ranging between NNW and NNE and amphibolite-facies metamorphism imposed on 1 , 2, 3, 4, and...4 3 Deformation resulting in E-W trends and amphibolite-grade metamorphism imposed on 1 and 2 2 Deposition...has been differentiated. Metamorphism was of amphibolite facies grade and the episode terminated with...axial planar fabric. Metamorphism was in the amphibolite facies. A second deformation phase resulted in |  | | Journal (article/letter/editorial) | | ex- Fig. 3. Lamination and deformation in amphibolite outcrop, Tegina area. 383 Fig. 4. Photomicrograph...bAverage Tegina amphibolite (Hornblende) (30 samples). CAverage Tegina epidote---amphibolite (8 samples)...dAverage Alawa banded amphibolite (NW Nigeria) (15 samples). eAverage Egbe massive amphibolite (West-central...Ilesha massive amphibolite (SW Nigeria) (25 samples). gAverage Wonu banded amphibolite (SW Nigeria) (10 |  | | Journal (article/letter/editorial) | | RELATIONS, PETROGRAPHY AND GEOCHEMISTRY OF ARCHAEAN AMPHIBOLITE DYKES AND MALENE SUPRACRUSTAL AMPHIBOLITES, NORTHWEST...relations, petrography and geochemistry of Archaean amphibolite dykes and Malene supracrustal amphibolites, northwest...northwest Buksefjorden. Eight varieties of Ameralik amphibolite dykes have been recognised on the basis of field...intruded by two principal varieties of Malene amphibolite dykes that are similar to two main categories...and Malene dykes are similar to the Tinissaq amphibolite dykes which intrude an older facies of Nfik gneisses |  | Li, Ruibao, Pei, Xianzhi, Yang, Shuanhai, Wei, Liyong, Li, Zuochen, Yang, Gaoxue, Xu, Duoxun, Liu, Mannian, Kou, Ting (2016) Mid-Neoproterozoic Tadong amphibolites at the junction of the East Kunlun and Western Qinling Orogens – a record of continental rifting during the break-up of Rodinia. International Geology Review, 58 (4) 455-470 doi:10.1080/00206814.2015.1089423 | Journal (article/letter/editorial) | | The mineral assemblage of the TDA exhibits amphibolite facies metamorphism, and the protolith is basic...Group (Pt1J) mainly includes strongly deformed amphibolite, mica-schist, and paragneiss, with some deformed...schist and biotite quartz schist, with a few amphibolite (metabasalt) interlayers. The upper Palaeozoic–Mesozoic...conformable contact relationship between schist and amphibolite. Company, Britain. Zircon U–Pb dating in situ...2015 INTERNATIONAL GEOLOGY REVIEW 5 Figure 4. Outcrop photos and microscopic photos of the Tatong schist |  | | Report (issue) | | Mineralization North Carolina Robert Butler) District, 78 Southernmost at Four Gold Slate Belt Mine...Element Signature of Some Major Dahlonega District, Lumpkin County, Jc., and James R. Burnell, Jr... of new not the been Ducktown previously district and described. the Hail information. serves...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 |  | | Journal (article/letter/editorial) | | Basin, and one sample of strongly weathered amphibolite from immediately beneath the conglomerate. Nineteen...one core sample of chlorite schist and one amphibolite outcrop, all samples were highly weathered, with...with the Murrouli Basalt and consists of mafic amphibolite and chlorite schist 312 D.F. Lascelles, D...ferruginized with solid goethite crusts at the surface. Amphibolite grade metamorphism and weathering have typically...folding and faulting into narrow lenses, with the outcrop commonly composed of very high-grade (N 68 wt.% |  | Dlamini, N., Hofmann, A., Belyanin, G., Xie, H., Kröner, A., Wilson, A., Slabunov, A. (2017) Supracrustal gneisses in southern Swaziland: a basalt-sandstone assemblage of the upper Mozaan Group deformed in the Neoarchaean. South African Journal of Geology, 120 (4) 477-498 doi:10.25131/gssajg.120.4.477 | Journal (article/letter/editorial) | | assemblage of ductilely deformed supracrustal rocks (amphibolite and quartzite) and granitoid gneisses intruded...three deformational events (D1, D2 and D3) at amphibolite and retrograde greenschist facies grade. The...South Africa, 1988) as greenstone remnants (amphibolite, talc-carbonate schist and serpentinebearing...a heterogeneous assemblage of serpentinite, amphibolite, gabbroic gneiss, quartzite, diorite, augen-gneiss...have destroyed any protolith textures. Amphibolite Amphibolite occurs in different varieties, varying |  | | Report (volume) | | ...................................... . In amphibolite. ...................... r ............................. 85 35 Corundum (emery) in amphibolite at Chester, Mass...........' . In anorthosite --...-........................... Origin of emery in amphibolite at Chester, Mass.................. * 81 86 92...corundum localities in the United States. ....... II. Outcrop of peridotite at Buck Creek, Clay County, N. C......... VII. A, General appearance of sapphire district near Yogo Gulch, Montana; B, Face of dike in open |
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