 | | Journal (article/letter/editorial) | | 2752 Crystal size distribution analysis of plagioclase from gabbro-anorthosite suite of Kuliana, Orissa...bottom to top by gabbro, gabbronorite, leucogabbronorite, anorthositic gabbronorite and anorthositic gabbro...similar to cycle I, except that the anorthositic gabbronorite and anorthositic gabbro units are not present...typically with bimodal size distribution of plagioclase, and pyroxene oikocrysts. Thus, Type II texture...(EPMA) data indicate uniform composition of plagioclase (An76–85), both from inclusions in pyroxene oikocrysts |  | Tsuchiya, Nobutaka, Shibata, Tomoyuki, Yoshikawa, Masako, Adachi, Yoshiko, Miyashita, Sumio, Adachi, Tatsurou, Nakano, Nobuhiko, Osanai, Yasuhito (2013) Petrology of Lasail plutonic complex, northern Oman ophiolite, Oman: An example of arc-like magmatism associated with ophiolite detachment. Lithos, 156. 120-138 doi:10.1016/j.lithos.2012.10.013 | Journal (article/letter/editorial) | | 020-8550, Japan Institute for Geothermal Sciences, Kyoto University, Beppu 874-0903, Japan Graduate School...Technology, Niigata University, Niigata 950-2181, Japan d Division of Evolution of Earth Environments, Kyushu...Kyushu University, Fukuoka 819-0395, Japan b c a r t i c l e i n f o Article history: Received 3 November...olivine websterite, olivine gabbronorite, gabbronorite, hornblende gabbronorite, leucogabbronorite (layered...gabbros, and sometimes grades into hornblende gabbronorite layer of the layered gabbros. In some places, anastomosing |  | Yang, Sheng-Hong, Hanski, Eero, Li, Chao, Maier, Wolfgang D., Huhma, Hannu, Mokrushin, Artem V., Latypov, Rais, Lahaye, Yann, O’Brien, Hugh, Qu, Wen-Jun (2016) Mantle source of the 2.44–2.50-Ga mantle plume-related magmatism in the Fennoscandian Shield: evidence from Os, Nd, and Sr isotope compositions of the Monchepluton and Kemi intrusions. Mineralium Deposita, 51 (8) 1055-1073 doi:10.1007/s00126-016-0673-9 | Journal (article/letter/editorial) | | chromitite with 50 to 90 % of chromite (Figs. 3a, b), peridotite (Fig. 3c), and pyroxenite (Fig. 3d), whereas...whereas the upper sequence is composed of gabbronorite (Fig. 3e) and leucogabbro (Fig. 3f). The most fractionated...intervals (Fig. 3a) separated by a silicate-rich layer. The chromitite is 40 m thick on average, but its...The uppermost chromitite layer occurs about 370 m above the main chromitite layer. Miner Deposita Fig...of a basal peridotite unit, overlain by harzburgite, pyroxenite, norite, and gabbronorite (Figs. 4 and |  | | Journal (article/letter/editorial) | | ith or enclosedby anunusualxenolith-bearing gabbronorite. Bothtype I andII chromititesare interpretedto...The subsequent cycle generated the Gabbro Hill plagioclase pyroxinure-groupelement explorationin Tasmaniain...LHERZOLITE SEQUENCE (plagioclase)dunRe,Iherzollteand harzburgite GABBRO HILL PLAGIOCLASE PYROXENITE SEQUENCE...SEQUENCE plagioclase orthopyroxenite, harzburglte and dunire CAUDRY'S HILL ORTHOPYROXENITE SEQUENCE oilvine...oilvine orthopyroxenite and plagioclase pyroxenite FENTONrS SPUR PERIDOTITE SEQUENCE dunire, peridotire |  | | Journal (article/letter/editorial) | | olivine and chromite by incongruent melting of gabbronorite in the upper part of the crystal pile. The hydrous...reaction, on mixing with resident pyroxene + plagioclase-saturated liquids in the magma chamber, produced...produced hybrid liquids with crystallization order plagioclase followed by olivine or pyroxene, depending on...Troctolite subzone composed of troctolite, dunite, gabbronorite and anorthosite, and an overlying Anorthosite...subzone are the product of partial melting of gabbronorite fluxed by fluids exsolved during crystallization |  | | Journal (article/letter/editorial) | | South Africa, is part of an extensive intrusive body that reaches up to 1 km in thickness, and has a...initial 87Sr/86Sr (Ro) values at 183 Ma for the entire body show wide variations (0.705 to 0.711). Based on...succession. Most of the upper half of the body is gabbronorite, derived from a low-Mg magma with an initial...experienced such sulfide segregation. In the gabbronorite are three olivine-rich layers, the lower two...plupart de la séquence supérieure est faite de gabbronorite, dérivée à partir d’un magma à faible teneur |  | Christopher Jenkins, M., Mungall, James E., Zientek, Michael L., Holick, Paul, Butak, Kevin (2020) The Nature and Composition of the J-M Reef, Stillwater Complex, Montana, USA. Economic Geology, 115 (8). 1799-1826 doi:10.5382/econgeo.4777 | Journal (article/letter/editorial) | | Naldrett, 1986; Zientek, 2012). The J-M reef is a thin layer of PGE-rich disseminated sulfide mineralization...literature to describe either (1) a mineralized rock layer with a distinctive texture or composition or (2)...sulfide mineralization that occurs within a host-rock layer (Wagner, 1929; Naldrett, 2004; Zientek, 2012). Today...(named A to K from lowermost to uppermost chromitite layer), some with associated PGE mineralization (the A...A and B chromitites), within the Peridotite zone in the Ultramafic series of the complex (Peoples and |  | | Journal (article/letter/editorial) | | at 2732-2+ 1-0/—0-9 m-y. Principal phases are plagioclase, orthopyroxene, augite (and pigeonite in iron-rich...phases at advanced stages of fractionation. Plagioclase, pyroxenes and olivine are cumulate phases. Hornblende...and parallel to structures suggestive of flow. Plagioclase laths also have a preferred orientation in many...present. Layered gabbro units occur near contacts and layer attitudes generally parallel contacts which are...extensive. Pillowed basalts, one of which contains plagioclase megacrysts, occur near locality 5A (Fig. 2) along |  | Alapieti, T. T., Fil�n, B. A., Lahtinen, J. J., Lavrov, M. M., Smolkin, V. F., Voitsekhovsky, S. N. (1990) Early Proterozoic layered intrusions in the northeastern part of the Fennoscandian Shield. Mineralogy and Petrology, 42 (1) 1-22 doi:10.1007/bf01162681 | Journal (article/letter/editorial) | | whole boninitic in composition, whereas the plagioclase-rich intrusions and megacyclic units are interpreted...by serpentine, the pyroxenes by uralites, and plagioclase by saussurite, etc. On the other hand, the cumulus...of volcanic and sedimentary rocks, the lowermost layer of which is commonly represented by polymictic conglomerate...mylonitized, being composed of tremolite, talc, plagioclase and carbonate. The layered series begins with...movements during the Svecokarelidic orogeny to form a body dipping about 70 ° northwestward. Geophysical interpretations |  | | Journal (article/letter/editorial) | | gabbronorites. Euhedral, zoned primocrystic laths of plagioclase (An62.5-80.6; 0.2 to 4 mm long) are morphologically...oikocrysts enclosing numerous partly rounded plagioclase chadacrysts. Rarely, orthopyroxene appears as...smaller (0.08 to 0.4 mm), equant plagioclase inclusions. Detailed plagioclase and pyroxene mineral compositions...mol% Mg#). In layers 2 to 5, the An-content of plagioclase cores and the Mg# of both clinopyroxene and orthopyroxene...magmatic differentiation. Based on the consistent plagioclase crystal morphologies and relatively constant |  | | Journal (article/letter/editorial) | | cumulus minerals: olivinite, norite, gabbronorite, and a zone of gabbronorite with pigeonite [9]. At the same...intercalating melano-, meso, and leuconorites include a gabbronorite unit [8]. In the lowermost sulfide-bearing layers...contain no olivine and the Cr concentration in plagioclase is negligibly low, the equation for Cr balance...rock-forming minerals are orthopyroxene (bronzite) and plagioclase [9]. According to the composition of the rocks...bottom) consists of norite, which grades into gabbronorite in the central part. The lower part of overlying |  | | Journal (article/letter/editorial) | | mafic rocks in places, caused lateral variations in layer development, and led to the crystallisation of some...(assumed to be horizontal and discordant to the layer dip) lies at ca. 1000 m below surface. This observation...top of at least one norite lens. Postcumulus plagioclase, clinopyroxene and biotite are present in relatively...lower part of the MS is dominated by norite (plagioclase-opx cumulate with postcumulus clinopyroxene)...(generally fine grained with much postcumulus plagioclase and clinopyroxene as prominent oikocrysts) is |  | | Journal (article/letter/editorial) | | at the base of > 1 km of homogenous Main Zone gabbronorite. Based on stratigraphic, lithological and compositional...metres of quenched to fine-grained norite and gabbronorite (Sharpe 1981). The LZ consists predominantly...interlayered harzburgite, dunite and orthopyroxenite. Plagioclase is rarely present as a cumulate phase (Cameron...there is a significant increase in intercumulus plagioclase (from 2 to 6 %: Cameron 1978), or ~ 200 m lower...anorthosite, forming a laterally continuous, 1–3-m-thick layer. Further anorthosite layers Miner Deposita occur |  | | Book | | Kingdom, Germany, Greece, Finland, Denmark, Russia, Japan, South Africa, Zimbabwe, and Australia, this book...The basaltic melt is able to separate from its peridotite source at very low melt fractions, percolating...labeled 0% to 30%. Plumes may carry much hotter peridotite up below the subcontinental lithosphere, following...basalts. By the time a particular volume of mantle peridotite has risen through the melting zone and 5 J...sharply decreases the solidus temperature of peridotite, permitting the removal of large fractions of |  | Evins, Paul M., Smithies, R. Hugh, Howard, Heather M., Kirkland, Christopher L., Wingate, Michael T.D., Bodorkos, Simon (2010) Devil in the detail; The 1150–1000Ma magmatic and structural evolution of the Ngaanyatjarra Rift, west Musgrave Province, Central Australia. Precambrian Research, 183 (3) 572-588 doi:10.1016/j.precamres.2010.02.011 | Journal (article/letter/editorial) | | base of the basalt is composed of fine-grained plagioclase porphyritic gabbro with abundant xenoliths of...margins. At the base of the basalt is a 30 m wide layer of grey medium- coarse-grained volcanolithic sandstone...online at http://www.dmp.wa.gov.au/geochron. this layer yielded only detrital zircon inherited from the...10–50 m wide dykes and sills of fine-grained plagioclase-phyric gabbro cut the MacDougall Formation below...basalt in the bottom magnetite-rich, olivine gabbronorite layer of the Finlay-Jameson Phase 2 layered mafic |
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