 | | Journal (article/letter/editorial) | | contact-metamorphosed dunite-harzburgite complex at Yanomine, eastern Chugoku, Japan Yoshinori INOUE* , *** and Katsuo...Science, Okayama University, Okayama 700 − 8530, Japan Department of Earth Sciences, Faculty of Science...Science, Okayama University, Okayama 700 − 8530, Japan *** Present address: Nikko Exploration and Development...Toranomon 2 − 7 − 10, Minato − ku, Tokyo 105 − 0001, Japan ** Phlogopite was found in small amounts in the...metamorphic aureole of the dunite − harzburgite complex at Yanomine. Phlogopite occurs intimately associated |  | | Journal (article/letter/editorial) | | Metamorphosed Dunite-Harzburgite Complex in the Chugoku District, Western Japan Shoji Arai Geological Institute...Faculty of Science, University of Tokyo, Tokyo, Japan Received January 16, 1975 / Accepted June 3, 1975...1975 Abstract. The Tari-Misaka ultramafic complex, which is emplaced into the Paleozoic sediments and...Petrological and mineralogical characters of the ultramafic rocks can be well explained by thermal metamorphism...pressures (< 3kb). Introduction M a n y Alpine-type ultramafic complexes occur in the Paleozoic formations of |  | | Journal (article/letter/editorial) | | d peridotite-sediment system from Nagasawa, SW Japan: implications for mobility of elements in a hydrothermal...contactmetamorphosed peridotite-sediment system from Nagasawa, SW Japan: implications for mobility of elements in a hydrothermal...d peridotite-sediment system from Nagasawa, SW Japan: implications for mobility of elements in a hydrothermal...University, 1060 Nishikawazu, Matsue, Shimane 690-8504, Japan. 2. Department of Earth Sciences, Kanazawa University...University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan. E-mail: ultrasa@staff.kanazawa-u.ac.jp 3. Present |  | ARAI, Shoji, PRICHARD, Hazel M., MATSUMOTO, Ichiro, FISHER, Peter C. (1999) Platinum-Group Minerals in Podiform Chromitite from the Kamuikotan Zone, Hokkaido, Northern Japan. Resource Geology, 49 (1) 39-47 doi:10.1111/j.1751-3928.1999.tb00030.x | Journal (article/letter/editorial) | | Chromitite from the Kamuikotan Zone, Hokkaido, Northern Japan Shoji ARAI*, Hazel M. PRICHARD**, Ichiro MATSUMOTO***...in the Sarugawa peridotite complex in the Kamuikotan zone, Hokkaido, Japan. This is the first report on...(= platinum-group minerals) from chromitites in Japan. The Ru-Os-Ir alloys most typically form polyhedra...zone than in those in the Sangun zone of Southwest Japan, consistent with the more refractory nature (Cr#...dunite from the Inazumi-yama complex in the Sangun zone, Southwest Japan. It is well known that PGM are |  | | Journal (article/letter/editorial) | | facies: evidence from the Happo-O’ne metaperidotites (Japan) Mohamed Zaki Khedr Æ Shoji Arai Received: 1 April...peridotite complex is situated in the northeastern part of the Hida Marginal Tectonic Zone, central Japan, characterized...Kanazawa University, Kakuma, Kanazawa 920-1192, Japan e-mail: khedrzm@yahoo.com formation of low-T, low-Ti... Forearc mantle Happo-O’ne metaperidotites Japan Introduction Upper mantle peridotites change their...peridotites. The Happo-O’ne metaperidotites, central Japan, are associated with high-P/T schists of the Renge |  | | Journal (article/letter/editorial) | | rocks Syn-emplacement thrust fault Sheeted dyke complex Backthrust fault Normal fault Acadian thrust...chromite outer rims, and also along fractures, into a complex mixture of alteration phases (serpentine + chlorite...either with a SIMS ion microprobe (Tari-Misaka ultramafic complex, Northern Oman, Central Oman, Troodos;...Ocean) Tr = Troodos Supra-subduction zone (SSZ) Japan Arc Xenolith TMO boninite NO 50 MO R rce dep...CO = Central Oman JUM = Japanese Tari-Misaka Complex (TM) Ultramafic Northern Oman - UAE Massifs FIG |  | | Journal (article/letter/editorial) | | rocks Syn-emplacement thrust fault Sheeted dyke complex Backthrust fault Normal fault Acadian thrust...chromite outer rims, and also along fractures, into a complex mixture of alteration phases (serpentine + chlorite...either with a SIMS ion microprobe (Tari-Misaka ultramafic complex, Northern Oman, Central Oman, Troodos;...Ocean) Tr = Troodos Supra-subduction zone (SSZ) Japan Arc Xenolith TMO boninite NO 50 MO R rce dep...CO = Central Oman JUM = Japanese Tari-Misaka Complex (TM) Ultramafic Northern Oman - UAE Massifs FIG |  | Proenza, J.A., Zaccarini, F., Escayola, M., Cábana, C., Schalamuk, A., Garuti, G. (2008) Composition and textures of chromite and platinum-group minerals in chromitites of the western ophiolitic belt from Pampean Ranges of Córdoba, Argentina. Ore Geology Reviews, 33 (1) 32-48 doi:10.1016/j.oregeorev.2006.05.009 | Journal (article/letter/editorial) | | (Argentina) were studied at Los Congos and Los Guanacos ultramafic bodies, with regard to the composition and textures...some massive chromitites from the Los Guanacos ultramafic body, and is similar to Al-rich ophiolitic chromitites...chromitites and associated metamorphosed ultramafic rocks show complex replacement and exsolution textures...hosted in a metamorphosed Neoproterozoic ophiolitic complex (640 Ma; Escayola et al., in press), located in...the ranges (Gordillo and Lencinas, 1979). The ultramafic rocks are arranged in two belts of NW–SE trend |  | Huang, Yang, Wang, Lu, Kusky, Timothy, Robinson, Paul T., Peng, Songbai, Polat, Ali, Deng, Hao (2017) High-Cr chromites from the Late Proterozoic Miaowan Ophiolite Complex, South China: Implications for its tectonic environment of formation. Lithos, 288. 35-54 doi:10.1016/j.lithos.2017.07.014 | Journal (article/letter/editorial) | | chromites from the late Proterozoic Miaowan Ophiolite Complex, South China: Implications for its tectonic environment...chromites from the late Proterozoic Miaowan Ophiolite Complex, South China: Implications for its tectonic environment...chromites from the late Proterozoic Miaowan Ophiolite Complex, SC R IP T South China: Implications for its...for formation. The Proterozoic Miaowan Ophiolite Complex (MOC) in the NU Yangtze Craton contains disseminated...Miaowan Ophiolite SC R IP T mantle wedge. Complex; AC CE P TE D MA NU Supra-subduction zone; |  | Habtoor, Abdel Monem, Ahmed, Ahmed Hassan, Akizawa, Norikatsu, Harbi, Hesham, Arai, Shoji (2017) Chemical homogeneity of high-Cr chromitites as indicator for widespread invasion of boninitic melt in mantle peridotite of Bir Tuluha ophiolite, Northern Arabian Shield, Saudi Arabia. Ore Geology Reviews, 90. 243-259 doi:10.1016/j.oregeorev.2017.03.010 | Journal (article/letter/editorial) | | Sciences, Kanazawa University, Kanazawa 920-1192, Japan * Corresponding author: ahmh2jp@yahoo.com Abstract...petrogenetic indicator, even in highly serpentinized ultramafic rocks (Liipo et al., 1995; Ahmed et al., 2005)...are abundant as varyingly dismembered mafic– ultramafic assemblages that have suffered multiple phases...including podiform chromitites and their host ultramafic rocks. The parental melt composition in equilibrium...zone. From the viewpoint of age, the known mafic-ultramafic complexes in the Arabian Shield of Saudi Arabia |  | Xie, Hong-Jing, Wang, Yu-Wang, Guo, Bo-Ran, Shi, Yu, Zhou, Guo-Chao (2019) Characteristics and petrogenesis of the “Pale Microgranular Masses” in ophiolite-type chromitites in northern Xinjiang. Ore Geology Reviews, 115. 103168 doi:10.1016/j.oregeorev.2019.103168 | Journal (article/letter/editorial) | | “Pale Microgranular Masses” (PMMs) with mafic to ultramafic compositions have been discovered in representative...(olivine-rich) vitrobasaltic rocks, gabbro-diabasic rocks, ultramafic rocks, tuffaceous-pyroclastic rocks, skarns/rodingites...fabrics, the PMMs are considered to be xenoliths in ultramafic magma. The geochemical characteristics of the...most likely indicative of Ca-metasomatism by the ultramafic magma. The breakdown of clinopyroxene in peridotites...processeses of xenolith formation and metasomatism by ultramafic magma in the early stage, whereas the characteristics |  | Pujol-Solà, Núria, Proenza, Joaquín, Garcia-Casco, Antonio, González-Jiménez, José, Andreazini, Aleu, Melgarejo, Joan, Gervilla, Fernando (2018) An Alternative Scenario on the Origin of Ultra-High Pressure (UHP) and Super-Reduced (SuR) Minerals in Ophiolitic Chromitites: A Case Study from the Mercedita Deposit (Eastern Cuba). Minerals, 8 (10). 433pp. doi:10.3390/min8100433 | Journal (article/letter/editorial) | | metamorphic sole (the Güira de Jauco Amphibolite Complex) related to the onset of ophiolite obduction [16...Coto Block (Philippines [47]). interlayering of ultramafic and gabbroic rocks. Dunite (from few centimeters...lizardite is the main phase. However, in some samples chrysotile and antigorite were also recognized [50]. The...described in chromitites of the Bushveld layered complex in South Africa [69] as well as in other ophiolitic...fluids are associated with serpentinization of ultramafic rocks in the submarine and subduction zone environments |  | | Journal (article/letter/editorial) | | “block” gneisses, with granites of the Sumsunur complex. The USO is underlaid by thevolcanogenic contact...metapyroxenite, metagabbro), a basic dike and a volcanic complex (Ilchir suite) (Figures 2 and 3). (metawehrlite...metapyroxenite, a basic dike anddirection a volcanic complex suite) (Figures 2 USO has a lenticular body thatmetagabbro)...island-arc andesites are distinguished in the volcanic complex. All rocks in the ophiolite nappe bottom are intensively...island-arc andesites are distinguished in the volcanic complex. All rocks in the ophiolite nappe bottom are intensively |  | Derbyshire, E.J., O'Driscoll, B., Lenaz, D., Zanetti, A., Gertisser, R. (2019) Chromitite petrogenesis in the mantle section of the Ballantrae Ophiolite Complex (Scotland) Lithos, 344. 51-67 doi:10.1016/j.lithos.2019.06.013 | Journal (article/letter/editorial) | | the mantle section of the Ballantrae Ophiolite complex (Scotland) E.J. Derbyshire, B. O'Driscoll, D....the mantle section of the Ballantrae Ophiolite complex (Scotland), LITHOS, https://doi.org/10.1016/j.lithos...the mantle section of the Ballantrae Ophiolite Complex (Scotland) Derbyshire, EJ1 , O’Driscoll, B2,* brian...Podiform chromitites from the Ballantrae Ophiolite Complex (BOC), NW Scotland, are examined to investigate...zone mantle. PT Keywords: Ballantrae Ophiolite Complex, supra-subduction zone, podiform chromitite, upper |  | | Journal (article/letter/editorial) | | University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan. PT *Corresponding author. Tel: +2-047-3215174...Introduction The Neoproterozoic ophiolitic ultramafic complex in the Eastern Desert (ED) of Egypt is a...petrogenesis and tectonic setting of Egyptian ultramafic rocks based on primary chromian spinels that...peridotites. 2. Geological setting The ophiolitic ultramafic complex composed mainly of serpentinites and associated...Quadrangle, 2009). The boundaries D between ultramafic rocks and surrounding country rocks mainly form |  | | Journal (article/letter/editorial) | | scale. I-type petrogenesis appears to be more complex and probably involves mixing processes (mixed sources...1698555, Japan (*correspondence: m-shikit@aoni.waseda.jp) 2 School of Engineer., Univ. of Tokyo, Japan 3 Center...Asian Studies, Tohoku Univ., Japan 4 Grad. School of Sci., Kanazawa Univ., Japan 1 Petit-spot, new type young...from twelve petit-spot volcanoes at a site in the Japan Trench (Site A), a site approximately 600 km ESE...Canada (dames@nrcan.gc.ca) 1 The Sudbury Igneous Complex (SIC), Ontario, Canada, is a large (~60km x 30km) |
|
