 | | Journal (article/letter/editorial) | | history: The Pacific-derived Santa Elena ophiolite, northwest Costa Rica Javier Escuder-Viruete, Peter...history: The Pacific-derived Santa Elena ophiolite, northwest Costa Rica, LITHOS (2015), doi: 10.1016/j...history: the Pacific-derived Santa Elena ophiolite, northwest Costa Rica SC R IP T Javier Escuder-Viruete...NU a Abstract MA The Santa Elena ophiolite (SEO) is an ultramafic nappe of more than 270 km2 overlying...tectonic serpentinite-matrix mélange in northwest Costa Rica. It is mainly composed of Cpx-rich and Cpx- |  | | Journal (article/letter/editorial) | | complexes: A case study of the Nicoya and Santa Elena terranes, Costa Rica Scott A. Whattam, Esteban Gazel...complexes: A case study of the Nicoya and Santa Elena terranes, Costa Rica, LITHOS (2016), doi: 10.1016/j...complexes: A case study of the Nicoya and Santa Elena terranes, Costa Rica RI Scott A. Whattam1*, Esteban... Universidad de Costa Rica, AC CE P TE D P.O. Box 214-2060, San José Costa Rica. E-mail: pdenyer@geologia...within the contrasting Santa Elena Ophiolite and the Nicoya Complex, NW Costa Rica, to investigate the origin |  | Escuder-Viruete, Javier, Andjić, Goran, Baumgartner-Mora, Claudia, Baumgartner, Peter O., Castillo-Carrión, Mercedes, Gabites, Janet (2019) Origin and geodynamic significance of the Siuna Serpentinite Mélange, Northeast Nicaragua: Insights from the large-scale structure, petrology and geochemistry of the ultramafic blocks. Lithos, 340. 1-19 doi:10.1016/j.lithos.2019.05.002 | Journal (article/letter/editorial) | | structure, petrology and geochemistry of the ultramafic blocks Javier Escuder-Viruete, Goran Andjić...structure, petrology and geochemistry of the ultramafic blocks, LITHOS, https://doi.org/10.1016/j.lithos...structure, petrology and geochemistry of the ultramafic blocks Javier Escuder-Viruetea,* j.escuder@igme...bulk rock geochemical data for representative ultramafic rocks preserved as blocks in the SSM. Structurally...high-pressure (P) conditions. There are also blocks of ultramafic rocks, which consist mainly of harzburgite and |  | Ruan, Banxiao, Yu, Yingmin, Lv, Xinbiao, Feng, Jing, Wei, Wei, Wu, Chunming, Wang, Heng (2017) Occurrence and mineral chemistry of chromite and related silicates from the Hongshishan mafic-ultramafic complex, NW China with petrogenetic implications. Mineralogy and Petrology, 111 (5) 693-708 doi:10.1007/s00710-016-0480-0 | Journal (article/letter/editorial) | | related silicates from the Hongshishan mafic-ultramafic complex, NW China with petrogenetic implications...are responsible for the emplacement of mafic-ultramafic complexes in the Beishan Terrane. The cores of...reaction of ferrous chromite, forsterite and magnetite to produce ferrian chromite and chlorite, or alternaively...envisioned as the result of external addition of magnetite in solution to the already formed ferrous chromite...complex . Beishan Abstract The Hongshishan mafic-ultramafic complex is located in the western Beishan Terrane |  | | Journal (article/letter/editorial) | | Article Petrogenetic Implications for Ophiolite Ultramafic Bodies from Lokris and Beotia (Central Greece)...Published: 3 March 2017 Abstract: Cr-spinels from ultramafic rocks from Lokris (Megaplatanos and Tragana)...serves as an important petrogenetic indicator for ultramafic and related rocks [1]. Since the chemical composition...Megaplatanos ophiolite (Figure 1a) is a small ultramafic body consisting of serpentinite, serpentinised...Megaplatanos, Tragana, Ypato The Tragana ophiolite nappe comprises mainlyoccurrences serpentinite and serpentinised |  | Merinero, Raúl, Lunar, Rosario, Ortega, Lorena, Piña, Rubén, Monterrubio, Serafín, Gervilla, Fernando (2014) Zoned chromite records multiple metamorphic episodes in the Calzadilla de los Barros ultramafic bodies (SW Iberian peninsula) European Journal of Mineralogy, 26 (6) 757-770 doi:10.1127/ejm/2014/0026-2406 | Journal (article/letter/editorial) | | metamorphic episodes in the Calzadilla de los Barros ultramafic bodies (SW Iberian peninsula) RAÚL MERINERO1...Abstract: Podiform chromitites occurring in the ultramafic bodies of Calzadilla de los Barros, in the Ossa-Morena...transformation to ferrian chromite and Cr-rich magnetite. However, some of them exhibit complex chemical...[(Mg, Fe2þ) (Cr, Al, Fe3þ)2O4] in serpentinised ultramafic rocks and associated podiform chromitites is...zoning of chromite in chromitites and dunites from ultramafic bodies of Calzadilla de los Barros, in the Ossa-Morena |  | ISHWAR-KUMAR, C., RAJESH, V.J., WINDLEY, B.F., RAZAKAMANANA, T., ITAYA, T., BABU, E.V.S.S.K., SAJEEV, K. (2018) Chromite chemistry as an indicator of petrogenesis and tectonic setting of the Ranomena ultramafic complex in north-eastern Madagascar. Geological Magazine, 155 (1) 109-118 doi:10.1017/s0016756816000972 | Journal (article/letter/editorial) | | petrogenesis and tectonic setting of the Ranomena ultramafic complex in north-eastern Madagascar C . I S H...accepted 20 September 2016) Abstract – The Ranomena ultramafic complex in NE Madagascar consists of layered...setting. Keywords: Chromite, chromitite, Ranomena ultramafic complex, Betsimisaraka suture, NE Madagascar...commonly occurs as an accessory phase in mafic-ultramafic rocks and as the major mineral in chromitite...earliest minerals to crystallize from a mafic-ultramafic magma and a sensitive indicator of primary magma/melt |  | | Journal (article/letter/editorial) | | islands, (South Kalimantan Province—Tanah Ambungan; South Sulawesi Province—Baru; Papua—Jayapura) chromites...Sulawesi—Bungku). Kalimantan Province—Tanah Ambungan; Central South Sulawesi Province—Baru; Papua—Jayapura)...chromium used in steelmaking and in with large, ultramafic stratiform-type intrusions Bushveld Africa [17...podiform-type ophiolite associated with large, ultramafic layered intrusions Bushveld Africa sequences:...forming pods and lenses inside the mafic and ultramafic sequences:Luzon—Philippines Massif of Bulqiza—Albany |  | | Journal (article/letter/editorial) | | expected to behave in a similar way in chromite and magnetite as they share similar ionic radii (Cr3+ , r =...crystal chemistry of spinels from some suites of ultramafic rocks. Mineral. Petrol. 1989, 40, 117–126. [CrossRef]...of podiform chromitites in the metamorphosed Ultramafic Massif of Dobromirtsi (Bulgaria). Gondwana Res...elements mineralization in the Santa Elena ultramafic nappe (Costa Rica): Geodynamic implications. Geol...spinel compositions in terrestrial mafic and ultramafic rocks. J. Petrol. 2001, 42, 2279–2302. [CrossRef] |  | Palomares, R. M., Hernandez, R. L., Menor, L. O., Garcia, R. P., Perez, S. M., Linares, F. G. (2013) HYDROTHERMAL PALLADIUM ENRICHMENT IN PODIFORM CHROMITITES OF CALZADILLA DE LOS BARROS (SW IBERIAN PENINSULA) The Canadian Mineralogist, 51 (3) 387-404 doi:10.3749/canmin.51.3.387 | Journal (article/letter/editorial) | | post-magmatic formation of chalcopyrite, millerite, magnetite, and chalcedony. Olivine in harzburgites and dunites...variable proportions of euhedral and rounded magnetite, and euhedral rutile. The matrix of CM and RO...CUCO and CAB chromitites exhibits chalcedony-magnetite associations (Fig. 2b) and chalcopyrite partially...with multiple chlorite (chl) inclusions, and magnetite (mgt, bright white) and chalcedony (qz-chal) surrounding...addition, some harzburgites contain chlorite, magnetite, ilmenite, talc, magnesite, calcite, chalcopyrite |  | Grieco, Giovanni, Bussolesi, Micol, Tzamos, Evangelos, Rassios, Annie Ewing, Kapsiotis, Argyrios (2018) Processes of primary and re-equilibration mineralization affecting chromitite ore geochemistry within the Vourinos ultramafic sequence, Vourinos ophiolite (West Macedonia, Greece) Ore Geology Reviews, 95. 537-551 doi:10.1016/j.oregeorev.2018.03.009 | Journal (article/letter/editorial) | | chromitite ore geochemistry within the Vourinos ultramafic sequence, Vourinos Ophiolite (West Macedonia...chromitite ore geochemistry within the Vourinos ultramafic sequence, Vourinos Ophiolite (West Macedonia...chromitite ore geochemistry within the Vourinos ultramafic sequence, Vourinos Ophiolite (West Macedonia...2009). The boundary between mantle rocks and ultramafic cumulates (dunite, wehrlite and pyroxenite cumulates)...(Jackson et al., 1975). In the Krapa Hill area, ultramafic cumulates progressively grade to mafic cumulate |  | Mohanty, Niranjan, Singh, Surya Pratap, Satyanarayanan, Manavalan, Jayananda, Mudlappa, Korakoppa, Madiwalappa Mallappa, Hiloidari, Sikha (2019) Chromian spinel compositions from Madawara ultramafics, Bundelkhand Craton: Implications on petrogenesis and tectonic evolution of the southern part of Bundelkhand Craton, Central India. Geological Journal, 54 (4) 2099-2123 doi:10.1002/gj.3286 | Journal (article/letter/editorial) | | University of Hyderabad, Hyderabad, India Madawara ultramafic complex (MUC) in the southern part of Bundelkhand...amphibole (Amp), Al‐chromite, Fe‐ chromite, and magnetite with rare orthopyroxene (Opx) are common minerals...in the formation of Fe‐chromite, chrome magnetite, and magnetite. Mineral chemistry data suggest that Al‐chromite...and Fe‐chromite leads to formation of Cr‐magnetite and magnetite. The Cr# of Al‐chromite varies from 55...region common ubiquitous accessory phase in many ultramafic–mafic rocks (Arai, 1980; Barnes & Roeder, 2001; |  | | Journal (article/letter/editorial) | | high-Ti) within separated massifs or a single ultramafic massif makes their 47 formation processes and...chromitite varieties outcropping within 90 the same ultramafic massif provide an ideal window to indicate the...fault (Fig. 2a). The ophiolite consists mainly of ultramafic rocks, podiform 123 chromitites, cumulates...numerous 124 veins of gabbro and diabase. The ultramafic rocks are mostly harzburgite with minor 125...sandstones, and conglomerates tectonically overlie the ultramafic rocks (Fig. 2d). 131 The Sartohay podiform |  | | Journal (article/letter/editorial) | | high-Cr spinels, chromian andradite, Mg-olivine, magnetite, mixture of iron (III) oxyhydroxides (limonite)...region, i.e., the Cyclops ophiolite [5], Papuan Ultramafic Belt [6,7], Seram-Ambon ophiolite [8] and ophiolites...Department of Mineral and Energy Resources in the Papua Province selected six geological provinces with high deposit...Southern Papua and Fafak. The Jayapura geological province contains the Cu–Zn–Pb–Fe–Cr–Co–Ni–Au mineralization...B), olivine, serpentine subgroup, Cr-garnets, magnetite, a small amount of pyroxene and a mixture of hydrated |  | Sideridis, Alkiviadis, Zaccarini, Federica, Koutsovitis, Petros, Grammatikopoulos, Tassos, Tsikouras, Basilios, Garuti, Giorgio, Hatzipanagiotou, Konstantinos (2021) Chromitites from the Vavdos ophiolite (Chalkidiki, Greece): Petrogenesis and geotectonic settings; constrains from spinel, olivine composition, PGE mineralogy and geochemistry. Ore Geology Reviews, 137. 104289pp. doi:10.1016/j.oregeorev.2021.104289 | Journal (article/letter/editorial) | | the intensive tectonic deformation. The lower ultramafic part of some complexes (Vavdos, Gerakini) was...(Dabitzias, 1980). Upper section, crustal level ultramafic (wehrlite and pyroxenite) and mafic rocks (gabbros)...exclusively associated with dunite bodies withing the ultramafic sequence. Textural types of chromitite at Vavdos...oxygen fugacity as a deviation from the Fayalte-Magnetite-Quartz buffer (FMQ). The oxygen fugacity is positively...ophiolite, the dash line represents the Fayalite-Magnetite-Quartz buffer (FMQ); b) oxygen fugacity versus |  | 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) | | 2O4] is a common mineral in a variety of mafic-ultramafic rocks. Its unique AC physicochemical properties...west (Fig. 2a). A WNW-trending suite of mafic-ultramafic rocks comprising the MOC includes plagiogranite...al., 2016; Peng et al., 2012). Serpentinised ultramafic rocks mainly TE D crop out in the central...about 13 km long and 1-2 km wide (Fig. 2a). The ultramafic rocks are bounded CE P by layered gabbros and...the north (Fig. 2b). Both the AC mafic and ultramafic rocks have undergone strong ductile and brittle |
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