 | | Journal (article/letter/editorial) | | of chromite by hydrothermal solutions in the Oman ophiolite: New behavior of Cr and chromite Shoji Arai*...metasomatically replacing the layered gabbro of the Oman ophiolite. The uvarovite shows oscillatory concentric...concentric zoning in terms of Cr no. [Cr/(Cr+Al)], and the chromite is embedded only in the high-Cr-no. zones...Mg/(Mg+Fe2+) = 0.1–0.2, TiO2 < 0.3 wt% and Fe3+/(Cr+Al+Fe3+), up to 0.3], but its Cr no. is clearly different...7) in peridotites and chromitites from the Oman ophiolite. The results from this study suggest that a |  | Arai, Shoji, Miura, Makoto, Tamura, Akihiro, Akizawa, Norikatsu, Ishikawa, Akira (2020) Hydrothermal Chromitites from the Oman Ophiolite: The Role of Water in Chromitite Genesis. Minerals, 10 (3) 217 doi:10.3390/min10030217 | Journal (article/letter/editorial) | | Article Hydrothermal Chromitites from the Oman Ophiolite: The Role of Water in Chromitite Genesis Shoji...hydrothermal fluids, in the mantle to the crust of the Oman ophiolite. Here, we present petrologic characteristics...magmatic podiform chromitite by dominance of the Ca-Al silicates in the matrix. The fluids responsible for...(especially Pt and Pd). The fluids obtain Ca and Al from the crustal rocks and Cr from the mantle rocks...Keywords: hydrothermal chromitites; Ca-Al silicates; seawater; Oman ophiolite; slab-derived fluids; platinum-group |  | | Journal (article/letter/editorial) | | the Voidolakkos and Xerolivado mines, Vourinos ophiolite complex, Greece: implications for deformation-induced...Xerolivado districts, located in the Vourinos ophiolite complex, northwestern continental Greece, were...that shows a quite restricted range of Cr# [Cr/(Cr + Al)] values varying between 0.76 and 0.83, whereas Mg#...chromite is paragenetically associated with clinochlore even in unaltered chromitite specimens and the...responsible for the formation of the ferrian chromite–clinochlore association. In addition, magnesiochromite alteration |  | | Journal (article/letter/editorial) | | D classified into two main types: primary high-Al (spinel Cr# <0.67) and high-Cr (spinel Cr#> TE ...mineral inclusions, K-phlogopites, Neoproterozoic ophiolite, 1. Introduction CE P Eastern Desert of Egypt...and high-Al) in the mantle section (e.g., Zhou et al., 1998; Uysal et al., 2009; Miura et al., 2012; Akmaz...Akmaz et al., 2014; Moghadam et al., 2015). The high-Cr chromitites have been in equilibrium with boninitic...boninitic or Mg-rich andesitic melts, while high-Al chromitites are interpreted as having crystallized |  | 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) | | in peridotites and associated chromitites from ophiolite complexes, along with minerals that typically...Amphibolite Complex) related to the onset of ophiolite obduction [16,23–39] (Figure 1a,b). The synorogenic...plate (Figure 1b) [23,27,28,35,36]. The Cuban Ophiolite Belt represents oceanic lithosphere obducted onto...Ophiolites The Mayarí-Baracoa ophiolite belt, in the eastern part of the Cuban Ophiolite Belt, outcrops for The...The Mayarí‐Baracoa ophiolite belt, in the eastern part of the Cuban Ophiolite Belt, outcrops for more |  | | Book | | bin Said Al Shanfari Minister of Petroleum and Minerals The Speech of H.E. Said Bin Ahmed Al Shanfari...Symposium Your Royal Highness Sayed Fahad Bin Mahmoud al Said, Your Royal Highness Members of the Honourable...pleasure to welcome you in this scientific gathering in Oman which has been made possible through the directives...contribute to the advancement of earth sciences. We, in Oman look forward with keen interest to the outcome of... I wish to thank the Ministry of Defence, Royal Oman Police and the Ministry of Information for their |  | Satsukawa, Takako, Piazolo, Sandra, González-Jiménez, José María, Colás, Vanessa, Griffin, William L., O'Reilly, Suzanne Y., Gervilla, Fernando, Fanlo, Isabel, Kerestedjian, Thomas N. (2015) Fluid-present deformation aids chemical modification of chromite: Insights from chromites from Golyamo Kamenyane, SE Bulgaria. Lithos, 228. 78-89 doi:10.1016/j.lithos.2015.04.020 | Journal (article/letter/editorial) | | bodies known as chromitites (e.g., González-Jiménez et al., 2014). Scientific interest in chromite arises from...2010; González-Jiménez et al., 2012, 2014; Miura et al., 2012; Walker et al., 2002). Chromitites in ophiolites...Gervilla et al., 2005; González-Jiménez et al., 2014; Melcher et al., 1997; Proenza et al., 1999; Zhou...Zhou et al., 1994, 1996). A global chromitite cycle from crust to mantle and back again has been suggested...geochemical studies (Arai, 2013; McGowan et al., T. Satsukawa et al. / Lithos 228–229 (2015) 78–89 2015, |  | Idrus, Arifudin, Zaccarini, Federica, Garuti, Giorgio, Wijaya, I, Swamidharma, Yoseph, Bauer, Christoph (2022) Origin of Podiform Chromitites in the Sebuku Island Ophiolite (South Kalimantan, Indonesia): Constraints from Chromite Composition and PGE Mineralogy. Minerals, 12 (8) 974 doi:10.3390/min12080974 | Journal (article/letter/editorial) | | of Podiform Chromitites in the Sebuku Island Ophiolite (South Kalimantan, Indonesia): Constraints from...of Podiform Chromitites in the Sebuku Island Ophiolite (South Kalimantan, Indonesia): Constraints from...podiform chromitites in the Jurassic–Cretaceous ophiolite of Sebuku Island (South Kalimantan, Indonesia)...composition (Cr/(Cr + Al) > 0.7) occurs in the deep mantle, the other, high-Al (Cr/(Cr + Al) < 0.6), is located...affinity to IAT and MORB, for the high-Cr and high-Al chromitites, respectively. However, both are believed |  | | Journal (article/letter/editorial) | | the E‒W trend SC from Wadi Sayfayn, Wadi Bardah, and Jabal Al-Faliq to Wadi Al-Barramiyah, from east...[Cr/(Cr + Al)], 0.41–0.80, with low TiO2 (0.03 wt%), MnO (0. 3 wt%) and YFe [(Fe3+ /(Cr + Al + Fe3+)...increasing of their host-peridotite thickness from Northern to Southern Eastern SC Desert suggests that...Arabian-Nubian Shield (ANS). The ANS, which is the northern extent of the East African Orogen (550‒850 Ma)...formed in and close to the Mozambique Ocean (Fritz et al., 2013). The ED ophiolites were emplaced on the continent |
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