 | | Journal (article/letter/editorial) | | from the deeper mantle section of the northern Oman ophiolite and its tectonic implications Received:...ïŹrst time in a podiform chromitite of the northern Oman ophiolite. The chromitite contains ÂŁ 1.5 ppm of total...the mantle to the crust (Naldrett 1981; Garuti et al. 1997). PGE-abundance systematics give us information...the early stage of the planetâs history (Jagoutz et al. 1979; Arculus and Delano 1981; OâNeill 1991). PGEs...mineralogy of PGEs in the Oman ophiolite in general, especially in its northern part. We found high PGE |  | | Journal (article/letter/editorial) | | formation of chromite-oversaturated magmas. Spandler et al. (2005) found a mixing trend for the bulk CE chemical...around the chromitite (e.g., Cassard et al., 1981; Lago et al., 1982) (Fig. 1). Following the hypothesis...Yurimoto, 1994; Zhou et 4 ACCEPTED MANUSCRIPT al., 1994) (Fig. 2). Since then, podiform chromitites...various types (e.g., Proenza et al., 1999; Uysal et al., 2005; Borisova et al., 2012; Ahmed and Habtoor, 2015)...ophiolites (e.g., Robinson et al., 2004; Yang et al., 2007, 2015; Yamamoto et al., MA 2009). The whole framework |  | | Journal (article/letter/editorial) | | magma in the reservoir [11]. Recently, Latypov et al. [14] argued for the importance of a pressure reduction...precipitate the stratiform chromitite (see Schulte et al. [2] for more details about stratiform chromitite)...chromitites [19,20] (Figure 1). The Cr# (= Cr/(Cr + Al) atomic ratio) of chromite is not so different; 0...and limited range of the Fe3+ ratio (Fe3+ /(Cr + Al + Fe3+ ) atomic ratio; <0.1) for the podiform chromitites...Cr/(Cr + Al) Minerals 2021, 11, 209 3 of 10 stratiform 0.5 stratiform podiform 3+ Fe Al 0.5 0 |  | Tseng, C.-Y., Yang, H.-Y., Wu, H.-Q., Zuo, G.-C. (2007) THE SILICATE MINERAL INCLUSIONS IN THE CHROMIAN SPINEL FROM THE DONGCAOHE OPHIOLITE, NORTH QILIAN MOUNTAINS, NORTHWESTERN CHINA: RECORD OF SYNTEXIS OF LOWER OCEANIC CRUST. The Canadian Mineralogist, 45 (4) 793-808 doi:10.2113/gscanmin.45.4.793 | Journal (article/letter/editorial) | | INCLUSIONS IN THE CHROMIAN SPINEL FROM THE DONGCAOHE OPHIOLITE, NORTH QILIAN MOUNTAINS, NORTHWESTERN CHINA: RECORD...Peopleâs Republic of China Abstract Diopside, enstatite, pargasite, aspidolite, analcime, chlorite, serpentine...series and discordant layered bodies, Dongcaohe ophiolite, in the North Qilian Mountains, Qinghai Province...enclosed by the growing crystals of chromian spinel. Enstatite, pargasite and aspidolite were products of the...alteration or subsequent seafloor metamorphism of the ophiolite. Syntexis of the lower oceanic crust was involved |  | | Journal (article/letter/editorial) | | contains chromite with an intermediate Cr# (Cr/(Cr + Al)) of 0.4â0.6 is the optimum host for chromitites...genuine MORB, they also form in the typical MA ophiolite tectonic setting, at supra-subduction zone spreading...Peridotiteâmelt reaction, Ridge segment center, Ophiolite, Mantle drilling 1. Introduction Podiform chromitites... PT (chromian spinel) with a high Cr# (Cr/(Cr + Al)) of 0.7â0.9, previous studies have reported SC...podiform chromitites from Maqsad, southern Oman ophiolite, which they interpreted to have formed in mid-ocean |  | | Journal (article/letter/editorial) | | Pierre Saliot, studying the phase relations of MgâAl-rich rocks at high pressure. He held a two-year postdoc...preliminary phase relations in the model system MgO-Al 2O3 -SiO2 -H 2O. American Journal of Science 283-A...Geology 15: 965-982 Simon G, Chopin C (2001) Enstatiteâ sapphirine crack-related assemblages in ultrahigh-pressure...coesite-bearing chromitites from the Luobusa ophiolite, Tibet. Geology 35: 875-878 Frezzotti ML, Selverstone...granulites and in chromitite associated with ophiolite complexes lead to speculation about the recycling |  | | Journal (article/letter/editorial) | | edu.cn) 7 ABSTRACT 8 Primary high-Al [Cr# = 100ĂCr/(Cr+Al) of 48.2â54.7] chromitites coupled with...mineral inclusions including Na-phlogopite, 15 enstatite, diopside, pargasite, olivine, rutile, ilmenite...and occasionally zircon 16 are found in the high-Al chromitites. Chemical compositions of these mineral...ppm; Ga = 11.2â13.3 ppm) in equilibrium with high-Al chromitites suggest that these 22 chromitites...back-arc basin 30 spreading ridge. Subsequently, high-Al chromitites were formed and mechanically 31 juxtaposed |  | | 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 |  | Zhang, Yanfei, Jin, Zhenmin, Griffin, William L., Wang, Chao, Wu, Yao (2017) High-pressure experiments provide insights into the Mantle Transition Zone history of chromitite in Tibetan ophiolites. Earth and Planetary Science Letters, 463. 151-158 doi:10.1016/j.epsl.2017.01.036 | Journal (article/letter/editorial) | | b s t r a c t The chromitites in the Luobusha ophiolite (Tibet) have been proposed as messengers from...O4 structure (idealized composition (Mg, Fe)(Cr, Al)2 O4 ), an indicator of Mantle Transition Zone (MTZ)...Introduction Podiform chromitites in the Luobusha ophiolite (southeastern Tibet) are typically lens-shaped...Cr/Cr + Al) and Mg# (molar Mg/Mg + Fe) of âŒ0.7â0.8 and âŒ0.70â0.76, respectively (e.g., Zhou et al., 2014;...2014; Zhang et al., 2016). Previous studies have shown that these chromitites can be explained by interaction |  | | 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 |  | | Journal (article/letter/editorial) | | ore minerals are Cr-spinel with high Cr# (Cr/(Cr + Al) = 0.8â0.83), as well as serpentine and chlorite...chromitite ores; Cr-spinel; olivine; amphibole; PGM; ophiolite; ultramafic rock; Kempirsai min13020263 Academic...deposits are the largest known ones, contained in ophiolite-type complexes, and are the second-most abundant...reserves, following the Bushveld chromite deposits. Ophiolite deposits are often referred to as so-called podiform...secondary changes. The genesis of chromitites of the ophiolite association is still the subject of debate. Possible |  | | 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#...Paktunc, 1990; Pasava et al., 2011; Escayola et al., 2012; Shi et al., 2012; Ghosh et al., 2013; Najafzadeh...Najafzadeh and Ahmadipour, 2014; Zhou et al. 2014). These are generally referred to as podiform chromitites, being |  | | Journal (article/letter/editorial) | | harzburgiteâduniteâchromitite complexes from the Neoproterozoic ophiolite, south Eastern Desert, Egypt: A possible recycled...high-Cr varieties. The average Cr-ratio (=Cr/(Cr + Al) atomic ratio) of chromian spinel in the chromitites...fertile mantle character with Al-rich chromian spinels (Cr-ratio = Cr/(Cr + Al) atomic ratio < 0.6), and... 1984; Arai, 1997a; Dilek and Thy, 1998; Arai et al., 2011). On the other hand, the refractory mantle...arc environments (e.g. Zhou et al., 1998; Dare et al., 2009; Arai et al., 2011). In many cases, ophiolites |  | | Journal (article/letter/editorial) | | in the Eastern Desert of Egypt, namely; Wadi Muweilha, Wadi Arayis and Gabal Kurbiyay. The present peridotites...lacking from the northern part. The best preserved ophiolitic successions are known from Wadi Ghadir, Fawakhir...1983; Zimmer et al. 1995; El-Sayed et al. 1999; Basta et al. 2011; Abdel-Karim et al. 2016; Abdel-Karim...Abdel-Karim and El-Shafei 2018; Azer et al. 2019). Serpentinites represent the most characteristic lithology...(e.g. Farahat et al. 2004; Abd El-Rahman et al. 2009a) or fore-arc (e.g. Stern et al. 2004; Geology Department |  | Pujol-SolĂ , NĂșria, Proenza, JoaquĂn, Garcia-Casco, Antonio, GonzĂĄlez-JimĂ©nez, JosĂ©, 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 [16,23â39] (Figure 1a,b). The synorogenic...plate (Figure 1b) [23,27,28,35,36]. The Cuban Ophiolite Belt represents oceanic lithosphere obducted onto...Ophiolites The MayarĂ-Baracoa ophiolite belt, in the eastern part of the Cuban Ophiolite Belt, outcrops for The...The MayarĂâBaracoa ophiolite belt, in the eastern part of the Cuban Ophiolite Belt, outcrops for more |  | | Book | | Spreading-rate paran1eters in ocean crust: analogue for ophiolite? .......... . SMEWl:---JG, J. D., C HRISTENSEN...upper mantle and lower crust as deduced fro,n the northern section of the On1an ophio lite ................variation within the Cumu late Sequence of the Oman ophiolite: mag,na cha ,nber depth and petrological implications...North Arm Mountain massif of the Bay of Islands ophiolite, Newfoundland ..................................Petrology of the Upper Pillow Lava suite, Troodos ophiolite, Cyprus .................... .. ............. |  | | Journal (article/letter/editorial) | | atmospheric CO2 level The Paleozoic SSZ-type ophiolite and subduction rollback in the eastern Junggar...present day values (Kasting, 1993; Berner et al., 2001; Kaufman et al., 2003). If so, it would imply a high...(xamzhongping@cgs.gov.cn) There are two Paleozoic ophiolite belts, Karamaili and Aermantai, in the eastern...northerly Aermantai ophiolite, aged by 503 to 481Ma (Xiao et al., 2006; Jian et al., 2003), has been testified...et al., 2001) of suprasubduction zone (SSZ). Our data show that the southerly Karamaili ophiolite, generated |  | | Journal (article/letter/editorial) | | MR12A-01. [2] Goreva et al. (2001) American Mineralogist, 86, 466-472. [3] Ma et al. (2002) American Mineralogist... 269-276. [4] Ma et al. (2007) Canadian Mineralogist, 45, 551-557. [5] Ma et al. (2001) Canadian Mineralogist...3 7 4 4 [1] Oliver et al. (1984) GCA 48, 1759-1767. [2] PiersonWickman et al. (2001) EPSL 194, 165-175...et al. (2010) GCA 74, 4893-4901. [4] Lupton and Evans (2004) GRL 31, L13101. [5] Brennwald et al. (2013)...palaeothermometer to natural dolostone samples from the Northern Marion Platform (NMP, offshore NE Australia) and |
|
