 | | Report (chapter) | | on June 21, 2015 Subduction zone polarity in the Oman Mountains: implications for ophiolite emplacement...metamorphism of rocks beneath the Semail ophiolite in the Oman mountains. Model A involves a single, continuous...in the pre-Permian basement rocks of Saih Hatat is interpreted as reflecting subduction beneath the margin...misinterpretation of the NE-facing structures in northem Saih Hatat, and on some dubious older 4~ cooling ages from...eclogite-facies rocks of As Sifah. We conclude that all structures in northern Oman and all the reliable |  | YAMATO, P., AGARD, P., GOFFĂ, B., DE ANDRADE, V., VIDAL, O., JOLIVET, L. (2007) New, high-precision P?T estimates for Oman blueschists: implications for obduction, nappe stacking and exhumation processes. Journal of Metamorphic Geology, 25 (6) 657-682 doi:10.1111/j.1525-1314.2007.00722.x | Journal (article/letter/editorial) | | 2007.00722.x New, high-precision PâT estimates for Oman blueschists: implications for obduction, nappe stacking...de la piscine, 38041 Grenoble, France ABSTRACT Oman blueschists and eclogites lie below the obduction...the low-grade units (10 kbar, <300 C) and the As Sifah eclogites (Pmax 23 kbar; Tmax 600 C).TWEEQU...yield a high-precision PâT path for the Hulw and As Sheikh units and reveal that they shared a common...comprising the Saih Hatat window (i.e. the Ruwi-Quryat, the Hulw-As Sheikh and the Diqdah-As Sifah units). These |  | | Report (chapter) | | exhumation of a high-pressure metamorphic terrane, Oman J. M c L . M I L L E R 1,4, R . T. G R E G O R Y...exhumation process for these rocks. High-P rocks occur as stacked fold-nappes within a less deformed upper...northeastern sector of the Saih Hatat window (Figs 1 and 2) is unique in Oman, because these sequences...undeformed autochthon. The high-pressure rocks of Saih H a t a t share many of the characteristics of A...geochronology with a new structural framework for the Saih Hatat window, and then consider the implications of |  | | Report (chapter) | | accompanied by development of a major shear zone in Saih Hatat (the upper plate-lower plate discontinuity described...structure and Tertiary evolution of the mountain range. Oman ophiolite obduction clearly involves ocean-vergent...1984; Mitchell 1986) or subduction zone 'lock-up', as a result of attempted subduction of continental margins...margin. The Samail Ophiolite of the Sultanate of Oman on the Arabian Peninsula (Fig. 3) is the best-exposed...the obduction process may not be as simple as originally defined. In Oman, there is clear evidence that |  | | Report (chapter) | | Aberdeen on February 15, 2015 Metamorphism in the Oman Mountains in relation to the Semail ophiolite emplacement...rocks associated with the Semail ophiolite in the Oman Mountains represent two different facies series... The amphibolites of the metamorphic sole formed as a result of heat transfer from the hot overthrust...metamorphosed farther away from the spreading centre as the ophiolitic slab became cooler and moved closer...and crossite epidote schists formed in the Saih Hatat window as a result of A-type subduction (crustal thickening) |  | | Journal (article/letter/editorial) | | structural levels beneath the Semail ophiolite, Oman, record the subduction and later exhumation of the...rutile (79.6 ± 1.1 Ma) ages for the eclogites, as well as new U-Pb zircon ages for trondhjemites from the...with published interpretations of older 40Ar/39Ar phengite and Sm-Nd garnet dates. We show that the available...Introduction The Semail Ophiolite of Oman has long been lauded as the largest, most complete and best...beneath the ophiolite, which outcrops in northern Oman. The ïŹrst, patchily exposed along the length of |  | | Journal (article/letter/editorial) | | exhumation of blueschists and eclogites from NE Oman: new perspectives from RbâSr and 40Ar/39Ar dating...Department of Earth Sciences, Sultan Qaboos University, Oman, and Geology Department, Idaho State University...and RbâSr methods. Despite extensive efforts, phengite dated by the 40 Ar/39Ar method yielded saddle...ages for the phengite ranged from 136 to 85 Ma. Clinopyroxeneâphengite, epidoteâphengite and whole-rockâphengite...whole-rockâphengite RbâSr isochrons for the same samples yielded ages of 78ÂĄ2 Ma. We therefore conclude that |  | | Journal (article/letter/editorial) | | OPHIOLITES AND THE GEOLOGICAL STRUCTURE OF EASTERN OMAN a b N. A. Bogdanov , N. L. Dobretsov & A. L. Knipper...OPHIOLITES AND THE GEOLOGICAL STRUCTURE OF EASTERN OMAN, International Geology Review, 33:9, 858-878, DOI:...make no representations or warranties whatsoever as to the accuracy, completeness, or suitability for... OPHIOLITES AND THE GEOLOGICAL STRUCTURE OF EASTERN OMAN N. A. Bogdanov, N. L. Dobretsov, and A. L. Knipper..."Ofiolity i geologicheskoye stroyeniye Vostochnogo Oman," Izvestiya AN SSSR, Seriya geologicheskaya, 1991 |  | Gray, David R, Hand, Martin, Mawby, Jo, Armstrong, Richard A, Miller, John McL, Gregory, Robert T (2004) SmâNd and Zircon UâPb ages from garnet-bearing eclogites, NE Oman: constraints on High-P metamorphism. Earth and Planetary Science Letters, 222 (2) 407-422 doi:10.1016/j.epsl.2004.03.016 | Journal (article/letter/editorial) | | Zircon UâPb ages from garnet-bearing eclogites, NE Oman: constraints on High-P metamorphism David R. Gray...Samail Ophiolite, Oman record an early subduction-related high-P metamorphism as well as subsequent overprinting...garnet-bearing eclogite assemblages in the As Sifah subwindow in NE Oman are 110 F 9 Ma (DG02-87D); 5-point isochron)...obducted Samail oceanic lithosphere (97 â 94 Ma) as well as the subsequent obduction onto the margin (80...ophiolite obduction are inappropriate to explain the Oman high-P metamorphism. D 2004 Elsevier B.V. All rights |  | | Journal (article/letter/editorial) | | deeply subducted metasediment from As Sifah, northeastern coast of Oman Hans-Joachim Massonne a,â, Joachim...of Earth Sciences, Sultan Qaboos University, Muscat, Oman a r t i c l e i n f o Article history: Received...November 2012 Keywords: Phengite Garnet Ultrahigh pressure metamorphism Oman Metasediment P-T pseudosection...coastal village of As Sifah, NE Oman, eclogite-facies rocks occur in the Saih Hatat window. We investigated...which is composed of mm-sized garnet and greenish phengite and minor epidote, blue amphibole, paragonite |  | Jolivet, L, GoffĂ©, B, Bousquet, R, OberhĂ€nsli, R, Michard, A (1998) Detachments in high-pressure mountain belts, Tethyan examples. Earth and Planetary Science Letters, 160 (1) 31-47 doi:10.1016/s0012-821x(98)00079-x | Journal (article/letter/editorial) | | and the infraophiolitic units of the Saih Hatat window in the Oman Mountains, we describe the tectono-metamorphic...major shear zone, or between the shear zones in Oman, the deformation regime was more coaxial and involved...in immature mountain belts such as Crete, the eastern Alps and the Oman Mountains, and show here that they...Letters 160 (1998) 31â47 ducted ophiolite nappe in Oman [5,6]. In most cases, detachments are first recognized...The phengitic substitution of micas (expressed here as the Si4C content) growing together with carpholite |  | | Journal (article/letter/editorial) | | 00 Eclogites and Blueschists from Northeastern Oman: Petrology and P-T Evolution by ALEY EL-DIN EL-SHAZLY...Grossularite Mgt = Magnetite Opq = Opaque phase Ph = Phengite [Journal qfPnroloty, Vol 31, Pin 3, pp. 629-666...continental shelf deposits in the Saih Hatat tectonic window of northeastern Oman, where they structurally underlie...crossite-epidote schists in central and western Saih Hatat grade into blueschists and eclogites at AsSifah...C. Zoning patterns of garnets, pyroxenes, and phengite, and the compositions of pyroxene and amphibole |  | | Book | | GeoGuide Mike Searle Geology of the Oman Mountains, Eastern Arabia GeoGuide Series Editors Wolfgang...springer.com/series/11638 Mike Searle Geology of the Oman Mountains, Eastern Arabia 123 Mike Searle Department...grateful thanks for the wonderful life we had in Oman in the early days. It is also dedicated to all those...and geologists, both local Omanis and Emiratis as well as foreigners, who are working towards the preservation...this amazing and wonderful country. Foreword Oman and the UAE possess several geological wonders that |  | | Journal (article/letter/editorial) | | almandine: constraints on the metamorphic history of the Oman mountains Anke S. Wendt a,b Philippe D'Arco a, Bruno...observed in metapelite samples from the southeastern Saih Hatat tectonic window, northeastern O m a n Mountains...quartz, apatite, zircon, rutile and Ba-AI phosphates as inclusions. Quartz and apatite inclusions in the...Subsequently, these cracks were filled with kaolinite, phengite (Si content 3.4 per formula unit, p.f.u.), chlorite...for the peak conditions for these rocks of the Saih Hatat tectonic window. On the basis of these P-T data |  | | Report (chapter) | | UK (e-mail: mikes@earth.ox.ac.uk) Abstract: The Oman Mountains contain a number of unique and very special...Heritage importance. Large-scale developments in Oman and UAE have already affected some of these sites...paper outlines the geological importance of 50 sites as National GeoParks and Sites of Special Scientific...Scientific Interest (SSSI). Three geological sites in Oman are so unique and so special that they warrant World... Other world-class sites include the Sifah eclogites, the Oman Exotics, Majlis al-Jinn, sites of âSnowball |  | | Journal (article/letter/editorial) | | formation and emplacement of the Semail ophiolite in the Oman Mountains MICHAEL P. SEARLE* & JON COX *Department...metamorphic sole along the base of the Semail ophiolite in Oman records the earliest thrust slice subducted and...data from the sub-ophiolite metamorphic sole in Oman and the United Arab Emirates indicate that the ophiolite...subduction zone during Late Cretaceous times. Keywords: Oman, ophiolite, subduction, mid-ocean ridges, metamorphism...(Glennie et al. 1973, 1974). Controversy still exists as to the tectonic setting of the Semail ophiolite and |  | | Journal (article/letter/editorial) | | high-pressure phengite 40Ar/39Ar laserprobe ages: an example from Saih Hatat, NE Oman C. J. Warren âą...40Ar/39Ar laserprobe phengite data from the Saih Hatat high-pressure terrane in NE Oman show that individual...distributed excess argon. Anomalously old eclogite phengite 40Ar/39Ar ages are due either to internally derived...schists within the eclogite boudins yield younger phengite ages, suggesting excess argon was absent or diluted...grain- and sample-scale age variations measured in Saih Hatat indicate that the grain boundary network in eclogite |  | | Journal (article/letter/editorial) | | from NE Oman Aley El-Din K. El-Shazly ) Department of Earth Sciences, Sultan Qaboos UniĂersity, Oman Received...rocks of the structurally deepest regions of Saih Hatat, NE Oman exhibit an eastward increase in metamorphic...epidote blueschist facies conditions in central Saih Hatat to eclogitic conditions along the eastern coast...Keywords: Eclogites; Blueschists; Thermobarometry; Oman AbbreĂiations: Ab: albite; Ac: aegirine Ćœacmite...omphacite; Oxychl: oxychlorite; Pg: paragonite; Ph: phengite; Phlg: phlogopite; Ps: pistacite; Py: pyrope; |  | | Report (chapter) | | evolution of pre-Permian rocks, Central and Southeastern Oman Mountains A. Mann and S. S. Hanna Geological Society...evolution of pre-Permian rocks, Central and Southeastern Oman Mountains A . M A N N 1 & S. S. H A N N A 2 Earth...Qaboos University, P.O. Box 32486, Sultanate of Oman Abstract: The structural history of pre-Permian...Jebei Akhdar, Jebel Nakhl and Saih Hatat, central and southeastern Oman mountains, is dominated by Late...deformation. The complex internal structure of Saih Hatat is attributed to overprinting of possible Proterozoroic |  | | Journal (article/letter/editorial) | | of the East-Arabian continental margin in the Saih Hatat area: constraints for the palaeogeographic setting...basins (Oman Mountains) Received: 1 September 1998 / Accepted: 18 January 1999 Abstract In Oman, the convergence...sediments, well exposed in the Saih Hatat tectonic window, northeastern Oman Mountains. We attempt to constrain...palaeogeographic setting before ophiolite obduction of the As Sifah units and the Hawasina Complex near Ghurba. Detrital...of As Sifah can be considered as part of the basal deposits of the Hawasina Basin. Key words Oman 7 Chromite |  | | Journal (article/letter/editorial) | | Retrograde evolution of eclogite facies rocks from NE Oman: evidence from fluid inclusions and petrological...Qaboos UniĂersity, P.O. Box 36, Al-Khod PC 123, Oman b Department of Geology and Geophysics, Rice UniĂersity... Abstract Eclogite facies rocks from eastern Saih Hatat ĆœOman., metamorphosed under peak conditions of...most inclusions range from y4 to 08C, but values as low as y138C have been recorded, indicating salinities...Eclogites; Fluid inclusions; Retrogression; Exhumation; Oman 1. Introduction Abbreviations: Ab: albite; Ac: |  | | Journal (article/letter/editorial) | | sodic amphibole-bearing metabasites from north-east Oman ALEY EL-DIN K . EL-SHAZLY* Department of Mineral...section underlying the Semail ophiolite in Saih Hatat, north-east Oman. The pre-Permian basement of this section...empirically and experimentally based thermobarometers as well as petrogenetic grids calculated for a model basaltic...metamorphic grade in central, western and northern Saih Hatat are consistent with the hypothesis relating metamorphism...eclogites exposed along the eastern coast of Saih Hatat which may have formed at an earlier stage in |  | | Journal (article/letter/editorial) | | of Fe-Mg-carpholite-bearing metasediments from NE Oman ALEY EL-DIN K. EL-SHAZLY* Department of Earth Sciences...structurally underlie the Semail ophiolite in NE Oman. In the lower grade, structurally higher units,...carpholite occurs with pyrophyllite, sudoite, phengite and/or chloritoid. Mineral compositions in these...formation of the Fe-Mgcarpholite-bearing rocks of NE Oman range from 280-315" C, 3-6 kbar for the structurally...Key words: carpholite; low-grade metamorphism; NE Oman. Abbreviations Ank, ankerite; Ap, apatite; Arag |  | | Journal (article/letter/editorial) | | Glaucophane chloritoid-bearing assemblages from NE Oman: petrologic significance and a petrogenetic grid...interbeddcd with blueschists and eclogites in Saih Hatat, NE Oman contain chloritoid- and sodic amphibole-bearing...(Ab). A projection from quartz (Qz), H 2 0 and phengite (Ph) on the ( A 1 2 0 3 + F % O a ) - ( F e O...the P - T estimates for high P metapelites from Oman, New Caledonia, Seward Peninsula, Ile de Groix,...observed textural relations in the metapelites of Oman, and is consistent with the "clockwise" P - T path |  | | Journal (article/letter/editorial) | | Eclogites, Blueschists and Epidote Amphibolites from NE Oman: a Record of Protolith Compositional Control and...QABOOS UNIVERSITY, P.O. BOX 36, AL-KHOD PC 123, OMAN 2 DEPARTMENT OF GEOLOGICAL SCIENCES, SOUTHERN...mica schists in NE Oman. These rocks constitute part of the continental margin of Oman subducted during...magnetite; Oxychl, oxychlorite; Pg, paragonite; Ph, phengite; Qz, quartz; Pyrp, pyrope; Rt, rutile; Spess,...and/or greenschists are common in several areas such as Cazadero, California (e.g. Oh et al., 1991), the |
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