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Ulaanbaatar, Mongolia

The Mongolian University of Science and Technology , often referred to as MUST; Mongolian: Шинжлэх Ухаан, Технологийн Их Сургууль, was founded in 1969 as a part of of the National University of Mongolia with 5 faculties and 13 departments and named as the Polytechnic Institute. The Mongolian University of Science and Technology, one of the Leading State Universities of the country, is situated on its extensive campuses in Ulaanbaatar City, Darkhan, Erdenet, Uburkhangai, and Sukhbaatar provinces. Among universities of technology and science in Asia, it was placed the 7th in 2002.It is also one of the largest centers for scientific and cultural exchanges in Mongolia. Approximately two third of the academically educated Mongolians have graduated from MUST. Wikipedia.

Webb L.E.,University of Vermont | Johnson C.L.,University of Utah | Minjin C.,Mongolian University of Science and Technology

Tectonic studies of the East Gobi Fault Zone in southeastern Mongolia reveal multiple, distinct intracontinental deformation events postdating late Paleozoic arc accretion and continental amalgamation. Metamorphic tectonites of the Tsagan Subarga and Tavan Har blocks, previously mapped as Precambrian basement, comprise a sinistral shear zone dominated by steeply-dipping, northeast-striking foliations. Field observations and petrographic analyses indicate that the protoliths of the metamorphic tectonites are Paleozoic arc volcanic and sedimentary sequences. 40Ar/39Ar step-heating analyses of minerals from pre-, syn-, and late- to post-kinematic lithologies bracket the timing of ductile sinistral shear as Late Triassic. The main phase of distributed deformation associated with cooling through amphibolite-upper greenschist-facies conditions occurred ca. 225Ma and shear zone activity waned ca. 210Ma. Cooling rates inferred from the 40Ar/39Ar data are on the order of 40-20°C Myr-1; apparent differences for the two basement blocks may reflect subsequent differential uplift during Late Jurassic-Cretaceous rifting. Relatively rapid Late Triassic cooling suggests a transtensional component to the deformation and is coincident with core complex formation in northern China. Late Triassic intraplate deformation in southeastern Mongolia is likely the result of far field forces associated with collision between Mongolian arcs and the Siberian craton (i.e. closure of the Mongol-Okhotsk ocean) and/or collisions associated with closure of the Paleotethys. The ductile shear zone has been documented over 250km along strike and has been modified by subsequent brittle deformation events in the Mesozoic and Cenozoic. © 2010 Elsevier B.V. Source

Batkhishig B.,Mongolian University of Science and Technology | Noriyoshi T.,Tohoku University | Greg B.,Institute of Geological & Nuclear Sciences
Journal of Asian Earth Sciences

The Carboniferous Shuteen Complex, a volcano-plutonic ring complex associated with Cu-Au porphyry mineralization, is located in the Gurvansaikhan island arc terrane of South Mongolia. This paper presents new data on the petrography, major and trace element chemistry, and Sr-Nd isotopic chemistry of the Shuteen Complex. We discuss the relationship between volcanic and plutonic rocks of the complex, and consider their similarity to high-Al2O3 trondhjemite-tonalite-granodiorite and adakites. We also consider the origin, magma source, and dynamic processes of the Shuteen Complex; propose a petrogenetic model; and investigate the composition of the subducting slab and the features of arc volcanism at the time. We assess some of the magmatic processes likely to have occurred within the Shuteen Complex, such as Carboniferous slab subduction and partial melting, and examine their influence on magma composition. The Shuteen Complex is geochemically similar to adakite-type rocks. The complex is silica-saturated (SiO2 ≥ 56%), rich in Al2O3 (≥15%), MgO (<6%), Y (≤18 ppm), and Yb (≤1.9 ppm), depleted in heavy rare earth elements, rich in Sr (>400 ppm), and depleted in high field strength elements. It also has a high Sr/Y value, and (87Sr/86Sr)I < 0.7040. The Shuteen Pluton yields a well-defined isochron age of 321 ± 9 Ma, whereas the age of the Shuteen andesites is 336 ± 24 Ma. The Shuteen Complex formed within an island arc setting, and partial melting was the dominant process during petrogenesis. The primary Shuteen magma had an adakitic composition and was probably derived from the partial melting of subducting oceanic crust, possibly with minor local interaction with mantle material. The results of quantitative modelling of mass balance and partial melt equilibrium for the magma source indicate that the subducting slab contained oceanic basalt and a minor component of oceanic sediment, which together with a restite eclogite phase formed the source of the Shuteen magma. The conclusive results of this study provide new insights into the magmatic evolution of the Shuteen Complex. © 2009 Elsevier Ltd. All rights reserved. Source

Hunt A.C.,Open University Milton Keynes | Parkinson I.J.,Open University Milton Keynes | Harris N.B.W.,Open University Milton Keynes | Barry T.L.,Open University Milton Keynes | And 3 more authors.
Journal of Petrology

Cenozoic volcanism within Mongolia forms part of a large central Asian province of intra-plate magmatism. Numerous small-volume volcanic cones and alkali basalt lava flows have been formed since c. 30 Ma; from c. 12 Ma activity has been focused on the uplifted Hangai dome. A mechanism for melting beneath the dome has, however, thus far remained enigmatic. Some of the oldest basalts on the Hangai dome erupted at its centre at ∼6 Ma and their geochemistry suggests a garnet lherzolite source region at 90-100 km depth. These lavas have Pb isotope compositions similar to those of depleted Indian mid-ocean ridge basalts (MORB) ( 206Pb/ 204Pb = 17·822, 207Pb/ 204Pb = 15·482, 208Pb/ 204Pb = 37·767), which may be indicative of the involvement of ambient asthenospheric mantle in their petrogenesis. Younger basalts exhibit a gradual shift in isotopic composition towards a source that has less radiogenic Pb and more radiogenic Sr, evidenced by the eruption of lavas with 206Pb/ 204Pb = 16·991 and 87Sr/ 86Sr = 0·704704. The youngest lavas, dated as younger than ∼8 ka, have the highest K 2O contents (up to 5·2 wt %) and are characterized by the most enriched trace-element signatures; they are interpreted to represent melting of a metasomatically altered sub-continental lithospheric mantle containing phlogopite. Concurrent with progressive melting of the lithosphere, melting appears to propagate outwards from the centre of the dome to its margins; by 0·7 Ma the marginal magmatism is interpreted to result from melting of a depleted MORB-source mantle component with a smaller contribution from the lithospheric mantle. The spatial and temporal variations in melting beneath the Hangai dome may be explained by either lithospheric delamination or the presence of a small-scale thermal anomaly in the upper mantle. Although it is not possible to distinguish between these models on the basis of geochemistry alone, the lack of a viable mechanism to generate small-scale upwelling lends support to a model involving delamination of the lithospheric mantle beneath the Hangai dome. © The Author 2012. Published by Oxford University Press. All rights reserved. Source

Obikane Y.,Mongolian University of Science and Technology
Procedia Engineering

We studied a stable pilot flame system for a cannon type combustor of turbo-engines by adding both a frontchamber and a pilot flame chamber with an electric ignition system to the conventional two-stage system with two-stage combustion domains: a primary zone and a secondary zone. The electric ignition period was about 1 second with 2760V(theoretical) generated by Kochcroft-Welton circuit, and the fuel was butane gas. The inlet was 25m/sec and the pressure was about 400Pascal at the inlet of combustor.We set two cases for the outlet configuration: a converging nozzle and a turbine. The outlet temperature was 280C at the outlet velocity of 25m/sec, and the temperature was 230C at the outlet velocity of 12m/sec. A sufficiently large rotational speed and torque was obtained to rotate the compressor and fan of the turbine. Weanalyzed the ignition mechanism by solving two dimensional compressible Navier-Stokes equations and found that the role of the front chamberwas to maintain the pilot flame after the ignition shock. We confirmed experimentally that this system can ignite and preserve a stable pilot flame with quite high probability. © 2015 The Authors. Source

Batkhishig B.,Mongolian University of Science and Technology | Noriyoshi T.,Tohoku University | Bignall G.,Resources Group
Economic Geology

The Shuteen area is located in the Gurvansaikhan island arc terrane of South Mongolia. It contains a large domain of intensely developed silicic and advanced argillic alteration that has strongly affected the adakitic volcanoplutonic Shuteen Complex. The local occurrence of low-grade copper mineralization within porphyritic intrusive rocks is indicative of porphyry-style mineralization. Hydrothermal quartz veins host gold mineralization locally. The results of scanning electron microscope-cathodoluminescence imaging and fluid inclusion microthermometry indicate that the veins and altered rocks at Shuteen were produced by multiple hydrothermal events. The occurrence of CO2 inclusions in quartz from granitoids and the δ34S values obtained for sulfide and sulfate within the hydrothermal breccias provide evidence of the involvement of magmatically derived fluids in the early stages of the Shuteen magmatic-hydrothermal system, inferred to be sourced from a porphyry-style intrusive center. Late-stage fluids produced abundant barren quartz veins and clay alteration assemblages. The weak mineralization and widespread alteration in the Shuteen Complex are typical of lithocaps found in high-level porphyry copper-(gold-molybdenum) and high sulfidation epithermal districts. The present-day erosion level at Shuteen is relatively shallow, implying that economic porphyry-style mineralization may exist at depth within or beneath the Shuteen lithocap. ©2014 Society of Economic Geologists, Inc. Source

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