 | | Journal (issue) | | April 1998 ISSN: 1355-4565 Distinctive gem corundum suites from discrete basalt fields: a comparative...with variable relative intensities. Keywords: corundum, sapphire, ruby, sapphirine, absorption spectra...Introduction Fast Australia and South East Asia exploit rich corundum deposits from ⢠/ their basalt fields...and Townsend, 1990; Sutherland, 1991), while SE Asia produces both sapphire and ruby in abundance (Vichit...(Vichit, 1992). In this paper we describe corundum suites from two widely separated basalt fields, Barrington |  | GORDON, S. M., LUFFI, P., HACKER, B., VALLEY, J., SPICUZZA, M., KOZDON, R., KELEMEN, P., RATSHBACHER, L., MINAEV, V. (2012) The thermal structure of continental crust in active orogens: insight from Miocene eclogite and granulite xenoliths of the Pamir Mountains. Journal of Metamorphic Geology, 30 (4) 413-434 doi:10.1111/j.1525-1314.2012.00973.x | Journal (article/letter/editorial) | | Miocene eclogite and granulite xenoliths of the Pamir Mountains S. M. GORDON,1* P. LUFFI,2 B. HACKER,1 J. VALLEY...crustal xenoliths erupted at 11 Ma in the Pamir Mountains, southeastern Tajikistan, preserve a compositional...melting. The extraction depths exceed the present-day Pamir Moho at 65 km depth and suggest an average thermal...xenoliths; granulite xenoliths; oxygen isotopes; Pamir; partial melting. INTRODUCTION The thermal structure...suite of Miocene xenoliths erupted in the Pamir Mountains of Tajikistan consists of eclogites and * Present |  | Litvinenko, Andrey K., Sorokina, Elena S., Häger, Tobias, Kostitsyn, Yuri A., Botcharnikov, Roman E., Somsikova, Alina V., Ludwig, Thomas, Romashova, Tatiana V., Hofmeister, Wolfgang (2020) Petrogenesis of the Snezhnoe Ruby Deposit, Central Pamir. Minerals, 10 (5) 478 doi:10.3390/min10050478 | Journal (article/letter/editorial) | | Petrogenesis of the Snezhnoe Ruby Deposit, Central Pamir Andrey K. Litvinenko 1 , Elena S. Sorokina 2,3 ...anticlinorium within the Cimmerian zone of the Central Pamir. On the local scale, the deposit occurs on discrete...These values are characteristic for metamorphic corundum. The bulk ruby-bearing rocks have an initial 87...geochemistry; Snezhnoe deposit; Tajikistan; Central Pamir; MuzkolâRangkul anticlinorium; in situ UâPb LAâICPâMS... Minerals 2020, 10, 478 2 of 22 1. Introduction Corundum (Îą-Al2 O3 ) is the aluminum end-member of the |  | Grew, Edward S., Pertsev, Nikolai N., VrĂĄna, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 | Journal (article/letter/editorial) | | At the sixth locality (Mulvoj, southwestern Pamir Mountains, Tajikistan), Krn is found in the same thin...arc, Zambia and Mulvoj in the southwestern Pamir Mountains, Tajikistan; and assess chemical factors that...constitute a stable mineral assemblage Mulvoj, SW Pamir, Tajikistan Lens 1 prograde: Krn + Phl + Ath + Qtz...Barr (1972, Table 1) Zambia Southwestern Pamir Mountains, Tajikistan Kuhi-lal KL604 Âą 2 Darai Stazh...Chlorite (Chl)b Cordierite (Crd) Sapphirine (Spr) Corundum (Crn) Spinel (Spl) Hematite (Hem) Rutile (Rt) |  | | Report (issue) | | 28.33 0.33 . 99.58 100.28 100.00 (1) âSouth East Asiaâ; corresponds to Mg1.00(Al1.97Mg0.02Fe0.01Zn0.01)ÎŁ=2...Forsterite, chondrodite, scapolite, phlogopite, corundum, sillimanite, andalusite. Distribution: Many localities...Shield, Sakha, Russia. At Gorondarinskoye, Pamir Mountains, Tajikistan. Name: Perhaps from the Latin spinella |  | | Journal (article/letter/editorial) | | range of environments and conditions involved in corundum (Al2O3) formation. We compiled a global data base...Orogeny) and the Cenozoic collision of India and Asia. Received 3 May 2017 Accepted 3 May 2017 Introduction...Introduction Sapphire and ruby are gem varieties of corundum (ÎąAl2O3): rubies are red, and sapphires are any...et al. 2013). These gems are concentrated in SE Asia (Yui et al. 2006; Khamloet et al. 2014; Zaw et al...Rakotosamizanany et al. 2014). Geochemical investigations of corundum are somewhat restricted in scope because only |  | | Journal (issue) | | INSTITUTE OF AMERICA Dual-Color Double Asterism in Corundum and Quartz Photomicrography Techniques and Equipment...and Value of Inclusions, Plus Double Stars and Corundum from Tajikistan Duncan Pay FEATURE ARTICLES pg...optical phenomenon in synthetic and possibly natural corundum since the 1950s. 144 Digital Photomicrography...marble-hosted occurrence in the Pamir Mountains is a potentially productive source of corundum, including ruby with...and Value of Inclusions, Plus Double Stars and Corundum from Tajikistan We hope you enjoy this editionâs |  | | Journal (issue) | | colored stoneâproducing regions included: Southeast Asia (Myanmar, Thailand, and Vietnam), Africa (Tanzania...America (Brazil and Colombia), central and southern Asia (Sri Lanka, India, Afghanistan, Pakistan, Russia...gem-producing regions (southern Africa, South Asia, Southeast Asia, Australia, South America). Although there...at the historic emerald mines in Russiaâs Ural Mountains (e.g., Schmetzer et al., 1991), but these mines...production of red beryl (figure 4) from the Wah Wah Mountains in southern Utah. Due to its dramatic red color |  | | Journal (issue) | | Cover photo: Spinel from Kuh-i-Lal, in the Pamir Mountains of Tajikistan, has a long history and has been...IVY New York. ARTICLES 138 Spinel from the Pamir Mountains in Tajikistan By Dietmar Schwarz, Yicen Liu...2016. Spectroscopic study of inclusions in gem corundum from Mercaderes, Cauca, Colombia. Physics and...and pink sapphires from other deposits in Central Asia. Gemological Institute of America, Bangkok, Thailand...Named the âSerendipity Sapphireâ (initally âQueen of Asiaâ), the specimen was inspected by Sri Lankan gemmologist |  | | Journal (issue) | | still unnamed but very promising prospect in mountains near Pisco, probably not far away from the Lily...brownish-orange specimens have come from the Pamir mountains of Tajikistan. A new occurrence has been discovered...from both localities. Keywords: clinohumite, Pamir mountains, Siberia, physico-chemical properties, internal...quality is known from an occurrence in the Pamir mountains of Tajikistan, former Soviet Union (Anderson...028 and 0.041. SG ranges from 3.21 to 3.35. Pamir mountains Hitherto, the best known clinohumite occurrence |  | Giuliani, Gaston, Fallick, Anthony E., Boyce, Adrian J., Pardieu, Vincent, Pham, Van Long (2017) Pink and Red Spinels In Marble: Trace Elements, Oxygen Isotopes, and Sources. The Canadian Mineralogist, 55 (4) 743-761 doi:10.3749/canmin.1700009 | Journal (article/letter/editorial) | | important source of gem spinel from Asia and East Africa (Fig. 2). In Asia, the main primary deposits are...conditions. The main equilibrium reaction between corundum and spinel during prograde metamorphism is the...Spl Ăž Cal Ăž CO2. This reaction explains why gem corundum and spinel are generally not associated in the...despite the description of grey and blue spinels in corundum-bearing skarn formed upon marble (Silva & Siriwardena...synthetic standards used were Mg (olivine), Al (corundum), Fe (hematite), Ti and Mn (manganese titanite) |  | | Journal (article/letter/editorial) | | contains occurrences of the gemstones sapphire (corundum), spinel (including vivid blue, cobalt-enriched...(syenogranite or gneiss) and marble. The metasedimentary corundum, spinel, and haĂźyne occurrences have similar protoliths:...exploration, remote sensing 1. Introduction Gem-quality corundum (Al2O3), spinel (MgAl2O4), and lapis lazuli (a...pale to deep blue, colorless, and medium yellow corundum (sapphire) occurs in scapolite-rich calc-silicate...m) to a similar calc-silicate pod devoid of any corundum (âBowheadâ), and determined that the final retrograde |  | | Journal (issue) | | important source of gem spinel from Asia and East Africa (Image 4). In Asia, the primary deposits of spinel...conditions. The main equilibrium reaction between corundum and spinel during prograde metamorphism is the...(Equilibrium 1). This reaction explains why gem corundum and spinel are generally not associated in the...Occurrences and deposits of pink and red gem spinel in Asia. Image 5. Location of spinel deposits from the...area in the Yunnan province), spinel is without corundum or together with ruby in marble (Okrush et al |  | | Journal (issue) | | sapphire, Sri Lanka; (12) 5.79-ct pink spinel, Pamir Mountains, USSR; (13) 10.15-ct pink topciz, Pakistan;...alexandrites from Brazil, sapphires from Southeast Asia and Australia, emeralds from Colombia and Zambia...(Emerald) Beryl Chrysoberyl (Q I @ Corundum (Ruby) Corundum (Sapphire) Diamond <ä Garnet 0 Jade...gem beryls. Commercial mining in the Wah Wah Mountains of Utah, begun in the late 1970s, continued sporadically...decade is available. CORUNDUM Ruby. The classic ruby occurrences of Southeast Asia (i.e., Mogolz, Burma |  | | Book | | PetrogenesisoftheSnezhnoeRubyDeposit,CentralPamir Reprinted from: Minerals 2020, 10, 478, doi:10.3390/min10050478...Australia, New Zealand, China and many parts of SE Asia (Vietnam, Laos, Cambodia, Malaysia, Thailand, Indonesia...from the SE Asia region. He leads industry-CODES-funded projects on the Ore Deposits of SE Asia. He is currently...studies, namely ruby, the red-colored gem variety of corundum. The color results from a sufďŹciency of the trace...Wang, K.; Tarantola, A.; Zaw, K.; Meffre, S. Gem corundum deposits of Greece: Geology, Mineralogy and Genesis |  | Grew, Edward S., Yates, Martin G., Konilov, A.N., Marquez, Nicholas (1992) Kornerupine from the Archaean Kola Series at Sholt-Yavr, Kola Peninsula, Russia. Mineralogical Magazine, 56 (383) 247-251 doi:10.1180/minmag.1992.056.383.12 | Journal (article/letter/editorial) | | Precambrian crystalline rocks of the southwestern Pamir Mountains at Darai Stazh and Mulvoj (Levitskiy et al...5) contains minor K-feldspar, sillimanite and corundum in addition to the minerals in the schist at 152...cordierite and in biotite adjacent to sapphirine. Corundum forms grains less than 1 mm across in biotite...the most aluminous assemblage with sillimanite + corundum in 15/ 221.5. Decrease in Fe2+/Mg ratio of this |  | GREW, E. S., PERTSEV, N. N., YATES, M. G., CHRISTY, A. G., MARQUEZ, N., CHERNOSKY, J. V. (1994) Sapphirine+Forsterite and Sapphirine+Humite-Group Minerals in an Ultra-Magnesian Lens from Kuhi-lal, SW Pamirs, Tajikistan: Are these Assemblages Forbidden?. Journal of Petrology, 35 (5) 1275-1293 doi:10.1093/petrology/35.5.1275 | Journal (article/letter/editorial) | | Precambrian amphibole-facies rocks at Kuhi-lal, SW Pamir Mountains, Tajikistan, a locality also for talc + kyanite...Al-rich minerals such as cordierite, sillimanite, corundum, and spinel, as well as with two minerals relatively...36°FIG. 2. Geologic map of the southwestern Pamir Mountains, Tajikistan, and of Badakhshan (NE Afghanistan)...fine-grained cordierite, plagioclase, sapphirine, and corundum after decompression. In the case of sample KL920A...(1990) estimate of 850 °C, 5 kbar for the Napier Mountains, Antarctica (Table 1), is not inconsistent with |  | | Journal (issue) | | elsewhere, Resa uti utiEuropa, Europa,Africa, Africa,Asia Asia... . .. 1770-1779, published in Uppsala, Sweden...river in the island of Ceylon. It flows from high mountains which are in the middle of the island, and as...alluvial gemstone than the ruby or sapphire. The corundum crystals of these gravels commonly display small...second order prisms and the bipyramid but not of a corundum Gemm., 1991,22,8 J. Gemm, 1991,22,8 467 crystal...are utilized here (Klaproth, 1801). Thus, on on corundum, or "oriental sapphire", sapphire'~ Klaproth disputes |  | | Journal (issue) | | detecting the presence of beryllium diffusion in corundum. REGULAR FEATURES _____________________ 323 ...Chalcedony from Iran ⢠Clinohumite from Tajikistan ⢠Corundum-fuchsite-kyanite rock from India ⢠Cristobalite...molybdenite ⢠Rutile âmothâ in quartz ⢠Synthetic corundum with unusual color zoning ⢠Imitation clam âpearlâ...suite from the peridot deposit in the Himalaya Mountains of Pakistan to the manufacture of the pieces at...Gem Characterization Techniques ⢠Diamond and Corundum Treatments ⢠Laboratory Growth of Gem Materials |  | | Book | | Rocks Beryl Topaz Tourmaline Feldspars Rutile Corundum-Ruby .... Chrysoberyl Spodumene (Triphane) Garnets...Cinnabar 68 Cooper arsenates . . . .100 Crocoite 84 Corundum/Ruby 32 Cumengeite 94 Crysoberyl 34 Cuprite 92...be found embedded in quartz crystals. CorundumâRuby Corundum is aluminum oxide crystallized in a double...because of its high density and extreme hardness, corundum is particularly common in alluvial deposits on...is extracted by panning. 1 - Corundum (Madagascar): 5 cm. 2 - Corundum/Ruby (Jegdalek, Afghanistan): |  | | Journal (issue) | | was in Myanmar. Production at various Burmese corundum mines slowed considerably in the latter part of...This not only created worldwide shortages of gem corundum, but it also proved devastating to Thailandâs...industry (Shor and Weldon, 2009). One new source of corundum, Winza in Tanzania, began yielding some fine-quality...ruby, or was assembled from multiple pieces of corundum); and (2) how to describe it, with terms such...representatives from major gem labs in Europe, the U.S., and Asia) issued a statement supporting the use of the term |  | | Journal (article/letter/editorial) | | Barite associated with fluorite from Buckskin Mountains in Arizona fluoresces weak red under short wave...and various traprockquarries in the Watchung mountains of New Jersey. Yellow ish white fluorescing calcite...fluorescent minerals common to both include calcite, corundum, fluoborite, pargasite, diopside, fluorapatite...fluorescence, if any, has not been reported, Corundum Pink corundum is found in the Franklin marble in the...with fluorescing margarite at Sterling Hill. This corundum fluoresces bright red under long wave ultraviolet |  | | Journal (issue) | | 1991; Kammerling et al., 1994). Yet, significant corundum deposits have also been found in southern Vietnam...to that of alkali basalts elsewhere in Southeast Asia and China, such as Mingxi in Fujian Province (Keller...The volcanic activity in Southeast Asia that brought the corundum-bearing allzali basalts to the surface...Cenozoic time (since about 37 My ago), Southeast Asia experienced block faulting as a result of regional...with basalts but also with sediments, including corundum, derived from the weathering of rock formations |  | | Journal (issue) | | reportedly from the Kuh-iLal deposit in the Pamir Mountains of Tajikistan. p. 330 REGULAR FEATURES 337...pink spinel reportedly from Kuh-i-Lal in the Pamir Mountains of Tajikistan. To determine the cause of color...Diopside-augite Coesite Kyanite Coesite â Olivine Corundum Rare Ilmenite Graphite (primary) Coesite ...Harlow G.E., Bender W. (2013) A study of ruby (corundum) compositions from the Mogok Belt, Myanmar: Searching...(2011) Geographical origin classification of gem corundum using elemental fingerprint analysis by laser |  | | Journal (issue) | | north and on a clear day you can spy the jungle mountains of Myanmar (Burma). Both China and Vietnam lurk...discovered nin (black spinel, an accessory mineral of corundum) at Chiang Khong (Huay Xai), which lies just across...Deposit near Ban Houei Xai, Bokeo Province, Lao. Asia Sapphires Limited, unpublished company report; 18...Koloskov, A.V. (2005) Cenozoic volcanism of Southeast Asia. Petrology, Vol. 13, No. 4, pp. 352â380. Hughes...(1978) The distribution and some characteristics of corundum-bearing basalts in Thailand. Journal of the Geological |
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Ab-i-Panja, Ishkashim District, Badakhshan, Afghanistan