Report on Classification of Energy and Mineral Resources and Its Management in the Republic of Tajikistan
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Mineralogy and Geochemistry of Ocelli in the Damtjernite Dykes and Sills, Chadobets Uplift, Siberian Craton: Evidence of the Fluid–Lamprophyric Magma Interaction
minerals Article Mineralogy and Geochemistry of Ocelli in the Damtjernite Dykes and Sills, Chadobets Uplift, Siberian Craton: Evidence of the Fluid–Lamprophyric Magma Interaction Anna A. Nosova 1,*, Ludmila V. Sazonova 1,2, Alexey V. Kargin 1 , Elena O. Dubinina 1 and Elena A. Minervina 1 1 Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences (IGEM RAS), 119017 Moscow, Russia; [email protected] (L.V.S.); [email protected] (A.V.K.); [email protected] (E.O.D.); [email protected] (E.A.M.) 2 Geology Department, Lomonosov Moscow State University, 119991 Moscow, Russia * Correspondence: [email protected]; Tel.:+7-499-230-8414 Abstract: The study reports petrography, mineralogy and carbonate geochemistry and stable iso- topy of various types of ocelli (silicate-carbonate globules) observed in the lamprophyres from the Chadobets Uplift, southwestern Siberian craton. The Chadobets lamprophyres are related to the REE-bearing Chuktukon carbonatites. On the basis of their morphology, mineralogy and relation with the surrounding groundmass, we distinguish three types of ocelli: carbonate-silicate, containing carbonate, scapolite, sodalite, potassium feldspar, albite, apatite and minor quartz ocelli (K-Na-CSO); carbonate–silicate ocelli, containing natrolite and sodalite (Na-CSO); and silicate-carbonate, con- taining potassium feldspar and phlogopite (K-SCO). The K-Na-CSO present in the most evolved Citation: Nosova, A.A.; Sazonova, damtjernite with irregular and polygonal patches was distributed within the groundmass; the patches L.V.; Kargin, A.V.; Dubinina, E.O.; consist of minerals identical to minerals in ocelli. Carbonate in the K-Na-CSO are calcite, Fe-dolomite Minervina, E.A. -
EVIDENCE for MAGMATIC-HYDROTHERMAL ACTIVITY on MARS from Cl-RICH SCAPOLITE in NAKHLA
45th Lunar and Planetary Science Conference (2014) 1620.pdf EVIDENCE FOR MAGMATIC-HYDROTHERMAL ACTIVITY ON MARS FROM Cl-RICH SCAPOLITE IN NAKHLA. J. Filiberto1, C.A. Goodrich2, A.H. Treiman3, J. Gross4, and P.A. Giesting1, 1Southern Illinois University, Geology Dept, Carbondale, IL 62901 USA, [email protected], 2Planetary Science Institute, Tucson AZ 85719 USA. 3Lunar and Planetary Institute, Houston, TX 77058 USA, 4American Museum of Natural History, New York, NY USA. Introduction: Scapolite is a common terrestrial The melt inclusion containing the Cl-scapolite (Fig. hydrothermal, metamorphic, and metasomatic mineral 1) is dominated by high-Ca pyroxene, K-feldspar and which forms by the reaction of plagioclase and a Cl- or K-rich glass, with minor chromite, Fe-sulfides, Fe-Ti CO2-rich fluid [1-3]. It is less common as a primary oxides, and alteration material [9]. The occurrence of igneous phase, but has been reported as megacrysts, the scapolite appears to be texturally equivalent to the phenocrysts, and oikocrysts in alkali-rich basaltic K-feldspar or the glass (i.e., interstitial to the pyrox- magmas [4-6]. Based on reflectance spectra, scapolite enes), and may therefore be replacing, or contempora- has also been suggested to exist on the surface of Mars neous with, one of these phases. It contains ~3.9 wt.% as a possible alteration mineral [7]. Cl, and has the formula (Na2.8Ca0.7K0.3)3.9(Si8.3Al3.7)12ClO24. Scapolite has three main end member composi- It is almost pure end-member marialite with little tions: marialite (Na4Al3Si9O24Cl), meionite meionite component (Fig. 2). -
Sulfate-Rich Scapolite on Mars?
Lunar and Planetary Science XXXVIII (2007) 1152.pdf Sulfate-rich Scapolite on Mars? J.J. Papike, J.M. Karner, and C.K. Shearer Astromaterials Institute, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131 INTRODUCTION also shows selected bonds to neighboring Ca atoms. The surface of Mars shows abundant evidence for This configuration is remarkably stable in P-T space sulfur activity over a prolonged period in martian discussed below. history. Evidence goes back to the Viking landers in STABILITY 1976 but more recent orbital and landed in situ Figure 3 illustrates the stability field of SM [3]. The missions, including the two MER rovers, which are diagram shows that SM can be stable over the still active, confirm this. The identification of the pressure interval ~ 10 to 27 Kb at 1200 degrees C. sulfate jarosite with ferric iron confirms highly This corresponds to a depth interval of ~90 – 243 km oxidizing conditions near the martian surface. We depth in Mars (Fig. 4). In this depth range SM may speculate that conditions oxidizing enough to crystallize if the fO2 is high enough for S to exist as + crystallize a SO4 containing scapolite exist in the 6 . lower martian crust or upper mantle. This scapolite TERRESTRIAL OCCURENCES could be a important reservoir for sulfate in Mars and Terrestrial occurrences of igneous scapolite are might form either directly from sulfur-rich, oxidizing discussed in [2,4, and 5]. Boivin and Camus [4] magmas or by metasomatism of previously discuss a scapolite assemblage found as megacrysts crystallized plagioclase in basalt. -
Report Are Those of the Consultants and Do Not Necessarily Reflect the Position of the Committee of Environmental Protection and Its Agencies, GEF Or UNDP
Tajikistan Terminal Evaluation Atlas Project ID: 00048392; PIMS: 1768 Demonstrating New Approaches to Protected Areas and Biodiversity Management in the Gissar Mountains as a Model for Strengthening the National Tajikistan Protected Areas System Michael J.B. Green & Gulbahor Jumabaeva January 2012 CONTENTS ACKNOWLEDGEMENTS .............................................................................................................. ii ABBREVIATIONS AND ACRONYMS .......................................................................................... iii EXECUTIVE SUMMARY ............................................................................................................... iv 1. INTRODUCTION ................................................................................................................... 1 1.1 Purpose of the evaluation ............................................................................................ 1 1.2 Methodology and structure of the evaluation ............................................................... 1 2. PROJECT DESCRIPTION AND DEVELOPMENT CONTEXT ............................................. 6 2.1 Project start and duration ............................................................................................. 6 2.2 Problems that the project seeks to address ................................................................. 6 2.3 Immediate and development objectives of the project ............................................... 10 2.4 Main stakeholders ..................................................................................................... -
The Economic Effects of Land Reform in Tajikistan
FAO Regional Office for Europe and Central Asia Policy Studies on Rural Transition No. 2008-1 The Economic Effects of Land Reform in Tajikistan Zvi Lerman and David Sedik October 2008 The Regional Office for Europe and Central Asia of the Food and Agriculture Organization distributes this policy study to disseminate findings of work in progress and to encourage the exchange of ideas within FAO and all others interested in development issues. This paper carries the name of the authors and should be used and cited accordingly. The findings, interpretations and conclusions are the authors’ own and should not be attributed to the Food and Agriculture Organization of the UN, its management, or any member countries. Zvi Lerman is Sir Henry d’Avigdor Goldsmid Professor of Agricultural Economics, The Hebrew University of Jerusalem, Israel David Sedik is the Senior Agricultural Policy Officer in the FAO Regional Office for Europe and Central Asia. Contents Executive summary . 1 1. Introduction: purpose of the study. 5 2. Agriculture in Tajikistan. 7 2.1. Geography of agriculture in Tajikistan. 8 Agro-climatic zones of Tajikistan. 10 Regional structure of agriculture. 13 2.2. Agricultural transition in Tajikistan: changes in output and inputs. 15 Agricultural land. 16 Agricultural labor. 17 Livestock. 17 Farm machinery. 19 Fertilizer use. 19 3. Land reform legislation and changes in land tenure in Tajikistan. 21 3.1. Legal framework for land reform and farm reorganization. 21 3.2. Changes in farm structure and land tenure since independence. 24 4. The economic effects of land reform . 27 4.1. Recovery of agricultural production in Tajikistan. -
Project Document Blank
TABLE OF CONTENTS TABLE OF CONTENTS .............................................................................................................................................. 2 LIST OF FIGURES ..................................................................................................................................................... 3 LIST OF TABLES ...................................................................................................................................................... 4 LIST OF ACRONYMS AND ABBREVIATIONS ............................................................................................................. 5 I. DEVELOPMENT CHALLENGE ........................................................................................................................... 8 INTRODUCTION .............................................................................................................................................................. 8 GEOGRAPHICAL CONTEXT ................................................................................................................................................. 8 SOCIO-ECONOMIC CONTEXT ............................................................................................................................................ 10 ENVIRONMENTAL CONTEXT ............................................................................................................................................. 12 KOFIRNIGHAN RIVER BASIN ........................................................................................................................................... -
The Geodynamics of the Pamir–Punjab Syntaxis V
ISSN 00168521, Geotectonics, 2013, Vol. 47, No. 1, pp. 31–51. © Pleiades Publishing, Inc., 2013. Original Russian Text © V.S. Burtman, 2013, published in Geotektonika, 2013, Vol. 47, No. 1, pp. 36–58. The Geodynamics of the Pamir–Punjab Syntaxis V. S. Burtman Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow, 119017 Russia email: [email protected] Received December 19, 2011 Abstract—The collision of Hindustan with Eurasia in the Oligocene–early Miocene resulted in the rear rangement of the convective system in the upper mantle of the Pamir–Karakoram margin of the Eurasian Plate with subduction of the Hindustan continental lithosphere beneath this margin. The Pamir–Punjab syn taxis was formed in the Miocene as a giant horizontal extrusion (protrusion). Extensive nappes developed in the southern and central Pamirs along with deformation of its outer zone. The Pamir–Punjab syntaxis con tinued to form in the Pliocene–Quaternary when the deformed Pamirs, which propagated northward, were being transformed into a giant allochthon. A fold–nappe system was formed in the outer zone of the Pamirs at the front of this allochthon. A geodynamic model of syntaxis formation is proposed here. DOI: 10.1134/S0016852113010020 INTRODUCTION Mujan, BandiTurkestan, Andarab, and Albruz– The tectonic processes that occur in the Pamir– Mormul faults (Fig. 1). Punjab syntaxis of the Alpine–Himalayan Foldbelt The Pamir arc is more compressed as compared and at the boundary of this syntaxis with the Tien Shan with the Hindu Kush–Karakoram arc. Disharmony of have attracted the attention of researchers for many these arcs arose in the western part of the syntaxis due years [2, 7–9, 13, 15, 28]. -
Metasomatic Alteration Associated with Regional Metamorphism: an Example from the Willyama Supergroup, South Australia
Lithos 54Ž. 2000 33±62 www.elsevier.nlrlocaterlithos Metasomatic alteration associated with regional metamorphism: an example from the Willyama Supergroup, South Australia A.J.R. Kent a,),1, P.M. Ashley a,2, C.M. Fanning b,3 a DiÕision of Earth Sciences, UniÕersity of New England, Armidale, NSW, 2351, Australia b Research School of Earth Sciences, The Australian National UniÕersity, Canberra, ACT, 0200, Australia Received 20 October 1998; accepted 12 May 2000 Abstract The Olary Domain, part of the Curnamona Province, a major Proterozoic terrane located within eastern South Australia and western New South Wales, Australia, is an excellent example of geological region that has been significantly altered by metasomatic mass-transfer processes associated with regional metamorphism. Examples of metasomatically altered rocks in the Olary Domain are ubiquitous and include garnet±epidote-rich alteration zones, clinopyroxene- and actinolite-matrix breccias, replacement ironstones and albite-rich alteration zones in quartzofeldspathic metasediments and intrusive rocks. Metasomatism is typically associated with formation of calcic, sodic andror iron-rich alteration zones and development of oxidised mineral assemblages containing one or more of the following: quartz, albite, actinolite±hornblende, andradite-rich garnet, epidote, magnetite, hematite and aegerine-bearing clinopyroxene. Detailed study of one widespread style of metasomatic alteration, garnet±epidote-rich alteration zones in calc-silicate host rocks, provides detailed information on the timing of metasomatism, the conditions under which alteration occurred, and the nature and origin of the metasomatic fluids. Garnet±epidote-bearing zones exhibit features such as breccias, veins, fracture-controlled alteration, open space fillings and massive replacement of pre-existing calc-silicate rock consistent with formation at locally high fluid pressures and fluidrrock ratios. -
The Origin and Evolution of Iskanderkul Lake in the Western Tien Shan and Related Geomorphic Hazards
Geografiska Annaler: Series A, Physical Geography ISSN: 0435-3676 (Print) 1468-0459 (Online) Journal homepage: http://www.tandfonline.com/loi/tgaa20 The origin and evolution of Iskanderkul Lake in the western Tien Shan and related geomorphic hazards Adam Emmer & Jan Kalvoda To cite this article: Adam Emmer & Jan Kalvoda (2017) The origin and evolution of Iskanderkul Lake in the western Tien Shan and related geomorphic hazards, Geografiska Annaler: Series A, Physical Geography, 99:2, 139-154 To link to this article: http://dx.doi.org/10.1080/04353676.2017.1294347 Published online: 24 Mar 2017. Submit your article to this journal Article views: 68 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=tgaa20 Download by: [Charles University in Prague] Date: 31 October 2017, At: 09:12 GEOGRAFISKA ANNALER: SERIES A, PHYSICAL GEOGRAPHY, 2017 VOL. 99, NO. 2, 139–154 http://dx.doi.org/10.1080/04353676.2017.1294347 The origin and evolution of Iskanderkul Lake in the western Tien Shan and related geomorphic hazards Adam Emmer a,b and Jan Kalvodaa aDepartment of Physical Geography and Geoecology, Faculty of Science, Charles University, Prague, Czech Republic; bGlobal Change Research Institute, Academy of Sciences of the Czech Republic, Brno, Czech Republic ABSTRACT ARTICLE HISTORY The origin and evolution of Iskanderkul Lake are studied in relation to Received 26 January 2016 geomorphic hazards within a broader area of interest. It is shown that Revised 20 January 2017 the giant Kchazormech rockslide with its volume of masses of Accepted 22 January 2017 3 approximately 1 km entirely blocked the Iskanderdarja river valley, likely KEYWORDS in the Middle Holocene, impounding thus the palaeolake of Iskanderkul. -
INVESTIGATION of a CAT's-EYE SCAPOLITE from SRI LANKA by K
INVESTIGATION OF A CAT'S-EYE SCAPOLITE FROM SRI LANKA By K. Schmetzer and H. Bank A cut gemstone with intense chatoyancy that Furthermore, hexagonal plates up to 0.4 x 0.4 originated from Sri Lanka was determined to be a mm in size with metallic luster were determined member of the scapolite solid-solution series, Indices to be pyrrhotite in these samples (Graziani and of refraction and unit-cell dimensions were found as Gubelin, 1981). w = 1.583, e = 1.553 and2 = 12.169, = 7.569 A, This article describes a scapolite crystal from respectively; a meionite content of 69% was Sri Lanlza that was cut into a 1.68-ct cabochon established by microprobe analysis. The chatoyancy (approximately 9 mm x 5 mm) with particularly is caused by needle-like inclusions with an orientation parallel to the c-axis of the scapolite host intense chatoyancy (figure 1). The ray of light crystal. Microprobe analysis of these needles showed crossing the surface of the cabochon is relatively them to be pyrrl~otite. broad compared to the sharpness of rays in other gemstones with chatoyancy or asterism, such as the more familiar cat's-eye chrysoberyls or aste- riated corundum. The physical and chemical properties of this cat's-eye scapolite are pre- Natural scapolites are members of the solid- sented, and the cause of the distinctive chatoy- solution series marialite, Nag[(C12,S04,C03)1 (A1 ancy in this stone is explained. Si308)e],and meionite, CadClaSO+C03) (A12 1 PHYSICAL AND CHEMICAL PROPERTIES Si20g)g].Scapolite crystals of gem quality occur colorless and in white, gray, yellow, pink, and A small facet was cut and polished on the bottom violet. -
Volume 23 / No. 7 / 1993
Volume 23 No. 7. July 1993 1116 Journal of Gemmology THE GEMMOLOGICAL ASSOCIATION AND GEM TESTING LABORATORY OF GREAT BRITAIN OFFICERS AND COUNCIL Past Presidents: Sir Henry Miers, MA, D.Sc., FRS Sir William Bragg, OM, KBE, FRS Dr. G.F. Herbert Smith, CBE, MA, D.Sc. Sir Lawrence Bragg, CH, OBE, MC, B.Sc, FRS Sir Frank Claringbull, Ph.D., F.Inst.P., FGS Vice-Presidents: R. K. Mitchell, FGA A.E. Farn, FGA D.G. Kent, FGA E. M. Bruton, FGA, DGA Council of Management CR. Cavey, FGA T.J. Davidson, FGA N.W. Deeks, FGA E.A. Jobbins, B.Sc, C.Eng., FIMM, FGA I. Thomson, FGA V.P. Watson, FGA, DGA R.R. Harding, B.Sc., D.Phil., FGA, C. Geol. Members' Council A. J. Allnutt, M.Sc, G.H. Jones, B.Sc, Ph.D., P. G. Read, C.Eng., Ph.D., FGA FGA MIEE, MIERE, FGA, DGA P. J. E. Daly, B.Sc, FGA J. Kessler I. Roberts, FGA P. Dwyer-Hickey, FGA, G. Monnickendam R. Shepherd DGA L. Music R. Velden R. Fuller, FGA, DGA J.B. Nelson, Ph.D., FGS, D. Warren B. Jackson, FGA F. Inst. P., C.Phys., FGA CH. Winter, FGA, DGA Branch Chairmen: Midlands Branch: D.M. Larcher, FBHI, FGA, DGA North-West Branch: I. Knight, FGA, DGA Examiners: A. J. Allnutt, M.Sc, Ph.D., FGA G. H. Jones, B.Sc, Ph.D., FGA L. Bartlett, B.Sc, M.Phil., FGA, DGA D. G. Kent, FGA E. M. Bruton, FGA, DGA R. D. Ross, B.Sc, FGA C R. -
Rubies and Sapphires from Snezhnoe, Tajikistan
FEATURE ARTICLES RUBIES AND SAPPHIRES FROM SNEZHNOE , T AJIKISTAN Elena S. Sorokina, Andrey K. Litvinenko, Wolfgang Hofmeister, Tobias Häger, Dorrit E. Jacob, and Zamoniddin Z. Nasriddinov Discovered during the late 1970s, the Snezhnoe ruby and sapphire deposit in Tajikistan was active until the collapse of the former Soviet Union in the early 1990s and the outbreak of regional conflicts. This marble-hosted occurrence has seen renewed interest, as it is a large and potentially productive deposit that has not been sufficiently studied. Testing of samples identified solid inclusions of margarite enriched with Na and Li (calcic ephesite or soda margarite). These are believed to be previously unreported for gem corundum. Allanite, muscovite, and fuchsite (chromium-bearing muscovite) were identified for the first time in ruby and sapphire from Snezhnoe. These and other inclusions such as zircon, rutile, K- feldspar, and Ca-Na-plagioclase could serve to distinguish them from stones mined elsewhere. Con - centrations of trace elements were typical for ruby and sapphire of the same formation type. The highest Cr concentrations were observed within the bright red marble-hosted rubies, and these values were very similar to those of the famous Burmese rubies from Mogok. orundum— -Al O —is a common, though net, scapolite, lazurite, and variscite (Litvinenko α 2 3 minor, component of many metamorphic and Barnov, 2010). The occurrence of ruby in the Crocks. Gem-quality varieties of ruby and sap - Pamirs was first suggested by the Soviet mineralo - phire occur in only a few primary metamorphic and magmatic rock types depleted in silica and enriched Figure 1.