 | | Journal (article/letter/editorial) |
| Harris Syngenetic inclusions in diamond from the Birim Ā®eld (Ghana) Ā± a deep peridotitic proĀ®le with...inclusions from placer deposits (Akwatia mine) along the Birim River, Ghana were studied, thus providing...contents indicate an almost exclusively peridotitic diamond suite, with the vast majority being part of the...harzburgitic paragenesis. Chemically the Akwatian diamond inclusions diĀer from those in our 1100 sample...(66.4 mol%) so far observed in an inclusion in diamond. The same garnet also contained a minor enstatite |
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| Ver' "\ ~~ ā¢ THE MINERAL AND ROCK RESOURCES OF GHANA f btYON RALPH Dedicated to my parellfs for not...ISBN 90 6191 597 X paper edition only for sale in Ghana Ā© 1985 A.A.Balkema, P.O.Box I 675, 3000 BR Rotterdam...REPUBLIC OF GHANA- GEOGRAPHY,PHYSIOGRAPHY,GEOLOGY AND GEOHYDROLOGY 6 3. THE MINERALRESOURCESOF GHANA - BACKGROUND...EXPLOITATION IN GHANA 572 12. TABLES OF SUMMARY OF MINERAL AND ROCK RESOURCESOF GHANA 577 13. LEGISLATION...590 APPENDIX 597 INDEX 602 V Preface The Ghana Geological SuJ;"vey DepaJ;"tment in 1.962, published |
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| 0 Ga) and hence an unconventional setting for diamond exploration. Buffalo Hills diamonds formed during...2006 Elsevier B.V. All rights reserved. Keywords: Diamond inclusions; Carbon isotopes; Nitrogen aggregation;...Majorite; Off-craton 1. Introduction Traditionally diamond exploration has focused on cratons stabilized in...an empirically derived association of primary diamond deposits with Archean cratons as summarized by...in the discovery of the Buffalo Hills kimberlite field in northern Alberta. It was discovered in 1997 by |
 | | Journal (article/letter/editorial) |
| confirmed by the presence of secondary enstatite-augite and albite crystals. Key WordsāAsh Fall Level,...large intracratonic basin located in the central eastern part of the South America Platform (Figure 1)....the states of GoiaĢs and Mato Grosso). In this region, the dolostone levels of the AssisteĢncia Member...talc. long, euhedral pyroxene crystals (enstatite-augite) dispersed in the matrix (Dos Anjos, 2003). Accessory...(Figure 7a). The 3675 cm 1 band (OH-stretching region, Figure 8) indicates the presence of 3Mg-OH groups |
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| the source of carbon for the crystallization of diamond. Considering the large variations in mineral chemistry...Hole Oceanographic Institute. A well-calibrated augite megacryst (KH-1) from alkali basalt was used as... These conditions are well inside the diamond stability region, and are close but slightly below the...affect the REE concentrations in cpx at the diamond stability region: the bulk REE concentrations in the host...cpx has not been entirely molten in the diamond stability region, cpx and garnet are the two main REE repositories |
 | Wang, Wuyi, Sueno, Shigeho, Takahashi, Eiichi, Yurimoto, Hisayoshi, Gasparik, Tibor (2000) Enrichment processes at the base of the Archean lithospheric mantle: observations from trace element characteristics of pyropic garnet inclusions in diamonds. Contributions to Mineralogy and Petrology, 139 (6) 720-733 doi:10.1007/s004100000163 | Journal (article/letter/editorial) |
| REE in garnets changed signiĀ®cantly from diamond to diamond and no speciĀ®c correlations were observed...and multiple grains of one phase from a single diamond host also exhibit very similar compositions. This...grain or among multiple inclusions from the same diamond host, as reported from Siberian diamonds, is not...greater depths, well into the stability Ā®eld of diamond. In terms of the major element composition, it...extract all inclusions of various sizes from the diamond eĀciently and safely without causing any alteration |
 | | Report (issue) |
| to the most highly p1Ā·ized varieties of pearl., diamond, emerald, ruby, sapphire and precious or '' noble...power and '' fire '' to high dispersive power. Diamond, for instance, possesses both these properties...exceeds that of any other gemstone, and a faceted diamond displays all the colours of the rainbow when viewed...n11rn ber of stones m,a rketed in the c.ase o,f diamond is strictly limited by the producers. Emerald,...' U ralian emerald," '' Cape ruby," '' Matura diamond," and a host of others have been applied to such |
 | | Journal (article/letter/editorial) |
| twinned diamonds, framesite. or polycrystalline diamond aggregates, are found. They are associated with...content and aggregation state, as well as the diamond inclusion parageneses and inclusion composition... W. Harris, and J. J. Gurney Table 1. Jwaneng diamond characteristics and analytical data. Sa JW JW...E P P P P E P P P E P P P P P? P? P? P P P Diamond 6~3C, nitrogen content, and inclusion chemistry...Comparison of ~ 13C Frequency Distributions of Diamond Classified by Inclusion Mineralogy The 613C sampling |
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| 20 Three-Stage Growth Model of the Natural Diamond of Octahedral Habit. 23 Petrography and mineralogy...Experimental Study of Growth and Resorption of Diamond in Kimberlitic Melts at High Pressures and Temperatures...crystalline inclusions and the real structure of diamond. Morphology and Composition of Chromite Macrocrysts...Inclusions, Guaniamo Kimberlite Field, Venezuela. Primary and related diamond occurrences within a Phanerozoic...Phanerozoic subduction regime in eastern New South Wales, Australia. Mantle Dynamics beneath Mongolia: Implications |
 | | Report (issue) |
| Supervisor, Cartography Section PAUL W. BAUER, Field Economic Geologist LYNN A. BRANDVOLD, Senior Chemist...Office) STEVEN M. CATHER, Field Economic Geologist RICHARD CHAMBERLN, Field Economic Geologist RICHARD...Assistant Head, Petroleum Section SEAN CONNELL, Field Geologist RUBEN A. CRESPIN, Garage Supervisor NELIA...Industrial minerals and rocks of the tri-state border regionā West Texas, southern New Mexico, and northern...AbstractāIndustrial minerals and rocks in the tri-state border region are located in a variety of geologic environments |
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| huge amount of data has been accumulated in the field of high-pressure mineralogy to date (Agee 1998;...Inclusions in diamond from the K14 and K10 kimberlites, Buffalo Hills, Alberta, Canada: diamond growth in...Lithos 77:99ā111 References 3 Harte B (2010) Diamond formation in the deep mantle: the record of mineral...diamonds from Sao Luiz, Brazil. Mantle Petrol: Field Observations and High Pressure Experimentation:...Irifune T, Ohtani E, Kumazawa M (1982) Stability field of knorringite Mg3 Cr2 Si3 O12 at high pressure |
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| interlocking texture of jadeite crystals; crossed nicols; field of view about 6 mm across. intersect at 87Ā° and...Porphyroblastic texture in black jadeite; crossed nicols; field of view about 6 mm across. 419418 1 418420 ...cracks and grain boundaries. Plane polarised light; field of view about 6 mm across. omphacitic jadeite and...with black dust-like inclusions; crossed nicols; field of view about 2 mm across. 2. Opaque or dark dust-like...angles to the cleavage. Plane polarised light; field of view about 6 mm across. J. Gemm., 1999, 26, |
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| of significant papers on the variety of ages of diamond and of their chemical and isotopic variation. At...Table-cut diamond. Photo by E.A. Jobbins by courtesy of the Museum of London The diamond in the ring...century which makes it virtually certain that the diamond is of Indian origin. 398 would always give them...immersed in benzyl benzoate and examined in dark-field lighting), clear two-phase feathers and in one particular...having gained their Diploma in Gemmology or the Gem Diamond Diploma (FGA or DGA) may now apply for the use |
 | Taylor, Lawrence A., Keller, Randall A., Snyder, Gregory A., Wang, Wuyi, Carlson, William D., Hauri, Erik H., Mccandless, Tom, Kim, Kuk-Rak, Sobolev, Nikolai V., Bezborodov, Sergei M. (2000) Diamonds and Their Mineral Inclusions, and What They Tell Us: A Detailed āPull-Apartā of a Diamondiferous Eclogite. International Geology Review, 42 (11) 959-983 doi:10.1080/00206810009465120 | Journal (article/letter/editorial) |
| Carnegie Institution of Washington, Washington, District of Columbia 20015 TOM MCCANDLESS, Department of...8ā°. Within a diamond, the total N varies considerably from 15 to 285 ppm in one diamond to 103 to 1250...environments for each diamond. This study directly bears on the concept of diamond inclusions as time capsules...serious question that must be addressed in all diamond-inclusion endeavors. 0020-6814/00/487/959-25 $10...the pressure-temperature conditions under which diamond will crystallize are well known, much remains to |
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| Top 6 7 1 Top Bottom Bottom 3 4 5 1 DIAMOND DEPOSITS Origin, Exploration, and History of Discovery...SME diamond_title2 9/3/02 9:29 AM Page 1 DIAMOND DEPOSITS Origin, Exploration, and History of Discovery...CHAPTER 1 HISTORY OF DIAMOND DISCOVERIES 1 Introduction 3 History of Diamond Discoveries References...References 29 CHAPTER 2 DIAMOND MORPHOLOGY 3 3 33 General Properties and Internal Structure Crystal Habit...Habit 37 Varieties of Diamond 38 Dissolution Phenomena 44 References 46 CHAPTER 3 AGE AND ORIGIN OF DIAMONDS: |
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| The Identification of Artificial Coloration in Diamond Kenneth V. G. Scarratt Heat Treating Corundum:...Natural Blue Sapphire Opal and Synthetic Opal Diamond Simulants Green Jade and J a d e S i m d a n t...Biwa, J a p a n G e m Cutting of Idar-Obcrstein Diamond Cutting G e m Pegmatites of Brazil ~ ^ĆĀ„EA~oobto...the submission of articles on all aspects of the field. Please see the Suggestions for Authors for preparing...pegmatite located near Kolonne in the Ratnapura district, where the blue sapphire is found together with |
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| determining the geographic origin of gem-quality diamond, which are based largely on trace element and isotopic...determining the provenance of a random individual diamond. 290 Sapphire Beneath the Rich Black Soil of...Notes Exceptional fancy red diamond ā¢ Treated ānickel-richā green diamond ā¢ Gota de aceiteālike effect...moissanite ā¢ Synthetic moissanite presented as natural diamond rough ā¢ Catās-eye ParaĆba tourmaline with copper...inclusions p. 359 364 G&G Micro-World Breyite in diamond ā¢ āSurpriseā in elbaite tourmaline ā¢ Unusual purple |
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| identified in global suites of mantle xenoliths or diamond inclusions. They occur in certain harzburgite members...encountered in most global mantle harzburgites and diamond inclusions. The ultra-depleted garnets occur in...of refractory mantle beneath both the core and eastern margin of the Tanzanian Craton may account for...harzburgite and lherzolite xenoliths from near the eastern margin of the Tanzanian Craton, particularly focusing...compositions have not previously been reported from diamond inclusions or peridotites. We compare the Lashaine |
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| https://archive.org/details/mineplanningequi0000inte_x1d6 MINE PLANNING AND EQUIPMENT SELECTION 1995 PROCEEDINGS...SYMPOSIUM ON MINE PLANNING AND EQUIPMENT SELECTION/CALGARY/CANADA/31 OCTOBER-3 NOVEMBER 1995 Mine Planning...Balkema, Rotterdam Printed in the Netherlands Mine Planning and Equipment Selection 1995, Singhal et...evaluation; Mine production; Mine simulation; Production scheduling; Computerized mine planning Pit...quarries 19 āINFRAā ā Computer-aided planning of mine transportation systems C.Buhrow 29 Managerial |
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| extensive guide to the scientific literature in this field. This book will be valuable to a wide readership...illustration: A ruby, sapphire, emerald, citrine and diamond clip, mounted by Cartier, Paris, 1940, deĀ¬ signed...Fashioning of diamond Other stones 108 108 116 7 7.1 7.2 Gemstones in commerce Diamond grading Buying...the book all the journals and monographs in the field have been consulted so that the book should stand...rarity. These terms are to some extent flexible: diamond for example is very rare indeed compared to salt |
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| Fashioning Fashioning of diamond Other stones 108 7 7.1 7.2 Gemstones in commerce Diamond grading Buying gemstones...the book all the journals and monographs in the field have been consulted so that the book should stand...rarity. These terms are to some extent flexible: diamond for example is very rare indeed compared to salt...magnification but a microscope that can provide dark-field illumination is very useful since the inclusions...the stone came from - sometimes down to the actual mine. Today it is commonplace to see in sale catalogues |
 | | Book (edition) |
| Origin of the Name ā The Hardness of Diamond ā āDiamond cut Diamondā ā Diamonds in Social History ā Diamonds...Literature ā āValley of Diamondsā ā Diamond Cutting ā Mysticism and Diamond ā Precious Stones ā As a Medicine...Medicine ā As a Poison ā Magic Powers ā Diamond as a Gem ā Attributes of Gems ā Synthetic Diamonds ā Synthetics...Diamonds in Africa ā The First Diamond ā First Authenticated Diamond ā Mining Rights ā The First Big...Republic ā The First Pipe Mines ā The Excelsior Diamond ā More Pipe Mines Discovered ā Biggest Rush to |
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| geochem of trained a new generation slowly. grew field the But number of universities. report all In the...concurrent, and they all ranged across the entire field. Since then the developments in instrumentation...Of these only three attempted to cover the whole field. The excellent Geochemistry by K. Rankama and Th...expansion of the number of practitioners in the field have produced valuable sets of high-quality data...chapters that together summarize the part of the field covered by the volume. The volume editors and chapter |
 | Kogel, Jessica Elzea, Trivedi, Nikhil C., Barker, James M., Krukowski, Stanley T. - Eds. (2006) Industrial Minerals and Rocks (7th ed.) Society for Mining, Metallurgy, and Exploration, Inc., Littleton, CO. | Book (edition) |
| . . . . . . . . . . . . . . . . . . . . . . . . Mine Safety and Health Law . . . . . . . . . . . . ....admiration for his countless contributions to the field of industrial minerals, we dedicate this 7th edition...the professional development of geologists in the field of nonmetalliferous geology. Robert Dreyer received...Ray E. Harris G.E. Dolbear and Associates, Inc. Diamond Bar, California Todd S. Harris New Jersey Geological...represent a consensus of many professionals in the field as to what defines the scope of industrial minerals |
 | | Book |
| position of 56Fe; and (iv) the abundance peaks in the region past iron at the neutron closed shell positions...mixing caused by the convection, the entire unstable region evolves essentially chemically homogeneouslyāreplenishing...of burning region (central or shell burning) and depleting the fuel elsewhere in that region at the same...burning of this fuel then commences outside that region. Table 1 summarizes the burning stages and their...maximum temperatures that have been reached in each region in the preceding hydrostatic burning stages (Table |
