De Hoog, J. C. M., Stachel, T., & Harris, J. W. (2019). Trace-element geochemistry of diamond-hosted olivine inclusions from the Akwatia Mine, West African Craton: implications for diamond paragenesis and geothermobarometry. Contributions to Mineralogy and Petrology, 174(12), 100.

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	Stachel, T., Harris, Jeffrey W. (1997) Syngenetic inclusions in diamond from the Birim field (Ghana) - a deep peridotitic profile with a history of depletion and re-enrichment. Contributions to Mineralogy and Petrology, 127 (4) 336-352 doi:10.1007/s004100050284	Journal (article/letter/editorial)
	Harris Syngenetic inclusions in diamond from the Birim ®eld (Ghana) ± a deep peridotitic pro®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 dier 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
	De Hoog, J. C. M., Stachel, T., Harris, J. W. (2019) Trace-element geochemistry of diamond-hosted olivine inclusions from the Akwatia Mine, West African Craton: implications for diamond paragenesis and geothermobarometry. Contributions to Mineralogy and Petrology, 174 (12) doi:10.1007/s00410-019-1634-y	Journal (article/letter/editorial)
	Trace‑element geochemistry of diamond‑hosted olivine inclusions from the Akwatia Mine, West African Craton: implications...implications for diamond paragenesis and geothermobarometry J. C. M. De Hoog1 · T. Stachel2 · J. W. Harris3...coexisting garnets included in diamonds from the Akwatia Mine (Ghana, West African Craton) were measured to show...similar information about equilibration temperature, diamond paragenesis and mantle processes as garnet. Trace-element...Conventional geothermobarometry indicates that Akwatia diamonds formed and resided close to a 39 mW/m2
	Seitz, Hans-Michael, Brey, Gerhard P., Stachel, Thomas, Harris, Jeff W. (2003) Li abundances in inclusions in diamonds from the upper and lower mantle. Chemical Geology, 201 (3) 307-318 doi:10.1016/j.chemgeo.2003.08.001	Journal (article/letter/editorial)
	decreases in olivine inclusions with increasing forsterite content, which we interpret as reflecting a depletion...silicate phases by a metasomatic agent during diamond formation unlike other trace elements like REE...rights reserved. Keywords: Lithium; Inclusions in diamond; Eclogites; Peridotites; Websterites; Majorite...chemgeo.2003.08.001 ed at the time and place of diamond formation and carry information on the chemistry...signatures of diamonds and their inclusions unravelled diamond formation processes, the magmatic, metamorphic
	Stachel, Thomas, Brey, Gerhard P., Harris, Jeff W. (2000) Kankan diamonds (Guinea) I: from the lithosphere down to the transition zone. Contributions to Mineralogy and Petrology, 140 (1) 1-15 doi:10.1007/s004100000173	Journal (article/letter/editorial)
	inclusions in alluvial diamonds from the Kankan region of Guinea in West Africa are mainly of lherzolitic...exclusively lherzolitic garnets document that the diamond source experienced a previous stage of melt extraction...from the Monastery mine. Subsequently, the discovery of diamonds from the Brazilian mine SaÄo Luiz, which...the present study on diamonds from the Kankan district in Guinea, we will examine the major and trace...lithospheric inclusion parageneses and then evaluate diamond populations derived from the asthenosphere and
	Stachel, Thomas, Harris, Jeff W., Brey, Gerhard P. (1998) Rare and unusual mineral inclusions in diamonds from Mwadui, Tanzania. Contributions to Mineralogy and Petrology, 132 (1) 34-47 doi:10.1007/s004100050403	Journal (article/letter/editorial)
	Accepted: 7 January 1998 Abstract Syngenetic diamond inclusions from the Mwadui kimberlite reveal that...pairs suggests successive iron enrichment during diamond formation, e.g. leading to the presence of harzburgitic...harzburgitic garnet and lherzolitic olivine in the same diamond. Apart from the dominant peridotitic inclusion...association Fe-FeO-Fe3O4 in one single diamond indicates diamond formation over a large range of fO2 conditions...harzburgitic garnet and a SiO2-phase in the same diamond. Alternatively the formation of the SiO2phase may
	*Stachel, T., Harris, J.W. (2008) The origin of cratonic diamonds — Constraints from mineral inclusions. Ore Geology Reviews, 34 (1) 5-32 doi:10.1016/j.oregeorev.2007.05.002*	Journal (article/letter/editorial)
	2007 Available online 22 April 2008 Keywords: Diamond formation Peridotitic Eclogitic Websteritic Subcratonic...suites and used to establish the characteristics of diamond source rocks in the subcratonic lithospheric mantle...(Kalahari Craton) is by far the best studied diamond source region in the world but appears to be unique rather...and trace element characteristics of peridotitic diamond sources indicate polybaric melt extraction proceeding...mounting evidence from xenolith studies, eclogitic diamond sources are linked to subducted oceanic protoliths
	Gunn, A.G., Dorbor, J.K., Mankelow, J.M., Lusty, P.A.J., Deady, E.A., Shaw, R.A., Goodenough, K.M. (2018) A review of the mineral potential of Liberia. Ore Geology Reviews, 101. 413-431 doi:10.1016/j.oregeorev.2018.07.021	Journal (article/letter/editorial)
	of iron ore is currently restricted to a single mine, Yekepa, in the Nimba Range. Other important deposits...Goe Fantro. There is a long history of alluvial diamond production in western and central Liberia, together...diamonds since the 1960s and 1970s. Further detailed field and laboratory 1 investigations using modern techniques...Senegal, Guinea, Sierra Leone and Mali in the west to Ghana and Niger in the east. The western part of the Leo-Man...domain) comprises Archaean gneisses, whereas the eastern part (the Baoulé-Mossi domain) is largely Paleoproterozoic
	Harris, Jeff W., Stachel, Thomas, Léost, Ingrid, Brey, Gerhard P. (2004) Peridotitic diamonds from Namibia: constraints on the composition and evolution of their mantle source. Lithos, 77 (1) 209-223 doi:10.1016/j.lithos.2004.03.028	Journal (article/letter/editorial)
	2004 Elsevier B.V. All rights reserved. Keywords: Diamond; Inclusion; Peridotite; Mantle metasomatism; REE;...characteristics of both peridotitic and websteritic diamond sources (Leost Inclusions were released by crushing...1997a; Stachel et al., 2000). The compositional field for lherzolitic garnets is from Sobolev et al. (1973)...(Cr2O3 of 2.6 – 17.3 wt.%) of garnets is rare among diamond sources worldwide, and on the Kalahari Craton,...olivine coexists with clinopyroxene in the same diamond (Nam-51B, Table 2) and two more olivines have similarly
	Phillips, D., Harris, J.W., Viljoen, K.S. (2004) Mineral chemistry and thermobarometry of inclusions from De Beers Pool diamonds, Kimberley, South Africa. Lithos, 77 (1) 155-179 doi:10.1016/j.lithos.2004.04.005	Journal (article/letter/editorial)
	inclusions record the conditions at the time of diamond crystallisation ( f 1200 jC; f 3.0 Ga). The lower...Phillips et al. / Lithos 77 (2004) 155–179 between diamond and silicate inclusions. However, thermodynamic...Thermobarometry; De Beers Pool inclusions 1. Introduction Diamond provides an impermeable barrier that can insulate...sub-continental mantle lithosphere at the time of diamond formation. Most inclusions can be sub-divided into...temperature/pressure conditions and/or unique environments of diamond formation (e.g. Taylor et al., 1996; Sobolev et
	*Zhao, Donggao (2022) Electron Probe Microanalysis and Microscopy of Polishing-Exposed Solid-Phase Mineral Inclusions in Fuxian Kimberlite Diamonds. Minerals, 12 (7) 844 doi:10.3390/min12070844*	Journal (article/letter/editorial)
	Abstract: Solid-phase mineral inclusions in diamond (1–3 mm in diameter) from the No. 50 kimberlite...carbonate and sulfide inclusions were recovered in the diamond. The common solid-phase inclusions are olivine...and composition of the solid-phase inclusions in diamond indicate that they belong to the peridotitic suite...eclogitic mineral inclusions were found in the diamond. The slightly lower Mg # of the olivine inclusions...to 0.79 wt. %) in some chromite inclusions in diamond than those in chromite inclusions worldwide, the
	*Moore, Thomas P. (2004) A Collection of Diamond Crystals, With Notes on the Science, History and Worldwide Localities of Diamonds, in Diamonds & Gold!. The Mineralogical Record, 35 (1) 9-63*	Journal (article/letter/editorial)
	East River Road, #1317 Tucson, AZ 85750 Natural diamond crystals are among the most elegant and charismatic...for world diamonds, and by the Russian Diamond Fund. Diamond can hardly be said to be a rare mineral...January–February, 2004 species. One of the early diamond specialists was the British collector Sir Abraham...Hume (1749–1838), whose fine collection of 107 diamond crystals was cataloged by Count de Bournon in 1815...dealer Henry Heuland), possessed 109 examples of diamond. Armand Levy, who prepared Turner’s published collection
	Hutchison, Mark T., Frei, Dirk (2009) Kimberlite and related rocks from Garnet Lake, West Greenland, including their mantle constituents, diamond occurrence, age and provenance. Lithos, 112. 318-333 doi:10.1016/j.lithos.2009.05.034	Journal (article/letter/editorial)
	Greenland, including their mantle constituents, diamond occurrence, age and provenance Mark T. Hutchison...Keywords: Kimberlite Aillikite Orangeite Carbonatite Diamond Mantle geotherm Greenland Garnet Lake a b s t...Greenland lamprophyric rocks and from well within the diamond stability ﬁeld. Diamonds are typically colourless...conditions exhibited by mantle xenoliths, calculated diamond formation ages peaking around 583–593 Ma are favoured...complex. A model of mantle refertilisation and diamond formation culminating in conditions favourable
	Wijbrans, C. H., Niehaus, O., Rohrbach, A., Pöttgen, R., Klemme, S. (2014) Thermodynamic and magnetic properties of knorringite garnet (Mg3Cr2Si3O12) based on low-temperature calorimetry and magnetic susceptibility measurements. Physics and Chemistry of Minerals, 41 (5) 341-346 doi:10.1007/s00269-013-0653-x	Journal (article/letter/editorial)
	particular, Cr-rich garnets are commonly found in diamond inclusions and in deep-seated mantle xenoliths...often found in diamond-bearing mantle xenoliths and are also used as a so-called diamond indicator mineral...mineral in the diamond exploration industry (Cookenboo and Grutter 2010). However, the stability of Cr-bearing... with some MgCr2O4 and very minor amounts of forsterite and eskolaite (<1 %). The Mg3Cr2Si3O12 contained...magnetic field strength of 10 kOe. The inset shows the magnetic susceptibility in zero-field- (ZFC) and
	Howarth, Geoffrey H., Giuliani, Andrea (2020) Contrasting types of micaceous kimberlite-lamproite magmatism from the Man Craton (West Africa): New insights from petrography and mineral chemistry. Lithos, 362. 105483 doi:10.1016/j.lithos.2020.105483	Journal (article/letter/editorial)
	that these cores have P-T equilibration within diamond stability at Weasua and Tongo. 2) Al-, Ca- and...and Neoproterozoic diamondiferous rocks of the region. The primary goals of the current study are to:...(2017), with implications for understanding the diamond potential at each locality. This study has implications...kimberlites and do not plot within the Koidu-Aries field. They suggested that the ur Craton. na Neoproterozoic... Jo Previous studies on mantle xenoliths and diamond indicator mineral chemistry for West African diamondiferous
	Bindi, Luca, Sirotkina, Ekaterina A., Bobrov, Andrey V., Nestola, Fabrizio, Irifune, Tetsuo (2016) Chromium solubility in anhydrous Phase B. Physics and Chemistry of Minerals, 43 (2) 103-110 doi:10.1007/s00269-015-0777-2	Journal (article/letter/editorial)
	having the overall Mg12Si2O16 stoichiometry and a forsterite-type layer with Mg octahedra and Si tetrahedra...with increasing pressure in the Earth’s mantle forsterite undergoes the transformation to wadsleyite and...(2006) suggested that the 13 104 reaction forsterite + periclase to Anh-B could account for the so-called...the composition magnesiochromite (Sp–MgCr2O4)–forsterite (Fo–Mg2SiO4) Sp10Fo90 (mol%). Temperatures were...Albee and Ray (1970). The standards employed were forsterite (Mg, Si) and synthetic Cr2O3 (Cr). The crystal
	*Matrosova, Ekaterina A., Bobrov, Andrey V., Bindi, Luca (2020) Geochemistry of Chromium in the Earth’s Mantle. Springer International Publishing. doi:10.1007/978-3-030-27018-6*	Book
	structure Dunite Enstatite Eskolaite (Cr2O3) Forsterite Ferropericlase Garnet Harzburgite Ilmenite Knorringite...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 77:99–111 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:
	*(1994, July) Gems & Gemology* Vol. 30 (2) Gemological Institute of America**	Journal (issue)
	Heinz-Tiirgen Bernhardt Emeralds from the Mananjary Region, Madagascar: Internal Features Dietmar Schwarz...Schwarz NOTES AND NEW TECHNIQUES Synthetic Forsterite and Synthetic Peridot Kurt Nassau Update on Mining Rubies...the submission of articles on all aspects of the field. Please see the suggestions fat authors in the Spring...e-vibration. General absorption in the ultraviolet region is at 290 (el and 280 n m (o),respectively. There...1987 Gemstone Durability: Design to Display Wessels Mine Sugitite Three Notable Fancy-Color Diamonds The
	*(2020) The Journal of Gemmology* Vol. 37 (2) Gem-A**	Journal (issue)
	2020 COLUMNS What’s New 115 CIBJO Blue Books \| Diamond Terminology Guidelines \| GemGuide Articles \| GIT...Aquamarine with Spodumene Inclusions from the Oceanview Mine, California, USA \| Demantoid/ Andradite Slices from...Terrence S. Coldham Emmanuel Fritsch HONORARY DIAMOND MEMBER Martin Rapaport CHIEF EXECUTIVE OFFICER...the-blue-books-2. Diamond Terminology Guidelines In September 2019, the Diamond Producers Association...Association, in conjunction with seven other leading diamond industry organisations, issued a brief reference
	Miller, Christine E., Kopylova, Maya, Smith, Evan (2014) Mineral inclusions in fibrous diamonds: constraints on cratonic mantle refertilization and diamond formation. Mineralogy and Petrology, 108 (3) 317-331 doi:10.1007/s00710-013-0305-3	Journal (article/letter/editorial)
	constraints on cratonic mantle refertilization and diamond formation Christine E. Miller & Maya Kopylova &...on the ambient mantle by formation of fibrous diamond. Calcium and Fe enrichment of peridotitic garnet...enrichment of olivine associated with fibrous diamond-forming fluids contributes to refertilization of...expected in local mantle segments during fibrous diamond production, as Ca in the carbonatitic fluids is...surrounding mantle when oxidized carbon is reduced to diamond. Harzburgitic garnet evolves towards Ca-rich compositions
	Sirotkina, Ekaterina A., Bobrov, Andrey V., Bindi, Luca, Irifune, Tetsuo (2018) Chromium-bearing phases in the Earth's mantle: Evidence from experiments in the Mg2SiO4–MgCr2O4 system at 10–24 GPa and 1600°C. American Mineralogist, 103 (1) 151-160 doi:10.2138/am-2018-6264	Journal (article/letter/editorial)
	the full range of starting compositions for the forsterite-magnesiochromite system to derive a P–X phase...podiform chromitites. Keywords: Magnesiochromite, forsterite, olivine, wadsleyite, ringwoodite, knorringite...(2012). Five compositions falling between the forsterite Mg2SiO4 and magnesiochromite MgCr2O4 end-members...composition) results in the formation of a single-phase field of wadsleyite (Fig. 4). At a pressure of >12 GPa...size up to 50 mm. With increasing pressure, the field of Ct expands to the lower Cr concentrations in
	*(1999, October) The Journal of Gemmology* Vol. 26 (8) Gem-A**	Journal (issue)
	conditions. The growing of the beryllium LONDON DIAMOND REPORT The Gem Testing Laboratory minerals'...Novosibirsk, 39-53 (in Russian) Diamond grading service established in 1980 Each diamond graded by three experienced...clarity Whether buying or selling, the London Diamond Report assures the prestige of your stone The...G., 1983. Vibrational spectra and valence force field of crystalline V 2 0 5 . Spectrochimica Acta, 39A(7)...of the substances in the characteristic spectrum region below 2000 crrr", we concentrated on the peaks
	Tappert, R. (2006) Placer Diamonds from Brazil: Indicators of the Composition of the Earth's Mantle and the Distance to Their Kimberlitic Sources. Economic Geology, 101 (2) 453-470 doi:10.2113/gsecongeo.101.2.453	Journal (article/letter/editorial)
	early 18th century and that Brazil was the main diamond producer in the world until 1870, the knowledge...Tompkins, 1994). These discoveries show that primary diamond sources exist in Brazil, but so far their small...placer deposits, and perhaps additional primary diamond deposits may be found in Brazil. If they exist...inclusions. Considering the extent of alluvial diamond sources in Brazil, previous studies of this type...Brazil have been published. One exception is the diamond suite from the Juina area, which includes the original
	Anjos, Camila Wense Dias Dos, Meunier, Alain, Guimarães, Edi Mendes, el Albani, Abderrazzak (2010) Saponite-rich black shales and nontronite beds of the Permian Irati Formation: sediment sources and thermal metamorphism (Paraná basin, Brazil) Clays and Clay Minerals, 58 (5) 606-626 doi:10.1346/ccmn.2010.0580503	Journal (article/letter/editorial)
	large intracratonic basin located in the central eastern part of the South America Platform (Figure 1)....the states of Goiás and Mato Grosso). In this region, the dolostone levels of the Assistência Member...(Figure 7a). The 3675 cm 1 band (OH-stretching region, Figure 8) indicates the presence of 3Mg-OH groups...micro-analyses did not plot in the composition field of a single mineral species but 616 Dos Anjos...ultramafic rocks from the Akwatia district of the Birim diamontiferous field, Ghana. Journal of Radioanalytical
	*Litvin, Yuriy A. (2017) Genesis of Diamonds and Associated Phases. Springer International Publishing. doi:10.1007/978-3-319-54543-1*	Book
	Russian Academy of Sciences Chernogolovka, Moscow Region Russia ISSN 2366-1585 Springer Mineralogy ISBN...Gewerbestrasse 11, 6330 Cham, Switzerland Preface Diamond-bearing upper mantle eclogite rock has been found...genetically associated mineral phases. Later on, the diamond-associated phases were discovered as primary solid...study of the relevant multicomponent heterogeneous diamond-producing mineral systems. The actual PT conditions...with the present state of genetic mineralogy of diamond and associated phases. Contents of the book may
	*(1995) The Journal of Gemmology* Vol. 24 (6) Gem-A**	Journal (issue)
	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