	Deines, Peter, Harris, J.W, Gurney, J.J (1991) The carbon isotopic composition and nitrogen content of lithospheric and asthenospheric diamonds from the Jagersfontein and Koffiefontein kimberlite, South Africa. Geochimica et Cosmochimica Acta, 55 (9) 2615-2625 doi:10.1016/0016-7037(91)90377-h	Journal (article/letter/editorial)
	diamonds from the Jagersfontein and Koffiefontein kimberlite, South Africa PETER DEINES,’J. W. HARRIS,’ and...GURNEYS ‘Department of Geosciences, The Pennsylvania State University, University Park, PA 16802, USA 2Department...Department, University of Cape Town, Rondebosch 7700, South Africa (Received September 19, 1990; accepted in revised...diamonds, from the Jagersfontein kimberlite, South Africa, have a 613Crange from - 18.9 to -24.4%0 vs...vs. PDB. Deep diamonds from the nearby Koffiefontein mine have 613Cvalues between -2.9 and -6.1 %o.At these
	Izraeli, Elad S., Harris, Jeffrey W., Navon, Oded (2004) Fluid and mineral inclusions in cloudy diamonds from Koffiefontein, South Africa. Geochimica et Cosmochimica Acta, 68 (11) 2561-2575 doi:10.1016/j.gca.2003.09.005	Journal (article/letter/editorial)
	mineral inclusions in cloudy diamonds from Koffiefontein, South Africa ELAD S. IZRAELI,1,* JEFFREY W. HARRIS...in microinclusions in cloudy diamonds from Koffiefontein. The silicates belong to either the eclogitic...the larger mineral inclusions found in other Koffiefontein diamonds and record similar pressures and temperatures...mineral phases that were not detected before in Koffiefontein: phlogopite, high-Si mica, an Al-Mg-rich phase...with the high proportion of cloudy diamonds in Koffiefontein, suggest that brine penetration into neighboring
	Timmerman, S., Jaques, A.L., Weiss, Y., Harris, J.W. (2018) N-δ13C-inclusion profiles of cloudy diamonds from Koffiefontein: Evidence for formation by continuous Rayleigh fractionation and multiple fluids. Chemical Geology, 483. 31-46 doi:10.1016/j.chemgeo.2018.02.024	Journal (article/letter/editorial)
	N-δ13C-inclusion profiles of cloudy diamonds from Koffiefontein: Evidence for formation by continuous Rayleigh...N-δ13Cinclusion profiles of cloudy diamonds from Koffiefontein: Evidence for formation by continuous Rayleigh...N-δ13C-inclusion profiles of cloudy diamonds from Koffiefontein: evidence for formation by continuous Rayleigh...zone (‘cloudy diamonds’) from the Koffiefontein mine, South Africa, were investigated for N concentrations...aggregation state along core-torim traverses in six cloudy diamonds from the Koffiefontein mine in South Africa
	Pearson, D.G., Shirey, S.B., Harris, J.W., Carlson, R.W. (1998) Sulphide inclusions in diamonds from the Koffiefontein kimberlite, S Africa: constraints on diamond ages and mantle Re–Os systematics. Earth and Planetary Science Letters, 160 (3) 311-326 doi:10.1016/s0012-821x(98)00092-2	Journal (article/letter/editorial)
	Sulphide inclusions in diamonds from the Koffiefontein kimberlite, S Africa: constraints on diamond ages and...Department of Geological Sciences, Durham University, South Road, Durham DH1 3LE, UK Department of Terrestrial...(P-type) parageneses in diamonds from the Koffiefontein mine, South Africa have been analysed using a technique...and diamond population of the Koffiefontein kimberlite The Koffiefontein kimberlite pipe is located approximately...I suite [23]. Of the diamond population at Koffiefontein, 0.6% contain inclusions, 42% of these inclusion-bearing
	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 from De Beers Pool diamonds, Kimberley, South Africa D. Phillips a,, J.W. Harris b, K.S. Viljoen...Mines Ltd., P.O. Box 82232, Southdale, 2135, South* Africa b Received 27 June 2003; accepted 14 December...important De Beers Pool kimberlites in Kimberley, South Africa, are characterised by harzburgitic compositions...important De Beers Pool kimberlites in Kimberley, South Africa (28j46VS, 24j48VE). The Kimberley region is...the site of the first diamond discoveries in South Africa, the type locality for Group I (basaltic) kimberlites
	Davies, Rondi M., Griffin, William L., O'Reilly, Suzanne Y., Doyle, Buddy J. (2004) Mineral inclusions and geochemical characteristics of microdiamonds from the DO27, A154, A21, A418, DO18, DD17 and Ranch Lake kimberlites at Lac de Gras, Slave Craton, Canada☆. Lithos, 77 (1) 39-55 doi:10.1016/j.lithos.2004.04.016	Journal (article/letter/editorial)
	isotope, nitrogen content, nitrogen aggregation state and morphological study of 576 microdiamonds from...Conference, extended abstracts) and Snap Lake to the south (Dokl. Earth Sci. 380 (7) (2001) 806), that are...study are sampled (black diamonds) and the Ekati mine property (grey diamonds). R.M. Davies et al. /...characteristics, Cisotope, N-content and N-aggregation state data for inclusion bearing diamonds are presented...(2004) 39–55 (e.g., Bulanova et al., 1998) and South Africa (Gurney et al., 1984b). Ilmenite occurs in one
	Brey, Gerhard P., Bulatov, Vadim, Girnis, Andrei, Harris, Jeff W., Stachel, Thomas (2004) Ferropericlase—a lower mantle phase in the upper mantle. Lithos, 77 (1) 655-663 doi:10.1016/j.lithos.2004.03.013	Journal (article/letter/editorial)
	(g-phase) or ringwoodite to Mg –Si perovskite plus periclase (Liu, 1974, 1975). Ferropericlase is therefore...and together with enstatite in diamonds from Koffiefontein, it was considered as an indicator of a lower...enough. In a sample collection from the Kankan district, Guinea, they found a diamond (KK84) with ferropericlase...(Kesson and Gerald, 1992). The solubility of Na in periclase has been determined experimentally so far only...This led us to study the solubility of Na in periclase at upper mantle pressures in the presence of the
	Helmstaedt, H. H., Gurney, J. J., Richardson, S. H. (2010) AGES OF CRATONIC DIAMOND AND LITHOSPHERE EVOLUTION: CONSTRAINTS ON PRECAMBRIAN TECTONICS AND DIAMOND EXPLORATION. The Canadian Mineralogist, 48 (6) 1385-1408 doi:10.3749/canmin.48.5.1385	Journal (article/letter/editorial)
	of Cape Town, Rondebosch, 7700, Republic of South Africa Abstract Ages of syngenetic inclusions of peridotitic...higher-pressure minerals (e.g., majorite, ferroan periclase, MgSi and CaSi analogues of perovskite) suggestive...Premier, representing oldest Group-I kimberlite mine (filled diamond), increasing thickness of solid...decreasing age. GII: Group-II kimberlite (in southern Africa only). Lamproite: Bo: Bobi, Ar: Argyle, El: Ellendale...distinguished it from other gem-quality, nitrogen-free type-II diamond with inclusions of eclogitic and
	*Harlow, G. E., Davies, R. M. (2005) Diamonds. Elements, 1 (2) 67-70 doi:10.2113/gselements.1.2.67*	Journal (article/letter/editorial)
	diamond, 287.42 ct, canary, from Kimberley, South Africa. PHOTO COURTESY OF TIFFANY & CO. ARCHIVES George...Proton Monastery Kimberley Koffiefontein Jagersfontein Orrorroo New South Wales Tecton World map showing...transition zone, silicate perovskite plus ferro-periclase replace ringwoodite. Ferropericlase – (or magnesiowüstite)...Mg2SiO4 = MgSiO3 + MgO. IMA suggests ferroan periclase. Pyrolite – coined by A.E. Ringwood for a model...3He/4He Harzburgite – a peridotite essentially free (<5%) of clinopyroxene and thus depleted in elements
	*Mitchell, Roger H. (1986) Kimberlites. Springer US. doi:10.1007/978-1-4899-0568-0*	Book
	............................ 126 5.3.3.2. West Africa ........................................... 126...11. 6.12. 6.13. 6.14. 6.15. 6.6.3 .1. Diverse South African Kimberlites (Dawson and Smith 1975, Smith...7.2. 2. Compositional Variation of Contamination-Free Kimberlites .......... 7.2 .2 .I. Intra-kimberlite.......................... 437 KIMBERLITES Ex Africa semper aliquid novi. Pliny The Elder, Natural...confluence of the Vaal, Orange, and Riet Rivers of South Africa in 1866-1867. The ebb and flow of prospecting
	Morizet, Yann, Larre, Chloé, Di Carlo, Ida, Gaillard, Fabrice (2020) High S and high CO2 contents in haplokimberlite: An experimental and Raman spectroscopic study. Mineralogy and Petrology, 114 (5). 363-373 doi:10.1007/s00710-020-00711-1	Journal (article/letter/editorial)
	al. 2011). Sulfur in kimberlites - the present state of knowledge Early work by Dawson (1980) gives a...Morizet et al. (2017a; see Table 1); which provides S-free CO2-bearing solubility data. As a result, the effect...solubility could be determined and comparison to S-free solubility data can be achieved. The composition...experiments, the loaded initial S is in an oxidized state (S6+). We mixed the starting powder in an agate...(CaSiO3), corundum (Al2O3), albite (NaAlSi3O8), periclase (MgO), barite (BaSO4). Na was analyzed first to
	Simakov, S.K (1998) Redox state of Earth’s upper mantle peridotites under the ancient cratons and its connection with diamond genesis. Geochimica et Cosmochimica Acta, 62 (10) 1811-1820 doi:10.1016/s0016-7037(98)00105-7	Journal (article/letter/editorial)
	00 Pergamon PII S0016-7037(98)00105-7 Redox state of Earth’s upper mantle peridotites under the ancient...inclusions in diamonds, diamond-bearing, and diamond-free xenoliths using garnet-orthopyroxene barometers...metal-silicate melts. Diamond-bearing and diamond-free peridotite xenoliths equilibrated with CO2-H2O and...ancient cratons (Ballhaus, 1993). The oxidation state of garnet lherzolites has not been extensively studied...depending on geodynamic conditions. This implies that a free C-H-O dominated fluid phase cannot generally be
	*Moore, A.E. (2009) Type II diamonds: Flamboyant Megacrysts?. South African Journal of Geology, 112 (1) 23-38 doi:10.2113/gssajg.112.1.23*	Journal (article/letter/editorial)
	6140, South Africa. e-mail: andy.moore@info.bw © 2009 March Geological Society of South Africa ABSTRACT...3106 Cullinan, recovered from the Premier Mine, South Africa (Williams, 1932), as well as gems like the...kindly provided by Debbie Bowen of Letseng Diamond Mine, illustrates a selection of Type IIa stones from...the Letseng Type IIa stones do not fluoresce. SOUTH AFRICAN JOURNAL OF GEOLOGY, 2009, VOLUME 112 PAGE...IIa diamonds from Letseng Mine, curtesey of Debbie Bowen of Letseng Diamond Mine. Large stone is the 603
	*(1996, Spring) Gems & Gemology* Vol. 32 (1) Gemological Institute of America**	Journal (issue)
	FEATURE ARTICLES 2 A Hi story of Diamond Sources in Africa: Part II A. f. A. (Bram) lanse NOTES AND EW TECHNIQUES...Kammerling worked an d traveled extensively in Africa and Europe before he arrived at GIA's Santa Monica...Spring 1996 1 A HISTORY OF DIAMOND SOURCES IN AFRICA: PART II ByA. ). A. (Bram) [anse Following the...the history of diamond di scovenes in southern Africa presented in Parr J, this article discusses the his...economic kimberlite outside South A frica was discovered in Tan zania (East Africa) in 1940, and m aj or qua
	*(2013) Proceedings of 10th International Kimberlite Conference* Vol. 1. Springer India. doi:10.1007/978-81-322-1170-9**	Book (volume)
	relevant protective laws and regulations and therefore free for general use. While the advice and information...to the material contained herein. Printed on acid-free paper Springer is part of Springer Science+Business...diamond bearing kimberlites of Dharwar Craton in South India, (ii) lamproites of Bundelkhand Craton in...(USA) Barbara Scott Smith (Canada) Craig Smith (South Africa) Nick Sobolev (Russia) Thomas Stachel (Canada)...provided logistic support during field trip to the South Indian Kimberlites. The National Mineral Development
	Izraeli, Elad S., Harris, Jeffrey W., Navon, Oded (2001) Brine inclusions in diamonds: a new upper mantle fluid. Earth and Planetary Science Letters, 187 (3) 323-332 doi:10.1016/s0012-821x(01)00291-6	Journal (article/letter/editorial)
	Abstract Micro-inclusions in cloudy diamonds from Koffiefontein consist of three main types: silicates, carbonates...inclusions in cloudy diamonds from Ko¤efontein, South Africa. These inclusions are rich in water, Cl and...orthopyroxene, garnet, clinopyroxene, chromite and periclase), 2% were eclogitic garnet and clinopyroxene and...the edges of a transparent octahedral core that is free of micro-inclusions and the inward extension of...all analyses are normalized to 100% on a carbon free basis (with excess oxygen for chlorine). 3. Results
	Meyer, Henry O. A., Boyd, F. R. - Eds. (1979) Proceedings of the Second International Kimberlite Conference Vol. 1 - Kimberlites, Diatremes, and Diamonds: Their Geology, Petrology, and Geochemistry. American Geophysical Union, Washington, D. C.	Book (volume)
	ANDWILLIAMSON MINE, TANZANIA H.-M. Tsai, O. A. Meyer, 0. Moreau, and H. Judith Milledge REGIONAL AND LOCAL VARIATIONS...KIFYBERLiTES IN THE COLORADO-WYC•ING STATE mINE DISTRICT 42 M. E. McCal!um, C. D. Mabarak, and H... K. J. Stracke, 59 OF KIMBEHLITES H.-M. IN SOUTH-EASteRN AUSTRALIA 71 J. Ferguson, an• L. P. Black...CARBONATITEERUPTIVES AT SALTPETRE 111 KOP, SU•}tERLAND, SOU'iH AFRICA J. R. •cIver and J. Ferguson M•NERALOGY AND PETROLOGY...MINERAL CHEMISTRY OF A KIMBERLITE FROM THE PR•I•IER MINE: I•iPLICATIONS FOR THE EVOLUTION OF KiFmEHLITIC
	*Dawson, J. Barry (1980) Kimberlites and Their Xenoliths* - Minerals and Rocks No. 15. Springer Berlin Heidelberg. doi:10.1007/978-3-642-67742-7**	Book
	relevant protective laws and regulations and therefore free for general use. 2132/3130-543210 To my wife,...collaboration. Much of my fieldwork in southern Africa has been carried out with the cooperation and assistance...7.3 2.8 2.9 Africa . . . . . . . . . . . . . . . . . . . . . . . . . . . . West Africa . . . . . . .... . . . . Central Africa. . . . . . . . . . . . . . . . . . . . . . . East Africa. . . . . . . . . .... . . . . . . . . . . . . . . . Southern Africa . . . . . . . . . . . . . . . . . . . . . U.S.S.R. .
	Bataleva, Yuliya V., Novoselov, Ivan D., Borzdov, Yuri M., Furman, Olga V., Palyanov, Yuri N. (2021) Experimental Modeling of Ankerite–Pyrite Interaction under Lithospheric Mantle P–T Parameters: Implications for Graphite Formation as a Result of Ankerite Sulfidation. Minerals, 11 (11) 1267 doi:10.3390/min11111267	Journal (article/letter/editorial)
	Department of Geology and Geophysics, Novosibirsk State University, 630090 Novosibirsk, Russia Correspondence:...dolomite [31]; 3—dolomite position of reaction of periclase + CO2 = MgCO3 melt [33]. [32]; 4,5—magnesite...Dotted li denotes P–Tofposition of reaction of periclase + of COdiamond MgCO [33]. 2 = from 3 melt Existing...noted, with a high-iron center and a low- or iron-free periphery rims. With an increase in temperature...with sulfide melt, the formation of low or iron-free rims (edge parts) of carbonate crystals is observed
	MOORE, A. E. (2014) THE ORIGIN OF LARGE IRREGULAR GEM-QUALITY TYPE II DIAMONDS AND THE RARITY OF BLUE TYPE IIB VARIETIES. South African Journal of Geology, 117 (2) 219-236 doi:10.2113/gssajg.117.2.219	Journal (article/letter/editorial)
	of Geology, Rhodes University, Grahamstown, South Africa. African Queen Mines Ltd., Box 66 Maun Botswana...bots@gmail.com © 2014 December Geological Society of South Africa ABSTRACT Type II (N-poor) diamonds do not constitute...megacryst magmas. Reduction of boron to the metallic state is ascribed to buffering of the megacryst magma...recovered from an Indian alluvial source, and now SOUTH AFRICAN JOURNAL OF GEOLOGY, 2014, VOLUME 117.2 PAGE...diamond recovered from the Cullinan kimberlite, South Africa. Note the irregular morphology of this stone
	*(2013, Winter) Gems & Gemology* Vol. 49 (4) Gemological Institute of America**	Journal (issue)
	formation. 223 Blue Sapphires from the Baw Mar Mine in Mogok Hpone-Phyo Kan-Nyunt, Stefanos Karampelas...combined weight of the piece, retrieved from South Africa, is 314.47 carats. This specimen is part of...present a significant paper reviewing the current state of knowledge about diamond geology. The article’s...current issue back to the journal’s launch in 1934, free to all users as PDF downloads at http://www.gia...bring our readers more of these “direct from the mine” articles, particularly from GIA’s dedicated field
	Burnham, A.D., Bulanova, G.P., Smith, C.B., Whitehead, S.C., Kohn, S.C., Gobbo, L., Walter, M.J. (2016) Diamonds from the Machado River alluvial deposit, Rondônia, Brazil, derived from both lithospheric and sublithospheric mantle. Lithos, 265. 199-213 doi:10.1016/j.lithos.2016.05.022	Journal (article/letter/editorial)
	composition, nitrogen concentration and aggregation state and mineral inclusion chemistry. Variations in morphology...suggest some diamonds have been derived directly from local kimberlites, whereas others have been through extensive...world‘s diamonds are characterised by being inclusion-free (96 - 99 %), and ~ 28 % of inclusions are trace-element... MA NU SC R The Juina region in Mato Grosso State, Brazil, has been studied extensively because of...alluvial diamond deposit, situated in Rondônia State, Brazil, lies approximately 250 km west of the Juina
	*Haggerty, Stephen E. (1994) Superkimberlites: A geodynamic diamond window to the Earth's core. Earth and Planetary Science Letters, 122 (1) 57-69 doi:10.1016/0012-821x(94)90051-5*	Journal (article/letter/editorial)
	of sulfides, silicate perovskite and wiistite-periclase mineral inclusions in diamonds. The most abundant...triggered contemporaneously on a global rather than a local scale [10]. Secondly, these global eruptive events...kimberlite spike (80-120 Ma) is prominent throughout Africa, North America, Brazil and Siberia; a second intrusive...360-320 Ma in Siberia; another is around 200 Ma in Africa, North America, Brazil and Siberia. Kimberlites...Australia and West Africa (Fig. 1). Among the oldest kimberlites are Kuruman (1.6 Ga), South Africa, and pipes
	*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
	Andrey V. Bobrov Department of Geology Moscow State University Moscow, Russia Luca Bindi Dipartimento...relevant protective laws and regulations and therefore free for general use. The publisher, the authors and...MgSiO3 perovskite Olivine Orthorhombic pyroxene Periclase Pyrope (Mg3Al2Si3O12) Pyroxene Ringwoodite Rutile...Superdeep diamonds from the Juina area, Mato Grosso State, Brazil. Contrib Min Petrol 140:734–753 Klemme S...Gottlob Lehmann (1719–1767) in the Beryozovskoye Mine (Ural Mountains, Russia) and initially used as a
	*Roeder, P. L., Schulze, D. J. (2008) Crystallization of Groundmass Spinel in Kimberlite. Journal of Petrology, 49 (8) 1473-1495 doi:10.1093/petrology/egn034*	Journal (article/letter/editorial)
	where the crystallization of spinel affects the local environment ahead of the growing spinel crystal...zoning and also on atoll-spinel formation. Very local conditions such as nucleation, or lack of nucleation...in the crystals therefore may be due to a very local effect caused by depletion of chromium in the immediate...(1995) Reid et al. (1975) in gold mine Igwisi Hills Tanzania, Africa Volcanoclastic and lava B. Dawson...(1997) Lace (II) Free State, SA Hypabyssal D. Schulze Schulze (2001) Leicester Mine Barkly West, SA

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Periclase from Koffiefontein Mine, Koffiefontein, Letsemeng Local Municipality, Xhariep District Municipality, Free State, South Africa

Periclase from
Koffiefontein Mine, Koffiefontein, Letsemeng Local Municipality, Xhariep District Municipality, Free State, South Africa