Mantle-related carbonados? Geochemical insights from diamonds from the Dachine komatiite (French Guiana)

Earth and Planetary Science Letters

Volumn 296, Issue 3-4, 2010, Pages 329-339

  Cartigny, P ^a  

^a INSTITUT DE PHYSIQUE DU GLOBE DE PARIS   (France)

Author keywords

Carbon isotopes; Carbonado; Dachine; Diamond; French Guiana; Komatiite; Nitrogen isotopes

Indexed keywords

CARBON ISOTOPES; CRYSTALLISATION; DIAMOND GRAINS; EARTH'S CRUST; EARTH'S MANTLE; FRENCH GUIANA; GEOCHEMICAL CHARACTERISTIC; GEOCHEMICAL FEATURES; HIGH TEMPERATURE; ISOTOPE COMPOSITIONS; ISOTOPE DISTRIBUTIONS; KOMATIITE; LARGE SIZES; LITHOSPHERIC; NITROGEN CONTENT; NITROGEN ISOTOPES; NITROGEN SPECIATION; POLYCRYSTALLINE DIAMONDS; STABLE ISOTOPES; TRANSITION ZONES;

ISOTOPES; MINERALS; NITROGEN; SINTERING;

DIAMONDS;

CARBON ISOTOPE; DIAMOND; GEOCHEMISTRY; ISOTOPIC COMPOSITION; KOMATIITE; LUMINESCENCE; NITROGEN ISOTOPE; STABLE ISOTOPE;

FRENCH GUIANA;

EID: 77954657157     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2010.05.015     Document Type: Article

References (124)

1. Arndt N.T., Albarède F., Cheadle M., Ginibre C., Herzberg C., Jenner G., Chauvel C., Lahaye Y. Were komatiites wet?. Geology 1998, 26:739-742.
2. Arndt N.T., Barnes S.J., Lesher C.M. Komatiite 2008, 488. Cambridge University Press, Cambridge.
3. Bailey, L.M., 1999. An unusual diamond-bearing talc schist from the Dachine area of French Guiana. Available at , MsC thesis, Queen's University, Kingston, Ontario, Canada. pp. 189. http://www.nlc-bnc.ca/obj/s4/f2/dsk2/ftp03/MQ37937.pdf.
4. Becker M., Le Roex A.P. Geochemistry of South African on- and off-craton, Group I and Group II kimberlites: petrogenesis and source region evolution. J. Petro. 2006, 47:673-703.
5. Bottinga Y. Carbon isotope fractionation between graphite, diamond and carbon dioxide. Earth Planet. Sci. Lett. 1969, 5:301-307.
6. Boyd S.R., Kiflawi I., Woods G.S. The relationship between infrared absorption and the A defect concentration in diamond. Phil. Mag. B 1994, 69:1149-1153.
7. Boyd S.R., Pineau F., Javoy M. Modelling the growth of natural diamonds. Chem. Geol. 1994, 116:29-42.
8. Bradford, P., 2000. Golden Star Resources Ltd - New release. available at: http://www.mbendi.com/a_sndmsg/news_view.asp?I=11001&PG=15.
9. Burgess R., Johnson L.H., Mattey D.P., Harris J.W., Turner G. He, Ar and C isotopes in coated and polycrystalline diamonds. Chem. Geol. 1998, 146:205-217.
10. Burgess R., Cartigny P., Harrison D., Hobson E., Harris J.W. Volatile composition of Canadian fibrous diamonds: implications for chemical and isotopic heterogeneity in the mantle. Geochim. Cosmochim. Acta 2009, 73:1779-1794.
11. Canil D. Vanadium partitioning and the oxidation state of Archaean komatiite magmas. Nature 1997, 389:842-845.
12. Capdevila R., Arndt N., Letendre J., Sauvage J.-F. Diamonds in volcaniclastic komatiite from French Guiana. Nature 1999, 399:456-458.
13. Cartigny P. Stable isotopes and the origin of diamonds. Elements 2005, 1:79-84.
14. 15N determinations. Chem. Geol. 1998, 147:147-159.
15. Cartigny P., De Corte K., Shatsky V.S., Ader M., De Paepe P., Sobolev N.V., Javoy M. The origin and formation of metamorphic microdiamonds from the Kokchetav massif, Kazakhstan: a nitrogen and carbon isotopic study. Chem. Geol. 2001, 176:265-281.
16. 13C-N concentrations in diamonds. Earth Planet. Sci. Lett. 2001, 185:85-98.
17. Cartigny P., Harris J.W., Taylor A., Davies R., Javoy M. On the possibility of a kinetic fractionation of nitrogen stable isotopes during natural diamond growth. Geochim. Cosmochim. Acta 2003, 67:1571-1576.
18. Cartigny P., Chinn I., Viljoen K.S., Robinson D.K. Early Proterozoic (> 1.8Ga) ultrahigh pressure metamorphism: evidence from Akluilâk microdiamonds (NW Canada). Science 2004, 304:853-855.
19. Cartigny P., Stachel T., Harris J.W., Javoy M. Constraining diamond metasomatic growth using C- and N-stable isotopes: examples from Namibia. Lithos 2004, 77:359-373.
20. 33, 34S- stable isotope systematics. Lithos 2009, 112:852-864.
21. Chrenko R.M., Tuft R.E., Strong H.M. Transformation of the state of nitrogen in diamond. Nature 1977, 270:141-144.
22. Clark C.D., Davey S.T. One-phonon infrared absorption in diamond. J. Phys. C: Solid State Phys. 1984, 17:1127-1140.
23. Corsetti F.A., Baud A., Marenco P.J., Richoz S. Summary of Early Triassic carbon isotope record. C. R. Palevol. 2005, 4:743-486.
24. Daulton T.L., Ozima M. Radiation-induced diamond formation in uranium-rich carbonaceous materials. Science 1996, 271:1260-1263.
25. Davies G. The A nitrogen aggregate in diamond-its symetry and possible structure. J. Phys. C 1976, 9:L537-L542.
26. De Corte K., Cartigny P., Shatsky V.S., Javoy M., Sobolev N.V. First evidence of the presence of inclusions in metamorphic microdiamonds from the Kokchetav-massif, northern Kazakhstan. Geochim. Cosmochim. Acta 1998, 62:3765-3773.
27. De Corte K., Cartigny P., Shatsky V.S., Sobolev N.V., Javoy M. Characteristics of microdiamonds from UHPM rocks of the Kokchetav massif (Kazakhstan). Proceedings of the 7th International Kimberlite Conference 1999, 174-182. Red Roof Design, Cape Town, Vol. 1. J.J. Gurney, J.L. Gurney, M.D. Pascoe, S.H. Richardson (Eds.).
28. De Corte K., Korsakov A., Taylor W.R., Cartigny P., Ader M., De Paepe P. Diamond growth during ultrahigh-pressure metamorphism of the Kokchetav Massif, northern Kazakhstan. Island Arc 2000, 9:428-438.
29. De S., Heaney P.J., Hargraves R.B., Vicenzi E.P., Taylor P.T. Microstructural observations of polycrystalline diamond: a contribution to the carbonado conundrum. Earth Planet. Sci. Lett. 1998, 164:421-433.
30. De S., Heaney P.J., Vicenzi E.P., Wang J. Chemical heterogeneity in carbonado, an enigmatic polycrystalline diamond. Earth Planet. Sci. Lett. 2001, 185:315-330.
31. De Stefano A., Kopylova M.G., Cartigny P., Afanasiev V. Diamonds and eclogites of the Jericho kimberlite. Contrib. Min. Petro. 2009, 158:295-315.
32. Deines P., Harris J.W., Gurney J.J. Depth-related carbon isotope and nitrogen concentration variability in the mantle below the Orapa kimberlite, Botswana. Africa. Geochim. Cosmochim. Acta 1993, 57:2781-2796.
33. Demouchy, S., 2000. Etude pétrographique et géochimique des komatiites volcanoclastiques et diamantifères de Guyane Française. MSc thesis, University Joseph Fourier, Grenoble, France, pp. 38.
34. Dismukes J.P., Gaines P.R., Witzke H., Leta D.P., Kear B.H., Behal S.K., Rice S.B. Demineralization and microstructure of carbonado. Mat. Sci. Eng. A 1988, 106:555-563.
35. Dobrzhinetskaya L.F., Liu Z., Cartigny P., Zhang J., Tchkhetia D., Hemley R.J., Green H.W. Synchrotron infrared and raman spectroscopy of microdiamonds from Erzgebirge, Germany. Earth Planet. Sci. Lett. 2006, 248:340-349.
36. Dobrzhinetskaya L., Wirth R., Yang J., Hutcheon I., Weber P., Green H.W. Osbornite (TiN) and boron nitride nanoinclusions in coesite from Tibet: a first record of nitrogen in a terrestrial ultrahigh pressure environment. American Geophysical Union, Fall Meeting 2007 2007, abstract #V43E-04.
37. Dyer H.B., Raal F.A., Dupreez L., Loubser J.H.N. Optical absorption features associated with paramagnetic nitrogen in diamond. Phil. Mag. 1965, 11:763-774.
38. Finnie K.S., Fisher D., Griffin W.L., Harris J.W., Sobolev N.V. Nitrogen aggregation in metamorphic diamonds from Kazakhstan. Geochim. Cosmochim. Acta 1994, 58:5173-5177.
39. Frantsesson E.V., Kaminski F.V. Carbonado-diamond variety of non-kimberlite genesis. Dokl. Akad. Nauk SSSR 1974, 219:187-189.
40. Fukura S., Nakagawa T., Kagi H. High spatial resolution photoluminescence and Raman spectroscopic measurements of a natural polycrystalline diamond, carbonado. Diamond Relat. Mater. 2005, 14:1950-1954.
41. Galimov E.M., Kaminskiy F.V., Kodina L.A. New data on carbon isotope composition of carbonado. Geo. Int. 1985, 22:723-726.
42. Galimov E.M., Sobolev N.V., Efimova E.S. Carbon isotopic composition of Venezuela diamond. Dokl. Aka. Nauk SSSR 1999, 364:101-106.
43. Garai J., Haggerty S.E., Rekhi S., Chance M. Infrared absorption investigations confirm the extraterrestrial origin of carbonado diamonds. Astrophys. J. 2006, 653:L153-L156.
44. Gautheron C., Cartigny P., Moreira M., Harris J.W., Allegre C.J. Evidence for a mantle component shown by rare gases, C and N isotopes in polycrystalline diamonds from Orapa (Botswana). Earth Planet. Sci. Lett. 2005, 240:559-572.
45. Gorshov A.I., Titkov S.V., Pleshakov A.M., Sivtsov A.V., Bershov L.V. Inclusions of native metals and other minerals phases into carbonado from the Ubangi region (Central Africa). Geol. Ore Deposits 1996, 38:114-119. (in Russian).
46. Gorshov A.I., Bershov L.V., Vinokurov S.F., Oton K.L., Sivtsov A.V., Mokhov A.V., Bogacheva E.O. Carbonado from the Lenkoish region, Bahia State (Brazil): mineral inclusions, physical properties, geochemical features, and formation conditions. Geol. Ore Deposits 1997, 39:229-236. (in Russian).
47. Haggerty S.E. Diamond-carbonado: geological implications and research-industrial applications. Proceedings of the 5th International Symposium on Advanced Materials 1998, 39-42.
48. Haggerty S.E. A diamond trilogy: superplumes, supercontinents, and supernova. Science 1999, 285:851-860.
49. Hall H.T. Sintered diamond: a synthetic carbonado. Science 1970, 169:868-869.
50. Harris J.W. Diamond geology. The properties of natural and synthetic diamond 1992, 345-393. Academic Press, Oxford, UK. J.E. Field (Ed.).
51. Heaney P.J., Vicenzi E.P., De S. Strange diamonds: the mysterious origins of carbonado and framesite. Elements 2005, 1:85-89.
52. Hough R.M., Gilmour I., Pillinger C.T., Arden J.W., Gilkes K.W.R., Yuan J., Milledge H.J. Diamond and silicon-carbide in impact melt rock from the Ries impact crater. Nature 1995, 378:41-44.
53. Hough R.M., Gilmour I., Pillinger C.T. Impact nanodiamonds in Cretaceous-Tertiary boundary fireball and ejecta layers: comparison with shock-produced diamond and a search for lonsdaleite. Meteor. Planet. Sci. 1998, 33:A70-A71.
54. Huppert H.E., Sparks R.S.J. Komatiites: 1. Eruption and flow. J. Petro. 1985, 26:694-725.
55. Irifune T., Kurio A., Sakamoto S., Inoue T., Sumiya H. Ultrahard polycrystalline diamond from graphite. Nature 2003, 421:599-600.
56. Jacob D., Viljoen K.S., Grassineau N., Jagoutz E. Remobilization in the cratonic lithosphere recorded by polycrystalline diamond (Framesite). Science 2000, 289:1182-1185.
57. Jacob D., Kronz A., Viljoen K.S. Cohenite and native iron inclusions in garnets from polycrystalline diamonds. Contrib. Min. Petro. 2004, 146:566-576.
58. Javoy M., Pineau F., Delorme H. Carbon and nitrogen isotopes in the mantle. Chem. Geol. 1986, 57:41-62.
59. Jeynes C. Natural polycrystalline diamond. Ind. Diamond Rev. 1978, 14-23.
60. Jones R., Briddon P.R., Öberg S. First-principles theory of nitrogen aggregates in diamond. Philo. Mag. Lett. 1992, 66:67-74.
61. Jones A.P., Milledge H.J., Beard A.D. New nitride minerals in carbonado diamond. Eighth International Kimberlite Conference Abstracts, Victoria, Canada, FLA_0167 2006, available at http://www.venuewest.com/8IKC/s3post.htm#3.P24.
62. Jones A.P., Dobson D., Wood I., Beard A.D., Verchovsky A., Milledge H.J. Iron carbide and metallic inclusions in diamonds from Jagersfontein. Ninth International Kimberlite Conference Extended Abstract, Frankfurt, Germany. Abstarct N° 9IKC-A-00360 2008, available at http://www.cosis.net/abstracts/9IKC/00360/9IKC-A-00360-1.pdf.
63. Kagi H., Fukura S. Infrared and Raman spectroscopic observations of Central African carbonado and implications for its origin. Eur. J. Min. 2008, 20:387-393.
64. Kagi H., Takahashi K., Hidaka H., Masuda A. Chemical properties of Central African carbonado and its genetic implications. Geochim. Cosmochim. Acta 1994, 58:2629-2638.
65. Kagi H., Sato S., Akagi T., Kanda H. Generation history of carbonado inferred from photoluminescence spectra, cathodoluminescence imaging, and carbon-isotopic composition. Am. Min. 2007, 92:217-224.
66. Kaiser W., Bond L. Nitrogen, a major impurity in common Type I diamonds. Phys. Rev. 1959, 115:857-863.
67. Kaminsky F.V. Carbonado and yakutite: properties and possible genesis. Diamonds: Characterization, Genesis and Exploration 1991, 136-143. CPRM Special Publication, Araxa, Brazil. H.O.A. Meyer, M.O.H. Leonardos (Eds.).
68. Kaminsky F.V., Zakharchenko O.D., Griffin W.L., Channer D.M.D.R., Khachatryan-Blinova G.K. Diamonds from the Guaniamo area, Venezuela. Can. Min. 2000, 38:1347-1370.
69. Kamioka H., Shibata K., Kajizuka I., Ohta T. Rare-earth element patterns and carbon isotope composition of carbonados: implications for their crustal origin. Geochem. J. 1996, 30:189-194.
70. Kaner R.B., Gilman J.J., Tolbert S.H. Designing superhard materials. Science 2005, 308:68-69.
71. Kent A.J.R., Hauri E., Woodhead J., Hergt J.M. Volatile contents of Belingewe Komatiites: mantle volatile contents and the effects of degassing. Geochim. Cosmochim. Acta 2009, 73:A640.
72. Kerr P.F., Graf D.L., Ball S.H. Carbonado from Venezuela. Am. Min. 1948, 33:251-255.
73. Kiflawi I., Mayer A.E., Spear P.M., Van Wyk J.A., Woods G.S. Infrared absorption by the single nitrogen and A defect centres in diamond. Phil. Mag. B 1994, 69:1141-1147.
74. Kiflawi I., Kanda H., Fisher D., Lawson S.C. The aggregation of nitrogen and the formation of A centres in diamonds. Diamond Relat. Mater. 1997, 6:1643-1649.
75. Kiflawi I., Kanda H., Mainwood A. The effect of nickel and the kinetics of the aggregation of nitrogen in diamond. Diamond Relat. Mater. 1998, 7:327-332.
76. King J.M., Shigley J.E., Gelb T.H., Guhin S.S., Hall M., Wang W. Characterisation and grading of natural-color yellow diamonds. Gems Gemology 2005, 41:88-115.
77. Kirkley M.B., Gurney J.J., Rickard R.S. Jwaneng framesites: carbon isotopes and inclusion compositions. Diamonds: Characterization, Genesis and Exploration 1991, 127-135. CPRM Special Publication, Araxa, Brazil. H.O.A. Meyer, M.O.H. Leonardos (Eds.).
78. Kletetschka G., Taylor P.T., Wasilewski P.J., Hill H.G.M. Magnetic properties of aggregate polycrystalline diamond: implications for carbonado history. Earth Planet. Sci. Lett. 2000, 181:279-290.
79. Koeberl C., Masaitis V.L., Shafranovsky G.I., Gilmour I., Langenhorst F., Schrauder M. Diamonds from the Popigai impact structure, Russia. Geology 1997, 25:967-970.
80. Leung I., Guo W.X., Friedman I., Gleason J. Natural occurrence of silicon-carbide in a diamondiferous kimberlite from Fuxian. Nature 1990, 346:352-354.
81. Maruoka T., Kurat G., Dobosi G., Koeberl C. Isotopic composition of carbon in diamonds of diamondites: record of mass fractionation in the upper mantle. Geochim. Cosmochim. Acta 2004, 68:1635-1644.
82. McCall G.J.H. The carbonado diamond conundrum. Earth Sci. Rev. 2009, 93:85-91.
83. McCandless T.E., et al. Some initial observations on polycrystalline diamonds mainly from Orapa. Extended Abstracts, Workshop on Diamonds, 28th International Geological Congress, Washington, D.C 1989, 47-51.
84. McCandless T.E., Letendre J., Eastoe C.J. Morphology and carbon isotope composition of microdiamonds from Dachine, French Guiana. Proceedings of the 7th International Kimberlite Conference 1999, 550-557. Red Roof Design, Cape Town. J.J. Gurney, J.L. Gurney, M.D. Pascoe, S.H. Richardson (Eds.).
85. Mc Kenna N., Gurney J.J., Klump J., Davidson J.M. Aspects of diamond mineralisation and distribution at the Helam Mine, South Africa. Lithos 2004, 77:193-208.
86. Moriyoshi Y., Kamo M., Setaka N., Sato Y. The microstructure of natural polycrystal diamond, carbonado and ballas. J. Mater. Sci. 1983, 18:217-224.
87. Navon O., Hutcheon I.D., Rossman G.R., Wasserburg G.J. Mantle-derived fluids in diamond micro-inclusions. Nature 1988, 355:784-789.
88. Orlov Y.L. The Mineralogy of the Diamond 1977, 235. Wiley, New York.
89. Ott U. Isotopes of volatiles in pre-solar grains. Space Sci. Rev. 2003, 106:33-48.
90. Ozima M., Tatsumoto M. Radiation-induced diamond crystallization: origin of carbonados and its implications on meteorite nano-diamonds. Geochim. Cosmochim. Acta 1997, 61:369-376.
91. Ozima M., Zashu S., Tomura K., Matsuhisa Y. Constraints from noble-gas contents on the origin of carbonado diamonds. Nature 1991, 351:472-474.
92. Pattison D.R.M., Levinson A.A. Are euhedral microdiamonds formed during ascent and decompression of kimberlite magma? Implications for use of microdiamonds in diamond grade estimation. Appl. Geochem. 1995, 10:725-738.
93. Parman S.W., Grove T.L., Dann J.C. The production of Barberton komatiites in an Archean subduction zone. Geophys. Res. Lett. 2001, 28:2513-2516.
94. Parman S.W., Grove T.L., Dann J.C., de Wit M.J. A subduction origin for komatiites and cratonic lithospheric mantle. South Afr. J. Geol. 2004, 107:107-118.
95. Payne J.L., Kump L.R. Evidence for recuurrent Early Triassic massive volcanism from quantitative interpretation of carbon isotope fluctuations. Earth Planet. Sci. Lett. 2007, 256:264-277.
96. Reutsky V.N., Logvinova A.M., Sobolev N.V. Carbon isotopic composition of polycrystalline diamond aggregates with chromite inclusions from the Mir kimberlite pipe. Yakutia. Geo. Int. 1999, 37:1073-1078.
97. Robinson D.N. The characteristics of natural diamond and their interpretation. Minerals Sci. Eng 1978, 10:55-72.
98. Robinson D.N., Gurney J.J., Shee S.R. Diamond eclogite and graphite eclogite xenoliths from Orapa, Botswana. Kimberlites: II. The Mantle and Crust-Mantle Relationships. Proceedings of the 3rd International Kimberlite Conference, Elsevier, Amsterdam 1984, 11-24. J. Kornprobst (Ed.).
99. Rondeau B., Sautter V., Barjon J. New columnar texture of carbonado: cathodoluminescence study. Diamond Rel. Mater. 2008, 17:1897-1901.
100. Russell S.R., Arden J.W., Pillinger C.T. A carbon and nitrogen isotope study of diamond from primitive chondrites. Meteor. Planet. Sci. 1996, 31:343-355.
101. Sano Y., Yokochi R., Terada K., Chaves M.L., Ozima M. Ion microprobe Pb-Pb dating of carbonado, polycrystalline diamond. Prec. Res. 2002, 113:155-168.
102. Shelkov D.A., Verchovsky A.B., Milledge H.J., Pillinger C.T. Carbonado: a comparison between Brazillian and Ubangui sources with other forms of microcrystalline diamond based on carbon and nitrogen isotopes. Russ. Geol. Geophys. 1997, 38:332-340.
103. Shelkov D.A., Verchovsky A.B., Milledge H.J., Kaminsky F.V., Pillinger C.T. Carbon, nitrogen, argon and helium study of impact diamonds from Ebeliakh alluvial deposits and Popigai crater. Meteor. Planet. Sci. 1998, 33:985-992.
104. Shibata K., Kamioka H., Kaminsky F.V., Koptil V.I. Rare earth element patterns of carbonado and yakutite: evidence for their crustal origin. Min. Mag. 1993, 57:607-611.
105. 2-rich komatiitic melt inclusions in Cr-spinels within beach sand from Gorgona Island, Colombia. Earth Planet. Sci. Lett. 2009, 288:33-43.
106. Smith J.V., Dawson J.B. Carbonado: diamond aggregates from early impacts of crustal rocks. Geology 1985, 13:342-343.
107. Smith W.V., Sorokin P.P., Gelles I.L., Lasher G.J. Electron-spin resonance of nitrogen donors in diamond. Phys. Rev. 1959, 115:1546-1552.
108. Stachel T., Harris J.W. The origin of cratonic diamonds-constraints from mineral inclusions. Ore Geol. Rev. 2008, 34:5-32.
109. Stachel T., Brey G.P., Harris J.W. Inclusions in sublithopsheric diamonds: glimpses of deep mantle. Elements 2005, 1:73-78.
110. Sunagawa I. Growth and morphology of diamond crystals under stable and metastable conditions. J. Cryst. Growth 1990, 99:1156-1161.
111. Svisero D.P. Distribution and origin of diamonds in Brazil: an overview. J. Geodyn. 1995, 20:493-514.
112. Tappert R., Stachel T., Harris J.W., Muehlenbachs K., Ludwig T., Brey G.P. Diamonds from Jagersfontein (South Africa): messengers from the sublithospheric mantle. Contrib. Mineral. Petro. 2005, 150:505-522.
113. Taylor W.R., Canil D., Milledge H.J. Kinetics of Ib to IaA nitrogen aggregation in diamond. Geochim. Cosmochim. Acta 1996, 60:4725-4733.
114. Thomassot E., Cartigny P., Harris J.W., Viljoen K.S. Methane-related diamond crystallization in the Earth's mantle. Earth Planet. Sci. Lett. 2007, 257:362-371.
115. Thomazo C., Pinti D.L., Busigny V., Ader M., Hashizume K. Biological activity and Earth's surface evolutions: insights from carbon, sulfur, nitrogen and iron stable isotopes in the rock record. C. R. Palevol. 2009, 8:665-678.
116. Trueb L.F., DeWys E.C. Carbonado: natural polycrystalline diamond. Science 1969, 165:799-802.
117. Trueb L.F., Butterman W.C. Carbonado: a microstructural study. Am. Min. 1969, 54:412-425.
118. Trueb L.F., DeWys E.C. Carbon from Ubangi-a microstructural study. Am. Min 1971, 56:1252-1268.
119. Vinogradov A.P., Kropotova O.I., Orlov Y.L., Grinenko V.A. Isotopic composition of diamond and carbonado crystals. Geo. Int. 1966, 3:1123-1125.
120. Vins V.G. On the transformation of optically active defects in diamond crystal lattice. Diamond Relat. Mater. 2004, 13:732-735.
121. Wentorf R.H., DeVries R.C., Bundy F.P. Sintered superhard materials. Science 1980, 208:873-880.
122. Woods G.S. Platelets and the infrared absorption of type Ia diamonds. Proc. R. Soc. London 1986, A407:219-238.
123. 13C and nitrogen concentration associated with textural heterogeneities of carbonado. Can. Min. 2008, 46:1283-1296.
124. Zack T., Moraes R.R., Kronz A. Temperature dependence of Zr in rutile: empirical calibration of a rutile thermometer. Contrib. Min. Petro. 2004, 148:471-488.