International

Kimberlite

Conference

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/

y

Digitized by the Internet Archive in 2018 with funding from University of Alberta Libraries

https://archive.org/details/sixthinternation06inte

SIXTH INTERNA TIONAL KIMBERLITE CONFERENCE

Novosibirsk, August 1995

EXTENDED ABSTRACTS

RUSSIA

ORGANIZING COMMITTEE

Additional copies and other volumes associated with Conference may be purchased from:

United Institute of Geology, Geophysics & Mineralogy, Universitetsky pr. 3, Novosibirsk 90, 630090, Russia TeL: (007) 3832-354655 Fax: (007)-3832-352692

Copyright © 1995 by United Institute of Geology, Geophysics and Mineralogy, Siberian Branch of Russian Academy of Sciences

All Extended Abstracts in this volume were submitted by the authors in camera-ready form. There has been no editing of the Extended Abstracts and they have not been subject to review. The Organizing Committee of the 6th International Kimberlite Conference takes no responsibility for authors errors and omissions.

SIXTH INTERNATIONAL KIMBERLITE CONFERENCE

Organizing committee

Chairman: N.V. Sobolev (Novosibirsk)

Vice-Chairman: B.A.Yatskevich (Moscow) VAZharikov (Moscow) V.M.Zuev (Mirny)

Secretary: N.P.Pokhilenko (Novosibirsk)

International Treasurer: H.O.Meyer (USA)

Local Treasurer: 0 AKozmenko (Novosibirsk)

Members: V.P Afanasyev (Novosibirsk) V.PAreshchenko (Novosibirsk) Y.M.Dauev (Moscow)

V.P. Grib (Arkhangelsk)

L.B. Gurevich (Moscow)

B.V. Oleinikov (Yakutsk)

A. F. Safronov (Yakutsk)

B. N.Scorik (Kokchetav) V.S.Shatsky (Novosibirsk)

A. V. Sinitsyn (St. Petersburg)

V.l. Vaganov (Moscow)

R.l. Volkov (Moscow)

N.N. Zinchuk (Mirny)

Author Index

Afanasiev V.P

1.32,287,657

Burgess S.R.

83,86

Ahmed Z.

4

Burlini L.

95

Altukhova Z.A.

5

Canil D.

611

An V.V.

132

Carlson J.A.

98,158

Andre L.

17,20,146

Carlson R.W.

427

Araujo D P

181

Cartigny P.

578

Arima M.

8,11,669

Carvalho J.B.

101,320

Armstrong K.A

14

Chashka A 1.

104,413,541,606

Ashchepkov I V.

17,20,95,249

Chatterjee B.

106,266

Ashley R.M.

98,158

Chepurov A.A.

31

Avdeyev A.V.

496

Chepurov A. 1.

109,626

Avery R.W.

543

Cherny S.D

592

Azbel K.A.

496

Chevallier L.

110

Babeyko A.Yu.

561

Chinn I.L.

113,116,359

Babich Y.V.

23

Clayton R.N

41

Babushkina S.A.

25

Clayton R.N.

549

Bagdasarov E.A.

28

Coleman R.G

687

Bagryantsev D.G.

31

Compston W.

285

Ballhaus C.

356

Coopersmith H.G.

.118

Balykin P.A.

449

Crozaz G.

549,625

Banzeruk VI.

32,287

Daniels L.R.M.

121,289,292

Barankevich V.G.

564, 569

Dautria J.M.

44

Barashkov Y.P.

•5,34

Dawson J.B.

124

Barton E.S.

37

Deines P.

126,549

Baryshev AS.

38

Demaiffe D.

129,146

Baumgartner M.C.

40

Devyatkin V.N.

132

Beard B. L.

41,549

Dino R.

323

Bedini R.M.

44

Dneprovskaya L.R.

564,566

Bekmukhametov A.E.

47

Dobrzhinetskaya L.F.

452

Bekmukhametova Z.A.

47

Dobson D.

269

Bell D.R.

50,52,546

Doroshev AM.

135,643

Bershov L.V.

187,389

Dreibus G.

138,141

Bizzi L. A.

55,436

Duchkov A.D.

143

Bobrievich A.P.

104

Dummett H.T.

158

Bodinier J.L.

44

Egorov K.N.

152,566

Bogina M.M.

506

Etemova T.E.

311

Borisov A.V.

410

Elfadili S.

146

Borzdov Yu.M.

135,415

Erinchek Yu.M.

149

Botova M.

680

Ernst W.G.

687

Bottazzi P.

700

Fedorov l.l.

109

Boyd F.R.

57,239,424,427,524

Feldman A.A.

649

Boyd S.R.

225,228

Feoktlstov G.D.

152

Boyko A N.

649

Field M.

155

Brakhfogel F.F.

37,60,63,275,678

Fipke C.E.

158

Brenker F.

66

Fitzsimmons 1.

242

Brey G.P.

66,80,138,169,263,308,333,356,643

Foley S.F.

161,164,700

Bristow J.W.

69

Fomin A.S.

167

de Bruin D.

71,121

Foumelle J.H.

371

Budaev D.A.

650

Franz L.

169,308,333

Bui A.N.

449

Fraracci K.N.

41

Bulanova G.P.

74,77,191,231,384.608

Fricke K.

356

Bulatov V.K.

80

Gababotse J.

155

Burgess R.

89,92

GaftM.

172

Garanin V.K.

175,177

Ivanov M.V.

396

Garrit D.

179

Ivanova V'.l.

254

Gaspar J.C.

181.184,498

Ivlev R.R.

496

Gibson J.G.

155

Jacob D.E.

257

Gibson S.A.

320

Jagoutz E.

141,205,257,512

Girnis A.V.

80,138,356

James D.

124

Golubev Yu.K.

649

Janse A.J.A.(Bram)

260

Gonzaga G.M.

184

Jarick J.

263

Gopalan K.

307

Jelinek E.

371

Gorshkov A.I.

187

Jenner G.A.

164

Gossler

703

JhaN.

106,266

Graham C.M.

83

Jones A.P.

269

Green R.W.E.

188,656

Jones M.Q.W.

188

Grib V.

487

Kagan B.

172

Griffin B.J.

74, 191,1 98,266,275,623,631

Kameristova S.G.

496

Griffin W.L.

118,179,194,196,201,203

Kaminsky F.

194

362,407,476,487,575

Kampala M.

129

Grosch U.

353

Kamperman M.

623

Gubar A.Y.

254

Kasimova F.l.

705

Gunther M.

205

Keller J.

263

Gurney J.J.

40,50,52,113,116,121,158,

Kelley S.P.

424

196,203,208,211,231,233

Kern H.

95

236,277,279,289,292,359

Khachatryan G.

680

368,614,617

Khan M.W.Y.

106

Gurney J.L.

211

Kharkiv A.D.

271,273,305,555,566

Gusak S.N.

643

Khiltova E.Yu.

396

Haggerty S.E.

126,214,217

Khokhryakov A. F.

135,415

Halliday A.N.

124,549

Khujwe P.

155

Hanna S.H.

220

KindR.

703

Harris C.

279

Kinny P.D.

198,275

Harris J.W.

208,242,441,578

Kirkley MB.

98,158,231,277

Harte B.

83,86,242,617

Kisilev A.I.

569

Hawkesworth C J.

430

Kiviets G.B.

279,617

Heaman L.M.

223

Kleyenstueber A.

292

van Heerden L.A.

225,228,231

Knyaz'kov A.P.

105

Heimstaedt H.H.

14,233

Knyazev G.l.

606

Hertogen J.

129

Kolebaba M R.

98

Hildebrand P.R.

236

Kolesnik Yu.N.

282

Hill S.J.

277

Konev A.A.

152

Hoal B.G.

239

Konzett J.

164,285

Hoal K.E.O.

239

Koptil V.l.

32,287,657

Hoang H.T.

449

Kopylova M.G.

289,292

Hoang V.H.

449

Kornilova V.P.

295,307

Holopova E.V.

345

Kosarev G.L.

656

Hops J.J.

86

Kostrovitsky S.l.

298,301,303

Horn 1.

161

Kovalevski A.Ph.

496

Hutchison M.T.

242

Kozmenko O.A.

512

Hutchison R.

387

Kruchkov A.I.

287,305

IjewliwO.J.

245

Krylov S.V.

592

Ilupin I.P.

248

Kumar A.

307

Inoue M.

8

Kurszlaukis S.

308,333

Ionov D A.

249

Kuznetsova L.G.

650

Irving A.J.

430

Kvasnitsa V.N.

32

Ishbulatov R.A.

252

van der Laan S.R.

161

Ivanov A.A.

254

Lapushkov V.

680

Lashenov V.A.

492

Milshtein E D.

149

Lavrova L.D.

311

Mineeva R.M.

389

Laz*ko E.E.

462,506

Mitchell R.G.

301

Le Roex A.P.

50

Mitchell R.H.

223,390

Leahy K

314

Moore R.O.

50,52,98,158,196,

Lebed N.l.

606

Mordvinova V.V.

569

Lee D.C.

198,317

Moreau J.

129

Letyukh M l

399

Moroz I.S.

254

Leonardos O H.

101,320,323,600

Morten L.

44

Letnikov F A.

326

Muller M.

188

Liou J.G.

328,687

Muller W.F.

66

Lipskaya V I.

564

Nadezhdina E.D.

311,452

Litasov K.D.

17,20

Nash W.P.

393

Liu G.

684

Nasurdinov T.G.

32

Logvinova A M.

331

Nenashev N.l.

63

Lorenz V.

333

Ngo T.P.

449

Loubser J.M.

653

Nguyen T.Y.

449

LuF.

336,690

Nicolaysen L.O.

656

Luchin A M.

1

255

Nikitina L.P.

396,535

Lukiyanova L.l.

28,410

Nikulin V.l.

399

Macdonald 1.

198

Nixon P.H.

623

MacFadyen D.A.

260

Norton D.

402

Maholkin I.L.

339,342

Novak N.A.

260

Makhin A.I.

558

O’Neill H.St.C.

362

Markov B.A.

•345

O'Reilly S.Y.

179,194,203,249.407,487

Malkovets V.G.

17,20

Ogasawara Y.

328

Mamonov Ye.P.

496

Ohtani E.

669

Manakov A.U.

348

Okrusch M.

169

Marakushev A.A.

350

Oleinikov B.V.

406

Marfunin A.S.

187,389

Oleinikov O.B.

307,404

Mashak J.M.

410

Olofinsky L.N.

649

Massone H.J.

353

Ong N.

460

MatsevK.

680

Orlov D.M.

41 C

Mattey D.P.

92,623,700

Orlova M.P.

410

Mattioii G.S.

52

Orr R.G.

543

Matveev S.

356

Otter M.L.

208

Matveev V.D.

592

Padmakumari V.M.

307

Mayeda T.K.

41,549

Pal’yanov Yu.N.

135.415,628

McCallum M.E.

113,118,359

Palkina E.Yu.

413

McCammon C.A.

359,365

Paneyakh N.A.

350

McCandless T.E.

365,368,393,402

Panina L.l.

418,421.449

McDonald J.A.

444

Parasotka B.S.

592

Medaris L.G.

371

Paslick C.

124

Melnyk W.

444

Pearson D.G.

57,239,424.427,430,524

Mendelssohn M.J.

374

Pearson G.D.

549

Meng Q.

690

Pearson N.J.

476

Menshagin Yu.V.

377,492

Pell J.A.

245,433

Menzies A.H.

121

Perdoncini L.C.

436

Menzies M.A.

690

Pertsev N.N.

350

Meyer H.O.A.

379,427

Petehnikov V.A.

311,439

Mikhailov M.V.

149

Petersen N.V.

656

Milashev V.A.

382

Petrova M.A.

311

Milledge H.J.

77,1 1 3,1 1 6,228,269,279,31 7,

Phillips D.

441

374,379,384,387,518,608

Pillinger C.T.

225,228,387,518

611,614,617,620,623,680

Pokhilenko L.N.

628

Pokhilenko N.P.

57,424,444,524,555

Polyakov G.V.

44®

Ponomarenko A.I.

462

Pooley G.D.

198,266

Popolitov K.E.

566

Posukhova T.V.

175,177,452

Presnall D.C.

11

Prikhod’ko V.S.

455

Prusakova N.A.

649

Ryabchikov I.D

706

Quick J.E.

506

RabeR.

269

Rapp R.P.

457

Read G.H.

52

Reddicliffe T.H.

317,460

Reimers L.F.

558

Richardson S.H.

121,279

Rickard R.S.

208,292

Rissanen J.

198

Robertshaw P.

543

Roden M.F.

462

Roeder P.L.

14

Rogers N.W.

430

Rogovoi V.V.

305

Romanov N.N

465,698

Romashkin A.I.

467

Rombouts L.

470

Rudnick R.L.

473

Ryan C.G.

118,194,201,203,476,487

Ryan C.J.

196

Rylov G.M.

479

Sablukov L.

487

Sablukov S.M.

481,487,515,342

Sablukova L.l.

484

Safronov A.F.

273,295,307,490,675,678

Sarelainen B.V.

506

Savrasov D.l.

695

Schulze D.J.

52,546

Scott-Smith B.H.

317,543

Sekerin A.P.

377,492

Seleznev V.S.

592

Selivanova V.V.

494

Seltverstov K.V.

496

Serenko V.P.

167,462,650

Sgarbi P.B.A.

498

Shadenkov E.M.

410

Shadrina V.A.

452

Shakhov G.P.

500

Shamshina E.A.

503

Sharkov E.V.

506

Sharygin V.V.

449,509

Shatsky V.S.

512,687

Shchukin V.S.

515

Shebanin A.P.

628

Shee S.H.

362

Shelkov D.

387,518

Shigley J.E.

521

Shimizu N.

50,52,524,526

Shirey S.B.

427

Shkodzinsky V.S.

529

Shoval S.

172

Simakov S.K

28,396,532,535

Sivtsov A.V.

187

Skinner E.M.W.

653

Smelova G.B.

538

Smelova L.V.

410

Smirnov G.l.

105,413,541,606

Smirnov S.G.

541

Smith Chris B.

106,266

Smith Craig B.

55,188,308,430,546

Snyder G.A.

41,549,552,555,625

Soares P.C.

436

Sobolev E.V.

479,680

Sobolev N.V.

23,41,57,194,257,331,

446,512,526,541,549,

552,555,558,625,687

Sobolev S.V.

561

Sobolev V.N.

41,549,552,555,625

Sokol A.G.

135,415

Sokolov Yu.M.

396

Sokolova L.S.

143

Soloviev V.M.

592

Solovjeva L.V.

564,566,569

Solyanik V.A.

681

Sonin V.M.

109

Sorowka A.

257

Speransky A.V.

389

Spetsius Z.V.

572,575,698

Stachel T.

333,578

Stanistreet I.G.

333

StawtcevA.L.

254

Stepashko A.A.

581

StolzJ.

339

Stmad J.G.

583

Sueno S.

663,666

Surin T.N.

586

Surkov N.V.

589

Sutherland F.L.

379

Suvorov V.D.

592

Suvorova L.F.

303

Sweeney R.J.

164,285

Sychkin G.N.

595

Tainton KM.

597

Takahashi E.

663,666

Tal’nikova S.B.

603

Tallarico F.H.B.

600

Taniguchi T.

269

Tarasyuk O.N.

413,541,606

Taylor L.A.

41,549,552,555,625

Taylor W.R.

113,116,191,231.269.279,

Wang W.

663,666

292,314,317,384,460,608

WankeH.

141

611,614,617,620,623,631

Ward L.M.

317

Teixeira N.A.

184,323

Weis D.

129

Thompson R.N

320

Widmer R

561

Thvetnov A.V.

254

Wilkes T.A.

155

Timirshin K.V.

592

Williams I S.

37

Titkov S.V.

187,389

Win T.T.

118,196,476,487

Tomilenko A.A.

628

deWitM.J

55

Tompkins L. A.

460

Woods P.A.

116,384,617

Tomshin M.D.

406

Xia W

336

Tran Q.H.

449

Xu Y.

690

Tran T.H.

449

Yamashita H

669

Trautman R.L.

631

Yanygin V.V.

672

Treschin N.N.

496

Yefimova E.S

512,526,558

Truckenbrodt J

356

Yurimoto H

666

Tsibulya L A.

634

Yurin Yu.A.

592

Tsyganov V. A.

Turkin A.I.

637,640

Yurjeva 0.

680

135,643

Zaitsev A.I

63,675,678

Turner G.

89,92

Zakharchenko 0 D

558,680

Turner P.H.

384

Zakusennyi V.l.

38

Urumov J.D.

38

Zaiishchak B L

681

Urumova G.l.

646

Zaritski A.I

104

Usova L.V.

558

Zeilic B.S.

682

Vaganov V.l.

648,649

Zhang H.

336,690

Valley J.W.

83

Zhang P.

684

Vannucci R.

700

Zhang R.Y

328,687

Varlamov V.A.

649

Zhao L.

336,690

Vasilenko V.B.

650

Zheng J.

336,690

Vavilov M.A.

512

Zherdev P.U.

342

Verchovsky A.B.

387,518

Zhitkov A N.

692,695

Viljoen K.S.

188,546,653

Zhuravlev D.Z.

339,342

Vinnik L.P.

656

Ziegenbein D.

356

Vishnevsky S.A.

657

Zinchuk N.N.

32,167,287,650,698

Vladimirov B.M.

152

Zinngrebe E.

700

Vladykin N.V.

660

Zotov I.A.

350

Von-der-Flaas G.S.

399

Zudin N.G.

34

Vu V.V.

449

Zuev V.M.

696

CONTENTS

Geological-mineralogical system of searching for diamond deposits . . . 1

A kimberlitic lamprophyre and associated alkalic basaltic rocks from Pishin District, Pakistan . 4

Reasons of variations of individual diamond crystals and petrogenetic blocking of rocks in Udachnaya pipe . 5

High pressure experimental study on growth and resorption of diamond in kimberlite melt . 8

Melting experiments on the join diopside-magnesite at 7 GPa and their bearing on the genesis of

kimberlite magmas.. . : . 11

The spinel mineralogy of the Cl 4 kimberlite, Kirkland Lake, Ontario, Canada. .. . . 14

Origin and evolution of mantle melts beneath Vitim Plateau. .. . . . . . 17

Stratification of upper mantle column beneath Vitim Plateau in Miocene and Quaternary . . . 20

Rutiles from eclogite xenoliths of Roberts Victor kimberlite pipe (S. Africa)... . 23

Some phlogopite formation stages (on the example of study of phlogopite from the pipe Mir).... . 25

Mineralogical and geochemical features of new province of alkali-ultramafic lamprophyres, lamproites and kimberlites of the Kola peninsula and Northern Karelia . . . . . . . . . . . . . 28

Experimental study of fluid conditions of diamond growth............ . . . . . . . 31

Comprehensive study of diamonds from difficult-to-dress source material . 32

Composition of garnets with diamond inclusions from Krasnopresnenskaya kimberlite pipe, Yakutia . 34

U-Pb zircon age for carbonatite and alkali-pikrite pipes, Orto-Yiarga Field (Yakutia), Russia . . . 37

Technique of a prognosis and prospering of diamond's host rocks on the south of Siberian platform . 38

The petrology and geochemistry of a polymict xenolith from the Kimberley Area, South Africa . . . ...40

Eclogites from the Mir kimberlite, Russia: evidence of an archean ophiolite protolith . . . 41

Superimposed metasomatic processes in the lithospheric mantle beneath the East African rift: a single melt source?.... . . . . . . . . . . . . . ......44

Petrology of carbon fractionization and geodinamic of its metamorphism during the diamonds formation . 47

Compositional evolution of the Monastery megacrysts and parent magma................ . . . . . . . 50

Geochemistry of Cr-poor megacrysts from the Lace (Group II) kimberlite, South Africa..... . . . . . 52

Isotope composition of the sub-continental lithosphere underlying the SW Sao Francisco craton

margin, Brazil: clues to the origin of EMI-type enriched mantle revervoirs... . . . . . . . 55

Peridotite xenoliths from Udachnaya kimberlite pipe . . . . 57

The age division of the kimberlitic and related magmatites in the N.-E. of the Siberian platform

(methods and results) . . . . . . . . . . . . . . .60

Isotopic dating of kimberlite and related rocks in the N.-E. the Siberian platform... . . . . . . . 63

Microstructures in minerals from the garnet Iherzolite body Alpe Arami (Central Alps)-Eyewitnesses

of upper mantle conditions and uplift history . 66

The proterozoic: its role in diamond petrogenesis and the emplacement of mantle derived intrusives . 69

Clinopyroxene megacrysts from the Kalkput kimberlite: a group 2 kimberlite from the Prieska group

of kimberlites . 71

The origin of complex "Agate” textures in octahedral diamonds from kimberlites . 74

Origin and history of growth of microdiamonds from Yakutian kimberlites . 77

Anhydrous partial melting of spinel Iherzolites from 3,5 to 20 kbar:- composition of partial melts . 80

Oxygen isotope composition of metasomatised mantle peridotite xenoliths - a laser f I uori nation and

ion microprobe study . 83

Irregular compositional zoning in garnets from metasomatised high-temperature peridotites from the Jagersfontein kimberlite pipe . 86

Halogen composition of mantle fluids in diamonds . . . . . . . . . 89

Helium, argon and carbon isotope constraints on the formation of cubic and polycryslalline diamond . 92

Seismic properties of continental mantle xenoliths at the garnet-spinel transition. An experimental study . 95

Geology and exploration of kimberlites on the BHP/DIA MET Claims, Lac de Gras region, Northwest

Territories, Canada . . . . . . . . . . . . . . . . . ..98

Preliminary geothermobarometric and metasomatism studies on mantle xenoliths of kimberlites

and associated rocks from the Alto Paranaiba, SE Brazil . . . . . . . . . . 101

Kimberlite magmatism of the Ukraine.. . . . . . . . . . . . . . . . . . . . 104

Kimberlites of Southeastern Raipur kimberlitic field, Raipur District, Madhya Pradesh, Central India . 106

Experimental simulation of diamond genesis....... . . . . . . . . . . . . . 109

Distribution and tectonics of kimberlites; a craton / off cratonstudy from South Africa.. . . . 110

COrbearing diamonds from the George Creek K1 kimberlite dyke of the Colorado-Wyoming State Line District . . . . . . . . . . . .....113

Cathodoluminescence of CO^bearing and CCLrfree diamonds from the George Creek K1 kimberlite

dyke, Colorado-Wyoming State Line District . . . . . . . 116

Trace elements in garnets and chromites from Colorado-Wyoming kimberlites as a guide to exploration . 118

Diamondiferous garnet macrocrysts in the Newlands kimberlite, South Africa- Rosetta stones from

the Kaapvaai craton . . . 121

Thermal anomaly in the upper mantle beneath a propagating continental rift: evidence from mantle

xenoliths from the Labait volcano, Northern Tanzania.................... . . . . . . . . . . . 124

Small scale oxygen isotope variations in ultradeep (>300 km) and transition zone xenoliths . 126

The Kundelungu kimberlites (Shaba, Zaire) petrology and geochemistry (trace elements and radiogenic isotopes): a review.. . 129

Permafrost-thermal conditions of kimberlite tubes of Yakutia . . . . . 132

Experimental investigation of joint crystallization of diamond with minerals of eclogites and peridotites 135

The role of carbon dioxide in the generation and enplacement of kimberlite magmas: new experimental data on CO2 solubility . . . 138

Water in the earth's mantle . . . 141

Thermal structure of lithosphere of Siberian platform . . . 143

Origin of eclogite nodules from the Mbujii Mayi kimberlites (Kasai, Zaire): subducted ancient oceanic crust? . 146

Conceptual approach to the problem of spatial distribution of different-rank kimberlite shows at ancient platforms.... . 149

Kimberlite and lamproite comparative petrogeochemistry . 152

The geology of the Orapa A/K1 kimberlite, Botswana: further insight into the emplacement of kimberlite

pipes . 155

History of the discovery of diamondiferous kimberlites in the Northwest Territories, Canada . . . 158

Experimental melting reactions in amphibole- and phlogopite-bearing mantle vein assemblages and

the trace element compositions of derived partial melts . . . 161

Trace element partitioning in natural phlogopite- and K-richterite-bearing xenoliths from Southern African kimberlites . . . . 164

Three series of kimberlite bodies from the Daldyn -Alakit region of Western Yakutia . 167

Metasomatic reequilibration of mantle xenoliths from the Gibeon kimberlite province (Namibia) . 169

Laseroluminescent sorting and identification of diamonds . 172

Morphology and growth history of diamonds in Arkhangelsk kimberlite pipes . . . 175

Typomorphism of microcrystalline oxides from kimberlite groundmass in Arkhangelsk kimberlite province . 177

Archean and Proterozoic mantle in West Greenland . . . . . . .....179

Reaction products of carbonatite with ultramafic rocks in the Catalao-I Complex, Brazil: possible

implications for mantle metasomatism . . . . . 181

Geotectonic considerations on primary diamond sources in mobil belts. . . . . . . . 184

Native metals Cr, Ni and a-Fe in cryptocrystalline diamonds (carbonado) from Yakutia . 187

Progress towards understanding the Kaapvaal lithosphere: geophysical and geochemical perspectives . . . .188

CL and FTIR mapping of nitrogen content and hydrogen distribution in a diamond from the Mir pipe - constraints on growth history . . ^ . 191

Mapping the Siberian lithosphere with garnets and spinels. . . . . . . . . . . . 194

Geochemistry of magnesian ilmenite megacrysts from Southern African kimberlites . . . . . 196

A new diamondiferous eciogite-bearing kimberlitic occurrence from Finland . . . . . . . 198

Trace elements in indicator minerals: area selection and target evaluation in diamond exploration . . . . . ....201

Lithosphere evolution beneath the Kaapvaal craton: 200-80 MA.

.203

Ages and processes as reported by isotopes of kimberlite derived low temperature Iherzolites . 205

Jwaneng diamond inclusions . 208

Garnet and ilmenite from some Premier kimberlite intrusives . 211

Petrochemistry of ultradeep (>300 km) and transition zone xenoliths . 214

Carbonado, clathrate and cavitation: a model for the acoustic induction of diamond . 217

The problem of diamondbearing in Syria . 220

Constraints on the emplacement age of Yakutian province kimberlites from U-Pb perovskite dating . 223

The carbon and nitrogen isotope characteristics of Argyle and Ellendale diamonds . 225

The fractionation of nitrogen and carbon stable isotope ratios in Western Australian diamonds . 228

Comparison of physical, spectroscopic and stable isotope characteristics of Roberts Victor diamonds . 231

Kimberlites - why, when and where? A hierarchy of geotectonic controls . 233

Lithosphere evolution in rifted, craton and mobil belt environments from Zimbabwe and implication for

diamond prospectivity . 236

Tectonic setting and mantle composition inferred from peridotite xenoliths, Gibeon Kimberlite field, Namibia . 239

Inferences on the exhumation history of lower mantle inclusions in diamonds . . . 242

The petrology of pre-orogenic alkaline and ultramafic lamprophyre diatremes in the Cordillera near

Golden, Southeastern British Columbia.... . 245

Geochemical and mineralogical pecularities of different-age kimberlites of Siberian province . . 248

Plagioclase-bearing Iherzolite xenoliths in alkali basalts from Hamar-Daban, Southern Baikal region, Russia . 249

Experimenral investigation on the interaction of carbonate melts with upper mantle rocks . 252

DCGF©METHOD - a new method for forecasting and search for deposits of diamonds . 254

Isotopic analysis (Sm/Nd, Rb/Sr and U/Pb) of single subcalcic garnet grains from Yakutian kimberlites . . . 257

Discovery of a new type of highly diamond if erous kimberlitic rock in the James Bay Lowlands, northern

Ontario, Canada . . . . . . . . . . . . . . . ...260

Isotopic and chemical composition of mega- and phenocrysts: evidence for the petrogenesis of the Hegau volcanic province . 263

Diamonds from kimberlites of Southeastern Raipur kimberlite field, Raipur District, Madhya Pradesh,

Central India . 266

Experimental nucleation and growth of diamond from carbonate-grafite systems . . . 269

Two series of megacrysts from kimberlites of the Verkhnemunskoye field (Republic of Sakha) . 271

Composition inhomogeneity of kimberlitic garnet nodules as an indicator of their metasomatism and

desint$g ration . 273

Shrimp U/Pb ages of perovskite and zircon from Yakutian kimberlites . . . 275

Diamond mining on kimberlite dikes of South Africa . . . 277

.279

A detailed geochemical study of a suite of.diamondiferous eclogite xenoliths from the Kaalvallei kimberlite, South Africa . . . . . .

Genetic classification of pyropes of the ultramafic rocks .

The correlation of kimberlite activity with mantle metasomatism .

Typomorphism of diamonds from kimberlite bodies and placers of the Yakutian diamondiferous province.

Mineral inclusions in diamonds from the River Ranch kimberlite .

The first finding of Cr-Sr-loparit e-type and Cr-chevkinite-type minerals in diamonds .

Kimberlites of Yakutia and South Africa. Aspects of comparative study .

Petrochemical and geochemical features of kimberlites of North-Russian province .

The trends of variability of garnet megacryst composition from diamond-bearing and diamond-devoid kimberlite pipes (Yakutia, Russia).... .

The Mela Sill as the carbonat if e-kimberlite body North-Russian province, Russia .

Dynamic effect of traps on kimberlites: identification of kimberlite klippen .

Precise Rb-Sr ages of Siberian Kimberlites . . .

Geochemistry and evolution of the ultrabasic Blue Hills intrusive complex (Namibia) .

New genetic type of diamond deposits - geological peculiarities and origin .

The influence of the deep structure of the Glennie Domain on the diamonds in Saskatchewan kimberlites .

The Merlin kimberlites, Northern Territory, Australia .

The diamond potential of the late cretaceous Alto Paranaiba igneous province, Brazil .

Geology and palinology of the Sant$ Clara kimberlite maar. Coromandel, Brazil .

To the problem of diamond genesis in the Kumdy-Kul deposit . .

Occurrence and stability of diamondbearing assemblages in ultrahigh-pressure metamorphic rocks .

Morphology and composition of mineral inclusions in chromite macrocrysts from kimberlites and lamproites.

Volcanology of the diatreme-rich carbonatitic Gross Brukkaros volcanic field and of the nearby Gibeon kimberlite province, Namibia.... . . . . .

Palaeozoic lithospheric mantle composition and processes beneath North China Platform .

Mantle sources of low-Ti lamproites from the mesozoic collision zone of the Aldan shield, East Siberia: geochemical and Sr-Nd-Pb isotope evidences............ . . . . . . . .

Geochemistry and Sr-Nd isotopic composition of kimberlites, melilitites and basalts from the Arkhangelsk region, Russia

Epochs and cycles of diamond genesis in cratons and mobile belts . . . . .

The structure of consolidated crust of the Yakutian diamondiferous province - Northern pert: evidence from geophysical investigations . •. . .

Petrology of diamondiferous magmatism . . . . . . . . .

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P-T evolution of palaeozoic garnet peridotites from the Saxonian Erzgebirge and the Aheim region, W. Norway.... 353

Synthesis of C-H-O fluids at high pressure . 356

Determination of the ferric iron content of diamond inclusions from George Creek using Mossbauer specrtoscopy with implications for mantle oxygen fugacity during diamond genesis . 359

Determination of ferric iron variation within zoned garnets from the Wesselton kimberlite using a Mossbauer milliprobe . 362

Sea floor hydrothermal vent systems: protoenvironment for 13C-depleted eclogitic diamonds . 365

Microdiamonds from kimberlites and lamproites: observations and ideas concerning their origin . 368

Thermobarometry and reconstructed chemical compositions of pyroxene-spinel symplectites: evidence

for pre-existing garnet in Iherzolite xenoliths from Czech Neogene lavas . . 371

Recent advances in the interpretation of the mid-infrared absorption spectra of diamond . 374

Composition and localization features of lamproites-like rocks in the Irkutsk Prisayanye area . 377

Unusual diamonds and unique inclusions from New South Wales, Australia . . . 379

Prediction of distribution and diamond potential of kimberlite provinces, fields and diatremes..... . 382

Internal morphology of yakutian diamonds - a cathodoluminescence and infrared mapping study . 384

Problems associated with the exictence of carbonado . . . . . 387

EPR-spectroscopy of Yakutian diamonds . . . . . . . 389

Compositional variation of micas in kimberlites, orangeites, lamproites and lamprophyres . 390

Geochemical and morphological evaluation of indicator mineral anomalies in Northeastern Utah and Southwestern Wyoming. USA . . . . . . . . . . . . . 393

Eclogites in the mantle: T, P and FG2 equilibrium conditions and depths of formation . 396

The stages of the native diamond deposits formation (Siberian platform) . . . 399

Kimberlites, fluids and diamonds: activity relations in the system Mg-Ca-AI-K-C-O-H . . . 402

Mineralogy of alkaline titanates-bearing kimberlite from a dike, West-Ukukit kimberlite field, Yakutia . 404

Basite magmatism of the Yakut kimberlite province . . . . . . . . . . . 406

4-D lithosphere mapping: constructing stratigraphic sections of the lower crust and upper mantle in space

and time . . . . . 407

Lamproites of Russia (geology, mineralogy, petrochemistry, geochemistry) . . 410

Typomorphizm of various genetic types of the Ukrainian diamonds . . . . . . . 413

Diamond morphology in growth and dissolution processes . 415

Genetic criteria of distinguishing lamproites (on the basis of melt inclusions in minerals)..... . . . ....418

Physico-chemical conditions of crystallization of low-titanium lamproites of Aldan (Siberia) . 421

Laser ^Ar/^Ar analyses of phlogopites from kimberlites and thier xenoliths: constraints on eruption ages of Southern African and Siberian kimberlites and mantle volatile compositions..... . 424

Re-Os isotope evidence for late Archaean. stabilisation of a thick lithospheric mantle keel beneath the Kirkland Lake area, Superior province, Canada. Further evidence for long-term crust-mantle cuopling . 427

Source regions of kimberlites and lamproites: constraints from Re-Os isotopes..... . 430

Kimberlites in the Slave structural province, Northwest Territories. Canada: a preliminary review . 433

Diamonds assotiated with the Permo-Carboniferous glacial deposits in the Parana Basin, Brazil . 436

Structure and peculiarities of formation the Kumdykolskoye deposit . . . . . . . 439

Geothermobarometry of diamond inclusions from the De Beers Pool Mines, Kimberley, South Africa . 441

Indicator minerals of CL-25 kimberlite pipe, Slave Craton, NWT, Canada. . . . . . . . .444

Mineralogical mapping of the North-East section of the Yakutian kimberlite province and its main results . 446

Geology and substance composition of cocites of North Vietnam.... . ? . . . 449

Morphology and growth conditions of diamonds in metamorphic rocks.... . . . . 452

Composition and structure of lithospheric mantle in the Pacific margin of Asia. .. . . . . . .....455

Is eclogite in the sub-continental lithosphere the residue from melting of subducted oceanic crust?

Experimental constraints and implications for the origin of the Archean continents . . . 457

The igneous rocks from Coanjula microdiamond deposit, Northern Territory, Australia.... . . . . .460

Mineralogy of peridotite xenoliths from the Mir kimberlite, Yakutia, Russia . . . . . . . . . . . 462

Deep structure of Yakutian diamondiferous areas: evidence from geophysical data . . . ...465

Perspectives for discovering kimberlitic and lamproitic magmatism in the Russian Far East . . ......467

Size and value distributions of diamonds . . . . .