The PGE resources of the Great Dyke -
C Mwatahwa and C Musa
1 Presentation Overview PLATINUM
(2/2*,&$/(77,1* 758&785($1'75$7,*5$3+< ,1(5$/2*< • ((),1(5$/2*< • 5(,1(5$/2*< Ò5(6285&(6 ,1,1*Ä52&(66,1* • (() '(17,),&$7,21 • 3(1&$67,1,1* • 1'(5*5281',1,1* • 52&(66,1*
2 Geological Setting PLATINUM
5($7<.(,6$1(/21*$7(/$<(5(' ,17586,21Ì 1758'(' ,0%$%:($1$5&+$($1 &5$721*5$1,72,'6$1'*5((16721(%(/7 52&.6 03/$&(0(17$*( ÐÓÕÒ ±Ð$ÌÆ,1*$7(ÐÎÎÎËË%Ç :20$,1&+$0%(56:,7+),9( 68%&+$0%(56 0$//(676Ë$985$'21+$68%&+$0%(5Ê //8%&+$0%(56+$9( 5(6285&(6
3 Transverse Section PLATINUM
O 2&&856$7 6$0( /,7+2675$7,*5$3+,& 81,7,1$// 68%&+$0%(56 O 76%(+$9,285 )2//2:675(1'2) /$<(5,1*:,7+,1 Ï$1',6 6<00(75,&Ì O ,36$5(6+$//2: 5$1*,1*)520ÏÒ 72Î Stratigraphy PLATINUM
$),&81,7$77+(723 2:(5/75$0$),& 6(48(1&(P%52.(1,172 3<52;(1,7($1''81,7( 68&&(66,216 5(6285&(62&&85 1($57+(7232)7+( 8/75$0$),&68&&(66,21Ì
5 Local Stratigraphy PLATINUM
• Mafic unit up to 300 1200m thick at axis • Chromite seam at base of mafic unit • Mafic mainly gabbronorite –opx,cpx with plag • Upper P1 plagioclase websterite ±6m thick • Plagioclase websterite underlain by poikilitic plagioclase pyroxenite (so called bronzitite) • MSZ (2 3m)occurs at the top of the plagioclase pyroxenite unit and extends into the base of the websterite • MSZ can be correlated in all subchambers • The S1 Layer=MSZ Mineralogy PLATINUM
• 50% of PGEs associated with base metal sulphides(BMS). • Remainder of PGE associated with fine grained bismuthotellurides and arsenides.
• Pyrrhotite, Chalcopyrite, pentlandite and pyrite • Pyrrhotite is the dominant BMS • BMS grains are coarse (20 25 m).
• Silicate gangue mineralogy made up of pyroxene(dominant), plagioclase, chlorite ,tremolite and talc. PGM distribution PLATINUM PLATINUM MSZ reef Cross section Shurugwi Subchamber
9 PLATINUM Orebody Morphology PLATINUM Location of PGE resources
Location of economic PGE resources
11 Distribution of PGE resources per PLATINUM sub chamber
5%
13% Darwendale subchamber Shurugwi subchamber
Wedza subchamber
82%
PGE resources= 3.4billion tonnes
12 PLATINUM Distribution of PGE resources
13 PLATINUM Distribution of PGE resources-4E oz
12%
31% Anglo Platinum Zimplats Mimosa ZMDC JVs 4% 53%
4E resources= 411moz inclusive of oxide resources
4E= Pt +Pd+Au+Rh
14 Metal Profiles & Reef Idenfication PLATINUM Reef Identification PLATINUM PLATINUM ,1,1*87
17 PLATINUM 1'(5*5281',1,1*
• Mining layout consist of four bords up dip of the Strike Conveyor and two bords down dip of the Strike Conveyor. • Pillar dimension are 6m by 5m on strike and dip respectively • Bords span is 12m • Strike Conveyor Bord is 8m • Pillar holing is 6m • Total section width is 115 m skin to skin Mining Operations Underground and Surface PLATINUM
Annual 4E production to reach 1,000,000oz by 2013
19 PLATINUM Processing
• Unki Concentrator PLATINUM
• Thank you