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ADAro EnErgy 2013 AnnuAl rEporT
83
Coal resources as estimated at Dec. 31, 2012 Calculated changes to Adaro Energys coal resources 2013 vs. 2012
Total measured,
indicated inferred
Mt Measured
Mt Indicated
Mt Inferred
Mt Adaro
Energy ownership
equity Adaro Energy
attributable total
measured, indicated
inferred Mt Changes to
operating company total
measured, indicated
inferred Mt Changes to
operating company total
measured, indicated
inferred Changes to
Adaro Energy attributable
total measured, indicated
inferred Mt Changes to
Adaro Energy attributable
total measured, indicated
inferred
2,578 650
874 1,054
100 2,578
130 5
130 5
386 95
117 174
386 -14
-4 -14
-4 117
16 64
37 117
- -
- -
1,267 438
409 420
1,267 95
7 95
7 374
72 237
65 374
- -
- -
4,722 1,271
1,701 1,750
100 4,722
211 4
211 4
not acquired until April 25, 2013 62
- 46
- 21
- 16
- 90
- 67
- 4,722
1,271 1,701
1,750 100
4,722 383
340 7.2
1,401 526
683 193
90 1,261
- -
- -
1,817 858
808 151
1,635 -
- -
- 186
75 62
48 167
- -
- -
745 374
238 133
671 -
- -
- 2,696
1,307 1,186
202 2,426
- -
- -
1,093 712
223 157
984 -
- -
- 19
14 4
1 17
- -
- -
7,957 3,866
3,204 885
90 7,161
- -
- -
14 11
2 1
25 4
- -
- -
110 72
31 7
28 -
- -
- 10
10 3
- -
- -
80 80
20 -
- -
- 60
60 15
- -
- -
70 70
18 117
167 29.3
167 430
430 108
380 88
95.0 88
774 83
33 658
194 497
64 124
64
281 272.2
8.7 0.1
75 211
6.5 2
1.6 1
no resources estimated in 2012 no resources estimated in 2012
281 272.2
8.7 0.1
75 211
6.5 2
1.6 1
13,734 5,492
4,947 3,293
96.3 12,288
887 6.5
466 3.8
Notes
1 pT Adaro Energys coal resources refer to resources
generally suited to host open- pit mineable coal reserves
unless noted otherwise. pT Adaro Energys coal resources
reported according to JorC 2012 Edition, the Cp was
Joseph Crisostomo MAusIMM, of pT Adaro Eksplorasi
Indonesia, and the resources were estimated in March 2014.
Small differences are due to decimal place rounding.
2,3,4 pT Semesta Centramas, pT paramitha
Cipta Sarana and pT laskar Semesta Alam resources
were estimated and reported in June 2012 in accordance
with JorC 2004 Edition by John Devon of Marston Inc., a golder
company.
5 The Cp was peter Mucalo MAusIMM, of pT Adaro
Eksplorasi Indonesia, and the coal resources were estimated
in April 2013 according to JorC 2012 Edition.
6 Based on BHp Billitons 2012 and 2013 Annual report with
the permission of BHp Billiton. 7 luon metallurgical indicate
resources are designated as having potential to host
underground mining. 8 Bumbun: Increase in
coal resources was due to additional drilling and an
updated model. 9 Juloi northwest: Increase
in coal resources was due to additional drilling and an
updated model. 10 The resources were
estimated in november 2013, the Cp was John Devon
of Marston Inc., a golder company.
Coal reserves as estimated at Dec. 31, 2012 Calculated changes to Adaro Energys coal reserves 2013 vs 2012
Total proved probable
Mt Proved Mt
Probable Mt Adaro Energy
ownership equity
Adaro Energy attributable
total proved probable Mt
Changes to operating
company total proved
probable Mt Changes to
operating company
total proved probable
Changes to Adaro Energy
attributable total proved
probable Mt Changes to
Adaro Energy attributable
total proved probable
494 326
168 100
494 42
8 42
8 37
30 7
37 -4
-12 -4
-12 no reserves estimated in 2012
- no reserves estimated in 2013
391 275
116 391
-60 -18
-60 -18
no reserves estimated in 2012 -
no reserves estimated in 2013
921 631
291 100
921 -21
-2 -21
-2
no reserves estimated in 2012 75
- no reserves estimated in 201213
75 -
75.2 -
921 631
291 100
921 -21
-2 -21
-2
no reserves estimated in 2012 90
- no reserves estimated in 20122013
- -
- -
- -
- -
-
no reserves estimated in 2012 25
- no reserves estimated in 20122013
- -
- -
- -
- -
-
273 238
35 75
204 -19
-7 -14
-7 no reserves estimated in 2012
61 -
no reserves estimated in 20122013
273 238
35 75
204 -19
-7 -14
-7 1,194
869 326
94 1,125
-40 -3
-34 -3
Notes
1 The competent person Cp for pT Adaro indonesia
coal reserves was Shahzad Chaudari MAusIMM, who is an
employee of pT Alam Tri Abadi.
2 The Tutupan deposit increased by 42Mt due to
additional drilling and mine planning.
3 The north paringin deposit was depleted due to production.
4 The Wara I reserves decreased by 60Mt due to
a change in geotechnical assumptions used.
5, 6, 7 pT Semesta Centramas, pT paramitha
Cipta Sarana and pT laskar Semesta Alam are separate
Iups with an informal collective name of Balangan Coal.
8 The Cp for the pT Mustika Indah permai coal reserves
was leonard Dolby of Marston Inc., a golder company.
84
Ö× Ø
IABlE, STrong, EFFICIEnT
Quality of Adaro Energy Metallurgical Coal Resources Air Dried Basis
Operating company
Locality Coal quality estimated as at Dec. 31, 2013
Ash Volatile matter
Total sulphur
IndoMet Coal
1
Haju metallurgicalthermal 4.7
39.2 0.98
lampunut metallurgical 4.2
28.5 0.55
lampunut thermal no quality quoted
luon metallurgicalthermal 3.6
18.7 0.72
luon metallurgical
2
3.4 18.8
0.56 Bumbun metallurgicalthermal
3.5 17.7
0.76 Juloi northwest metallurgicalthermal
4.2 26.9
0.5
Quality of Adaro Energy Coal Resources Gross as Received Basis reported according to JorC Code 2012 Edition
Operating company Locality
Estimated as at Dec. 31, 2013 Total
moisture Ash
Volatile matter
Total sulphur
Calorific value Kcalkg
pT Adaro Indonesia
1
Tutupan 27.5
2.1 36.1
0.13 4,886
north paringin 29.3
3.2 33.5
0.22 4,737
South paringin 30.8
2.9 32.7
0.21 4,651
Wara I 39.0
3.1 30.5
0.24 3,975
Wara II 43.6
3.1 28.9
0.23 3,657
Total Adaro Indonesia thermal 32.1
2.6 33.8
