Sumatra Regional Geochemical Survey CD-ROM Version 3.0: September 2007

BGS research – International geochemistry CD-ROM series

BGS was involved in Technical Co-operation projects in Sumatra with the Indonesian Ministry of Mines and Energy since 1975. This work has been supported with funding from the UK Department for International Development (DFID) (formerly Overseas Development Administration (ODA)). The objectives of this work were to assist Indonesia in its development by contributing to the regional geological, geochemical and geophysical mapping of Sumatra. The work was principally aimed at encouraging mining company activity to develop mineral resources in Sumatra. A major component of the co-operation was the training of Indonesian counterparts and encouraging institution-building processes.

There have been three major projects involving teams of resident BGS geoscientists based in the Geological Directorates in Bandung:

North Sumatra Project (NSP) 1975 – 1980

This project made regional geological maps and geochemical maps(based on stream sediments) at 1:250 000 scale for Sumatra north of the Equator. Each 1:250 k geological map is accompanied by a report and these are available for purchase from the GRDC library (at Jalan Diponegoro 57, Bandung). The 1:250 k quadrangle single element classified symbol geochemical maps are available (as an incomplete series) from the DMR library in Jalan Soekarno-Hatta 444. Most field maps and reports, sample powders, etc. are available in DMR by contacting the Head of the Geochemical and Minerals Information Sub-directorate in Bandung.

Northern Sumatra Geochemical and Mineral Exploration Project (NSGMEP) 1984 – 1988

The data generated by the North Sumatra Project was used as a basis for mineral exploration follow-up work in Sumatra north of the equator. A major objective in the work was the training of counterparts in methods of metalliferous mineral exploration and geochemical, geological and geochemical techniques were used. All mineral targets investigated are described in the NSGMEP report series which is available for inspection and copying at DMR Bandung (Geochemistry and Minerals Information Sub-directorate, Exploration Geochemistry Section retain the original maps and reports).

Southern Sumatra Geological and Mineral Exploration Project (SSGMEP) 1988 – 1994

This project was concerned with regional geological, geochemical and geophysical mapping of Sumatra south of the equator. This work commenced in the early 80’s and was helped to a successful conclusion with assistance from a team of BGS geoscientists. The geological work saw the completion of the 1:250 000 scale geological maps and reports. The regional geochemistry completed the regional geochemical mapping of Sumatra by stream sediment survey and the geophysicists compiled 1:250 000 Bouguer anomaly maps for some southern Sumatra quadrangles. Products are available for purchase as described for the North Sumatra Project, the geophysics maps also being available from GRDC.

The project’s geochemical, mineral occurrence and bibliographic databases were made available on the Sumatra CD-ROM database (versions 1.0 – 1.5). This CD-ROM is essentially an update of the geochemical databases that have been formatted to a consistent standard for both north and south of the equator. Grid references from the numerous UTM zones have been converted to longitude and latitude and a single database for the whole island of Sumatra is now available on this CD-ROM. This file is SUM98.XLS and can be found in the GEOCHEM directory. A coastline of Sumatra and the geochemical database are also included in MapInfo format.

Available digital text files from the SSGMEP are also included in the Reports directory. These were generally created in WordStar format and most have been converted to Word v 6.0 format. Report figures and maps not produced digitally are not included and should be obtained from the DMR office in Bandung.

The two most relevant references to the geochemical surveys in Sumatra are the atlases produced for north and south of the Equator are:

Stephenson B, Ghazali S A and Hariwidjaja (1982). Geochemical Atlas of Northern Sumatra. Regional Geochemical Atlas Series of Indonesia No. 1. Directorate of Mineral Resources, Bandung, Indonesia and British Geological Survey, Keyworth, United Kingdom.

Machali Muchsin, A, Johnson, C C, Crow, M J, Djumsari, A and Sumartono. 1997. Geochemical Atlas of Southern Sumatra. Regional Geochemical Atlas Series of Indonesia No. 2. Directorate of Mineral Resources, Bandung, Indonesia and British Geological Survey, Keyworth, United Kingdom.

During preparation of the CD-ROM the data has also been “cleaned” by replacing all 0 (below detection values) with a value 2/3rds the reported detection limits (rounded to an integer) i.e.

Cu21
Pb53
Zn53
Co21
Ni53
Mn5030
Ag1.00.7
Li10.7
K10070
Cr53
Fe0.1%0.07
As1.00.7
Mo0.50.3
Sn107
W2.51.7

Absent data in the database is represented by null values.

Each quadrangle database contains UTM grid co-ordinates based on the Bessel 1841 map datum. The southern Sumatra data covers two UTM zones, namely UTM zone 47 (Padang, Solok, Painan and Sungaipenuh) UTM zone 48 (remaining Southern Sumatra quadrangles). The northern Sumatra data comes from three UTM zones: zone 46 (part of Banda Aceh and Calang; zone 48 (Siak Sri Indrapura); and zone 47 (remaining quadrangles).

All the quadrangle databases from the island of Sumatra have been combined to give a single database using longitude/latitude grid co-ordinates (file SUM98.XLS). The process of combining data from different zones and the different data sets of N and S Sumatra is outlined below. The S Sumatra co-ordinates are generally considered to be more accurate and are based on the 1:250 000 AMS topographic maps. Hardcopy drainage basemaps for the S Sumatra data are available from DMR in Bandung as the single element proportional symbol maps at 1:250 000 scale. The N Sumatra data is not so accurate and originates from old Dutch topographic maps. However, drainage bases on which these locations are based are available from DMR as hardcopy, 1:250 000 scale maps.

The combined database on the CD-ROM for southern Sumatra (SSUM95.XLS) presents all the data on the basis of UTM zone 48 co-ordinates. This is really a non-linear correction but on a regional scale near the equator it is acceptable to make a correction by subtracting 667 652 from the EASTING field in the UTM zone 47.

In order to create a single database for N Sumatra the UTM 47 co-ordinates are used as most of the data is from this zone. To achieve this, subtract 665 091 from the Eastings x 10 of UTM 46 and add 667 854 to the Easting x 10 values of UTM 48. The Easting is multiplied by a factor of 10 so as to bring the co-ordinates to be 1 grid unit equivalent to 1 m and consistent with the Southern Sumatra databases.

In order to combine the N and S Sumatra data a correction also has to be made to the Northing. The equator is UTM Northing 0 for data from the northern hemisphere but UTM Northing 10 000 000 for data from the southern hemisphere. Therefore the 10 m has to be added or subtracted according to which hemisphere you are standardising on.

(i) Analytical Methods Used

Cu,Pb,Zn,Co,Ni,Mn,AgHot nitric acidAAS
Li,K,Cr,FeHot perchloric/hydrofluoric acidAAS
As,MoPotassium pyrosulphate/HClColorimetric
SnAmmonium iodide/HClColorimetric
WSodium bisulphateColorimetric

A summary of the analytical methods used in the analysis of the stream sediment samples (summarised from Davis and Hartati, 1991a).

(ii) Quadrangle Areas

Southern Sumatra Quadrangle Areas

Quadrangle Area (km²) Area Sampled (km²) Number of Samples Sampling density (no.per km²) Adjusted sampling density (no.per km²)
Padang (0715) 8,540 6,444 362 23.6 17.8
Solok (0815) 18,453 17,253 1,825 10.1 9.5
Rengat (0915) 17,465 4,326 309 56.5 14.0
Painan&M.Siberut (0714 & 0814) 17,650 15,171 1,869 9.4 8.1
Muarabungo&Jambi (0914 & 1014) 19,735 16,689 912 21.6 18.3
S.Penuh&Ketaun (0813 & 0812) 11,316 8,182 1,049 10.8 7.8
Sarolangun (0913) 18,460 14,962 1,268 14.6 11.8
Palembang (1013) 10,739 4,980 283 37.9 17.6
Bengkulu (0912) 17,645 15,946 1,139 15.5 14.0
Lahat (1012) 11,420 11,012 874 13.1 12.6
Manna (0911) 6,522 4,488 362 18.0 12.4
Baturaja (1011) 18,319 18,134 1,259 14,5 14.4
Kotaagung (1010) 9,315 8,725 726 12.8 12.0
Menggala&T’karang (1111 & 1110) 17,717 12,157 950 18.6 12.8
Total 203,296 158,469 13,187 15.4 12.0

A table summarising the sampling densities for the different quadrangle areas of Southern Sumatra. Padang, Solok, M.Siberut & Painan and S. Penuh & Ketaun are UTM Zone 47. The remaining quadrangles are from UTM Zone 48.

Southern Sumatra
Map showing Southern Sumatra Map Sheet Area

Northern Sumatra Quadrangle Areas

Quadrangle Name dbf Computer filename Number of samples
BANDA ACEH (A) QUADA46.DBF 510
BANDA ACEH (A) QUADA47.DBF 74
LHOKSEUMAWE (B) QUADB.DBF 226
CALANG (C) QUADC.DBF 256
MEULABOH/TAKENGON(D) QUADD.DBF 1530
LANGSA (E) QUADE.DBF 480
TAPAKTUAN (F) QUADF.DBF 326
MEDAN (G) QUADG.DBF 1156
T.TINGGI (H) QUADH.DBF 170
SIDIKALAN (K) QUADK.DBF 633
PEMATANGSIANTAR (L) QUADL.DBF 684
SIBOLGA (N) QUADN.DBF 133
PADANGSIDEMPUAN (P) QUADP.DBF 916
KOTATENGAH/DUMAI(Q) QUADQ.DBF 48
NATAL (T) QUADT.DBF 1334
PAKANBARU (U) QUADU.DBF 433
SIAK SRI INDRAPURA(V) QUADV.DBF 85

Quada46.dbf and Quadc.dbf data are from UTM zone 46 and Quadv.dbf is from UTM zone 48. The rest of the data comes from UTM zone 47.

Index Sumatra
Map showing N Sumatra Map Sheet Areas
  • Key to Quadrangle Codes used by North Sumatra Project (NSP)
NSP Code BAKOSURTANOL Code Quadrangle Name
A 0421 Banda Aceh
B 0521 Lhoksaumawe
C 0420 Calang(Lhokreuet)
D 0520 Takengon(Meulaboh)
E 0620 Langsa
F 0519 Tapaktuan
G 0619 Medan
H 0719 Tebingtinggi
K 0618 Sidikalang (Pangururan)
L 0718 Pematangsiantar (Tanjungbalai)
O&P 0617 & 0717 Sibolga & Padangsidempuan
Q 0817 Dumai (inc. Bagansiapi-api)
T 0716 Lubuksikaping (Natal)
U 0816 Pakanbaru
V 0916, 0917 & 1016 Siak Sri Indrapura (inc.Bengkalis & Tanjungpinang)

 

Summary of Southern Sumatra Regional Geochemical Mapping Project

Area Name: Southern Sumatra
Land Area: 203,296 km²
Date of Sampling:   1980 -1992
 UTM Grid Zones:  47M and 48M
Corner co-ordinates:
Minimum Longitude 99°E
Maximum Longitude 106°30’E
Minimum Latitude 6°S
Maximum Latitude 0° (Equator)
Drainage Basemap used: Edited 1:250,000 JANTOP TNI(1974) Topographic Maps
Sample Type: Stream sediment
Number of samples collected: 13,187
Sampling density: 1 sample per 15.4 km²
Adjusted sampling density (not incl.swamp, towns, etc): 1 sample per 12.0 km²
Sample fraction analysed: -80#
Chemical analyses: Directorate of Mineral Resources Laboratories, Bandung, Indonesia
 Elements determined:  Cu, Pb, Zn, Co, Ni, Mn, Ag, Li, K, Cr, Fe, As, Sn, Mo , W.

 

Reference to the CD-ROM should be as follows:

BGS (2007). Indonesia Regional Geochemical Survey CD-ROM: Sumatra. Version 3.0. BGS International Regional Geochemistry CD-ROM Series, No.1 Indonesia. British Geological Survey, Keyworth, Nottingham, UK

 

BGS Work in Indonesia

Central Enquiries
British Geological Survey
Keyworth, Nottingham NG12 5GG
United Kingdom
Tel: +44 (0)1159 363 143
Fax: +44 (0)1159 363 276
Email: enquiries@bgs.ac.uk

Collaborating organisation: Directorate of Mineral Resources, Bandung

Directorate of Mineral Resources Inventory (DMRI)
Jalan Soekarno-Hatta 444
Bandung 40254
Indonesia
Tel: +62 (0)22-5205572
Fax: +62 (0)22-5206263

Collaborating organisation: Geological Research and Development Centre, Bandung

Center for Geological Survey (CGS)
(Pusat Survei Geologi)
Geological Agency
Jalan Diponegoro 57
Bandung 40122
Indonesia
Tel. +62(0)22-7272601/7203205
Fax +62(0)22-7202669

…\content\*.* (INFORMATION FILES)

Filename Date Time Size(bytes) Description

  1. filelist.doc 21/10/2007 16:22:58 19968
  2. README.DOC 21/10/2007 16:23:30 186880
  3. README.pdf 27/09/2007 14:50:10 138681

…\Content\Geochemistry Data\*.* (Excel file containing all Sumatra digital geochemical data)

Filename Date Time Size(bytes) Description

  1. SUM98.XLS 04/05/1998 14:41:08 5059584

…\Content\Geochemistry Data\NSUMATRA\*.* (dbf files containing N Sumatra quadrangle data plus Excel file containing all N Sumatra data)

Filename Date Time Size(bytes) Description

  1. ACEH4696.DBF 15/11/1996 16:01:10 66464
  2. ACEH4796.DBF 15/11/1996 16:06:14 147513
  3. CALANG96.DBF 15/11/1996 16:08:18 131130
  4. DUMAI96.DBF 15/11/1996 16:09:46 147513
  5. LANGSA96.DBF 15/11/1996 16:10:48 131130
  6. LHOKSU96.DBF 15/11/1996 16:11:42 131130
  7. MEDAN96.DBF 15/11/1996 16:14:06 149798
  8. NATAL96.DBF 15/11/1996 16:15:46 147513
  9. NSUM96.XLS 15/11/1996 15:30:16 1545728
  10. PAKANB96.DBF 15/11/1996 16:17:58 56531
  11. PEMATA96.DBF 15/11/1996 16:18:38 88910
  12. PSIDEM96.DBF 15/11/1996 16:20:00 118838
  13. QUADA46.DBF 22/07/1993 18:24:16 75644
  14. QUADA47.DBF 22/07/1993 18:31:04 11552
  15. QUADB.DBF 22/07/1993 18:31:46 33896 2
  16. QUADC.DBF 22/07/1993 18:37:16 38306
  17. QUADD.DBF 22/07/1993 18:41:06 225584
  18. QUADE.DBF 22/07/1993 18:36:36 71234
  19. QUADF.DBF 21/07/1993 20:35:46 48596
  20. QUADG.DBF 21/07/1993 20:36:18 170606
  21. QUADH.DBF 21/07/1993 20:36:58 25664
  22. QUADK.DBF 21/07/1993 20:11:32 93725
  23. QUADL.DBF 21/07/1993 20:37:34 101222
  24. QUADN.DBF 21/07/1993 20:38:22 20225
  25. QUADP.DBF 21/07/1993 20:05:36 135326
  26. QUADQ.DBF 07/09/1993 08:42:20 7877
  27. QUADT.DBF 07/09/1993 08:41:36 196919
  28. QUADU.DBF 05/09/1993 20:54:16 64472
  29. QUADV.DAT 10/09/1993 08:32:10 12728
  30. QUADV.DBF 21/07/1993 19:56:50 13169
  31. SIAKSR96.DBF 15/11/1996 16:20:26 11894
  32. SIBOLG96.DBF 15/11/1996 16:25:58 17831
  33. SIDIKA96.DBF 15/11/1996 16:23:08 147513
  34. TAKENG96.DBF 15/11/1996 16:15:02 131130
  35. TAPAKT96.DBF 15/11/1996 16:24:52 43054
  36. TEBITI96.DBF 15/11/1996 16:21:58 22604

…\Content\Geochemistry Data\SSUMATRA\*.* \ (dbf files containing S Sumatra quadrangle data plus Excel file containing all S Sumatra data)

Filename Date Time Size(bytes) Description

  1. BAT94.DBF 27/01/1994 10:28:10 174592
  2. BEN93.DBF 30/11/1993 08:01:52 157952
  3. KAG93.DBF 22/12/1993 11:34:10 101376
  4. LAHAT93.DBF 30/11/1993 08:01:52 121382
  5. MANNA93.DBF 30/11/1993 08:01:52 51200
  6. MB&JAM94.DBF 02/02/1994 11:26:54 126626
  7. MENTKA95.DBF 22/12/1995 09:37:52 132008
  8. PAD93.DBF 30/11/1993 08:01:52 50726
  9. PAI93.DBF 30/11/1993 08:01:52 259072
  10. PAL93.DBF 25/11/1993 17:38:00 39824
  11. RENG93.DBF 30/11/1993 08:01:52 43412
  12. SAR93.DBF 21/12/1993 07:37:52 175754
  13. SOL93.DBF 30/11/1993 08:01:52 252620
  14. SSUM94.DBF 22/12/1995 09:39:10 1820576
  15. SSUM95.XLS 22/12/1995 09:37:30 3315712
  16. SUNKET93.DBF 30/11/1993 08:01:52 138157

…\Content\Geochemistry Data\MAPINFO\*.* (old project MapInfo files)

Filename Date Time Size(bytes) Description

  1. COAST.XLS 04/05/1998 15:56:02 2460672
  2. COAST1.DAT 08/05/1998 16:52:48 211
  3. COAST1.ID 08/05/1998 17:05:02 116
  4. COAST1.MAP 08/05/1998 17:05:02 110080
  5. COAST1.MIF 08/05/1998 08:03:34 210606
  6. COAST1.TAB 08/05/1998 17:05:02 135
  7. FRAME2.DAT 08/05/1998 09:11:34 1246
  8. FRAME2.ID 08/05/1998 09:11:34 112
  9. FRAME2.MAP 08/05/1998 09:11:34 25088
  10. FRAME2.TAB 08/05/1998 09:11:34 163
  11. LAKES.DAT 08/05/1998 14:28:00 386
  12. LAKES.ID 08/05/1998 14:28:00 40
  13. LAKES.MAP 08/05/1998 14:28:00 5120
  14. LAKES.TAB 08/05/1998 14:28:00 294
  15. SUM98.ID 04/05/1998 14:43:10 88740
  16. SUM98.MAP 04/05/1998 14:43:10 502272
  17. SUM98.MID 04/05/1998 22:28:32 2307157
  18. SUM98.MIF 04/05/1998 22:28:32 1140188
  19. SUM98.TAB 04/05/1998 14:42:10 588
  20. SUM98.XLS 04/05/1998 14:41:08 5059584

…\content\extras\minocc\*.* (Mineral occurrence data for S Sumatra)

Filename Date Time Size(bytes) Description

  1. BATMINS.DBF 04/08/1994 18:33:32 2628
  2. BATMINS.DBT 04/08/1994 18:33:32 10501
  3. BENMINS.DBF 09/08/1994 19:33:12 1684 4
  4. BENMINS.DBT 09/08/1994 19:33:14 13568
  5. BUNGMINS.DBF 16/02/1994 10:29:56 1802
  6. BUNGMINS.DBT 16/02/1994 10:29:56 7451
  7. KOTAGMIN.DBF 04/08/1994 20:39:28 2982
  8. KOTAGMIN.DBT 04/08/1994 21:25:38 17022
  9. MANMINS.DBF 06/01/1994 11:43:00 2628
  10. MANMINS.DBT 06/01/1994 11:43:00 11264
  11. PADMINS.DBF 06/01/1994 11:39:30 1448
  12. PADMINS.DBT 06/01/1994 11:39:30 15872
  13. PADMINS.TXT 09/08/1994 20:09:38 982
  14. PAIMIN1.DBF 19/08/1993 12:12:16 2746
  15. PAIMIN1.DBT 02/01/1980 23:33:54 64384
  16. PAIMIN2.DBF 19/08/1993 12:24:32 1802
  17. PAIMIN2.DBT 03/01/1980 01:48:52 64168
  18. PAIMIN2.TXT 09/08/1994 20:24:32 1309
  19. PAIMIN3.DBF 19/08/1993 12:30:42 1094
  20. PAIMIN3.DBT 14/03/1980 04:16:28 6740
  21. PAIMIN3.TXT 09/08/1994 20:25:04 655
  22. PAIMINS.TXT 09/08/1994 20:22:32 2181
  23. READ.ME 21/09/2007 14:08:18 5671
  24. RENMINS.DBF 01/08/1994 14:17:02 2982
  25. RENMINS.DBT 01/08/1994 14:17:02 12014
  26. SAROLMIN.DBF 06/01/1994 13:11:04 6640
  27. SAROLMIN.DBT 06/01/1994 13:11:04 30249
  28. SOLMINS.DBF 06/01/1994 11:41:02 2156
  29. SOLMINS.DBT 06/01/1994 11:41:02 11776
  30. SOLMINS.TXT 09/08/1994 20:20:08 1636
  31. SPENMINS.DBF 27/09/1993 13:38:06 1684
  32. SPENMINS.DBT 27/09/1993 13:38:06 11462
  33. SPENMINS.TXT 09/08/1994 20:21:16 1200
  34. TEMPFILE.TXT 01/09/1994 21:07:32 3840
  35. TKMENMIN.DBF 11/08/1994 15:36:46 3808
  36. TKMENMIN.DBT 11/08/1994 15:36:46 27459

…\content\extras\misc\*.* (Miscellaneous project files)

Filename Date Time Size(bytes) Description 5

  1. DEMOCD_updated.PPT 30/07/2007 18:11:42 82432
  2. NSUMQUAD.BMP 25/01/1999 14:50:54 644030
  3. SSUMQUAD.BMP 25/01/1999 14:37:48 883254

…\Content\Extras\REPORTS\*.* (List of reports produced by project)

Filename Date Time Size(bytes) Description

  1. PROJREPS.DOC 09/06/1995 07:51:00 58368
  2. PROJREPS.PDF 31/01/1999 16:39:52 49207

…\Content\Extras\REPORTS\GEOCHEM\ (surviving digital files from S Sumatra quadrangle Geochemistry reports)

…\Content\Extras\REPORTS\GEOCHEM\LAHAT\

…\Content\Extras\REPORTS\GEOCHEM\MANNA\

…\Content\Extras\REPORTS\GEOCHEM\MBUNGO\

…\Content\Extras\REPORTS\GEOCHEM\PADANG\

…\Content\Extras\REPORTS\GEOCHEM\PAINAN\

…\Content\Extras\REPORTS\GEOCHEM\PALEMBAN\

…\Content\Extras\REPORTS\GEOCHEM\SAROLANG\

…\Content\Extras\REPORTS\GEOCHEM\SPENUH\

…\Content\Extras\REPORTS\MINOCCS\ (Simplified Geology and Mineral Occurrence reports for S Sumatra Quadrangles)

…\Content\Extras\REPORTS\SEMINAR\ (Papers from the end of project seminar)

Surviving digital files from the SSGMEP report series

…\Content\Extras\REPORTS\SSGMEP01\

…\Content\Extras\REPORTS\SSGMEP02\

…\Content\Extras\REPORTS\SSGMEP03\

…\Content\Extras\REPORTS\SSGMEP04\

…\Content\Extras\REPORTS\SSGMEP05\ 6

…\Content\Extras\REPORTS\SSGMEP07\

…\Content\Extras\REPORTS\SSGMEP08\

…\Content\Extras\REPORTS\SSGMEP09\

…\Content\Extras\REPORTS\SSGMEP10\

…\Content\Extras\REPORTS\SSGMEP11\

…\Content\Extras\REPORTS\SSGMEP12\

…\Content\Extras\REPORTS\SSGMEP13\

…\Content\Extras\REPORTS\SSGMEP14\

Purchase information

You may also be interested in:

International geochemistry CD-ROM series

Regional geochemical data from a range of overseas countries are available on a series of CD-ROMS.

Show more
P514969

Applied geochemistry

Since the 1960s, the BGS has amassed considerable geochemical data holdings and developed significant expertise in applied geochemistry.

Show more

Was this page helpful?

  • How can we make this section better?*

  • Please select a reason*

  • How can we make this section better?*