Page 19 - Sumatra Geology, Resources and Tectonic Evolution

6 CHAPTER 1

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Fig. 1.5. Coverage, sheet numbers and names of the 1:250 000 Geological Maps published by the Indonesian Geological Survey, the Geological Research and
Development Centre, Indonesian Ministry of Mines and Energy.

programmes with funding from UK ODA Technical Cooporation (Version 2 in 1999). In 1995 following a one-year 'Sustainability
budget. This programme was completed in 1995 with the publi- Phase' of the SSGMEP a Geochemical Atlas of Southern
cation by GRDC of the last of the forty three Geological Map Sumatra was issued in digital form on CD-ROM (Machali et al.
Sheets at 1:250000 scale, covering the whole of Sumatra 1995). Publication in book form followed in 1997, with text in
(Fig. 1.5) and 18 1:250000 scale Bouguer gravity anomaly both Bahasa Indonesia and English (Machali et al. 1997). An
maps of southern Sumatra, including Bangka and Billiton evaluation of tectonic models for the Pre-Tertiary history of
islands, but excluding the coastal swamps and the Barisan Sumatra based on BGS/DMR/GRDC and University of London
Mountains. The collaborative geochemical survey was completed research programmes has been published by Barber & Crow
in 1994 with the publication by DMR of 14 quadrangle boxed sets (2003).With the completion of this major phase of UK
of 1:250 000 single element proportional symbol geochemical involvement in the study of the geology of the Sumatra, the
maps (up to 15 elements) with accompanying reports on the time is ripe to review the vast increase in our knowledge of
geochemistry, geology and mineral occurrences. Subsequently the geology of Sumatra since van Bemmelen's (1949, 1970)
the Sumatra geochemical data was made available on CD-ROM synthesis.