Page 11 - Sumatra Geology, Resources and Tectonic Evolution

I I I , , , , __ , , , , , ,
96°E 97 ° 98 o 9~1 o 100 ° ) 101 o 102 ° ~ 103 ° 104 ° 105 ° 106 ° 107 ° 108 °
ANDAMAN SEA SIMPLIFIED GEOLOGICAL MAP OF SUMATRA
pA ACEH
Lhokseumawe
SEDIMENTS INTRUSIVES 5 o -
PENINSULAR Holocene - I vo,o .,c l Pliocene-
/
Pleistocene I
Eocene
Pliocene -
MALAYSIA / Eocene 1 1
Meulaboh l Late
Cretaceous 4 ° _
Lower Cretaceous - Woyla Group l Mid - Jurassic
Upper Jurassic Rawas, Peneta,Asai
l Late Triassic -
Triassic ~ Kualu Early Jurassic
Tuhur 3 °_
l Permian
MEDIAL SUMATRA l schist and gneiss
Sin TECTONIC ZONE
o o% ang WEST SUMATRA BLOCK EAST SUMATRA BLOCK

Banyak Islands 2 ° -
Lower Permian l Palepat, Silungkang
Mengkarang
gkalis Lower Permian - ~ Kluet Lower Permian - ~ Bohorok
inas ' Lower Carboniferous ~ Kuantan ?Upper Devonian ~ Mentulu
Nias ~ ~Tr-Jg ~- 4Tr'Jg 1 o_

Natal Islands
roPE
r"~ {kngga TIN ISLANDS o °-
0 ° Batu ,~ Pini k Triassic- Bintan

Islands 1 r > p~r-Jg~ -~, ?Cretaceous ~ Tempilang
Singke Bentong-Belitung Accretionary Complex
Sifigk
\ ?Devonian- l
1oS ~.~--~....~, Permian Pemali Group 1 o_
PADANG
Siberut

INDIAN Tr-Jg 2 °-

OCEAN Sipora '~Bangka Belitung
Pag
(Billiton)
_

.3 ° ,dip SOUTHEAST 3°..
. ASIA ~llJTr.~gB ukit Batu
¢..~sEA.c. Toboali
l,...-~ ,, ~ cRouP ConocoPhdhps

BENGKULU
LS
4 ° _
Modified from"
Stephenson & Aspden, 1982. Simplified Geological JAVA SEA
Map of Northern Sumatra. Scale 1:1,500,000 Institute of
Geological Sciences, Keyworth, U.K.
Gafoer et al. 1992a. Geological Map of Indonesia, Padang
Lake 5 ° .
Sheet. Scale 1:1,000,000. Geological Research and
Development Centre, Bandung, Indonesia. LAMPUNG
Gafoer et al. 1992b. Geological map of Indonesia, Palembang Enggano (:~ 0 1 O0 200km
Sheet. Scale 1.1,000,000. Geological Research and Development
Centre, Bandung, Indonesia.
o ® ~ Fit--. _ c'-- ~. s °,
96 ° 97 ° 98 ° 99 ° 100 ° 101 ° \ 102 ° 103 ° 104 105 ° , Krakatau'-" "-1 ~ 107 ° 108 °
1 I. 1. 1 t 1 _ _