Investor Presentaiton
LEMIGAS
GEOLOGY OF the NORTH SUMATERA BASIN
General Stratigraphy
Chrono-Stratigraphy
Lithostratigraphy
N Zone
Super
Cycles
M. Yrs System Series
NSO Extension
Peusangan
Western High
'B' & Pase
Malacca Shelf
Asamera Pertamina
Quarter- Pleisto-
1.65
3.50
nary
cene
L
N23
N22
N21
Julu Rayeu
N20
Seurula
N19
5.20
N18
N17
-10.20
-16.20
T
T
T
T
20
20
25.20-
30
30
36
39.4
49
49
Tertiary
Eocene
Middle
Paleogene
Late
Oligocene
Early
Late Miocene (??) Diorite
Eocene Basalt
Late
Early
Neogene
Miocene
Sligi
Middle
Late
Plio-
cene
E
Pre-Tertiary
Seurula
Keutapang
N16
L. Baong Ss
N15
N14
10.5
(96)
N13
Seumpo
Peunulin
Baong
N12
(13)
N11
N10
N9
Malaka N8
N7
TB 2
Arun
Peutu
Arun
Belumai
N6
Parapat/Bruksah
Meucampli
Bampo
Tampur
N5
z NE @@ EEEEEEEE E
100
TB 3
Global relative Change Of
Coastal Onlap
(Vail et al., 1977)
Landward
1.0
0.5
Basinward
0
(07)
(17)
(28)
TI
21
(22)
30
30
TB 1
(226)
(24)
(267
(29)
(32)
Initial deposition of
sediments began in Late
Eocene -Early Oligocene
time in very limited Area as
initial syn-rift infill
Main sedimentation in the
basin took place during
Late Oligocene to
Pleistocene
Maximum sedimentary
rocks thickness is up to
6.000 m in the deepest part
of the basin.
TA 4
(36)
(38)
39.4
TA 3
49.5
(44)
(455)View entire presentation