pembentuk cekungan (tektonik)

4. Pembentukan CekunganMatakuliah Pilihan Semester VII

Oleh: Bernadeta Subandini Astuti, ST, M.Eng

Density : semakin kearahatas semakin rendah

Terkait dengan pengapungan

Konsep : Airy Isostacy

Densitas : 2,8

Densitas : 3,3

Materi lalu Materi lalu

Flextural Isostacy Hypothesis

Konsep : Airy Isostacy

Dihubungkan denganrigid

: Adanya flexturalresponse (responkelenturan) menunjukkantingkat kaku yang rendah

McKenzies ModelFor Basin Formation

Materi lalu

Bisa juga dilihat di Global Tectonic - Kearey et al, 2009

Materi lalu

PANGAEA : A SUPER CONTINENT

Dasar pemikiran: Tektonik

Evidence :

The Continental

Jigsaw Puzzle

Evidence :

Fossils Match Across the Seas

Evidence :

Rocks Types and

Structures Match

Evidence :

Ancient Climate

Dasar pemikiran

HOT

SPOT

PLATE BOUNDARY : MIDOCEANIC RIDGES

IGNEOUS ACTIVITY AND SEDIMENTATION ASSOCIATED

WITH CONTINENTAL RIFTING

(Dewey and Burke, 1974)

Divergent Plate Boundaries and Oceanic Ridges

SEVEN MAJOR LITHOSPHERIC PLATES

HOT

SPOT

TECTONIC BASIN

CLASSIFICATION

FOR CONTINENTAL ( a, b, and c ),

MARGINAL AND OCEANIC BASINS

( d, e, and f )

After Dickinson and Yarborough, 1976;

Kingston et al , 1983; Mitchell and Reading, 1986

A Tectonic Basin Classification

TECTONIC BASIN

CLASSIFICATIONFOR SUBDUCTION and

COLLISION-RELATED

BASINS (REMNANT BASIN)



B

TECTONIC BASIN

CLASSIFICATION

for

COLLISION-RELATED and

STRIKE-SLIPSINS/WRENCH

BASINS



C

A. Divergent boundaries

B. Convergent boundaries

C. Transform boundaries

Plate Boundaries

Type of plate interaction(Indonesia)

HALL & WILSON

JOURN .OF ASIAN E SCI.2000

STTNAS YOGYAKARTA PERTAMINA DIT.HULU

Plate Movement

Tectonic setting of Southeast Asia and SundaMicroplate (Sunda Land)

Peta Cekungan Sedimentasi Indonesia

51

2

4

6

7

8

9

12

13

11

10

14

15

1618

17

19

23

24

21

22

20

2526 27

28

29

30

32

33

3436

35

37

38

39

40

41

42

43

44

45

46

47

48

49

50

58

51

52

53

55

54

56

57

59

60

61

62

63

64

65

66

31

3

M A

L A

Y S

I A

S U

M A

T R

A K A L I M A N T A N

S A R

A W A

K

S A B A HBRUNEI

M a

k a

s s

a r

S

t r

a i

t

K a r i m

a t a S t r a i t

M a l a c c a S

t r a i t

S o u t h C h i n a S e a

N a t u n a S e a

J a v a S e a

J A V A

I R I A N J A YA

SULAWESI

Simeule

Nias

Enggano

Bangka

Bel itung

Natuna

Madura

Bali Lombok

Sumbawa

Flores

Sumba

Buton

S a w u S e a

B a l i S e a F l o r e s S e a

Timor

Alor

Wetar

Tan

imba

r

T i m o r S e a

Kai

Seram

Buru

Talibu

Obi

Misool

Mangole

Banggai

HALMAHERA

Waigeo

Bacan

Morotai

S e r a m S e a

M a l u k u S e a

B a n d a S e a

H a l m a h e r a S e a

S u l a w e s i S e a

P A C I F I CO C E A N

Cendrawasih Bay

Yapen

Biak

Wakem

Kob roor

Trangan

Yos Sudarso

A r a f u r a S e a

AUSTRALIA

THAILA

ND

I N D I A N O C E A N

Anambas

Pagai

Sipura

Siberut

Tana Batu

04 S

THAILAND

INDONESIA

INDO

NESIA

MALAY

SIA

PHILIPPINES

INDONESIA

AUSTRALIA

INDONESIA

TH

AIL

AN

DM

ALA

YS

IA

MA

LA

YS

IAIN

DO

NE

SIA

PA

PU

A N

EW

GU

INE

A

IND

ON

ES

IA

96 E 100 E 104 E 108 E 112 E 116 E 120 E 124 E 128 E 132 E 136 E 140 E

SINGAPORE

Bintan

Singkep

Batam

08 S

00

04 N

08 N

12 S

16 S

PAPUA NEWGUNEA

PHILIPPINES

THAILAND

CAMBODIA

VIETNAM

Bandung

Jakarta

Lampung

Semarang

Yog y akar ta

Surabay a

Denpasar Mat aram

Dili

Kupang

Ujungpandang

144 E

Palembang

Bengkulu

Jambi

Padang

Pekanbaru

KualalumpurMed an

Banda Aceh

Pontianak

Banjarmasin

Brunei Darusalam

Kucing

Palangkaray a

Samarinda

Palu

Kendari

Man ado

Ambon

Jayapura

Man ila

Pnom Pene

Ho Chiminth

Bangkok

Mindanao

PalawanNegros

Samar

Panay

Mindoro

AUSTRALIA0 500

KILOMETERS

12 N

Pasuruhan

Sandakan

Plaju

Lhokseumawe

Cirebon

Laut

Mahakam

Total

Sakakemang

Block

Toba Lake

INDONESIA BASINSINTRACRATONIC

PASSIVE MARGIN

ABORTED RIFT

PULL-APART

TRANSFORM MARGIN

OCEANIC TRENCH*

FOREARC

INTRA-ARC

BACK-ARC

SUSPENDED

ISLAND ARC

OCEANIC AND

REMNANT OCEANIC

FORELAND

THRUST FOLD BELT

SUTURE

FOREDEEP

PLATFORM

1 NORTH SUMATRA2 CENTRAL SUMATRA3 OMBILIN4 SOUTH SUMATRA5 MEULABOH6 NIAS7 MENTAWAI8 SUNDA STRAIT9 SOUTH WEST JAVA10 SOUTH JAVA11 SOUTH BALI-LOMBOK12 SOUTH CENTRAL JAVA13 SOUTH EAST JAVA14 SUNDA15 ASRI16 VERA17 BILLITON

18 NORTH WEST JAVA19 NORTH EAST JAVA20 FLORES21 WEST NATUNA22 EAST NATUNA23 MELAWI24 KETUNGAU25 PEMBUANG26 BARITO27 ASEM ASEM & PASIR28 PATERNOSTER29 UPPER KUTEI30 KUTEI31 MUARA32 NORTH EAST KALIMANTAN33 CELEBES34 NORTH MAKASSAR

35 SOUTH MAKASSAR36 LARIANG37 SPERMONDE38 SALAYAR39 SENGKANG40 BONE41 GORONTALO42 SOUTH MINAHASA43 NORTH MINAHASA44 BANGGAI-SULA45 SALABANGKA46 MANUI47 BUTON48 BANDA49 SAVU50 TIMOR51 TANIMBAR-KAIS

52 WEBER53 SERAM (BULA)54 NE HALMAHERA (KAU BAY)55 EAST HALMAHERA (BULI BAY)56 SE HALMHERA (WEDA BAY)57 ARAFURA58 ARU59 AKIMEUGAH60 CENTRAL IRIAN JAYA61 LENGGURU62 BINTUNI63 TELUK BERAU-AJUMARU64 MISOOL-ONIN65 SALAWATI66 WAIPOGA-WAROPEN

LIST OF BASINSTYPES OF BASINS

This distribution of basin in Indonesia is not an official document. This map has been prepared and modified

from the previous PERTAMINA/BEICEP 1982 and 1985 non exclusive studies.

TYPE OF CRUST ON WHICH THEBASIN REST

TECTONIC POSITION TOPLATE MARGIN

TYPE OF PLATE INTERACTION

PLATE MARGIN/

INTRAPLATE

- CONVERGENT

- DIVERGENT

- STRIKE SLIP

BASIN CHARACTERISTICS,

SIZE, CONFIGURATION,

SEDIMENTATION AND

STRUCTURATION

CONTINENTAL

MARGIN BASIN

TYPE

CONVERGENT

BASIN TYPE

After Kingston et al, 1983a

Basin Types and crustal Association

Basin Classification

Dasar pemikiran

HOT

SPOT

http://www.google.com/imgres?es_sm=93&espv=210&biw=1024&bih=494&tbm=is

ch&tbnid=XFUQfOS1U0n61M:&imgrefurl=http://hudsonvalleygeologist.blogspot.co

m/2011/03/nyiragongo.html&docid=QxR4Fi7F-

eztKM&imgurl=https://lh4.googleusercontent.com/-uIBQf7VMnAU/TXj6HZp6-

FI/AAAAAAAABJM/a7DPJe8lqUc/s1600/rv.gif&w=440&h=307&ei=b_h9Ur68Lc

KjrQe_x4DIBw&zoom=1&ved=1t:3588,r:16,s:0,i:127&iact=rc&page=2&tbnh=177

&tbnw=269&start=9&ndsp=12&tx=91&ty=86

Divergent boundary at continental

plates (rift Valey)

East African rift valley

And associated features

RELATION BETWEEN

SAGS,RIFTS, AULACOGENS and PASSIVE MARGINS

RELATION BETWEEN

SAGS,RIFTS, AULACOGENS and PASSIVE MARGINS

EVOLUTION MODEL : AULACOGEN and RELATED OROGENIC BELT

http://csmres.jmu.edu/geollab/vage

ol/vahist/Rift3.html

PLATES BOUNDARY : SUBDUCTION ZONE

A. Oceanic-continental

B. Oceanic-oceanic

C. Continental-continental

Three types of convergent Plate

Boundaries :

Tipe seting cekungan foreland (Willett et al., 1993 dalam Allen & Allen, 2005).

Skema penampang yang memperlihatkan tumbukan mikro-kontinen Banggai-Sula dengan Sundaland, Simandjuntak & Barber, 1996 dalam Satyana, 2008

MODEL OF

PULL-APART BASIN

DEVELOPMENT(After Mann et al.,1983, p.531)

A

CONTINUUM MODEL OF

PULL-APART BASIN

DEVELOPMENT(After Mann et al.,1983, p.531)

B

AFig.9 B

B


Fig 9. Transcurrent, or strike-slip or wrench faults are used more or less synonymously

Transform boundaries

Fig. 10. Tectonic element system in Central Java


Deep

High

Low

pembentuk cekungan (tektonik)

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