• Product catalogue
  •  
  •  
  •  

Crustal reactions resulting from the mid-Pliocene to Recent continent-island arc collision in the Timor region

The Sunda and Banda Arcs are contiguous surface features associated with the convergent boundary between the Southeast Asian and Australian-Indian Ocean plates, and where these two arcs meet, the tectonic environment changes from oceanic subduction to continent-island arc collision. This area has been investigated in an attempt to recognise and understand some of the effects of the introduction of continental crust into a subduction zone. Depositional environments encountered in Deep Sea Drilling Project (DSDP) hole 262 have been correlated with present environments to determine past horizontal distances between the leading edge of the subduction zone and the DSDP location on the Australian crustal margin. These data have been combined with the apparent plate motion at this margin to derive an estimate of the surface width of the subduction zone through time. The similarity between past width variations and present lateral variations has been used as the basis for proposing a collision model. Before the collision, the Indonesian subduction zone extended eastwards into the region that is now the southern Banda Arc. The continental edge of Australia first entered this subduction zone about 3 m.y. ago, in the mid-Pliocene. Initially, a wedge of deformed continental margin sediments began to develop at the leading edge of the subduction zone. The tectonic front that separated deformed from undeformed sediments and an associated bathymetric low migrated up the continental slope leaving in their wake a large wedge of deformed continental margin sediments, which produced a southerly bulge in the subduction zone. Ultimately, the deformation wedge began to absorb the near-surface stresses, and relative motion between the front and the southern plate slowed to near zero. Continuing relative plate motion carried the deformation front back towards the volcanic arc. Compression from this has been almost entirely taken up in the subduction zone, and has led to thickening and uplift of the deformation wedge and crust associated with the pre-collision outer-arc ridge. The proposed collision model explains many of the morphological, geological, and geophysical irregularities in the Timor region. On a broader regional scale, the evidence that the Southeast Asian plate at Timor is moving eastward at about 60 km / m.y. relative to the Eurasian plate, supports the interpretation that the India/China continental collision is pushing the Southeast Asian plate to the southeast.

Simple

Identification info

Date (Publication)
1981-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/81078

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Bureau of Mineral Resources, Geology and Geophysics

Canberra
Author

Johnston, C.R.

1
Author

Bowin, C.O.

2
Name

BMR Journal of Australian Geology and Geophysics

Issue identification

6:3:223-243

Point of contact
Role Organisation / Individual Name Details
Custodian

Corp

Owner

Commonwealth of Australia (Geoscience Australia)

Custodian

Commonwealth of Australia (Geoscience Australia)

Voice
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
Unknown

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

Keywords
  • GA Publication

  • Journal

Keywords
  • INA

  • TLS

Australian and New Zealand Standard Research Classification (ANZSRC)
  • Earth Sciences

Keywords
  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice
OnLine resource

Journal article (pdf)

Journal article (pdf)

Distribution format
  • pdf

Resource lineage

Statement

Unknown

Hierarchy level
Non geographic dataset
Other

GA Publication

Description

Source data not available.

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/fae9173a-7013-71e4-e044-00144fdd4fa6

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice

Type of resource

Resource scope
Document
Name

AGSO BMR Journal

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/81078

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/fae9173a-7013-71e4-e044-00144fdd4fa6

Date info (Revision)
2018-04-20T06:08:30
Date info (Creation)
2014-06-03T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W



Provided by

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •