Authors / CoAuthors
Blewett, R.S.
Abstract
Integrating the geology and geophysics of the Pilbara granite-greenstone terrane (GGT) contributes greatly to the understanding of its tectonic and geological evolution. The Pilbara GGT is an ovoid entity some 600 km by 550 km that was extensively reworked along its margins. The Pilbara GGT is characterised by an ovoid geometry of granitoids and encircling greenstones (dome and basin) that extends across the entire Pilbara GGT. The Pilbara GGT is a unique GGT in that it is very deep (~14 km preserved today), and it appears to continue this ovoid geometry to the base of the mid crust. Mapping deep banded iron-formation in the magnetic data provide an understanding of the timing constraints on the development of the dome and basin geometry (mostly after 3.2 Ga), and also shows that a number of the so-called domain boundaries are not significant faults. The gravity structure of large domal greenstone belts does not support the idea of significant volumes of underlying granitoid. These data also illustrate the relatively thin nature of the < 3.0 Ga successor basins (< 5 km), as well as constraints on their 4D geometry and under cover extension.
Product Type
nonGeographicDataset
eCat Id
37062
Contact for the resource
Custodian
Owner
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
-
- External PublicationConference Paper
- ( Theme )
-
- geology
- ( Theme )
-
- geophysics
-
- AU-WA
- Australian and New Zealand Standard Research Classification (ANZSRC)
-
- Earth Sciences
-
- Published_Internal
Publication Date
2001-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
unknown
Topic Category
geoscientificInformation
Series Information
Lineage
Unknown
Parent Information
Extents
[-22.0, -20.0, 116.0, 121.0]
Reference System
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
Source data not available.