Abstract

Deep seismic reflection surveys in North Queensland collected in 2006 and 2007 discovered a previously unknown sedimentary basin, named the Millungera Basin, which is completely covered by a thin succession of the Jurassic-Cretaceous Eromanga-Carpentaria Basin. Interpretation of regional aeromagnetic data suggests that the basin could have horizontal dimensions of up to 280 km by 95 km. Apart from regional geophysical data, virtually no geological information exists on the basin. To complement the seismic data, new magnetotelluric data have been acquired on several lines across the basin An angular unconformity between the Eromanga and Millungera Basins indicates that part of the Millungera Basin was eroded prior to deposition of the Eromanga-Carpentaria Basin. Both the western and eastern margins of the Millungera Basin are truncated by thrust faults, with well-developed hangingwall anticlines occurring above the thrusts at the eastern margin. The basin thickens slightly to the east, to a maximum depth of ~3200 m. Interpretation of gravity profiles suggests that the basin deepens to the south, possibly reaching a maximum thickness of 4000 m. Using sequence stratigraphic principles, three sedimentary packages, subdivided into five discrete sequences, have been mapped in the main seismic section. The geometry of internal stratigraphic sequences and post-depositional thrust margins indicate that the original succession was much thicker than preserved today. Presented at the Australian Petroleum Production and Exploration Association (APPEA) conference 2011.
Google map showing geographic bounding box with values North bound -17.25 East bound 145.0 West bound 138.0 South bound -26.0
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Product Type/Sub Type

dataset - External Publication

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2011

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

External Publication
structural geology
seismic sections
petroleum exploration
architecture
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-17.25
East bound
145.0
West bound
138.0
South bound
-26.0

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-f908-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2010-08-18

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays