Citation

Symonds, P.A. & Colwell, J.B., 1993. Geological Framework of the Southern Lord Howe Rise/West Norfolk Ridge Region: Cruise Proposal. Record  1992/097. Australian Geological Survey Organisation, Canberra.

Abstract

The Lord Howe Rise region is an enormous area of complex seabed lying 500-1500 km east of Australia. It includes relatively shallow water features such as the Lord Howe Rise, and the Norfolk, West Norfolk and Dampier Ridges, and intervening deeper water areas such as the LordHowe, Middleton and New Caledonia Basins. Based upon the UN Law of the Sea Convention, Australia has a large seabed claim in this region because of Lord Howe, Norfolk and PhilipIslands, which are Australian territory and would all generate 200 nautical mile Exclusive Economic Zones and related 'legal' Continental Shelf areas. There is a negotiated seabed boundaryin the north separating French and Australian territory, but as yet there is no negotiated seabed boundary separating New Zealand and Australian territory in the south. Owing to its vast size, many features within the Lord Howe Rise region remain sparsely covered by seismic data. Analysis of available data has defined several areas that may have long-termpetroleum potential. The most significant of these are the rift system beneath the western Lord Howe Rise, the New Caledonia basin and the Taranui Sea Valley area of the southern NorfolkRidge. The Australian Geological Survey Organisation (AGSO - formerly the Bureau of MineralResources, BMR) Project 121.30 (Lord Howe Rise and Norfolk Ridge 'Law of Sea' Study) seeks to improve our understanding of the geological framework of the southern part of the Lord HoweRise region in the vicinity of the Australia/New Zealand seabed boundary zone. Its major objectives are: 1) To investigate the structure, stratigraphy and basin development of the southern Lord Howe Rise, southern New Caledonia Basin, and West Norfolk Ridge in the Australia/New Zealandseabed boundary zone. 2) To assess the resource potential of the major structural features within the region. 3) To determine the tectonic framework, crustal characteristics and evolution of the region, andattempt to understand the processes that have produced narrow strips of thinned and extended continental lithosphere ("ribbon continents"), separated by narrow ocean basins. 4) To acquire data to assist with the definition of Australia's 'legal' Continental Shelf on thesouthwestern margin of Lord Howe Rise. To address these objectives it is proposed that RV Rig Seismic be used to acquire approximately 3250 km of multichannel seismic and associated geophysical data, and conduct dredging operations, during a cruise in the southern Lord Howe Rise/West Norfolk Ridge region (Survey114). The seismic data will be recorded on eight lines (including four very long regional lines) using a 3000 m streamer (120 x 25 m groups), 49 litre sleeve gun arrays, 16 second records, and 30-fold coverage.
Google map showing geographic bounding box with values North bound East bound West bound South bound
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Product Type/Sub Type

nonGeographicDataset - GA Publication - Record

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1993

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

Keywords

GA Publication
Record
geology
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Lineage

Legacy product, lineage not available

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

a05f7892-74ba-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

1996-10-30

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

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