Processed seismic data of Cruise SO36 1985

On the first leg of SONNE cruise SO-36 in the period from 11th February to 12th March 1985, geophysical investigations have been carried out on the Lord Howe Rise off eastern Australia by the Federal Institute for Geosciences and Natural Resources (BGR) in co-operation with the Bureau of Mineral Resources, Geology and Geophysics, Canberra. A total of 3,660 km of digital seismic reflection profiles, 6,740 km of gravity, magnetics, multibeam echosounder and sub-bottom profiler profiles, as well as 8 sonobuoy refraction profiles were recorded during this survey. A geomagnetic monitoring station of the BGR was operated during a part of the cruise on Lord Howe Island under the supervision of the BMR. These measurements provided a detailed picture of the structures of the survey area of the Lord Howe Rise. The samples proved that the Lord Howe Rise and the Dampier Ridge west of it consist of continental crust. Indications for structures rich in hydrocarbons were not observed. The 2nd and 3rd leg of SONNE cruise SO-36 were designed to investigate the structure, geological development and hydrocarbon potential of two frontier areas, the western and southwestern continental margin of Tasmania and the South Tasman Rise. On the 2nd leg (12.03.-12.04.1985) multichannel seismic reflection measurements were carried out in parallel with magnetic, gravimetric, sea-beam and 3.5 kHz subbottom profiler measurements on 19 lines with a total length of 3,820 km. In addition, 2,140 km were surveyed with magnetics, gravity meter, sea-beam and 3.5 kHz subbottom profiler in transit from and to Sydney, respectively. On the 3rd leg, which started in Sydney on 12th April 1985 and ended in Suva/Fiji one month later, 63 stations were sampled by dredging and coring with the aim (a) to provide lithology and biostratigraphic information about the seismic sequences mapped during leg 2, and (b) to obtain geochemical evidence of hydrocarbon generation from the character of gases absorbed onto the surficial sediment. Samples came from 33 stations off Western Tasmania, from 23 stations on the South Tasman Rise, and from 7 stations in the region of the Lord Howe Rise and the Dampier Ridge. In transit to the sampling sites, 11 single channel seismic lines with a total length of 470 km were surveyed, and in addition, 4,230 km were surveyed with magnetics, gravity meter, sea-beam, and subbottom profiler. Seven regional seismic unconformities were recognized and sampled, and the structural style of both areas was established. Thermogenic hydrocarbons in substantial concentration were found in the surface sediments at the western Tasmanian slope.

Citation proposal
. Processed seismic data of Cruise SO36 1985. https://gdk.gdi-de.org/geonetwork/srv/api/records/b32c8732-cbdd-440a-95ff-1e819eb2bccb

INSPIRE
SDS

INSPIRE

Identification

File identifier: b32c8732-cbdd-440a-95ff-1e819eb2bccb XML

Hierarchy level: Dataset

Online resource

Resource identifier

code: 46273886-0bc6-ecc8-9bfa-c3f4c82bce91

Metadata language: English

Spatial representation type: Vector

Encoding

Format: Shapefile

Version: n/a

Projection

Classification of data and services

Topic category

Geoscientific information

Classification of data and services

Coupled resource

Classification of data and services

Coupled resource

Keywords

GEMET - INSPIRE themes, version 1.0 ( Theme )

Geologie
geology

GEMET - Concepts, version 2.4 ( Theme )

geophysics
Geophysik
raw material
Rohstoff

Other keywords

Keywords ( Theme )

Marine geology
Meeresgeologie
Seismics
Seismik
Two-dimensional seismic reflection
zweidimensionale Reflektionsseismik

Keywords ( Place )

Lord Howe Rise
Dampier Ridge
Lord-Howe-Rücken
Dampier-Rücken
Tasmania
South Tasman Rise
Süd-Tasman-Rücken

Geographic coverage

Temporal reference

Temporal extent

Date ( Creation ): 1985-05-12

Quality and validity

Lineage: During the period from 11th February 1985 to 12th May 1985 BGR acquired seismic lines in the Tasman Sea at the Lord Howe Rise, off Western and Southern Tasmania and at the South Tasman Rise during the legs 1, 2 and 3 of cruise SO36. The lines SO36-45 and SO36-50A consist of raw data. The lines SO36-06, SO36-06A, SO36-07, SO36-08, SO36-09, SO36-10, SO36-11, SO36-12, SO36-13, SO36-14, SO36-15, SO36-15A, SO36-16, SO36-17, SO36-17A, SO36-18, SO36-19, SO36-20, SO36-21, SO36-22, SO36-23, SO36-24, SO36-44, SO36-46, SO36-47, SO36-48, SO36-49, SO36-50, SO36-51, SO36-52, SO36-53, SO36-54, SO36-55, SO36-56, SO36-57, SO36-58, SO36-59, SO36-60, SO36-61 and SO36-62 are migrated data.

Conformity

Explanation: siehe dazu die angegebene Durchführungsbestimmung

Restrictions on access and use

Access constraints: Allgemeine Geschäftsbedingungen, siehe http://www.bgr.bund.de/AGB - General terms and conditions, see http://www.bgr.bund.de/AGB_en. Die bereitgestellten Informationen sind bei Weiterverwendung wie folgt zu zitieren: Datenquelle: SO36 1985, (c) BGR, Hannover, 2019