Processed seismic data of Cruise ANT-IV/3 1986

On the F.S. POLARSTERN cruise ANT-IV/3 (6th December, 1985 - 13th March, 1986) multichannel seismic measurements were carried out in parallel with magnetic and gravimetric measurements on 33 lines with a total length of 6,263 km. 3,350 km of the multichannel seismic lines have been processed aboard. The geophysical studies were designed to investigate the structure and geological development of the Weddell Sea continental margin from meridians zero to 60°W, and to define suitable and safe drilling locations for Leg 113 of the Ocean Drilling Program. The main results of the geophysical studies are: (1) The discovery of an approximately N50°E trending failed drift basin, following the trend of a negative magnetic anomaly and a positive gravity anomaly. (2) The discovery of two extensive wedge-shaped and symmetric basement units around a failed drift basin between longitudes 40°W and 20°W. The seismic characteristics, i.e. seismic velocities of 4 km/s and an internally divergent pattern of reflectors suggest that both wedges are formed from extrusive/intrusive volcanic rocks. (3) The confirmation of a major plate tectonic boundary trending approximately N80°E to N60°E, i.e. the EXPLORA-ANDENES escarpment. (4) The confirmation of a glaciogenic progradational wedge beneath the shelf of the Weddell Sea Embayment, made up of several thousand metres of sediments. (5) The definition of 13 suitable and safe drilling locations for ODP-Leg 113.

Citation proposal
. Processed seismic data of Cruise ANT-IV/3 1986. https://gdk.gdi-de.org/geonetwork/srv/api/records/ea39c67d-1539-4ace-8669-e294c71ae54f

Simple

Alternate title: ANT-IV/3 1986

Date ( Creation ): 1986-03-13

Identifier: 1692894b-6270-2a57-cccb-13a301e91531

Status: completed Completed

Point of contact

Federal Institute for Geosciences and Natural Resources

Stilleweg 2 Hannover 30655

GEMET - INSPIRE themes, version 1.0 ( Theme )

Geologie
geology

GEMET - Concepts, version 2.4 ( Theme )

geophysics
Geophysik
raw material
Rohstoff

Keywords ( Theme )

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

Keywords ( Place )

Weddell Sea
Weddell-Meer

Access constraints: Other restrictions

Use constraints: Other restrictions

Other 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: ANT-IV/3 1986, (c) BGR, Hannover, 2019

Spatial representation type: Vector

Metadata language: English

Character set: UTF8

Topic category

Geoscientific information

Distribution format

Shapefile (n/a )

Transfer size: 2

OnLine resource: ANT-IV/3 1986 (Shapefile)
ANT-IV/3 1986 im Format ESRI Shape

OnLine resource: Profile ANT4-01
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Profile ANT4-31

OnLine resource: Profile ANT4-32
Profile ANT4-32

OnLine resource: Profile ANT4-33
Profile ANT4-33

OnLine resource: Karte im BGR-Geoviewer
Karte im BGR-Geoviewer

Hierarchy level: Dataset

Conformance result

Date ( Publication ): 2010-12-08

Explanation: siehe dazu die angegebene Durchführungsbestimmung

Statement: During the period from 6th December 1985 to 13th March 1986 BGR acquired seismic lines in the Weddell Sea. The lines ANT4-11A, ANT4-20 and ANT4-24 consist of raw data. The lines ANT4-10, ANT4-11, ANT4-16, ANT4-23, ANT4-26 and ANT4-30 are stacked data. The lines ANT4-01, ANT4-02, ANT4-03, ANT4-04, ANT4-05, ANT4-06, ANT4-07, ANT4-08, ANT4-09, ANT4-12, ANT4-13, ANT4-14, ANT4-15, ANT4-17, ANT4-18, ANT4-19, ANT4-21, ANT4-22, ANT4-25, ANT4-27, ANT4-28, ANT4-29, ANT4-31, ANT4-32 and ANT4-33 are migrated data.