Processed seismic data of Cruise ANTVIII/6 1990

The POLARSTERN cruise ANTVIII/6 from 14. March to 30. April 1990 incorporated an integrated geophysical reconnaissance survey consisting of multichannel seismic measurements in parallel with gravimetric and magnetic measurements. The survey covered the plateaus Maud Rise, Astrid Ridge and Gunnerus Ridge off Queen Maud Land and the oceanic crust in their vicinity. Severe ice and weather conditions allowed seismic work only on the Gunnerus Ridge and on the oceanic crust. Together with previous BGR lines on the Astrid Ridge and the Maud Rise the new data improve considerably the understanding of the area. The main results are: 1. The oldest identified sea-floor spreading anomaly was M11 before the cruise, now it is M24. Thus spreading has begun not only 135 mill. years B.P., but at least 160 mill. years B.P. 2. The Gunnerus Ridge is strongly asymmetric. The mainly weak magnetic anomalies indicate that in contrast to the Astrid Ridge volcanism was not important during its development. 3. The magnetic anomalies are much stronger on the Astrid Ridge and west of it than east of the Astrid Ridge and on the Gunnerus Ridge. 4. The roughness of the basement surface of the oceanic crust varies in a wide range.

Citation proposal
. Processed seismic data of Cruise ANTVIII/6 1990. https://gdk.gdi-de.org/geonetwork/srv/api/records/dd441209-9466-4826-8766-7480e5f19025

INSPIRE
SDS

INSPIRE

Identification

File identifier: dd441209-9466-4826-8766-7480e5f19025 XML

Hierarchy level: Dataset

Online resource

Resource identifier

code: e85e4a67-3d77-6b22-0219-20e494bc9182

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 )

Atlantic-Indian Antarctic Basin
Antarktisches Becken
Astrid Ridge
Gunnerus Ridge
Maud Rise
Astrid-Rücken
Gunnerus-Rücken
Maud-Kuppe

Geographic coverage

Temporal reference

Temporal extent

Date ( Creation ): 1990-04-30

Quality and validity

Lineage: During the period from the 14th March 1990 to the 30th April 1990 BGR acquired seismic lines off Queen Maud Land in the Atlantic-Indian Antarctic Basin. The lines ANT8-1 to ANT8-10 consist of raw 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: ANTVIII/6 1990, (c) BGR, Hannover, 2019