Processed seismic data of Cruise BGR89 MESOC 1989

In the time from 13th August to 13th September, 1989 a geophysical survey was carried out with S.V. PROSPEKTA in the Southeastern Newfoundland Basin and in the Sohm Abyssal Plain. Sixteen multichannel seismic lines with a total length of 3,568 km were surveyed. The general aim of the survey was to study the structure of the oceanic crust formed during the period from 150 to 80 m.y.B.P.. The results we found that the magmatic-volcanic activity at the Mesozoic Atlantic spreading center was episodic, and there was some form of magmatic-tectonic cycling in the Mid-Atlantic Ridge processes. Drastic changes of the oceanic crustal structure have been observed, and a volcanic basement unit characterized by an internally divergent pattern of reflection horizons having an eastward dip was found coinciding with magnetic anomalies M-4 to M-0. This body consists probably of basaltic flows and volcanic clastic rocks extruded near or above sea level, and it appears that this unit is continuous from the Eastern Newfoundland Basin to the New England Seamount Chain. A doubling of the oceanic crustal thickness occurs around M-10 and is present in the area of the young end of the series of magnetic M-anomalies. Doubling of the thickness of the oceanic crust is also present in the conjugate eastern central North Atlantic segment in the area of magnetic anomalies M-10 to about M-0.

Citation proposal
. Processed seismic data of Cruise BGR89 MESOC 1989. https://gdk.gdi-de.org/geonetwork/srv/api/records/8f1b8ee3-ab66-4f01-9199-1aeff1136320

INSPIRE
SDS

INSPIRE

Identification

File identifier: 8f1b8ee3-ab66-4f01-9199-1aeff1136320 XML

Hierarchy level: Dataset

Online resource

Resource identifier

code: 55787628-d2ba-dc1e-6cbf-24e814688b2c

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 )

Northwest Atlantic Ocean
Newfoundland Basin
Sohm Abyssal Plain
Nordwest-Atlantik
Neufundland-Becken
Sohm-Tiefsee-Ebene

Geographic coverage

Temporal reference

Temporal extent

Date ( Creation ): 1989-09-13

Quality and validity

Lineage: During the period from 13th August 1989 to 13th September 1989 BGR acquired seismic lines in the Northwest Atlantic Ocean off Newfoundland. The line BGR89-01 consists of stacked data. The lines BGR89-02 to BGR89-16 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: BGR89 MESOC 1989, (c) BGR, Hannover, 2018