Geologic and geophysical study of the Scotia Arc: The Southern ridge of the Scotia area

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Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: Geologic and geophysical study of the Scotia Arc: The Southern ridge of the Scotia area

Description:

Abstract:

In English: The objectives of this campaign were: -Transition among different plates and sub-plates; Shetland, Drake, Scotia and Antarctic and their joint points. -Study of the link between the Bransfield spreading centre of and the South Shetlands subduction zone. -Detailed morphostructural analysis of a shear plate boundary and one of the biggest intracrest depressions (Hesp?rides Deep), by means of the multibeam probe. -Establishment of geomagnetic guidelines in the Bransfield spreading zone in the shear's plate boundaries. -Study of the formation of regional infilling and discontinuities in the basins adjacent to the ridge. -Application of the studied models in the international working plans on oceanic ridges (Interidge project). Data obtained: -More than 1500 km of multichannel seismics -3500 km of multibeam probes -3500 km of hydrographic sounding -3500 km of geomagnetic data It was recognised with 100% insoundification an intracrest depression of the South Scotia Ridge, it was called Hesperides Deep in honours of the RV Hesperides in its first Antarctic campaign. -Study of the Bransfield Strait, a semi-graben with recent activity and neovolcanic crests indicative of an initial process of sea-floor spreading. -The South Scotia ridge was recognised, being established its morphoestructure. -Establishment of the seismotectonic character of the Scotia Plate and the Powell Basin. -It was showed the origin of the pull-apart basin of the Hesperides Deep and the important compression-subduction component of the Scotia Plate over the ridge. En Espa&#241ol: Los objetivos de la campa&#241a fueron: -Transici&#243n entre diferentes placas y sub-placas; Shetland, Drake, Scotia y Ant&#225rtica y sus puntos de uni&#243n. -Estudio del enlace entre el centro de expansi&#243n de Bransfield y la zona de subduccI&#243n de las Shetlands del sur. -An&#225lisis morfoestructural detallado de un borde de placas cizallante y de una de las grandes depresiones intracrestas (fosa Hesp&#233rides), mediante la utilizaci&#243n de las sondas multihaz. -Establecimiento de pautas geomagn&#233ticas en la zona de expansi&#243n de Bransfield y en los bordes de placas cizallantes. -Estudio de la formaci&#243n de rellenos y discontinuidades regionales en las cuencas adyacentes a la dorsal. -Aplicaci&#243n de los modelos estudiados dentro de los planes de trabajo internacionales en dorsales Oce&#225nicas (proyecto InterRidge). Datos Obtenidos - M&#225s de 1.500 km de s&#237smica multicanal - 3.500 km de sondas multihaz - 3.500 km de sondador Hidrogr&#225fico - 3.500 km de datos geomagn&#233ticos Se reconoci&#243 con insonificaci&#243n al 100% una depresi&#243n intracresta, de lA Dorsal Sur de Scotia , denomin&#225ndola FOSA HESPERIDES en honor del B/O hesperides en su primera campa&#241a Ant&#225rtica. -Estudio del Estrecho de Bransfield , un Semi-Graben con actividad reciente y crestas neovolc&#225nicas indicativas de un proceso inicial de Sea-floor spreading. -Se reconoci&#243 La Dorsal sur de Scotia, estableciendose su Morfoestructura -Establecimiento del caracter sismotect&#243nico de la Placa Scotia y Cuenca de Powell. -Se puso de manifiesto el origen de cuenca Pull-apart de la Fosa Hesperides y de la importante componente de compresi&#243n-Subducci&#243n de la placa Scotia bajo la Dorsal.

Purpose:

Not Available

Supplemental_Information:

Not Available

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19920206

Ending_Date: 19920224

Currentness_Reference:Unknown

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -62.0

East_Bounding_Coordinate: -48.0

North_Bounding_Coordinate: -59.0

South_Bounding_Coordinate: -64.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD PLATFORM

Theme_Keyword_Thesaurus: GCMD INSTRUMENT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR RADIATION

Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY

Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > CONTINENTAL MARGINS > CONTINENTAL SHELVES

Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > FRACTURE ZONES

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE GEOPHYSICS > MARINE GRAVITY FIELD

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE GEOPHYSICS > MARINE MAGNETICS

Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > OCEAN PLATEAUS/RIDGES

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE VOLCANISM > RIFT VALLEYS

Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > TRENCHES

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN OPTICS > FLUORESCENCE

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE

Theme_Keyword: EARTH SCIENCE > OCEANS > SALINITY/DENSITY > CONDUCTIVITY

Theme_Keyword: EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > SEISMIC PROFILE

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE GEOPHYSICS > PLATE TECTONICS > SEAFLOOR SPREADING

Theme_Keyword: EARTH SCIENCE > OCEANS > MARINE GEOPHYSICS > PLATE TECTONICS > SUBDUCTION

Theme_Keyword: SHIPS

Theme_Keyword: GRAVIMETERS

Theme_Keyword: THERMOSALINOGRAPHS

Theme_Keyword: MAGNETOMETERS

Theme_Keyword: GPS > GLOBAL POSITIONING SYSTEM

Theme_Keyword: SEISMIC REFLECTION PROFILERS

Theme_Keyword: ECHO SOUNDERS

Theme_Keyword: FLUOROMETERS

Theme_Keyword: Antarctic Plate

Theme_Keyword: Geodynamics

Theme_Keyword: Plate Boundary

Theme_Keyword: Scotia Plate

Theme_Keyword: Triple Junction

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: ELEVATION

Theme_Keyword: GEOSCIENTIFIC INFORMATION

Theme_Keyword: OCEANS

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: CONTINENT > ANTARCTICA > ANTARCTIC PENINSULA > SCOTIA SEA > SOUTH SHETLAND ISLANDS > ELEPHANT ISLAND

Place_Keyword: GEOGRAPHIC REGION > POLAR

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: JUAN ACOSTA

Contact_Position: INVESTIGATOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Instituto Espanol de Oceanografia

Address: C/ Corazon de Maria no. 8

City: Madrid

Postal_Code: 28002

Country: SPAIN

Contact_Voice_Telephone: +34913473600

Contact_Facsimile_Telephone: +34914135597

Contact_Electronic_Mail_Address: Juan.acosta@md.ieo.es

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: ES/CSIC/UTM > Unidad de Tecnologia Marina, Consejo Superior de Investigaciones Cientificas, Espana

Contact_Person: MIGUEL ANGEL OJEDA

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Centro Mediterraneo de Investigaciones Marinas y Ambientales

Address: CSIC

Address: Unidad de Tecnologia Marina

Address: Paseo Maritimo, 37-39

City: Barcelona

Postal_Code: 08003

Country: SPAIN

Contact_Voice_Telephone: +34932216416

Contact_Electronic_Mail_Address: maojeda@utm.csic.es

Resource_Description: He003 Campa?a Bio Hesperides

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ASCII, BINARY

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.utm.csic.es/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://ugbo.icm.csic.es/Hesperides/hesperides.htm

Access_Instructions:

In English: Information on the vessel's Hesperides, oceanographic expeditions can be found on this page. The information includes a summary of the scientific results, participating agencies, and other data. En Espa&#241ol: En esta p&#225gina se encuentra informaci&#243n sobre la campa&#241as realizadas por el Buque Oceanogr&#225fico Hesp&#233rides: Resumen de los resultados cient&#237ficos, organismos participantes y otros datos.

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20010612

Metadata_Review_Date: 20030924

Metadata_Future_Review_Date: 20011201

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: ANTONIO BARRAGAN SANABRIA

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Centro Nacional de Datos Antarticos

Address: Instituto Geologico y Minero de Espana

Address: c/Rios Rosas 23

City: Madrid

Postal_Code: 28003

Country: SPAIN

Contact_Voice_Telephone: +34913495731

Contact_Facsimile_Telephone: +34913495929

Contact_Electronic_Mail_Address: a.barragan@igme.es

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time