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
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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
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Spatial_Reference_Information:
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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
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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
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