Tectonics of an extinct ridge-transform intersection, Drake Passage (Antarctica)

被引：0

作者：

Andrés Maldonado

Juan Carlos Balanyá

Antonio Barnolas

Jesús Galindo-Zaldívar

Javier Hernández

Antonio Jabaloy

Roy Livermore

José Miguel Martínez-Martínez

José Rodríguez-Fernández

Carlos Sanz de Galdeano

Luis Somoza

Emma Suriñach

César Viseras

机构：

[1] CSIC/Universidad de Granada,Instituto Andaluz Ciencias de la Tierra

[2] Facultad de Ciencias,Departamento de Geodinámica

[3] Universidad de Granada,Departament de Geologia Dinàmica i Geofísica

[4] Instituto Tecnológico Geominero de España,Departamento de Estratigrafía y Paleontología

[5] Facultad de Ciencias del Mar,undefined

[6] British Antarctic Survey,undefined

[7] Universitat de Barcelona,undefined

[8] Universidad de Granada,undefined

来源：

Marine Geophysical Researches | 2000年 / 21卷

关键词：

Drake Passage; oceanic crust stratigraphy; ridge-transform intersection; tectonics;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

New swath bathymetric, multichannel seismic and magnetic data reveal the complexity of the intersection between the extinct West Scotia Ridge (WSR) and the Shackleton Fracture Zone (SFZ), a first-order NW-SE trending high-relief ridge cutting across the Drake Passage. The SFZ is composed of shallow, ridge segments and depressions, largely parallel to the fracture zone with an `en echelon' pattern in plan view. These features are bounded by tectonic lineaments, interpreted as faults. The axial valley of the spreading center intersects the fracture zone in a complex area of deformation, where N120° E lineaments and E–W faults anastomose on both sides of the intersection. The fracture zone developed within an extensional regime, which facilitated the formation of oceanic transverse ridges parallel to the fracture zone and depressions attributed to pull-apart basins, bounded by normal and strike-slip faults.

引用

页码：43 / 68

页数：25

共 163 条

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