New seismic data support Cenozoic rifting in George VI Sound, Antarctic Peninsula

被引：15

作者：

Bell, AC ^{[1
]}

King, EC ^{[1
]}

机构：

[1] British Antarctic Survey, Cambridge CB3 0ET, England

来源：

GEOPHYSICAL JOURNAL INTERNATIONAL | 1998年 / 134卷 / 03期

关键词：

Cenozoic rifting; George VI Sound; postglacial sedimentation; rift segmentation; seismic reflection; synthetic-aperture radar;

D O I：

10.1046/j.1365-246x.1998.00605.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

New multifold seismic-reflection and wide-angle reflection/refraction data across George VI Sound, Antarctic Peninsula, show the presence of graben and horst structures indicating an extensional origin. The data suggest that rocks of an accretionary complex and fore-are basin underlie the Sound and are in faulted contact along its eastern boundary with volcanic and plutonic rocks of the associated Mesozoic are of western Palmer Land. A cover of possible syn- and postglacial Cenozoic deposits drapes the structures. The combination of new seismic, synthetic-aperture radar and previously acquired data suggests subduction-related rifting in the Sound was segmented, with opening in the south predominately by normal extension whilst in the north, dextral transtension predominated.

引用

页码：889 / 902

页数：14

共 53 条

[1]

[Anonymous], BRIT ANTARCTIC SURVE

[2]

[Anonymous], GEOLOGICAL EVOLUTION

[3]

AYLING ME, 1984, BR ANTARCTIC SURVEY, V105, P1

[4] THE CENOZOIC SUBDUCTION HISTORY OF THE PACIFIC MARGIN OF THE ANTARCTIC PENINSULA - RIDGE CREST TRENCH INTERACTIONS [J].