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Transtensional basins in the Western Sunda Strait
Author(s) -
Lelgemann Heidrun,
Gutscher MarcAndré,
Bialas Jörg,
Flueh Ernst R.,
Weinrebe Wilhelm,
Reichert Christian
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011635
Subject(s) - geology , graben , trench , bathymetry , basement , seismology , seismic refraction , transtension , geophysical survey , reflection (computer programming) , back arc basin , horst and graben , paleontology , tectonics , subduction , geophysics , oceanography , rift , chemistry , civil engineering , organic chemistry , layer (electronics) , computer science , engineering , programming language
In 1999 a marine geophysical survey collected bathymetric imagery, seismic reflection and refraction data to investigate the crustal structure and evolution of the Sunda Strait, which is linked to the obliquely convergent geodynamic setting of the Sumatran trench. The transtensional character of the study area is manifested in faulted blocks of arc basement and active normal faults detected on both sides of a large graben at the western entrance to the Sunda Strait. The combined interpretation of reflection and wide‐angle data reveals over 6 km of sediment graben fill associated with substantial crustal thinning. The southern part of the study region is only 50 km from the trench and the Moho of the downgoing plate is found at a depth of 28 km.