S‐velocity model and inferred Moho topography beneath the Antarctic Plate from Rayleigh waves

Journal of Geophysical Research: Solid Earth - Tập 120 Số 1 - Trang 359-383 - 2015
Meijian An1, Douglas A. Wiens2, Yue Zhao1, Mei Feng1, A. Nyblade3, Masaki Kanao4, Yuansheng Li5, Alessia Maggi6, Jean Jacques Lévêque6
1Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, China
2Department of Earth and Planetary Science; Washington University; St. Louis Missouri USA
3Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania, USA
4National Institute of Polar Research, Tokyo, Japan
5Polar Research Institute in China Shanghai China
6Institut de Physique du Globe de Strasbourg Université de Strasbourg/EOST, CNRS Strasbourg France

Tóm tắt

AbstractSince 2007/2008, seismographs were deployed in many new locations across much of Antarctica. Using the records from 122 broadband seismic stations, over 10,000 Rayleigh wave fundamental‐mode dispersion curves have been retrieved from earthquake waveforms and from ambient noise. Using the processed data set, a 3‐D S‐velocity model for the Antarctic lithosphere was constructed using a single‐step surface wave tomographic method, and a Moho depth map was estimated from the model. Using the derived crustal thicknesses, the average ratio of lithospheric mantle and crustal densities of Antarctica was calculated. The calculated density ratio indicates that the average crustal density for Antarctica is much higher than the average values for continental crust or the average density of lithospheric mantle is so low as to be equal to low‐density bound of Archean lithosphere. The latter implies that the lithospheric mantle in much of Antarctica should be old and of Archean age. The East Antarctic Mountain Ranges (EAMOR) represent a thick crustal belt, with the thickest crust (~60 km) located close to Dome A. Very high velocities can be found at depths greater than 200 km beneath parts of East Antarctica, demonstrating that the continental lithosphere extends deeper than 200 km. The very thick crust beneath the EAMOR may represent the collision suture of East Gondwana with Indo‐Antarctica and West Gondwana during the Pan‐African orogeny.

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Tài liệu tham khảo

10.1098/rstl.1855.0003

10.1111/j.1365-246X.2012.05661.x

10.1007/s10950-005-2841-8

10.1016/j.jsames.2006.03.001

10.1016/j.pepi.2006.08.002

10.1007/s11430-007-0071-3

10.1017/S0954102014000704

10.1029/2000JB900439

10.1016/j.tecto.2012.11.014

10.1016/j.tecto.2012.12.023

Bassin C., 2000, The current limits of resolution for surface wave tomography in North America, Eos Trans. AGU, 81, F897

10.1111/j.1365-246X.2009.04196.x

10.1130/0091-7613(1996)024<0407:CTVITC>2.3.CO;2

10.1029/91TC00868

Bell R. E., 2008, Antarctica: A Keystone in a Changing World—Online Proceedings of the 10th International Symposium on Antarctic Earth Sciences, kp02

10.1130/g23825a.1

10.1016/j.epsl.2009.09.022

10.1016/j.gr.2010.09.003

10.1016/s0012-821x(01)00587-8

10.1029/2000JB900285

10.1016/j.earscirev.2006.08.003

10.1126/science.274.5285.222

10.1038/311555a0

Cazenave A., 1995, Global Earth Physics: A Handbook of Physical Constants, 32

10.1002/2013JB010642

10.1029/92GL00161

10.1029/95JB03446

10.1029/95JB00259

10.1016/s0012-821x(02)01048-8

10.1029/2010GL045106

10.1029/2001GL013431

10.1111/j.1365-246X.1965.tb03056.x

10.1029/94JB00138

10.1016/0031-9201(81)90046-7

Dziewonski A. M., 1969, A technique for analysis of transient seismic signals, Bull. Seismol. Soc. Am., 59, 427, 10.1785/BSSA0590010427

10.1029/96JB03729

Engdahl E. R., 1998, Global teleseismic earthquake relocation with improved travel times and procedures for detph determination, Bull. Seismol. Soc. Am., 88, 722, 10.1785/BSSA0880030722

10.1111/j.1365-246X.1960.tb01704.x

10.1016/0301-9268(88)90076-9

Faure G., 2010, The Transantarctic Mountains: Rocks, Ice, Meteorites and Water, 804

10.1029/2008JB005787

10.1016/j.pepi.2004.07.008

10.1029/2006JB004449

10.1016/j.lithos.2009.11.017

Feng M., 2014, Crustal thicknesses along the traverse from Zhongshan to Dome A in Eastern Antarctica, Chin. J. Polar Res., 26, 177

10.1038/nature10566

10.1111/j.1365-246X.2011.04946.x

10.1146/annurev-earth-040809-152438

10.1016/s0899-5362(00)00069-5

10.1144/gsl.sp.2003.206.01.07

10.1016/0301-9268(94)90093-0

10.5194/tc-7-375-2013

10.1029/1999JB900300

10.1029/2000TC001218

10.1029/2009GC002576

10.1016/j.epsl.2010.10.022

10.1130/g21081.1

10.1029/2006JB004663

10.1029/98TC01314

10.1002/jgrb.50171

10.1007/BF03029991

Herrin E., 1977, Phase‐matched filters: Application to the study of Rayleigh waves, Bull. Seismol. Soc. Am., 67, 1259, 10.1785/BSSA0670051259

Herrmann R. B., 2002, Computer Programs in Seismology: Surface Waves, Receiver Functions, and Crustal Structure

10.1038/307023a0

10.1016/B978-044452748-6.00123-1

10.1144/0016-76492007-109

10.1016/j.precamres.2007.07.009

10.1016/j.lithos.2003.07.009

10.1111/j.1365-246X.1991.tb06724.x

10.1016/B0-08-043751-6/03033-4

10.1007/bf00879981

10.1016/S0012-821X(03)00600-9

Laske G. G.Marsters andC.Reif(2000) CRUST2.0: A new global crustal model at 2°×2°. [Available athttp://mahi.ucsd.edu/Gabi/rem.html.]

10.1029/2006GC001282

10.1130/g24363a.1

10.1360/03yd9028

10.1016/j.precamres.2005.11.017

10.1002/ggge.20098

10.1016/s0012-821x(03)00245-0

10.1130/0091-7613(1986)14<574:totocw>2.0.co;2

10.1016/j.epsl.2005.02.005

Mohorovičić A., 1910, Potres od 8. X. 1909, Godišnje izvješće Zagrebačkog meteorološkog opservatorija za godinu, 1909, 1

10.1016/B978-044452748-6.00011-0

10.1029/97JB02122

10.1016/j.gloplacha.2003.12.005

10.1130/0091-7613(1993)021<0275:rpmrtt>2.3.co;2

Nyman D. C., 1977, The display equalized filter for frequency‐time analysis, Bull. Seismol. Soc. Am., 67, 393, 10.1785/BSSA0670020393

10.1016/j.epsl.2013.11.051

10.1029/96JB01758

10.1145/355993.356000

10.1145/355984.355989

10.1016/s0012-821x(00)00362-9

10.1130/2007.2425(18)

10.1029/2001JB000179

10.1016/0031-9201(94)90033-7

10.1559/152304003100011090

10.1046/j.1365-246X.2002.01742.x

Siebert L. andT.Simkin(2002) Volcanoes of the World: An illustrated catalog of holocene volcanoes and their eruptions Smithsonian Institution.

10.1016/j.earscirev.2006.03.007

Steinhart J. S., 1967, International Dictionary of Geophysics, 991

10.1016/s0012-821x(04)00066-4

Sutherland R., 2008, Antarctica: A Keystone in a Changing World—Online Proceedings of the 10th International Symposium on Antarctic Earth Sciences, kp10

10.1016/S1571-9197(08)00007-4

10.1029/2005GC001040

10.1029/97JB02483

10.1016/j.tecto.2013.10.004

10.1130/0-8137-1197-5.1

Torsvik T. H., 2008, Antarctica: A Keystone in a Changing World—Online Proceedings of the 10th International Symposium on Antarctic Earth Sciences, kp11

10.1016/j.epsl.2009.12.055

10.1046/j.1365-246x.2001.00307.x

10.1017/CBO9780511807442

10.1029/2008GL035564

10.1130/0091-7613(1994)022<0593:cftgsm>2.3.co;2

10.1016/j.gr.2011.03.007

10.1016/j.sedgeo.2008.08.003

10.1029/2008GC002149

10.1029/JB075i017p03264

10.1016/B978-044452748-6/00100-0

10.1029/90EO00319

10.1029/92JB01749

10.1029/2003GL018001

10.1130/g20768.1

10.1016/S0012-821X(02)00589-7

10.1038/366557a0

Zhao Y., 1995, Early Paleozoic (Pan African) thermal event of the Larsemann Hills and its neighbours, Prydz Bay, East Antarctica, Sci. China (B), 38, 74

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Journal of Geophysical Research: Solid Earth

Tập 120 Số 1

359-383

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