Antarctic Moho Compilation of AN-Moho

We collected crustal thickness and/or Moho depth data from previous seismic studies (not including surface wave studies), and made a compilation of ANtarctic Moho positions (AN-Moho), under the evaluation of the quality of Moho depths. Considering that the crustal thickness or Moho depth given in previous studies may be variably defined, we corrected all thickness data to the same crustal thickness definition. Therefore, slight differences are evident between the data of our AN-Moho as compared with previous compilations and also data presented in previous studies because of different definitions.

Moho depths in the compilation of AN-Moho for Antarctica is shown in Figure 1 (= Figure 4 in An et al. [2015a]). All the Moho depths and the previous studies that the Moho depths come from are listed in Table 1 (= Table S1 in An et al. [2015a]). It is noted that the Moho depth in Table 1 is from sea level to the Moho discontinuity, but crustal thickness is from the solid surface. More details of how this compilation was constructed can be found in a supplementary section to:

An Meijian, Douglas Wiens, Zhao Yue, Feng Mei, Andrew A. Nyblade, Masaki Kanao, Li Yuansheng, Alessia Maggi, Jean-Jacques Lévêque, 2015a, S-velocity Model and Inferred Moho Topography beneath the Antarctic Plate from Rayleigh Waves. J. Geophys. Res., 120(1),359–383, doi:10.1002/2014JB011332.

Figure 1. Crustal thicknesses in the compilation of AN-Moho for Antarctica. Typos in longitude of WRS* stations in Ross Sea in Figure 4 in An et al. [2015a] were corrected in this figure. [download PDF]

Table 1. Crustal thicknesses in the compilation of AN-Moho [An et al., 2015a]
(Typos in longitude of WRS* stations in Ross Sea were corrected in this table)

All data sources in Table 1 are:

1. Hoffmann, M., Eckstaller, A., Jokat, W. & Miller, H. in Workshop "East-West Antarctic Tectonics and Gondwana Breakup 60W to 60E" at ISAES IX meeting, September 8-12    (Potsdam, 2003).

2. Jokat, W., Ritzmann, O., Reichert, C. & Hinz, K. Deep Crustal Structure of the Continental Margin off the Explora Escarpment and in the Lazarev Sea, East Antarctica. Mar Geophys Res 25, 283-304, doi:10.1007/s11001-005-1337-9 (2004).

3. Kolmakov, A. F., Mishenkin, B. P. & Solovyev, D. S. Deep seismic studies in East Antarctica. Bulletin of Soviet Antarctic expedition , 5-15 (1975).

4. Baranov, A. & Morelli, A. The Moho depth map of the Antarctica region. Tectonophysics 609, 299-313, doi: http://dx.doi.org/10.1016/j.tecto.2012.12.023 (2013).

5. Bannister, S., Yu, J., Leitner, B. & Kennett, B. L. N. Variations in crustal structure across the transition from West to East Antarctica, Southern Victoria Land. Geophysical Journal International 155, 870-880, doi:10.1111/j.1365-246X.2003.02094.x (2003).

6. Bayer, B., Geissler, W. H., Eckstaller, A. & Jokat, W. Seismic imaging of the crust beneath Dronning Maud Land, East Antarctica. Geophysical Journal International 178, 860-876, doi:10.1111/j.1365-246X.2009.04196.x (2009).

7. Agostinetti, N. P., Amato, A., Cattaneo, M. & Di Bona, M. Crustal structure of northern Victoria Land from receiver function analysis. Terra Antarctica 11, 5-14 (2004).

8. Reading, A. M. The seismic structure of Precambrian and early Palaeozoic terranes in the Lambert Glacier region, East Antarctica. Earth and Planetary Science Letters 244, 44-57, doi: http://dx.doi.org/10.1016/j.epsl.2006.01.031 (2006).

9. Chaput, J. et al. The Crustal Thickness of West Antarctica. J. Geophys. Res., submitted (2014).

10. Winberry, J. P. & Anandakrishnan, S. Crustal structure of the West Antarctic rift system and Marie Byrd Land hotspot. Geology 32, 977-980, doi:10.1130/g20768.1 (2004).

11. Lawrence, J. F. et al. Crust and upper mantle structure of the Transantarctic Mountains and surrounding regions from receiver functions, surface waves, and gravity: Implications for uplift models. Geochem. Geophys. Geosyst. 7, Q10011, doi:10.1029/2006gc001282 (2006).

12. Reading, A. M. The Seismic Structure of Wilkes Land/Terre Adelie, East Antarctica and Comparison with Australia: First Steps in Reconstructing the Deep Lithosphere of Gondwana. Gondwana Research 7, 21-30, doi: http://dx.doi.org/10.1016/S1342-937X(05)70303-8 (2004).

13. Feng, M. et al. Crustal Thicknesses along the Traverse from Zhongshan to Dome A in Eastern Antarctica. Chinese J. Polar Research 26, 177-185 (2014).

14. Leitchenkov, G. & Kudryavtzev, G. Structure and origin of the Earth's Crust in the Weddell Sea Embayment (beneath the Front of the Filehner and Ronne lee Shelves) from deep seismic sounding data. Polarforschung 67, 143-154 (1997).

15. Kanao, M. & Shibutani, T. in Seismic Waves - Research and Analysis    (ed Masaki Kanao)  237-252 (InTech, 2012).

16. Guterch, A., Grad, M., Janik, T., Perchuć, E. & Pajchel, J. Seismic studies of the crustal structure in West Antarctica 1979–1980—Preliminary results. Tectonophysics 114, 411-429, doi: http://dx.doi.org/10.1016/0040-1951(85)90024-1 (1985).

17. Finotello, M., Nyblade, A., Julia, J., Wiens, D. & Anandakrishnan, S. Crustal Vp–Vs ratios and thickness for Ross Island and the Transantarctic Mountain front, Antarctica. Geophysical Journal International 185, 85-92, doi:10.1111/j.1365-246X.2011.04946.x (2011).

18. Hansen, S. E. et al. Using S wave receiver functions to estimate crustal structure beneath ice sheets: An application to the Transantarctic Mountains and East Antarctic craton. Geochem. Geophys. Geosyst. 10, Q08014, doi:10.1029/2009gc002576 (2009).

19. Trey, H. et al. Transect across the West Antarctic rift system in the Ross Sea, Antarctica. Tectonophysics 301, 61-74, doi: http://dx.doi.org/10.1016/S0040-1951(98)00155-3 (1999).

20. Vuan, A. Joint Inversion of Receiver Function of Teleseismic Body Waves and Local Group Velocity Dispersion Curves beneath ESPZ and PMSA Stations (Antarctic Peninsula). Terra Antarctica 8, 49-54 (2001).

21. Hansen, S. E. et al. Crustal structure of the Gamburtsev Mountains, East Antarctica, from S-wave receiver functions and Rayleigh wave phase velocities. Earth and Planetary Science Letters 300, 395-401, doi:10.1016/j.epsl.2010.10.022 (2010).

22. Miyamachi, H. et al. A refraction and wide-angle reflection seismic exploration in JARE-43 on the Mizuho Plateau, East Antarctica. Polar Geoscience 16, 1-21 (2003).

23. Yoshii, K., Ito, K., Miyamachi, H. & Kanao, M. Crustal structure derived from refractions and wide-angle reflections in the Mizuho Plateau, East Antarctica. Polar Geoscience 17, 112-138 (2004).

24. McGinnis, L. D., Bowen, R. H., Erickson, J. M., Allred, B. J. & Kreamer, J. L. East-West Antarctic boundary in McMurdo sound. Tectonophysics 114, 341-356, doi: http://dx.doi.org/10.1016/0040-1951(85)90020-4 (1985).

25. Ikami, A. & Ito, K. Crustal structure in the Mizuho Plateau, East Antarctica, by a two-dimensional ray approximation. Journal of Geodynamics 6, 271-283, doi: http://dx.doi.org/10.1016/0264-3707(86)90044-X (1986).

26. Jokat, W., Fechner, N. & Studinger, M. in The Antarctic Region: Geological Evolution and Processes   (ed C.A. Ricci) 453-459 (Terra Antartica Publication, 1997).

27. Kudryavtzev, G. A., Butzenko, V. V. & Kadmina, I. N. in Sixth international sysmposium on Antarctic earth sciences    330-335 (National Institute for Polar Research, 1991).

28. Studinger, M. et al. Geophysical models for the tectonic framework of the Lake Vostok region, East Antarctica. Earth and Planetary Science Letters 216, 663-677 (2003).

29. Isanina, E. V., Krupnova, N. A., Popov, S. V., Masolov, V. N. & Lukin, V. V. Deep structure of the Vostok Basin, East Antarctica as deduced from seismological observations. Geotectonics 43, 221-225, doi:10.1134/s0016852109030042 (2009).

30. Eittreim, S. L. Transition from continental to oceanic crust on the Wilkes-Adelie margin of Antarctica. Journal of Geophysical Research: Solid Earth 99, 24189-24205, doi:10.1029/94jb01903 (1994).