Jurnal Internasional Kepadatan 3D, model termal dan komposisi litosfer Antartika dan implikasinya bagi evolusinya – Haeger – – Geokimia, Geofisika, Geosystems

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Jurnal Internasional Kepadatan 3D, model termal dan komposisi litosfer Antartika dan implikasinya bagi evolusinya – Haeger – – Geokimia, Geofisika, Geosystems

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Antarctica remains one of the least studied regions on Earth, because large ice masses and climatic conditions severely inhibit measurement. It plays an important role in global phenomena such as changes in sea level. To understand and predict this process, we need knowledge of heat coming from the earth's interior. Recently it has been recognized that the thermal state of the lithosphere, the rigid outer shell of the Earth, plays an important role in controlling the protective dynamics of ice and, thus, changes in global sea level. Therefore, we make a lithospheric model that describes variations in temperature, density and composition. Previously, the model was made using several single data sets (usually seismic tomography). We use a new integrative approach, combining several data sets to create a comprehensive 3D model of the Antarctic lithosphere. The combination of various data sets provides a more powerful model than when using a single approach. Our results from the Antarctic continent show strong differences between East and West Antarctica in temperature and density to a depth of about 200 km. Areas with variations in negative composition density and low temperatures were identified in East Antarctica and interpreted as much older than the surrounding continents.

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