Multiscale Brazil nut effects in bioturbated sediment

Autor: Tatiana Savranskaia, Ramon Egli, Jean-Pierre Valet

Publikováno v: Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)

Abstract Size segregation in granular materials is a universal phenomenon popularly known as the Brazil nut effect (BNE), from the tendency of larger nuts to end on the top of a shaken container. In nature, fast granular flows bear many similarities

Externí odkaz: https://doaj.org/article/038e9f96c1d44774843c4b92aa87d437

Impact of turbulence on magnetic alignment in sediments

Autor: Édouard G. H. Philippe, Jean-Pierre Valet, Guillaume St-Onge, Ramon Egli

Publikováno v: Frontiers in Earth Science, Vol 10 (2022)

Rapidly deposited layers (RDL) such as turbidites or hyperpycnites are mostly studied for their sedimentological properties, but are carefully avoided in paleomagnetic studies due to the disturbances caused by such sudden and rapid sediment accumulat

Externí odkaz: https://doaj.org/article/0f9e859e753848d0a233c5c810a7d836

Two Records of Relative Paleointensity for the Past 4 Myr

Autor: Jean-Pierre Valet, Anojh Thevarasan, Franck Bassinot, Tatiana Savranskaia, Naoufel Haddam

Publikováno v: Frontiers in Earth Science, Vol 8 (2020)

We performed new high-resolution magnetic measurements of sedimentary cores from the east northern Pacific ODP Site 1021 and the East equatorial Pacific ODP Site 851. ODP Site 1021 is characterized by a high clay content with less than 10% carbonates

Externí odkaz: https://doaj.org/article/802ecd5bc8ea445d8fd114d80a88d991

1.2-million-year band of Earth–Mars obliquity modulation on the evolution of cold late Miocene to warm early Pliocene climate

Autor: Jie Qin, Rui Zhang, Vadim Kravchinsky, Jean-Pierre Valet, Leonardo Sagnotti, Jianxing Li, Yong Xu, Taslima Anwar, Leping Yue

The climatic transitions during the Miocene–Pliocene epochs had significant impacts on the worldwide biological diversity and were associated with large turnovers of continental vegetation and fauna. Previous studies have shown that late Miocene co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4528fc90b38392e38e3bf2160480edce
https://doi.org/10.1002/essoar.10510387.2

Disentangling magnetic and environmental signatures of sedimentary 10Be/9Be records

Autor: Didier Bourlès, Quentin Simon, Tatiana Savranskaia, Ramon Egli, Nicolas Thouveny, Franck Bassinot, Laure Meynadier, Jean-Pierre Valet

Publikováno v: Quaternary Science Reviews
Quaternary Science Reviews, 2021, 257, ⟨10.1016/j.quascirev.2021.106809⟩
Quaternary Science Reviews, Elsevier, 2021, 257, ⟨10.1016/j.quascirev.2021.106809⟩
Quaternary Science Reviews (0277-3791) (Elsevier BV), 2021-04, Vol. 257, P. 106809 (19p.)

Reconstructions of the global production rate of the cosmogenic isotope 10Be from sedimentary records of authigenic 10Be/9Be ratios have been successfully used to obtain independent estimates of geomagnetic dipole moment variations caused by field ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a2586137f1c512d2644054892a1991d
https://hal.science/hal-03165775