Map of the active fault system across the oceanic lithosphere of the Mozambique Channel, from the data of the PTOLEMEE (2014), PAMELA-MOZ02 (2014) and PAMELA-MOZ04 (2015) marine expeditions

Date 2018-06-22
Author(s) Marsset TaniaORCID1, Jouet Gwenael1, Courgeon Simon4, Jatiault Romain2, Deville Eric3
Affiliation(s) 1 : IFREMER, France
2 : TOTAL, France
3 : IFPEN, France
4 : University of Geneva, Switzerland
DOI 10.17882/55634
Publisher SEANOE
Keyword(s) Active faults, Mozambique Channel, plate boundary, Nubia plate, Somalia plate
Abstract

Seismic reflection and multibeam echosounder data were acquired in the Mozambique Channel in 2014 and 2015 during the PTOLEMEE, PAMELA-MOZ02 and -MOZ04 marine surveys onboard the RV Atalante and Pourquoi Pas? These data revealed that an active fault system is deforming the oceanic lithosphere of the Mozambique Basin which has developed during Jurassic-Cretaceous times. The correlation between the fault system and the arrangement of the associated earthquake epicenters suggests that this tectonically active zone directly connects northward with the southern part of the eastern branch of East African Rift System which corresponds to the seismically active graben system bounding the northern part of the Davie ridge. The fault zone extends southwestward of the Mozambique Ridge along the same trend as the Agulhas-Falkland transform fault zone. The general organization of the fault zone shows the characteristics of an extensional system north of the Mozambique Channel (north of the Europa Island) and a right-lateral transtensional system with coeval normal faults and strike-slip faults south-west of Europa. This tectonic activity is associated with volcanic activity since at least Late Miocene times. Our findings highlight that the eastern branch of the East African Rift System is extending largely toward the south, not only in continental domains but also through the oceanic lithosphere of the Mozambique basin. This fault zone is participating to the complex plate boundary between the African main continent (Nubia Plate) and Madagascar (Somalia Plate).Digital data (.csv) are available as an attached file.

Licence CC-BY-NC-SA
Data
File Size Format Processing Access
Faults and sedimentary features Mozambique Channel 65 KB CSV Quality controlled data Open access
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How to cite 

Marsset Tania, Jouet Gwenael, Courgeon Simon, Jatiault Romain, Deville Eric (2018). Map of the active fault system across the oceanic lithosphere of the Mozambique Channel, from the data of the PTOLEMEE (2014), PAMELA-MOZ02 (2014) and PAMELA-MOZ04 (2015) marine expeditions. SEANOE. https://doi.org/10.17882/55634


In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication :


Deville Eric, Marsset Tania, Courgeon Simon, Jatiault Romain, Ponte Jean Pierre, Thereau Estelle, Jouet Gwenael, Jorry Stephan, Droz Laurence (2018). Active fault system across the oceanic lithosphere of the Mozambique Channel: Implications for the Nubia–Somalia southern plate boundary. Earth And Planetary Science Letters, 502, 210-220. https://doi.org/10.1016/j.epsl.2018.08.052