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dc.contributor.authorallHantke, R.; Glärnischstrasse 3, Stafä ZH, Switzerlanden
dc.contributor.authorallScheidegger, A. E.; Geophysics Section, Technological University, Vienna, Austriaen
dc.description.abstractA study is made of the orientations (strikes/trends) of joints, valleys, ridges and lineaments, i.e. of the (potentially) morphotectonic features, of the Mascarene Islands (Reunion, Mauritius and Rodrigues) in the Indian Ocean. It turns out that a connection exists between these features on all islands. For the joints alone, the results for Mauritius as a whole agree closely with those for Rodrigues as a whole, and also partially with those of Reunion. Inasmuch as the trends of the valleys, ridges and lineaments are related to the trends (strikes) of the joints, a common morphotectonic predesign seems to be present for all features studied. The morphotectonic orientations on the island also agree closely with the trends of fracture zones, ridges and trenches in the nearby ocean bottom; which has had a bearing on the theories of the origin of the Mascarene Islands. Generally, a hot-spot origin is preferred for Reunion, and may be for Mauritius as well, although differing opinions have also been voiced. The dynamics of a hot-spot is hard to reconcile with the close fit of the joint strikes in Réunion with the trends of the Madagascar and Rodrigues fracture zones. The closely agreeing joint maxima in Mauritius and Rodrigues í across the deep Mauritius trench í also agree with the trend of that trench and with the trend of the Rodrigues fracture zone. Thus, it would appear as most likely that the trends of joints and of fracture zones are all part of the same pattern and are due to the same cause: viz. to action of the neotectonic stress field.en
dc.format.extent5060730 bytesen
dc.relation.ispartofseries2/41 (1998)en
dc.subjectIndian Ocean flooren
dc.subjecthot spotsen
dc.subjectoceanic islandsen
dc.titleMorphotectonics of the Mascarene Islandsen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.08. Volcanic arcsen
dc.description.journalTypeJCR Journalen
dc.contributor.authorHantke, R.en
dc.contributor.authorScheidegger, A. E.en
dc.contributor.departmentGlärnischstrasse 3, Stafä ZH, Switzerlanden
dc.contributor.departmentGeophysics Section, Technological University, Vienna, Austriaen
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crisitem.classification.parent04. Solid Earth-ärnischstrasse 3, Stafä ZH, Switzerland- Section, Technological University, Vienna, Austria-
Appears in Collections:Annals of Geophysics
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