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Flood Basalt from Mont Tourmente in the Central Kerguelen Archipelago: the Change from Transitional to Alkalic Basalt at ~25 Ma |
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| Authors: | FREY, F. A. NICOLAYSEN, K. KUBIT, B. K. WEIS, D. GIRET, A. |
| Affiliation: | 1DEPARTMENT OF EARTH, ATMOSPHERIC AND PLANETARY SCIENCES, MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE, MA 02139, USA 2DEPARTMENT OF GEOSCIENCES, UNIVERSITY OF MASSACHUSETTS, AMHERST, MA 01003, USA 3DEPARTMENT OF EARTH AND ENVIRONMENTAL SCIENCES, CP 160/02, UNIVERSITÉ LIBRE DE BRUXELLES, AV. F. D. ROOSEVELT, 50, B-1050, BRUSSELS, BELGIUM 4LABORATOIRE DE GÉOLOGIE, UNIVERSITÉ JEAN MONNET, CNRS–UMR 6524, 23 RUE DU DOCTEUR PAUL MICHELON, 42023, SAINT-ÉTIENNE, CEDEX 2, FRANCE |
| Abstract: | The surface of the Cenozoic Kerguelen Archipelago, constructedon the Kerguelen Plateau in the southern Indian Ocean, is dominantlyflood basalt. With the objective of understanding the Cenozoichistory of the Kerguelen mantle plume, the age and geochemicalcharacteristics of this flood basalt province are being determinedby studying stratigraphic sections of basalt flows at severallocations. Sections from the NW, northcentral, east andSE parts of the archipelago have been studied. Here we reportresults for a 597 m succession of lavas from Mont Tourmentefrom the Plateau Central, a region of the archipelago that hasnot been studied in detail. Mont Tourmente lavas range from |
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