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A bimodal volcanic sequence of 230 m thickness on Skiff Bank, a western salient of the northern Kerguelen Plateau, was drilled during ODP Leg 183. The sequence comprises three main units: a mafic unit of trachybasalt flows sandwiched between two units of trachytic or rhyolitic flows and...
The Kerguelen hotspot (Indian Ocean) has produced basalt for ∼130 Myr, among the longest known volcanic records from a single source. New and published 40 Ar/ 39 Ar age determinations from the Kerguelen Plateau, Broken Ridge, Rajmahal Traps, and Bunbury basalts, and of Indian and Antarctic...
During Ocean Drilling Program Leg 183, basaltic cores were retrieved from the Northern Kerguelen Plateau (NKP) at Site 1140 on the extreme north of the plateau, ∼270 km north of the Kerguelen Archipelago. Amongst the six basement units recovered, five were pillow basalts with fresh glassy rims...
We report high-precision multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) analyses of Hf isotopic compositions for 39 Kerguelen Archipelago volcanic rocks that add a new perspective to the temporal evolution of the Kerguelen mantle plume. Samples cover the entire range...
Ocean Drilling Program (ODP) Leg 183 was designed to investigate the origin and evolution of the large igneous province composed of the Kerguelen Plateau and Broken Ridge. Of the eight sites drilled, basalt was recovered from seven, five on the plateau and two on Broken Ridge. We present results...
The surface of the Cenozoic Kerguelen Archipelago, constructed on the Kerguelen Plateau in the southern Indian Ocean, is dominantly flood basalt. With the objective of understanding the Cenozoic history of the Kerguelen mantle plume, the age and geochemical characteristics of this flood basalt...
A key element in achieving Ocean Drilling Program Leg 183 science objectives is determining the age of volcanism at different locations across the Kerguelen Plateau and Broken Ridge. This paper reports crystallization ages derived from 40 Ar– 39 Ar incremental heating experiments, for whole...
Submarine pillow basalts (34 Ma) recovered from the Northern Kerguelen Plateau at ODP Site 1140 contain abundant unaltered glass, providing the first opportunity to measure the volatile contents of tholeiitic basaltic magmas related to the Kerguelen mantle plume. The glasses have La/Sm and Nb/Zr...
During the mid-Cretaceous, extensive magmatism occurred in the Indian Ocean to form volcanic portions of the southern and central Kerguelen Plateau, Elan Bank and Broken Ridge. Basalt was erupted also along the rifted margin of eastern India (Rajmahal). We investigated the ages of these Indian...
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