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Timing of hot spot-related volcanism and the breakup of Madagascar and India

Timing of hot spot-related volcanism and the breakup of Madagascar and India
Timing of hot spot-related volcanism and the breakup of Madagascar and India
Widespread basalts and rhyolites were erupted in Madagascar during the Late Cretaceous. These are considered to be related to the Marion hot spot and the breakup of Madagascar and Greater India. Seventeen argon-40/argon-39 age determinations reveal that volcanic rocks and dikes from the 1500-kilometer-long rifted eastern margin of Madagascar were emplaced rapidly (mean age = 87.6 ± 0.6 million years ago) and that the entire duration of Cretaceous volcanism on the island was no more than 6 million years. The evidence suggests that the thick lava pile at Volcan de l'Androy in the south of the island marks the focal point of the Marion hot spot at 88 million years ago and that this mantle plume was instrumental in causing continental breakup.
0036-8075
852-855
Storey, M.
b5c49e7e-bfcb-4303-89cb-c271dd7398a0
Mahoney, J.J.
869cba5a-abfd-4667-811e-c23d7504f116
Saunders, A.D.
2b8f71a7-cbdc-47ea-a009-155a7f3b3e26
Duncan, R.A.
a092aea5-f9ad-4617-9dd9-060e318120c7
Kelley, S.P.
3e03a75b-d342-4c7e-876b-35bae9be5a92
Coffin, M.F
2d54d1fe-4b0d-44b5-ad4e-512b7bfedf45
Storey, M.
b5c49e7e-bfcb-4303-89cb-c271dd7398a0
Mahoney, J.J.
869cba5a-abfd-4667-811e-c23d7504f116
Saunders, A.D.
2b8f71a7-cbdc-47ea-a009-155a7f3b3e26
Duncan, R.A.
a092aea5-f9ad-4617-9dd9-060e318120c7
Kelley, S.P.
3e03a75b-d342-4c7e-876b-35bae9be5a92
Coffin, M.F
2d54d1fe-4b0d-44b5-ad4e-512b7bfedf45

Storey, M., Mahoney, J.J., Saunders, A.D., Duncan, R.A., Kelley, S.P. and Coffin, M.F (1995) Timing of hot spot-related volcanism and the breakup of Madagascar and India. Science, 267 (5199), 852-855. (doi:10.1126/science.267.5199.852).

Record type: Article

Abstract

Widespread basalts and rhyolites were erupted in Madagascar during the Late Cretaceous. These are considered to be related to the Marion hot spot and the breakup of Madagascar and Greater India. Seventeen argon-40/argon-39 age determinations reveal that volcanic rocks and dikes from the 1500-kilometer-long rifted eastern margin of Madagascar were emplaced rapidly (mean age = 87.6 ± 0.6 million years ago) and that the entire duration of Cretaceous volcanism on the island was no more than 6 million years. The evidence suggests that the thick lava pile at Volcan de l'Androy in the south of the island marks the focal point of the Marion hot spot at 88 million years ago and that this mantle plume was instrumental in causing continental breakup.

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More information

Published date: 10 February 1995
Additional Information: Actually deposited by Jane Conquer

Identifiers

Local EPrints ID: 52426
URI: https://eprints.soton.ac.uk/id/eprint/52426
ISSN: 0036-8075
PURE UUID: 95eb26bb-4ab2-48b2-bbef-5fa81a7e5b3b

Catalogue record

Date deposited: 26 Jun 2008
Last modified: 13 Mar 2019 20:42

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Contributors

Author: M. Storey
Author: J.J. Mahoney
Author: A.D. Saunders
Author: R.A. Duncan
Author: S.P. Kelley
Author: M.F Coffin

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