Between a Hotspot and a Cold Spot: Isotopic Variation in the Southeast Indian Ridge Asthenosphere, 86{degrees}E-118{degrees}E

• Published in: Journal of Petrology
• Main Authors: MAHONEY, J. J., GRAHAM, D. W., CHRISTIE, D. M., JOHNSON, K. T. M., HALL, L. S., VONDERHAAR, D. L.
• Format: Text
• Language: English
• Published: Oxford University Press 2002
• Subjects: ARTICLES; Antarctic; Australian-Antarctic Discordance; Indian; Kerguelen; Pacific; Southeast Indian Ridge; Antarc*
• Online Access: http://petrology.oxfordjournals.org/cgi/content/short/43/7/1155; https://doi.org/10.1093/petrology/43.7.1155

Glasses from a 2600 km section of the Southeast Indian Ridge west of the Australian–Antarctic Discordance all possess Nd–Pb–Sr isotopic signatures typical of Indian Ocean ridge basalt. The boundary between Pacific- and Indian-Ocean-type ridge basalt within the Discordance thus marks the westernmost...