Dynamics of the Galapagos hotspot from helium isotope geochemistry

We have measured the isotopes of He, Sr, Nd and Pb in a number of lava flows from the Galapagos Archipelago; the main goal is to use magmatic helium as a tracer of plume influence in the western volcanoes. Because the Galapagos lava flows are so well preserved, it is also possible to measure surface...

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Bibliographic Details
Published in:Geochimica et cosmochimica acta 1999-12, Vol.63 (23), p.4139-4156
Main Authors: Kurz, Mark D, Geist, D
Format: Article
Language:English
Subjects:
GEOCHEMISTRY
GEOLOGIC MODELS
GEOTHERMAL ENERGY
HOT SPOTS
ISLANDS
ISOTOPE DATING
ISOTOPE RATIO
LAVA
Marine
VOLCANOES
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Summary:We have measured the isotopes of He, Sr, Nd and Pb in a number of lava flows from the Galapagos Archipelago; the main goal is to use magmatic helium as a tracer of plume influence in the western volcanoes. Because the Galapagos lava flows are so well preserved, it is also possible to measure surface exposure ages using in situ cosmic-ray-produced 3He. The exposure ages range from
ISSN:0016-7037
1872-9533
DOI:10.1016/S0016-7037(99)00314-2