Melt segregations in a Columbia River Basalt lava flow: A possible mechanism for the formation of highly evolved mafic magmas

Hartley, M. E. and Thordarson, T. (2009) Melt segregations in a Columbia River Basalt lava flow: A possible mechanism for the formation of highly evolved mafic magmas. Lithos, 112 (3–4). pp. 434-446. DOI 10.1016/j.lithos.2009.04.003

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Abstract

The Levering lava lies within the Grande Ronde Formation of the Columbia River Basalt Group. At Sentinel Gap it consists of a 14–20 m-thick pahoehoe sheet lobe featuring the threefold vertical division typical of inflated pahoehoe lobes into basal zone, lava core and lava crust. Segregation structures such as horizontal vesicle sheets are exceptionally well developed at the lava core to lava crust interface. The lava core contains numerous well-developed vesicle cylinders which extend from the basal zone up through the core and transform into horizontal vesicle sheets at the interface with the upper crust.

Item Type: Article
Subjects: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Divisions: 05 - Petrology - Igneous, Metamorphic and Volcanic Studies
Journal or Publication Title: Lithos
Volume: 112
Page Range: pp. 434-446
Identification Number: 10.1016/j.lithos.2009.04.003
Depositing User: Sarah Humbert
Date Deposited: 21 Mar 2012 17:11
Last Modified: 23 Jul 2013 10:03
URI: http://eprints.esc.cam.ac.uk/id/eprint/2408

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